import { taskWorkspaceSelectionSchema } from "./task-workspace.js";
import { z } from "zod";
import { ISSUE_SUMMARIES_MAX_IDS } from "../constants.js";

import {
  ISSUE_EXECUTION_DECISION_OUTCOMES,
  ISSUE_EXECUTION_MONITOR_CLEAR_REASONS,
  ISSUE_EXECUTION_MONITOR_KINDS,
  ISSUE_EXECUTION_MONITOR_RECOVERY_POLICIES,
  ISSUE_EXECUTION_MONITOR_STATE_STATUSES,
  ISSUE_EXECUTION_POLICY_MODES,
  ISSUE_EXECUTION_STAGE_TYPES,
  ISSUE_EXECUTION_STATE_STATUSES,
  ISSUE_COMMENT_AUTHOR_TYPES,
  ISSUE_COMMENT_METADATA_ROW_TYPES,
  ISSUE_COMMENT_PRESENTATION_KINDS,
  ISSUE_COMMENT_PRESENTATION_TONES,
  ISSUE_COMMENT_PRESENTATION_DENSITIES,
  ISSUE_HARNESS_KINDS,
  ISSUE_MONITOR_SCHEDULED_BY,
  ISSUE_PRIORITIES,
  ISSUE_RECOVERY_ACTION_KINDS,
  ISSUE_RECOVERY_ACTION_OUTCOMES,
  ISSUE_RECOVERY_ACTION_OWNER_TYPES,
  ISSUE_RECOVERY_ACTION_STATUSES,
  ISSUE_REVIEW_POLICIES,
  ISSUE_WORK_MODES,
  clampIssueRequestDepth,
  ISSUE_STATUSES,
  ISSUE_THREAD_INTERACTION_CONTINUATION_POLICIES,
  ISSUE_THREAD_INTERACTION_CANONICAL_RESOLVER_POLICIES,
  ISSUE_THREAD_INTERACTION_EFFECTIVE_RESOLVER_POLICY_SOURCES,
  ISSUE_THREAD_INTERACTION_KINDS,
  ISSUE_THREAD_INTERACTION_RESOLVER_POLICIES,
  ISSUE_THREAD_INTERACTION_RESOLVER_POLICY_PROVENANCES,
  ISSUE_THREAD_INTERACTION_STATUSES,
  ISSUE_WATCHDOG_DISCOVERY_KINDS,
  REQUEST_CHECKBOX_CONFIRMATION_OPTION_LIMIT,
  REQUEST_ITEM_VERDICTS_ITEM_LIMIT,
} from "../constants.js";
import { multilineTextSchema } from "./text.js";
import {
  lowTrustReviewPresetPolicySchema,
  trustAuthorizationPolicySchema,
} from "./trust-policy.js";
import { objectWithoutDefaults } from "./partial.js";
import { questionSetToAskUserQuestionsPayload } from "../question-set.js";

export const issueSummariesQuerySchema = z.object({
  ids: z.string().transform((value) => value.split(",").map((id) => id.trim().toLowerCase()))
    .pipe(z.array(z.string().guid()).min(1).max(ISSUE_SUMMARIES_MAX_IDS))
    .transform((ids) => [...new Set(ids)]),
}).strict();

export const issueBlockedInboxStateSchema = z.enum([
  "needs_attention",
  "awaiting_decision",
  "external_wait",
  "recovery_open",
  "missing_disposition",
]);

export const issueBlockedInboxSeveritySchema = z.enum([
  "critical",
  "high",
  "medium",
  "low",
]);

export const issueBlockedInboxReasonSchema = z.enum([
  "blocked_by_unassigned_issue",
  "blocked_by_assigned_backlog_issue",
  "blocked_by_uninvokable_assignee",
  "blocked_by_cancelled_issue",
  "blocked_chain_stalled",
  "invalid_review_participant",
  "in_review_without_action_path",
  "missing_successful_run_disposition",
  "pending_board_decision",
  "pending_user_decision",
  "external_owner_action",
  "open_recovery_issue",
]);

export const issueBlockedInboxIssueRefSchema = z
  .object({
    id: z.string().guid(),
    identifier: z.string().nullable(),
    title: z.string(),
    status: z.enum(ISSUE_STATUSES),
    priority: z.enum(ISSUE_PRIORITIES),
    assigneeAgentId: z.string().guid().nullable(),
    assigneeUserId: z.string().nullable(),
  })
  .strict();

export const issueBlockedInboxAttentionSchema = z
  .object({
    kind: z.literal("blocked"),
    state: issueBlockedInboxStateSchema,
    reason: issueBlockedInboxReasonSchema,
    severity: issueBlockedInboxSeveritySchema,
    stoppedSinceAt: z.string().datetime().nullable(),
    owner: z
      .object({
        type: z.enum(["agent", "user", "board", "external", "unknown"]),
        agentId: z.string().guid().nullable(),
        userId: z.string().nullable(),
        label: z.string().nullable(),
      })
      .strict(),
    action: z
      .object({
        label: z.string().trim().min(1),
        detail: z.string().nullable(),
      })
      .strict(),
    sourceIssue: issueBlockedInboxIssueRefSchema.nullable(),
    leafIssue: issueBlockedInboxIssueRefSchema.nullable(),
    recoveryIssue: issueBlockedInboxIssueRefSchema.nullable(),
    approvalId: z.string().guid().nullable(),
    interactionId: z.string().guid().nullable(),
    sampleIssueIdentifier: z.string().nullable(),
    redaction: z
      .object({
        externalDetailsRedacted: z.boolean(),
        secretFieldsOmitted: z.literal(true),
      })
      .strict(),
  })
  .strict();

export const ISSUE_EXECUTION_WORKSPACE_PREFERENCES = [
  "inherit",
  "shared_workspace",
  "isolated_workspace",
  "operator_branch",
  "reuse_existing",
  "agent_default",
] as const;

// Mirrors git check-ref-format for a single branch name. The runtime verifies
// the branch actually exists before attaching, so this only rejects values
// that could never be a branch (path escapes, option injection, ref syntax).
export function isValidExistingBranchName(value: string): boolean {
  if (value.length === 0 || value.length > 255) return false;
  if (value.startsWith("-") || value.startsWith("/") || value.startsWith("."))
    return false;
  if (value.endsWith("/") || value.endsWith(".") || value.endsWith(".lock"))
    return false;
  if (
    value.includes("..") ||
    value.includes("//") ||
    value.includes("@{") ||
    value.includes("/.")
  )
    return false;
  // eslint-disable-next-line no-control-regex
  if (/[\x00-\x20\x7f~^:?*[\\]/.test(value)) return false;
  return true;
}

const executionWorkspaceStrategySchema = z
  .object({
    type: z
      .enum([
        "project_primary",
        "git_worktree",
        "adapter_managed",
        "cloud_sandbox",
      ])
      .optional(),
    baseRef: z.string().optional().nullable(),
    branchTemplate: z.string().optional().nullable(),
    existingBranch: z
      .string()
      .trim()
      .refine(isValidExistingBranchName, {
        message: "existingBranch must be a valid git branch name",
      })
      .optional()
      .nullable(),
    worktreeParentDir: z.string().optional().nullable(),
    provisionCommand: z.string().optional().nullable(),
    runtimeProvisionCommand: z.string().optional().nullable(),
    teardownCommand: z.string().optional().nullable(),
  })
  .strict()
  .superRefine((strategy, ctx) => {
    if (!strategy.existingBranch) return;
    if (strategy.type !== "git_worktree") {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        path: ["existingBranch"],
        message:
          'existingBranch requires workspaceStrategy.type "git_worktree"',
      });
    }
    if (strategy.branchTemplate) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        path: ["existingBranch"],
        message: "existingBranch and branchTemplate are mutually exclusive",
      });
    }
  });

const ipv4CidrPattern =
  /^(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\/(?:3[0-2]|[12]?\d)$/;
const protectedTaskEgressCidrs = [
  "0.0.0.0/8",
  "10.0.0.0/8",
  "100.64.0.0/10",
  "127.0.0.0/8",
  "169.254.0.0/16",
  "172.16.0.0/12",
  "192.168.0.0/16",
  "224.0.0.0/4",
] as const;

function ipv4CidrRange(cidr: string): [number, number] | null {
  if (!ipv4CidrPattern.test(cidr)) return null;
  const [address, prefixText] = cidr.split("/");
  const addressValue = address
    .split(".")
    .reduce((value, octet) => value * 256 + Number(octet), 0);
  const prefix = Number(prefixText);
  const blockSize = 2 ** (32 - prefix);
  const start = Math.floor(addressValue / blockSize) * blockSize;
  return [start, start + blockSize - 1];
}

function isAllowedTaskEgressCidr(cidr: string): boolean {
  const range = ipv4CidrRange(cidr);
  if (!range) return false;
  return protectedTaskEgressCidrs.every((protectedCidr) => {
    const protectedRange = ipv4CidrRange(protectedCidr);
    return (
      protectedRange !== null &&
      (range[1] < protectedRange[0] || range[0] > protectedRange[1])
    );
  });
}

export const issueExecutionWorkspaceSettingsSchema = z
  .object({
    mode: z.enum(ISSUE_EXECUTION_WORKSPACE_PREFERENCES).optional(),
    sharedWorkspaceConcurrency: z
      .enum(["auto", "serialize", "allow"])
      .optional(),
    environmentId: z.string().guid().optional().nullable(),
    workspaceStrategy: executionWorkspaceStrategySchema.optional().nullable(),
    workspaceRuntime: z.record(z.string(), z.unknown()).optional().nullable(),
    networkEgress: z
      .object({
        allowFqdns: z
          .array(
            z
              .string()
              .trim()
              .toLowerCase()
              .regex(
                /^(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)*[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?$/,
                "Network egress FQDNs must be hostnames without a URL scheme or path",
              )
              .max(253),
          )
          .max(100)
          .optional(),
        allowCidrs: z
          .array(
            z
              .string()
              .trim()
              .regex(
                ipv4CidrPattern,
                "Invalid IPv4 CIDR (must use octets 0-255 and prefix 0-32)",
              )
              .max(64)
              .refine(
                isAllowedTaskEgressCidr,
                "Task-scoped network egress CIDRs cannot overlap private, loopback, link-local, CGNAT, or multicast ranges",
              ),
          )
          .max(100)
          .optional(),
      })
      .strict()
      .optional()
      .nullable(),
  })
  .strict()
  .superRefine((settings, ctx) => {
    if (
      settings.workspaceStrategy?.existingBranch &&
      settings.mode !== "isolated_workspace"
    ) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        path: ["workspaceStrategy", "existingBranch"],
        message: 'existingBranch requires mode "isolated_workspace"',
      });
    }
  });

export const issueAssigneeAdapterOverridesSchema = z
  .object({
    adapterConfig: z.record(z.string(), z.unknown())
      .refine(config => !Object.prototype.hasOwnProperty.call(config, "homeMode"), "homeMode must be set by an operator on the agent, not on a task")
      .optional(),
    useProjectWorkspace: z.boolean().optional(),
  })
  .strict();

const issueExecutionStagePrincipalBaseSchema = z.object({
  type: z.enum(["agent", "user"]),
  agentId: z.string().guid().optional().nullable(),
  userId: z.string().optional().nullable(),
});

export const issueExecutionStagePrincipalSchema =
  issueExecutionStagePrincipalBaseSchema.superRefine((value, ctx) => {
    if (value.type === "agent") {
      if (!value.agentId) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "Agent participants require agentId",
          path: ["agentId"],
        });
      }
      if (value.userId) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "Agent participants cannot set userId",
          path: ["userId"],
        });
      }
      return;
    }
    if (!value.userId) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "User participants require userId",
        path: ["userId"],
      });
    }
    if (value.agentId) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "User participants cannot set agentId",
        path: ["agentId"],
      });
    }
  });

export const issueExecutionStageParticipantSchema =
  issueExecutionStagePrincipalBaseSchema
    .extend({
      id: z.string().guid().optional(),
    })
    .superRefine((value, ctx) => {
      if (value.type === "agent") {
        if (!value.agentId) {
          ctx.addIssue({
            code: z.ZodIssueCode.custom,
            message: "Agent participants require agentId",
            path: ["agentId"],
          });
        }
        if (value.userId) {
          ctx.addIssue({
            code: z.ZodIssueCode.custom,
            message: "Agent participants cannot set userId",
            path: ["userId"],
          });
        }
        return;
      }
      if (!value.userId) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "User participants require userId",
          path: ["userId"],
        });
      }
      if (value.agentId) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "User participants cannot set agentId",
          path: ["agentId"],
        });
      }
    });

export const issueExecutionStageSchema = z.object({
  id: z.string().guid().optional(),
  type: z.enum(ISSUE_EXECUTION_STAGE_TYPES),
  approvalsNeeded: z.literal(1).optional().default(1),
  participants: z.array(issueExecutionStageParticipantSchema).default([]),
});

export const issueExecutionMonitorPolicySchema = z.object({
  nextCheckAt: z.string().datetime(),
  notes: z.string().max(500).optional().nullable().default(null),
  scheduledBy: z
    .enum(ISSUE_MONITOR_SCHEDULED_BY)
    .optional()
    .default("assignee"),
  kind: z
    .enum(ISSUE_EXECUTION_MONITOR_KINDS)
    .optional()
    .nullable()
    .default(null),
  serviceName: z
    .string()
    .trim()
    .min(1)
    .max(120)
    .optional()
    .nullable()
    .default(null),
  externalRef: z
    .string()
    .trim()
    .min(1)
    .max(500)
    .optional()
    .nullable()
    .default(null),
  timeoutAt: z.string().datetime().optional().nullable().default(null),
  maxAttempts: z
    .number()
    .int()
    .positive()
    .max(100)
    .optional()
    .nullable()
    .default(null),
  recoveryPolicy: z
    .enum(ISSUE_EXECUTION_MONITOR_RECOVERY_POLICIES)
    .optional()
    .nullable()
    .default(null),
});

export const issueExecutionPolicySchema = z.object({
  mode: z.enum(ISSUE_EXECUTION_POLICY_MODES).optional().default("normal"),
  commentRequired: z.boolean().optional().default(true),
  stages: z.array(issueExecutionStageSchema).default([]),
  monitor: issueExecutionMonitorPolicySchema.optional().nullable(),
  reviewPreset: lowTrustReviewPresetPolicySchema.optional(),
  authorizationPolicy: trustAuthorizationPolicySchema.optional(),
  maxReviewRounds: z
    .number()
    .int()
    .positive()
    .max(50)
    .optional()
    .nullable()
    .default(null),
});

export const issueExecutionMonitorStateSchema = z.object({
  status: z.enum(ISSUE_EXECUTION_MONITOR_STATE_STATUSES),
  nextCheckAt: z.string().datetime().nullable(),
  lastTriggeredAt: z.string().datetime().nullable(),
  attemptCount: z.number().int().nonnegative().default(0),
  notes: z.string().max(500).nullable(),
  scheduledBy: z.enum(ISSUE_MONITOR_SCHEDULED_BY).nullable(),
  kind: z
    .enum(ISSUE_EXECUTION_MONITOR_KINDS)
    .nullable()
    .optional()
    .default(null),
  serviceName: z
    .string()
    .trim()
    .min(1)
    .max(120)
    .nullable()
    .optional()
    .default(null),
  externalRef: z
    .string()
    .trim()
    .min(1)
    .max(500)
    .nullable()
    .optional()
    .default(null),
  timeoutAt: z.string().datetime().nullable().optional().default(null),
  maxAttempts: z
    .number()
    .int()
    .positive()
    .max(100)
    .nullable()
    .optional()
    .default(null),
  recoveryPolicy: z
    .enum(ISSUE_EXECUTION_MONITOR_RECOVERY_POLICIES)
    .nullable()
    .optional()
    .default(null),
  clearedAt: z.string().datetime().nullable(),
  clearReason: z.enum(ISSUE_EXECUTION_MONITOR_CLEAR_REASONS).nullable(),
});

export const issueReviewRequestSchema = z
  .object({
    instructions: z.string().trim().min(1).max(20000),
  })
  .strict();

export const issueExecutionStateSchema = z.object({
  status: z.enum(ISSUE_EXECUTION_STATE_STATUSES),
  currentStageId: z.string().guid().nullable(),
  currentStageIndex: z.number().int().nonnegative().nullable(),
  currentStageType: z.enum(ISSUE_EXECUTION_STAGE_TYPES).nullable(),
  currentParticipant: issueExecutionStagePrincipalSchema.nullable(),
  returnAssignee: issueExecutionStagePrincipalSchema.nullable(),
  reviewRequest: issueReviewRequestSchema.nullable().optional().default(null),
  completedStageIds: z.array(z.string().guid()).default([]),
  lastDecisionId: z.string().guid().nullable(),
  lastDecisionOutcome: z.enum(ISSUE_EXECUTION_DECISION_OUTCOMES).nullable(),
  monitor: issueExecutionMonitorStateSchema.optional().nullable(),
  changesRequestedCount: z.number().int().nonnegative().optional().default(0),
});

export const issueRecoveryActionReadModelSchema = z.object({
  id: z.string().guid(),
  companyId: z.string().guid(),
  sourceIssueId: z.string().guid(),
  recoveryIssueId: z.string().guid().nullable(),
  kind: z.enum(ISSUE_RECOVERY_ACTION_KINDS),
  status: z.enum(ISSUE_RECOVERY_ACTION_STATUSES),
  ownerType: z.enum(ISSUE_RECOVERY_ACTION_OWNER_TYPES),
  ownerAgentId: z.string().guid().nullable(),
  ownerUserId: z.string().nullable(),
  previousOwnerAgentId: z.string().guid().nullable(),
  returnOwnerAgentId: z.string().guid().nullable(),
  cause: z.string().min(1),
  fingerprint: z.string().min(1),
  evidence: z.record(z.string(), z.unknown()),
  nextAction: z.string().min(1),
  wakePolicy: z.record(z.string(), z.unknown()).nullable(),
  monitorPolicy: z.record(z.string(), z.unknown()).nullable(),
  attemptCount: z.number().int().nonnegative(),
  maxAttempts: z.number().int().positive().nullable(),
  timeoutAt: z.union([z.date(), z.string().datetime()]).nullable(),
  lastAttemptAt: z.union([z.date(), z.string().datetime()]).nullable(),
  outcome: z.enum(ISSUE_RECOVERY_ACTION_OUTCOMES).nullable(),
  resolutionNote: z.string().nullable(),
  resolvedAt: z.union([z.date(), z.string().datetime()]).nullable(),
  createdAt: z.union([z.date(), z.string().datetime()]),
  updatedAt: z.union([z.date(), z.string().datetime()]),
});

export type IssueRecoveryActionReadModel = z.infer<
  typeof issueRecoveryActionReadModelSchema
>;

const RESOLVE_ISSUE_RECOVERY_ACTION_OUTCOMES = [
  "restored",
  "false_positive",
  "blocked",
  "cancelled",
] as const;

export const resumeWorkspaceFinalizationSchema = z.object({
  actionId: z.string().guid(),
  runId: z.string().guid(),
  ownerToken: z.string().guid(),
  controllerAndCopybackStopped: z.literal(true),
  stopEvidence: z.string().trim().min(20).max(12000),
}).strict();

export const retryWorkspaceExportSchema = z.object({
  actionId: z.string().guid(),
  runId: z.string().guid(),
  repairNote: z.string().trim().min(20).max(12000),
}).strict();

export const reconstructWorkspaceSchema = z.object({
  actionId: z.string().guid(),
  runId: z.string().guid(),
  expectedStatusVersion: z.number().int().nonnegative(),
  attachmentIds: z.array(z.string().guid()).min(1).max(20).refine(ids => new Set(ids).size === ids.length),
  missingWork: z.string().trim().min(20).max(12000),
  actionOutcome: z.enum(["completed", "not_performed", "mixed"]),
  outcomeEvidence: z.string().trim().min(20).max(12000),
  acknowledgeLostWork: z.literal(true),
}).strict();

export const resolveIssueRecoveryActionSchema = z
  .object({
    workspaceBaseRef: z.object({
      requestedRef: z.string().trim().min(1).max(1024),
      branch: z.string().trim().refine(isValidExistingBranchName, { message: "Choose a valid Git branch name" }),
    }).strict().optional(),
    executionReconciliation: z
      .object({
        runId: z.string().guid(),
        providerStopped: z.literal(true),
        actionOutcome: z.enum(["completed", "not_performed", "mixed"]),
        outcomeEvidence: z.string().trim().min(20).max(12000),
        workspaceRepairEvidence: z.string().trim().min(20).max(12000).optional(),
      })
      .strict()
      .optional(),
    actionId: z.string().guid().optional(),
    outcome: z.enum(RESOLVE_ISSUE_RECOVERY_ACTION_OUTCOMES),
    sourceIssueStatus: z.enum(ISSUE_STATUSES),
    resolutionNote: multilineTextSchema.optional().nullable(),
  })
  .strict()
  .superRefine((value, ctx) => {
    if (value.workspaceBaseRef && (!value.actionId || value.outcome !== "restored" || value.sourceIssueStatus !== "todo" || value.executionReconciliation)) {
      ctx.addIssue({ code: z.ZodIssueCode.custom, path: ["workspaceBaseRef"], message: "Branch repair must retry the exact recovery action" });
    }
    if (value.outcome === "restored") {
      // A retained-source repair records evidence without changing task state.
      // The route verifies the exact server-owned source and unchanged status.
      if (value.executionReconciliation?.workspaceRepairEvidence) return;
      if (
        value.sourceIssueStatus !== "todo" &&
        value.sourceIssueStatus !== "done" &&
        value.sourceIssueStatus !== "in_review"
      ) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message:
            "Restored recovery actions must move the source issue to todo, done, or in_review",
          path: ["sourceIssueStatus"],
        });
      }
      return;
    }

    if (value.outcome === "blocked") {
      if (value.sourceIssueStatus !== "blocked") {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message:
            "Blocked recovery actions must move the source issue to blocked",
          path: ["sourceIssueStatus"],
        });
      }
      return;
    }

    if (value.outcome === "false_positive" || value.outcome === "cancelled") {
      if (
        value.sourceIssueStatus !== "done" &&
        value.sourceIssueStatus !== "in_review"
      ) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message:
            "This recovery outcome requires sourceIssueStatus to be done or in_review",
          path: ["sourceIssueStatus"],
        });
      }
      return;
    }
  });

export type ResolveIssueRecoveryAction = z.infer<
  typeof resolveIssueRecoveryActionSchema
>;

const issueRequestDepthInputSchema = z
  .number()
  .int()
  .nonnegative()
  .transform((value) => clampIssueRequestDepth(value));

type IssueCreateStatusDefaultInput = {
  status?: unknown;
  assigneeAgentId?: unknown;
  assigneeUserId?: unknown;
};

export function resolveCreateIssueStatusDefault(
  input: IssueCreateStatusDefaultInput,
): {
  status: (typeof ISSUE_STATUSES)[number];
  defaulted: boolean;
  reason: "explicit" | "assigned_omitted_status" | "unassigned_omitted_status";
} {
  if (typeof input.status === "string") {
    return {
      status: input.status as (typeof ISSUE_STATUSES)[number],
      defaulted: false,
      reason: "explicit",
    };
  }

  const hasAssignee =
    (typeof input.assigneeAgentId === "string" &&
      input.assigneeAgentId.length > 0) ||
    (typeof input.assigneeUserId === "string" &&
      input.assigneeUserId.length > 0);
  return {
    status: hasAssignee ? "todo" : "backlog",
    defaulted: true,
    reason: hasAssignee
      ? "assigned_omitted_status"
      : "unassigned_omitted_status",
  };
}

function withCreateIssueStatusDefault<T extends z.ZodRawShape>(
  schema: z.ZodObject<T>,
) {
  return z.preprocess((input) => {
    if (!input || typeof input !== "object" || Array.isArray(input))
      return input;
    const raw = input as Record<string, unknown>;
    if (raw.status !== undefined) return input;
    return {
      ...raw,
      status: resolveCreateIssueStatusDefault(raw).status,
    };
  }, schema);
}

const createIssueBaseSchema = z.object({
  projectId: z.string().guid().optional().nullable(),
  projectWorkspaceId: z.string().guid().optional().nullable(),
  goalId: z.string().guid().optional().nullable(),
  visibility: z.enum(["open", "private"]).optional().default("open"),
  parentId: z.string().guid().optional().nullable(),
  blockedByIssueIds: z.array(z.string().guid()).optional(),
  unblockDescriptor: z
    .object({
      owner: z.union([
        z.object({ agentId: z.string().guid() }).strict(),
        z.object({ userId: z.string().trim().min(1) }).strict(),
        z.literal("board"),
      ]),
      action: multilineTextSchema.pipe(z.string().trim().min(1).max(2_000)),
    })
    .strict()
    .optional()
    .nullable(),
  inheritExecutionWorkspaceFromIssueId: z.string().guid().optional().nullable(),
  title: z.string().min(1),
  description: multilineTextSchema.optional().nullable(),
  status: z.enum(ISSUE_STATUSES),
  workMode: z.enum(ISSUE_WORK_MODES).optional().default("standard"),
  harnessKind: z.enum(ISSUE_HARNESS_KINDS).optional().nullable(),
  priority: z.enum(ISSUE_PRIORITIES).optional().default("medium"),
  reviewPolicy: z.enum(ISSUE_REVIEW_POLICIES).optional().nullable(),
  assigneeAgentId: z.string().guid().optional().nullable(),
  assigneeUserId: z.string().optional().nullable(),
  requestDepth: issueRequestDepthInputSchema.optional().default(0),
  createdByUserId: z.string().optional().nullable(),
  responsibleUserId: z.string().optional().nullable(),
  billingCode: z.string().optional().nullable(),
  assigneeAdapterOverrides: issueAssigneeAdapterOverridesSchema
    .optional()
    .nullable(),
  executionPolicy: issueExecutionPolicySchema.optional().nullable(),
  executionWorkspaceId: z.string().guid().optional().nullable(),
  executionWorkspacePreference: z
    .enum(ISSUE_EXECUTION_WORKSPACE_PREFERENCES)
    .optional()
    .nullable(),
  workspaceSelection: taskWorkspaceSelectionSchema.optional(),
  executionWorkspaceSettings: issueExecutionWorkspaceSettingsSchema
    .optional()
    .nullable(),
  labelIds: z.array(z.string().guid()).optional(),
  watchdogDiscovery: z
    .object({
      kind: z.enum(ISSUE_WATCHDOG_DISCOVERY_KINDS),
      evidenceMarkdown: multilineTextSchema.optional().nullable(),
    })
    .strict()
    .optional()
    .nullable(),
  watchdog: z
    .object({
      agentId: z.string().guid(),
      instructions: multilineTextSchema.optional().nullable(),
    })
    .strict()
    .optional()
    .nullable(),
});

function requireBlockedStatusForUnblockDescriptor(
  value: { status?: string; unblockDescriptor?: unknown },
  ctx: z.RefinementCtx,
) {
  if (
    value.unblockDescriptor != null &&
    value.status !== undefined &&
    value.status !== "blocked"
  ) {
    ctx.addIssue({
      code: z.ZodIssueCode.custom,
      message: "unblockDescriptor requires blocked status",
      path: ["unblockDescriptor"],
    });
  }
}

const createIssueDuplicateGuardSchema = {
  initialPlan: z.string().min(1).max(200000).optional().nullable(),
  idempotencyKey: z.string().trim().min(1).max(255).optional().nullable(),
  allowDuplicate: z
    .boolean()
    .describe(
      "Bypasses recent-title duplicate detection; idempotency keys always replay their original issue",
    )
    .optional()
    .default(false),
};

// Narrow intent flag set by the onboarding wizard on the single first task. The
// server owns the resulting origin kind (clients cannot set arbitrary origin
// kinds) and uses it to seed the agent greeting instead of an LLM welcome step.
const onboardingFirstTaskMarkerSchema = {
  onboardingFirstTask: z.boolean().optional(),
};

export const createIssueInputSchema = createIssueBaseSchema.extend({
  title: z.string().optional(),
  status: createIssueBaseSchema.shape.status.optional(),
  ...createIssueDuplicateGuardSchema,
  ...onboardingFirstTaskMarkerSchema,
});

function requireTitleOrDescription(
  value: { title?: string; description?: string | null },
  ctx: z.RefinementCtx,
) {
  if (!value.title?.trim() && !value.description?.trim()) {
    ctx.addIssue({ code: z.ZodIssueCode.custom, path: ["title"], message: "Provide a title or task description" });
  }
}

export const createIssueSchema = withCreateIssueStatusDefault(
  createIssueBaseSchema.extend({
    title: z.string().optional(),
    ...createIssueDuplicateGuardSchema,
    ...onboardingFirstTaskMarkerSchema,
  }),
).superRefine(requireBlockedStatusForUnblockDescriptor).superRefine(requireTitleOrDescription);

export const setIssueTitleSchema = z.object({
  title: z.string().trim().min(1).max(240),
  onlyIfProvisional: z.boolean().optional().default(false),
  idempotencyKey: z.string().trim().min(1).max(240).optional(),
}).strict();

export type SetIssueTitle = z.input<typeof setIssueTitleSchema>;

export type CreateIssue = z.infer<typeof createIssueSchema>;

export const upsertIssueWatchdogSchema = z
  .object({
    agentId: z.string().guid(),
    instructions: multilineTextSchema.optional().nullable(),
  })
  .strict();

export type UpsertIssueWatchdog = z.infer<typeof upsertIssueWatchdogSchema>;

export const createChildIssueSchema = withCreateIssueStatusDefault(
  createIssueBaseSchema
    .omit({
      parentId: true,
      inheritExecutionWorkspaceFromIssueId: true,
      watchdogDiscovery: true,
    })
    .extend({
      title: z.string().optional(),
      acceptanceCriteria: z
        .array(z.string().trim().min(1).max(500))
        .max(20)
        .optional(),
      blockParentUntilDone: z.boolean().optional().default(false),
    }),
).superRefine(requireBlockedStatusForUnblockDescriptor).superRefine(requireTitleOrDescription);

export type CreateChildIssue = z.infer<typeof createChildIssueSchema>;

export const createAcceptedPlanDecompositionSchema = z.object({
  acceptedPlanRevisionId: z.string().guid(),
  children: z.array(createChildIssueSchema).min(1).max(25),
});

export type CreateAcceptedPlanDecomposition = z.infer<
  typeof createAcceptedPlanDecompositionSchema
>;

export const createIssueLabelSchema = z.object({
  name: z.string().trim().min(1).max(48),
  color: z
    .string()
    .regex(/^#(?:[0-9a-fA-F]{6})$/, "Color must be a 6-digit hex value"),
});

export type CreateIssueLabel = z.infer<typeof createIssueLabelSchema>;

const issueCommentAttachmentIdsSchema = z
  .array(z.string().uuid())
  .max(20)
  .refine((ids) => new Set(ids).size === ids.length, {
    message: "Attachment ids must be unique",
  });

export const updateIssueSchema = objectWithoutDefaults(
  createIssueBaseSchema.omit({
    workspaceSelection: true,
    createdByUserId: true,
    responsibleUserId: true,
    watchdog: true,
  }),
)
  .partial()
  .extend({
    expectedStatusVersion: z.number().int().nonnegative().optional(),
    /** Reject a policy write if the policy changed after the caller read it. */
    expectedExecutionPolicy: z.record(z.string(), z.unknown()).optional().nullable(),
    requestDepth: issueRequestDepthInputSchema.optional(),
    assigneeAgentId: z.string().trim().min(1).optional().nullable(),
    comment: multilineTextSchema.pipe(z.string().min(1)).optional(),
    commentClientRequestId: z.string().uuid().optional(),
    /** Only valid with a comment; the route binds these in the update transaction. */
    attachmentIds: issueCommentAttachmentIdsSchema.optional(),
    onBehalfOfUserId: z.string().trim().min(1).optional().nullable(),
    reviewInteractionId: z.string().guid().optional(),
    reviewRequest: issueReviewRequestSchema.optional().nullable(),
    reopen: z.boolean().optional(),
    resume: z.boolean().optional(),
    interrupt: z.boolean().optional(),
    /** Assignment-only handoff; the following structured goal action owns the wake. */
    deferWakeForGoal: z.boolean().optional(),
    hiddenAt: z.string().datetime().nullable().optional(),
  });

export type UpdateIssue = z.infer<typeof updateIssueSchema>;
export type IssueExecutionWorkspaceSettings = z.infer<
  typeof issueExecutionWorkspaceSettingsSchema
>;

export const stalledReviewDecisionSchema = z
  .object({
    action: z.enum(["approve", "request_changes", "send_back"]),
    note: multilineTextSchema.pipe(z.string().min(1)).optional(),
  })
  .strict()
  .superRefine((value, ctx) => {
    if (value.action === "request_changes" && !value.note?.trim()) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        path: ["note"],
        message: "Request changes requires a note",
      });
    }
  });

export type StalledReviewDecision = z.infer<typeof stalledReviewDecisionSchema>;

export const checkoutIssueSchema = z.object({
  agentId: z.string().guid(),
  expectedStatuses: z.array(z.enum(ISSUE_STATUSES)).nonempty(),
});

export type CheckoutIssue = z.infer<typeof checkoutIssueSchema>;

const commentMetadataLabelSchema = z.string().trim().min(1).max(120);
const commentMetadataTextSchema = z.string().trim().min(1).max(2000);

export const issueCommentAuthorTypeSchema = z.enum(ISSUE_COMMENT_AUTHOR_TYPES);

export const issueCommentPresentationSchema = z
  .object({
    kind: z.enum(ISSUE_COMMENT_PRESENTATION_KINDS).default("message"),
    tone: z.enum(ISSUE_COMMENT_PRESENTATION_TONES).default("neutral"),
    title: z.string().trim().min(1).max(160).nullable().optional(),
    detailsDefaultOpen: z.boolean().optional().default(false),
    density: z.enum(ISSUE_COMMENT_PRESENTATION_DENSITIES).optional(),
  })
  .strict();

export type IssueCommentPresentation = z.infer<
  typeof issueCommentPresentationSchema
>;

const issueCommentMetadataBaseRowSchema = z.object({
  type: z.enum(ISSUE_COMMENT_METADATA_ROW_TYPES),
  label: commentMetadataLabelSchema.nullable().optional(),
});

const issueCommentMetadataTextRowSchema = issueCommentMetadataBaseRowSchema
  .extend({
    type: z.literal("text"),
    text: commentMetadataTextSchema,
  })
  .strict();

const issueCommentMetadataCodeRowSchema = issueCommentMetadataBaseRowSchema
  .extend({
    type: z.literal("code"),
    code: z.string().min(1).max(4000),
    language: z.string().trim().min(1).max(40).nullable().optional(),
  })
  .strict();

const issueCommentMetadataKeyValueRowSchema = issueCommentMetadataBaseRowSchema
  .extend({
    type: z.literal("key_value"),
    label: commentMetadataLabelSchema,
    value: commentMetadataTextSchema,
  })
  .strict();

const issueCommentMetadataIssueLinkRowSchema = issueCommentMetadataBaseRowSchema
  .extend({
    type: z.literal("issue_link"),
    issueId: z.string().guid().nullable().optional(),
    identifier: z.string().trim().min(1).max(80).nullable().optional(),
    title: z.string().trim().min(1).max(240).nullable().optional(),
  })
  .strict();

const issueCommentMetadataAgentLinkRowSchema = issueCommentMetadataBaseRowSchema
  .extend({
    type: z.literal("agent_link"),
    agentId: z.string().guid(),
    name: z.string().trim().min(1).max(160).nullable().optional(),
  })
  .strict();

const issueCommentMetadataRunLinkRowSchema = issueCommentMetadataBaseRowSchema
  .extend({
    type: z.literal("run_link"),
    runId: z.string().guid(),
    agentId: z.string().guid().nullable().optional(),
    title: z.string().trim().min(1).max(160).nullable().optional(),
  })
  .strict();

export const issueCommentMetadataRowSchema = z
  .discriminatedUnion("type", [
    issueCommentMetadataTextRowSchema,
    issueCommentMetadataCodeRowSchema,
    issueCommentMetadataKeyValueRowSchema,
    issueCommentMetadataIssueLinkRowSchema,
    issueCommentMetadataAgentLinkRowSchema,
    issueCommentMetadataRunLinkRowSchema,
  ])
  .superRefine((value, ctx) => {
    if (value.type === "issue_link" && !value.issueId && !value.identifier) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "Issue link rows require issueId or identifier",
        path: ["issueId"],
      });
    }
  });

export const issueCommentMetadataSectionSchema = z
  .object({
    title: z.string().trim().min(1).max(160).nullable().optional(),
    rows: z.array(issueCommentMetadataRowSchema).min(1).max(50),
  })
  .strict();

export const issueCommentMetadataSchema = z
  .object({
    version: z.literal(1),
    sourceChannel: z.literal("imessage-photon").optional(),
    sourceRunId: z.string().guid().nullable().optional(),
    authorizationReason: z
      .string()
      .trim()
      .min(1)
      .max(160)
      .nullable()
      .optional(),
    recovery: z.object({
      kind: z.literal("disposition_repair_escalated"),
      actionId: z.string().guid(),
      attemptCount: z.number().int().nonnegative(),
      maxAttempts: z.number().int().positive(),
      reason: z.string().trim().min(1).max(160),
      assigneeAgentId: z.string().guid().nullable(),
    }).strict().optional(),
    sections: z.array(issueCommentMetadataSectionSchema).min(1).max(20),
  })
  .strict();

export type IssueCommentMetadata = z.infer<typeof issueCommentMetadataSchema>;

export const addIssueCommentSchema = z.object({
  clientRequestId: z.string().uuid().optional(),
  body: multilineTextSchema.pipe(z.string().min(1)),
  attachmentIds: issueCommentAttachmentIdsSchema.optional(),
  onBehalfOfUserId: z.string().trim().min(1).optional().nullable(),
  authorType: issueCommentAuthorTypeSchema.optional(),
  presentation: issueCommentPresentationSchema.nullable().optional(),
  metadata: issueCommentMetadataSchema.nullable().optional(),
  reopen: z.boolean().optional(),
  resume: z.boolean().optional(),
  interrupt: z.boolean().optional(),
});

export type AddIssueComment = z.infer<typeof addIssueCommentSchema>;

export const issueThreadInteractionStatusSchema = z.enum(
  ISSUE_THREAD_INTERACTION_STATUSES,
);
export const issueThreadInteractionKindSchema = z.enum(
  ISSUE_THREAD_INTERACTION_KINDS,
);
export const issueThreadInteractionCanonicalResolverPolicySchema = z
  .enum(ISSUE_THREAD_INTERACTION_CANONICAL_RESOLVER_POLICIES)
  .describe("Canonical resolver audience: anyone, not_creator, or human_only.");
export const issueThreadInteractionResolverPolicySchema = z
  .enum(ISSUE_THREAD_INTERACTION_RESOLVER_POLICIES)
  .describe(
    "Resolver audience. Use anyone, not_creator, or human_only; board_or_agents and board_only are deprecated compatibility aliases.",
  );
export const issueThreadInteractionResolverPolicyProvenanceSchema = z.enum(
  ISSUE_THREAD_INTERACTION_RESOLVER_POLICY_PROVENANCES,
);
export const issueThreadInteractionEffectiveResolverPolicySourceSchema = z.enum(
  ISSUE_THREAD_INTERACTION_EFFECTIVE_RESOLVER_POLICY_SOURCES,
);
export const issueThreadInteractionContinuationPolicySchema = z.enum(
  ISSUE_THREAD_INTERACTION_CONTINUATION_POLICIES,
);

export const connectionIntentPhaseSchema = z.enum([
  "requested",
  "authorizing",
  "needs_retry",
]);
const connectionIntentBrandAssetSchema = z
  .string()
  .max(2048)
  .refine((value) => {
    if (/^\/brands\/apps\/[a-z0-9][a-z0-9._-]*\.(?:svg|png)$/i.test(value))
      return true;
    try {
      return new URL(value).protocol === "https:";
    } catch {
      return false;
    }
  }, "Connection intent brand assets must be HTTPS URLs or local app brand paths");

export const connectionIntentPayloadSchema = z
  .object({
    accessRequest: z.object({
      connectionId: z.string().guid(),
      connectionName: z.string().trim().min(1).max(160),
      tools: z.array(z.object({
        catalogEntryId: z.string().guid(),
        toolName: z.string().trim().min(1).max(160),
        versionHash: z.string().min(1).max(256),
        permission: z.enum(["allowed", "ask_first"]),
      }).strict()).min(1).max(20).refine(tools => new Set(tools.map(tool => tool.catalogEntryId)).size === tools.length, "Requested tools must be unique"),
    }).strict().optional(),
    upstreamService: z.object({ slug: z.string().min(1).max(120), name: z.string().min(1).max(160), selectionInteractionId: z.string().guid().optional() }).strict().optional(),
    purpose: z.enum(["ai", "channel"]).optional(),
    version: z.literal(1),
    serviceSlug: z.string().trim().min(1).max(120),
    serviceName: z.string().trim().min(1).max(160),
    serviceLogoUrl: connectionIntentBrandAssetSchema.nullable().optional(),
    serviceDarkLogoUrl: connectionIntentBrandAssetSchema.nullable().optional(),
    requestingAgentId: z.string().guid(),
    requestingAgentName: z.string().trim().min(1).max(160),
    phase: connectionIntentPhaseSchema,
  })
  .strict();

export const connectionIntentResultSchema = z
  .object({
    version: z.literal(1),
    instruction: z.string().max(4000).optional(),
    outcome: z.enum(["connected", "declined", "superseded", "expired"]),
    connectionId: z.string().guid().nullable().optional(),
    reason: z.string().trim().max(4000).nullable().optional(),
    supersededByInteractionId: z.string().guid().nullable().optional(),
  })
  .strict()
  .superRefine((value, ctx) => {
    if (value.outcome === "connected" && !value.connectionId) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        path: ["connectionId"],
        message: "Connected intents require a connection id",
      });
    }
    if (value.outcome === "superseded" && !value.supersededByInteractionId) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        path: ["supersededByInteractionId"],
        message: "Superseded intents require the replacement interaction id",
      });
    }
  });

export const issueDocumentKeySchema = z
  .string()
  .trim()
  .min(1)
  .max(64)
  .regex(
    /^[a-z0-9][a-z0-9_-]*$/,
    "Document key must be lowercase letters, numbers, _ or -",
  );

export const suggestedTaskDraftSchema = z
  .object({
    clientKey: z.string().trim().min(1).max(120),
    parentClientKey: z.string().trim().min(1).max(120).nullable().optional(),
    parentId: z.string().guid().nullable().optional(),
    title: z.string().trim().min(1).max(240),
    description: multilineTextSchema
      .pipe(z.string().trim().max(20000))
      .nullable()
      .optional(),
    priority: z.enum(ISSUE_PRIORITIES).nullable().optional(),
    workMode: z.enum(ISSUE_WORK_MODES).nullable().optional(),
    assigneeAgentId: z.string().guid().nullable().optional(),
    assigneeUserId: z.string().trim().min(1).nullable().optional(),
    projectId: z.string().guid().nullable().optional(),
    goalId: z.string().guid().nullable().optional(),
    billingCode: z.string().trim().max(120).nullable().optional(),
    labels: z.array(z.string().trim().min(1).max(48)).max(20).optional(),
    hiddenInPreview: z.boolean().optional(),
  })
  .superRefine((value, ctx) => {
    if (value.assigneeAgentId && value.assigneeUserId) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "Suggested tasks can only target one assignee",
        path: ["assigneeAgentId"],
      });
    }
  });

export const suggestTasksPayloadSchema = z
  .object({
    version: z.literal(1),
    defaultParentId: z.string().guid().nullable().optional(),
    tasks: z.array(suggestedTaskDraftSchema).min(1).max(50),
  })
  .superRefine((value, ctx) => {
    const seenClientKeys = new Set<string>();
    for (const [index, task] of value.tasks.entries()) {
      if (seenClientKeys.has(task.clientKey)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "clientKey must be unique within one interaction",
          path: ["tasks", index, "clientKey"],
        });
        continue;
      }
      seenClientKeys.add(task.clientKey);
    }
  });

export const suggestTasksResultCreatedTaskSchema = z.object({
  clientKey: z.string().trim().min(1).max(120),
  issueId: z.string().guid(),
  identifier: z.string().trim().min(1).nullable().optional(),
  title: z.string().trim().min(1).nullable().optional(),
  parentIssueId: z.string().guid().nullable().optional(),
  parentIdentifier: z.string().trim().min(1).nullable().optional(),
});

export const suggestTasksResultSchema = z.object({
  version: z.literal(1),
  outcome: z
    .enum(["skipped", "withdrawn", "issue_closed", "addressee_deleted"])
    .optional(),
  reason: z.string().trim().max(4000).nullable().optional(),
  createdTasks: z.array(suggestTasksResultCreatedTaskSchema).max(50).optional(),
  skippedClientKeys: z
    .array(z.string().trim().min(1).max(120))
    .max(50)
    .optional(),
  rejectionReason: z.string().trim().max(4000).nullable().optional(),
});

export const askUserQuestionsQuestionOptionSchema = z.object({
  id: z.string().trim().min(1).max(160),
  label: z.string().trim().min(1).max(1000),
  description: z.string().trim().max(4000).nullable().optional(),
  freeText: z
    .boolean()
    .optional()
    .describe(
      "When true, selecting this option reveals an inline text field; the typed value is returned as the question's otherText. Use this for a real \"I'll describe it\" choice instead of authoring a dead option that does nothing. At most one free-text option per question.",
    ),
});

export const askUserQuestionsQuestionSchema = z.object({
  id: z.string().trim().min(1).max(160),
  prompt: z.string().trim().min(1).max(4000),
  helpText: z.string().trim().max(4000).nullable().optional(),
  selectionMode: z.enum(["single", "multi"]),
  required: z.boolean().optional(),
  allowOther: z.boolean().optional(),
  options: z.array(askUserQuestionsQuestionOptionSchema).min(1).max(129),
});

const paperclipQuestionOptionSchema = z.object({
  id: z.string().min(1).max(160),
  label: z.string().min(1).max(1000),
  description: z.string().max(4000).optional(),
  recommended: z.boolean().optional(),
});

const paperclipQuestionSchema = z
  .object({
    id: z.string().min(1).max(160),
    header: z.string().max(1000).optional(),
    prompt: z.string().min(1).max(4000),
    helpText: z.string().max(4000).optional(),
    required: z.boolean(),
    answerMode: z.enum(["single_select", "multi_select", "text"]),
    initialText: z.string().refine(value => value.length <= 200000 && Array.from(value).length <= 100000, "initial text exceeds 100000 Unicode code points").optional(),
    options: z.array(paperclipQuestionOptionSchema).max(128).optional(),
    customAnswer: z
      .object({
        enabled: z.literal(true),
        label: z.string().max(1000).optional(),
        placeholder: z.string().max(1000).optional(),
      })
      .optional(),
    textValidation: z
      .object({
        minLength: z.number().int().min(0).max(100000).optional(),
        maxLength: z.number().int().min(0).max(100000).optional(),
        pattern: z.string().max(1000).optional(),
        inputType: z.enum(["text", "number", "integer"]).optional(),
        minimum: z.number().finite().optional(),
        maximum: z.number().finite().optional(),
      })
      .optional(),
  })
  .superRefine((value, ctx) => {
    if (value.initialText !== undefined && value.answerMode !== "text") {
      ctx.addIssue({ code: z.ZodIssueCode.custom, message: "only text questions can define initial text", path: ["initialText"] });
    }
    if (
      value.answerMode === "text" &&
      value.options &&
      value.options.length > 0
    ) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "text questions cannot define options",
        path: ["options"],
      });
    }
    if (
      value.answerMode !== "text" &&
      (!value.options || value.options.length === 0)
    ) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "select questions require options",
        path: ["options"],
      });
    }
    if (value.answerMode === "text" && value.customAnswer) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "text questions cannot define customAnswer",
        path: ["customAnswer"],
      });
    }
    if (
      value.textValidation?.minLength !== undefined &&
      value.textValidation.maxLength !== undefined &&
      value.textValidation.minLength > value.textValidation.maxLength
    ) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "minLength cannot exceed maxLength",
        path: ["textValidation"],
      });
    }
    if (
      value.textValidation?.minimum !== undefined &&
      value.textValidation.maximum !== undefined &&
      value.textValidation.minimum > value.textValidation.maximum
    ) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "minimum cannot exceed maximum",
        path: ["textValidation"],
      });
    }
    if (value.textValidation?.pattern !== undefined) {
      try {
        new RegExp(value.textValidation.pattern);
      } catch {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "pattern must be a valid regular expression",
          path: ["textValidation", "pattern"],
        });
      }
    }
    const optionIds = value.options?.map((option) => option.id) ?? [];
    if (new Set(optionIds).size !== optionIds.length) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "option ids must be unique",
        path: ["options"],
      });
    }
  });

export const paperclipQuestionSetPayloadSchema = z
  .object({
    schema: z.literal("paperclip.question_set.v1"),
    title: z.string().max(1000).optional(),
    description: z.string().max(100_000).optional(),
    submitLabel: z.string().max(200).optional(),
    questions: z.array(paperclipQuestionSchema).min(1).max(64),
  })
  .superRefine((value, ctx) => {
    const questionIds = value.questions.map((question) => question.id);
    if (new Set(questionIds).size !== questionIds.length) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "question ids must be unique",
        path: ["questions"],
      });
    }
  });

const askUserQuestionsPayloadFields = {
  version: z.literal(1),
  title: z.string().trim().max(240).nullable().optional(),
  submitLabel: z.string().trim().max(120).nullable().optional(),
  supersedeOnUserComment: z.boolean().optional(),
  questions: z.array(askUserQuestionsQuestionSchema).min(1).max(64),
  /** Exact canonical presentation retained for a recovered harness request. */
  questionSet: paperclipQuestionSetPayloadSchema.optional(),
  /** Stable correlation for draft handoff from a live runtime request. */
  runtimeRequestId: z.string().trim().min(1).max(255).nullable().optional(),
};

export const askUserQuestionsPayloadSchema = z
  .object(askUserQuestionsPayloadFields)
  .superRefine((value, ctx) => {
    const seenQuestionIds = new Set<string>();
    for (const [questionIndex, question] of value.questions.entries()) {
      if (seenQuestionIds.has(question.id)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "Question ids must be unique within one interaction",
          path: ["questions", questionIndex, "id"],
        });
      }
      seenQuestionIds.add(question.id);

      const seenOptionIds = new Set<string>();
      let freeTextOptionCount = 0;
      for (const [optionIndex, option] of question.options.entries()) {
        if (seenOptionIds.has(option.id)) {
          ctx.addIssue({
            code: z.ZodIssueCode.custom,
            message: "Option ids must be unique within one question",
            path: ["questions", questionIndex, "options", optionIndex, "id"],
          });
        }
        seenOptionIds.add(option.id);
        if (option.freeText) {
          freeTextOptionCount += 1;
          if (freeTextOptionCount > 1) {
            ctx.addIssue({
              code: z.ZodIssueCode.custom,
              message: "A question may declare at most one free-text option",
              path: [
                "questions",
                questionIndex,
                "options",
                optionIndex,
                "freeText",
              ],
            });
          }
        }
      }
    }
  });

export const askUserQuestionsAnswerSchema = z.object({
  questionId: z.string().trim().min(1).max(160),
  optionIds: z.array(z.string().trim().min(1).max(160)).max(129),
  // The persisted question determines whether this is exact editor text or a
  // legacy custom answer; normalize only after that trusted context is known.
  otherText: z.string().max(100000)
    .nullable()
    .optional(),
});

export const askUserQuestionsResultSchema = z.object({
  version: z.literal(1),
  outcome: z
    .enum(["skipped", "withdrawn", "issue_closed", "addressee_deleted"])
    .optional(),
  reason: z.string().trim().max(4000).nullable().optional(),
  answers: z.array(askUserQuestionsAnswerSchema).max(64),
  cancelled: z.literal(true).optional(),
  cancellationReason: z.string().trim().max(4000).nullable().optional(),
  expirationReason: z
    .enum(["superseded_by_comment", "superseded_by_newer_interaction"])
    .optional(),
  commentId: z.string().guid().nullable().optional(),
  // Set alongside expirationReason "superseded_by_newer_interaction": the id of
  // the newer sibling ask_user_questions that replaced this one (PAP-437).
  supersededByInteractionId: z.string().guid().nullable().optional(),
  summaryMarkdown: z.string().max(20000).nullable().optional(),
});

const requestConfirmationHrefSchema = z
  .string()
  .trim()
  .min(1)
  .max(2000)
  .refine((value) => {
    if (value.startsWith("#")) return true;
    if (value.startsWith("/")) return !value.startsWith("//");
    return /^https?:\/\//i.test(value);
  }, "href must be a root-relative path, same-page fragment, or http(s) URL");

const requestConfirmationTargetBaseSchema = z.object({
  label: z.string().trim().min(1).max(120).nullable().optional(),
  href: requestConfirmationHrefSchema.nullable().optional(),
});

export const requestConfirmationIssueDocumentTargetSchema =
  requestConfirmationTargetBaseSchema.extend({
    type: z.literal("issue_document"),
    issueId: z.string().guid().nullable().optional(),
    documentId: z.string().guid().nullable().optional(),
    key: issueDocumentKeySchema,
    revisionId: z.string().guid(),
    revisionNumber: z.number().int().positive().nullable().optional(),
  });

export const requestConfirmationCustomTargetSchema =
  requestConfirmationTargetBaseSchema.extend({
    type: z.literal("custom"),
    key: z.string().trim().min(1).max(120),
    revisionId: z.string().trim().min(1).max(255).nullable().optional(),
    revisionNumber: z.number().int().positive().nullable().optional(),
  });

export const requestConfirmationTargetSchema = z.discriminatedUnion("type", [
  requestConfirmationIssueDocumentTargetSchema,
  requestConfirmationCustomTargetSchema,
]);

export const requestConfirmationToolActionPayloadSchema = z.object({
  version: z.literal(1),
  actionRequestId: z.string().guid(),
  invocationId: z.string().guid(),
  toolName: z.string().trim().min(1).max(500),
  toolDisplayName: z.string().trim().min(1).max(500),
  connectionId: z.string().guid().nullable(),
  applicationId: z.string().guid().nullable(),
  appDisplayName: z.string().trim().min(1).max(500).nullable(),
  risk: z.enum(["read", "write", "destructive"]),
  rememberActionScope: z.string().trim().min(1).max(1000).optional(),
  previewMarkdown: z.string().trim().min(1).max(20000),
  argumentsSummaryJson: z.string().max(20000),
  argumentsHash: z.string().trim().min(1).max(255),
  expiresAt: z.string().datetime({ offset: true }),
});

export const requestConfirmationSecretProposalPayloadSchema = z.object({
  version: z.literal(1),
  proposalId: z.string().guid(),
  sourceSecretLabel: z.string().trim().min(1).max(500),
  configPath: z.string().trim().min(1).max(500),
  targetAgentId: z.string().guid(),
  targetAgentName: z.string().trim().min(1).max(500),
  justification: z.string().trim().min(1).max(20000),
  expiresAt: z.string().datetime({ offset: true }),
});

export const requestConfirmationPayloadSchema = z.object({
  version: z.literal(1),
  prompt: z.string().trim().min(1).max(1000),
  acceptLabel: z.string().trim().min(1).max(80).nullable().optional(),
  rejectLabel: z.string().trim().min(1).max(80).nullable().optional(),
  rejectRequiresReason: z.boolean().optional(),
  rejectReasonLabel: z.string().trim().min(1).max(160).nullable().optional(),
  allowDeclineReason: z.boolean().optional().default(true),
  declineReasonPlaceholder: z
    .string()
    .trim()
    .min(1)
    .max(240)
    .nullable()
    .optional(),
  detailsMarkdown: z.string().max(20000).nullable().optional(),
  supersedeOnUserComment: z.boolean().optional(),
  target: requestConfirmationTargetSchema.nullable().optional(),
  toolAction: requestConfirmationToolActionPayloadSchema.optional(),
  secretProposal: requestConfirmationSecretProposalPayloadSchema.optional(),
});

export const requestCheckboxConfirmationOptionSchema = z.object({
  id: z.string().trim().min(1).max(120),
  label: z.string().trim().min(1).max(120),
  description: z.string().trim().max(500).nullable().optional(),
});

export const requestCheckboxConfirmationPayloadSchema = z
  .object({
    version: z.literal(1),
    prompt: z.string().trim().min(1).max(1000),
    detailsMarkdown: z.string().max(20000).nullable().optional(),
    options: z
      .array(requestCheckboxConfirmationOptionSchema)
      .min(1)
      .max(REQUEST_CHECKBOX_CONFIRMATION_OPTION_LIMIT),
    defaultSelectedOptionIds: z
      .array(z.string().trim().min(1).max(120))
      .max(REQUEST_CHECKBOX_CONFIRMATION_OPTION_LIMIT)
      .optional()
      .default([]),
    minSelected: z.number().int().min(0).optional().default(0),
    maxSelected: z.number().int().min(0).nullable().optional(),
    acceptLabel: z.string().trim().min(1).max(80).nullable().optional(),
    rejectLabel: z.string().trim().min(1).max(80).nullable().optional(),
    rejectRequiresReason: z.boolean().optional(),
    rejectReasonLabel: z.string().trim().min(1).max(160).nullable().optional(),
    allowDeclineReason: z.boolean().optional().default(true),
    declineReasonPlaceholder: z
      .string()
      .trim()
      .min(1)
      .max(240)
      .nullable()
      .optional(),
    supersedeOnUserComment: z.boolean().optional(),
    target: requestConfirmationTargetSchema.nullable().optional(),
  })
  .superRefine((value, ctx) => {
    const optionIds = new Set<string>();
    for (const [index, option] of value.options.entries()) {
      if (optionIds.has(option.id)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "Option ids must be unique within one checkbox confirmation",
          path: ["options", index, "id"],
        });
      }
      optionIds.add(option.id);
    }

    const defaultSelectedOptionIds = new Set<string>();
    for (const [index, optionId] of value.defaultSelectedOptionIds.entries()) {
      if (defaultSelectedOptionIds.has(optionId)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "defaultSelectedOptionIds must be unique",
          path: ["defaultSelectedOptionIds", index],
        });
        continue;
      }
      defaultSelectedOptionIds.add(optionId);
      if (!optionIds.has(optionId)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message:
            "defaultSelectedOptionIds must reference existing option ids",
          path: ["defaultSelectedOptionIds", index],
        });
      }
    }

    const maxSelected = value.maxSelected ?? null;
    if (value.minSelected > value.options.length) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "minSelected cannot exceed the option count",
        path: ["minSelected"],
      });
    }
    if (value.defaultSelectedOptionIds.length < value.minSelected) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "defaultSelectedOptionIds must satisfy minSelected",
        path: ["defaultSelectedOptionIds"],
      });
    }
    if (maxSelected != null) {
      if (maxSelected < value.minSelected) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "maxSelected must be greater than or equal to minSelected",
          path: ["maxSelected"],
        });
      }
      if (maxSelected > value.options.length) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "maxSelected cannot exceed the option count",
          path: ["maxSelected"],
        });
      }
      if (value.defaultSelectedOptionIds.length > maxSelected) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "defaultSelectedOptionIds cannot exceed maxSelected",
          path: ["defaultSelectedOptionIds"],
        });
      }
    }
  });

export const requestConfirmationResumeFailureSchema = z.object({
  status: z.enum(["retrying", "needs_attention"]),
  errorCode: z.string().trim().min(1).max(120).nullable(),
  attempt: z.number().int().min(0).max(100),
  maxAttempts: z.number().int().min(0).max(100),
  runId: z.string().guid().nullable().optional(),
  retryRunId: z.string().guid().nullable().optional(),
  recoveryActionId: z.string().guid().nullable().optional(),
  updatedAt: z.string().trim().min(1).nullable().optional(),
});

export const requestConfirmationToolActionResultSchema = z.object({
  version: z.literal(1),
  rememberedAction: z.boolean().optional(),
  status: z.enum(["approved", "executing", "executed", "failed", "expired"]),
  errorCode: z.string().trim().min(1).max(120).nullable().optional(),
  errorMessage: z.string().trim().min(1).max(4000).nullable().optional(),
  // Populated on `executed` so the card can report the outcome (e.g. "Row 42
  // added") instead of a bare checkmark, with an optional deep-link when the
  // connector returns a URL (PAP-13745 §5 Executed / Peak-End).
  resultSummary: z.string().trim().min(1).max(4000).nullable().optional(),
  resultHref: z.string().trim().url().max(2000).nullable().optional(),
  updatedAt: z.string().datetime({ offset: true }),
});

export const requestConfirmationSecretProposalResultSchema = z.object({
  version: z.literal(1),
  status: z.enum(["executed", "failed", "rejected", "withdrawn", "expired"]),
  errorCode: z.string().trim().min(1).max(120).nullable().optional(),
  updatedAt: z.string().datetime({ offset: true }),
});

export const requestConfirmationResultSchema = z.object({
  version: z.literal(1),
  outcome: z.enum([
    "accepted",
    "rejected",
    "superseded_by_comment",
    "superseded_by_newer_request",
    "stale_target",
    "skipped",
    "withdrawn",
    "issue_closed",
    "addressee_deleted",
  ]),
  reason: z.string().trim().max(4000).nullable().optional(),
  commentId: z.string().guid().nullable().optional(),
  supersededByInteractionId: z.string().guid().nullable().optional(),
  staleTarget: requestConfirmationTargetSchema.nullable().optional(),
  resumeFailure: requestConfirmationResumeFailureSchema.nullable().optional(),
  toolAction: requestConfirmationToolActionResultSchema.optional(),
  secretProposal: requestConfirmationSecretProposalResultSchema.optional(),
});

export const requestCheckboxConfirmationResultSchema =
  requestConfirmationResultSchema
    .extend({
      selectedOptionIds: z
        .array(z.string().trim().min(1).max(120))
        .max(REQUEST_CHECKBOX_CONFIRMATION_OPTION_LIMIT)
        .optional(),
    })
    .superRefine((value, ctx) => {
      const selectedOptionIds = value.selectedOptionIds ?? [];
      const seenOptionIds = new Set<string>();
      for (const [index, optionId] of selectedOptionIds.entries()) {
        if (seenOptionIds.has(optionId)) {
          ctx.addIssue({
            code: z.ZodIssueCode.custom,
            message: "selectedOptionIds must be unique",
            path: ["selectedOptionIds", index],
          });
        }
        seenOptionIds.add(optionId);
      }
    });

export const requestItemVerdictValueSchema = z.enum([
  "approve",
  "reject",
  "defer",
]);

export const requestItemVerdictsItemSchema = z.object({
  id: z.string().trim().min(1).max(120),
  label: z.string().trim().min(1).max(120),
  description: z.string().trim().max(500).nullable().optional(),
  previewMarkdown: z.string().max(20000).nullable().optional(),
  href: requestConfirmationHrefSchema.nullable().optional(),
  attachmentId: z.string().guid().nullable().optional(),
});

export const requestItemVerdictsPayloadSchema = z
  .object({
    version: z.literal(1),
    prompt: z.string().trim().min(1).max(1000),
    detailsMarkdown: z.string().max(20000).nullable().optional(),
    items: z
      .array(requestItemVerdictsItemSchema)
      .min(1)
      .max(REQUEST_ITEM_VERDICTS_ITEM_LIMIT),
    verdicts: z
      .array(requestItemVerdictValueSchema)
      .min(2)
      .max(3)
      .optional()
      .default(["approve", "reject"]),
    requireReasonOn: z
      .array(requestItemVerdictValueSchema)
      .max(3)
      .optional()
      .default(["reject"]),
    reasonLabel: z.string().trim().min(1).max(160).nullable().optional(),
    allowBulkApprove: z.boolean().optional().default(true),
    supersedeOnUserComment: z.boolean().optional(),
    target: requestConfirmationTargetSchema.nullable().optional(),
  })
  .superRefine((value, ctx) => {
    const itemIds = new Set<string>();
    for (const [index, item] of value.items.entries()) {
      if (itemIds.has(item.id)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "Item ids must be unique within one item verdict request",
          path: ["items", index, "id"],
        });
      }
      itemIds.add(item.id);
    }

    const verdicts = new Set<string>();
    for (const [index, verdict] of value.verdicts.entries()) {
      if (verdicts.has(verdict)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "verdicts must be unique",
          path: ["verdicts", index],
        });
      }
      verdicts.add(verdict);
    }
    if (!verdicts.has("approve") || !verdicts.has("reject")) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "verdicts must include approve and reject; defer is optional",
        path: ["verdicts"],
      });
    }

    const reasonVerdicts = new Set<string>();
    for (const [index, verdict] of value.requireReasonOn.entries()) {
      if (reasonVerdicts.has(verdict)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "requireReasonOn must be unique",
          path: ["requireReasonOn", index],
        });
        continue;
      }
      reasonVerdicts.add(verdict);
      if (!verdicts.has(verdict)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "requireReasonOn must reference enabled verdicts",
          path: ["requireReasonOn", index],
        });
      }
    }
  });

export const requestItemVerdictsResultItemSchema = z
  .object({
    id: z.string().trim().min(1).max(120),
    verdict: requestItemVerdictValueSchema,
    reason: z.string().trim().max(4000).nullable().optional(),
    resolvedByUserId: z.string().trim().min(1).max(255).nullable().optional(),
    resolvedByAgentId: z.string().guid().nullable().optional(),
    resolvedByRunId: z.string().guid().nullable().optional(),
    resolvedAt: z.union([z.string().datetime(), z.date()]),
    commentId: z.string().guid().nullable().optional(),
  })
  .superRefine((value, ctx) => {
    if (!value.resolvedByUserId && !value.resolvedByAgentId) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "a user or agent resolver is required",
        path: ["resolvedByUserId"],
      });
    }
    if (value.resolvedByAgentId && !value.resolvedByRunId) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "resolvedByRunId is required for an agent resolver",
        path: ["resolvedByRunId"],
      });
    }
  });

export const requestItemVerdictsResultSchema = z
  .object({
    version: z.literal(1),
    outcome: z.enum([
      "resolved",
      "superseded_by_comment",
      "stale_target",
      "cancelled",
      "skipped",
      "withdrawn",
      "issue_closed",
      "addressee_deleted",
    ]),
    reason: z.string().trim().max(4000).nullable().optional(),
    complete: z.boolean(),
    items: z
      .array(requestItemVerdictsResultItemSchema)
      .max(REQUEST_ITEM_VERDICTS_ITEM_LIMIT),
    commentId: z.string().guid().nullable().optional(),
    staleTarget: requestConfirmationTargetSchema.nullable().optional(),
  })
  .superRefine((value, ctx) => {
    const itemIds = new Set<string>();
    for (const [index, item] of value.items.entries()) {
      if (itemIds.has(item.id)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "result item ids must be unique",
          path: ["items", index, "id"],
        });
      }
      itemIds.add(item.id);
    }
  });

const createIssueThreadInteractionCommon = {
  resolverPolicy: issueThreadInteractionResolverPolicySchema.optional(),
  addresseeAgentId: z.string().guid().nullable().optional(),
  addresseeUserId: z.string().trim().min(1).nullable().optional(),
};

// Validate dual representations on creation, not when reading historical rows.
// Otherwise a partial canonical form can hide required storage questions.
const createLegacyAskUserQuestionsPayloadSchema = askUserQuestionsPayloadSchema.superRefine((value, ctx) => {
  if (!value.questionSet) return;
  const shown = new Set(value.questionSet.questions.map((question) => question.id));
  const stored = new Set(value.questions.map((question) => question.id));
  if (shown.size !== stored.size || [...shown].some((id) => !stored.has(id))) {
    ctx.addIssue({
      code: z.ZodIssueCode.custom,
      path: ["questionSet", "questions"],
      message: "questionSet must present every questions entry with the same question IDs. Include choice questions as well as text questions; a partial form hides required answers.",
    });
  }
  const storedById = new Map(value.questions.map((question) => [question.id, question]));
  for (const [index, question] of value.questionSet.questions.entries()) {
    const storage = storedById.get(question.id);
    if (!storage) continue;
    const mismatch = (field: string) => ctx.addIssue({
      code: z.ZodIssueCode.custom,
      path: ["questionSet", "questions", index, field],
      message: `questionSet ${field} must match the corresponding questions entry.`,
    });
    if (question.prompt.trim() !== storage.prompt) mismatch("prompt");
    // An omitted storage flag adds no constraint; an explicit flag must agree.
    if (storage.required !== undefined && question.required !== storage.required) mismatch("required");
    const mode = question.answerMode === "multi_select" ? "multi" : "single";
    if (storage.selectionMode !== mode) mismatch("answerMode");
    if (question.answerMode === "text") {
      if (storage.options.length !== 1 || !storage.options[0].freeText) mismatch("answerMode");
    } else {
      // Text/custom-answer sentinels are storage compatibility, not visible choices.
      const choices = storage.options.filter((option) => !option.freeText);
      const canonical = new Map((question.options ?? []).map((option) => [option.id, option.label.trim()]));
      if (choices.length !== canonical.size || choices.some((option) => canonical.get(option.id) !== option.label)) mismatch("options");
      const allowsCustomAnswer = storage.allowOther === true || storage.options.some((option) => option.freeText);
      if (Boolean(question.customAnswer?.enabled) !== allowsCustomAnswer) mismatch("customAnswer");
    }
  }
});

const createAskUserQuestionsPayloadSchema = z.union([
  createLegacyAskUserQuestionsPayloadSchema,
  z.object({
    ...askUserQuestionsPayloadFields,
    // Do not discard an explicitly supplied conflicting compatibility form.
    questions: z.never().optional(),
    questionSet: paperclipQuestionSetPayloadSchema,
  }).transform(({ questions: _questions, ...value }): z.input<typeof createLegacyAskUserQuestionsPayloadSchema> => ({
    ...questionSetToAskUserQuestionsPayload(value.questionSet),
    ...value,
  })).pipe(createLegacyAskUserQuestionsPayloadSchema),
]);

export const createIssueThreadInteractionSchema = z.discriminatedUnion("kind", [
  z.object({
    ...createIssueThreadInteractionCommon,
    kind: z.literal("suggest_tasks"),
    idempotencyKey: z.string().trim().max(255).nullable().optional(),
    sourceCommentId: z.string().guid().nullable().optional(),
    sourceRunId: z.string().guid().nullable().optional(),
    title: z.string().trim().max(240).nullable().optional(),
    summary: z.string().trim().max(1000).nullable().optional(),
    continuationPolicy: issueThreadInteractionContinuationPolicySchema
      .optional()
      .default("wake_assignee"),
    payload: suggestTasksPayloadSchema,
  }),
  z.object({
    ...createIssueThreadInteractionCommon,
    kind: z.literal("ask_user_questions"),
    idempotencyKey: z.string().trim().max(255).nullable().optional(),
    sourceCommentId: z.string().guid().nullable().optional(),
    sourceRunId: z.string().guid().nullable().optional(),
    title: z.string().trim().max(240).nullable().optional(),
    summary: z.string().trim().max(1000).nullable().optional(),
    continuationPolicy: issueThreadInteractionContinuationPolicySchema
      .optional()
      .default("wake_assignee"),
    payload: createAskUserQuestionsPayloadSchema,
  }),
  z.object({
    ...createIssueThreadInteractionCommon,
    kind: z.literal("request_confirmation"),
    idempotencyKey: z.string().trim().max(255).nullable().optional(),
    sourceCommentId: z.string().guid().nullable().optional(),
    sourceRunId: z.string().guid().nullable().optional(),
    title: z.string().trim().max(240).nullable().optional(),
    summary: z.string().trim().max(1000).nullable().optional(),
    continuationPolicy: issueThreadInteractionContinuationPolicySchema
      .optional()
      .default("none"),
    payload: requestConfirmationPayloadSchema,
  }),
  z.object({
    ...createIssueThreadInteractionCommon,
    kind: z.literal("request_checkbox_confirmation"),
    idempotencyKey: z.string().trim().max(255).nullable().optional(),
    sourceCommentId: z.string().guid().nullable().optional(),
    sourceRunId: z.string().guid().nullable().optional(),
    title: z.string().trim().max(240).nullable().optional(),
    summary: z.string().trim().max(1000).nullable().optional(),
    continuationPolicy: issueThreadInteractionContinuationPolicySchema
      .optional()
      .default("wake_assignee"),
    payload: requestCheckboxConfirmationPayloadSchema,
  }),
  z.object({
    ...createIssueThreadInteractionCommon,
    kind: z.literal("request_item_verdicts"),
    idempotencyKey: z.string().trim().max(255).nullable().optional(),
    sourceCommentId: z.string().guid().nullable().optional(),
    sourceRunId: z.string().guid().nullable().optional(),
    title: z.string().trim().max(240).nullable().optional(),
    summary: z.string().trim().max(1000).nullable().optional(),
    continuationPolicy: issueThreadInteractionContinuationPolicySchema
      .optional()
      .default("wake_assignee"),
    payload: requestItemVerdictsPayloadSchema,
  }),
]);

export type CreateIssueThreadInteraction = z.infer<
  typeof createIssueThreadInteractionSchema
>;
export type CreateIssueThreadInteractionInput = z.input<
  typeof createIssueThreadInteractionSchema
>;

export const acceptIssueThreadInteractionSchema = z
  .object({
    rememberAction: z.boolean().optional(),
    selectedClientKeys: z
      .array(z.string().trim().min(1).max(120))
      .min(1)
      .max(50)
      .optional(),
    selectedOptionIds: z
      .array(z.string().trim().min(1).max(120))
      .max(REQUEST_CHECKBOX_CONFIRMATION_OPTION_LIMIT)
      .optional(),
  })
  .superRefine((value, ctx) => {
    const seenClientKeys = new Set<string>();
    for (const [index, clientKey] of (
      value.selectedClientKeys ?? []
    ).entries()) {
      if (seenClientKeys.has(clientKey)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "selectedClientKeys must be unique",
          path: ["selectedClientKeys", index],
        });
        continue;
      }
      seenClientKeys.add(clientKey);
    }

    const seenOptionIds = new Set<string>();
    for (const [index, optionId] of (value.selectedOptionIds ?? []).entries()) {
      if (seenOptionIds.has(optionId)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "selectedOptionIds must be unique",
          path: ["selectedOptionIds", index],
        });
        continue;
      }
      seenOptionIds.add(optionId);
    }
  });
export type AcceptIssueThreadInteraction = z.infer<
  typeof acceptIssueThreadInteractionSchema
>;

/** Records an agent's interpretation of a real user reply without widening resolver permissions. */
export const resolveConfirmationFromCommentSchema = z.object({
  commentId: z.string().guid(),
  decision: z.enum(["accept", "reject"]),
  selectedOptionIds: z.array(z.string().trim().min(1).max(120))
    .max(REQUEST_CHECKBOX_CONFIRMATION_OPTION_LIMIT).optional(),
  reason: z.string().trim().max(4000).optional(),
}).strict().superRefine((value, ctx) => {
  if (value.decision === "reject" && value.selectedOptionIds !== undefined) {
    ctx.addIssue({ code: z.ZodIssueCode.custom, path: ["selectedOptionIds"], message: "Selections apply only to acceptance" });
  }
  if (value.selectedOptionIds && new Set(value.selectedOptionIds).size !== value.selectedOptionIds.length) {
    ctx.addIssue({ code: z.ZodIssueCode.custom, path: ["selectedOptionIds"], message: "Selections must be unique" });
  }
});
export type ResolveConfirmationFromComment = z.infer<typeof resolveConfirmationFromCommentSchema>;

export const rejectIssueThreadInteractionSchema = z.object({
  reason: z.string().trim().max(4000).optional(),
});
export type RejectIssueThreadInteraction = z.infer<
  typeof rejectIssueThreadInteractionSchema
>;

export const cancelIssueThreadInteractionSchema = z.object({
  reason: z.string().trim().max(4000).optional(),
});
export type CancelIssueThreadInteraction = z.infer<
  typeof cancelIssueThreadInteractionSchema
>;

export const skipIssueThreadInteractionSchema = z.object({
  reason: z.string().trim().max(4000).optional(),
});
export type SkipIssueThreadInteraction = z.infer<
  typeof skipIssueThreadInteractionSchema
>;

export const withdrawIssueThreadInteractionSchema = z.object({
  reason: z.string().trim().max(4000).optional(),
});
export type WithdrawIssueThreadInteraction = z.infer<
  typeof withdrawIssueThreadInteractionSchema
>;

export const respondIssueThreadInteractionSchema = z.object({
  answers: z.array(askUserQuestionsAnswerSchema).max(20),
  summaryMarkdown: multilineTextSchema
    .pipe(z.string().max(20000))
    .nullable()
    .optional(),
});
export type RespondIssueThreadInteraction = z.infer<
  typeof respondIssueThreadInteractionSchema
>;

export const submitIssueThreadInteractionVerdictsSchema = z
  .object({
    verdicts: z
      .array(
        z.object({
          id: z.string().trim().min(1).max(120),
          verdict: requestItemVerdictValueSchema,
          reason: z.string().trim().max(4000).nullable().optional(),
        }),
      )
      .min(1)
      .max(REQUEST_ITEM_VERDICTS_ITEM_LIMIT),
  })
  .superRefine((value, ctx) => {
    const itemIds = new Set<string>();
    for (const [index, verdict] of value.verdicts.entries()) {
      if (itemIds.has(verdict.id)) {
        ctx.addIssue({
          code: z.ZodIssueCode.custom,
          message: "verdict item ids must be unique",
          path: ["verdicts", index, "id"],
        });
      }
      itemIds.add(verdict.id);
    }
  });
export type SubmitIssueThreadInteractionVerdicts = z.infer<
  typeof submitIssueThreadInteractionVerdictsSchema
>;

export const linkIssueApprovalSchema = z.object({
  approvalId: z.string().guid(),
});

export type LinkIssueApproval = z.infer<typeof linkIssueApprovalSchema>;

export const createIssueAttachmentMetadataSchema = z.object({
  issueCommentId: z.string().guid().optional().nullable(),
});

export type CreateIssueAttachmentMetadata = z.infer<
  typeof createIssueAttachmentMetadataSchema
>;

export const ISSUE_DOCUMENT_FORMATS = ["markdown"] as const;

export const issueDocumentFormatSchema = z.enum(ISSUE_DOCUMENT_FORMATS);

export const upsertIssueDocumentSchema = z.object({
  title: z.string().trim().max(200).nullable().optional(),
  format: issueDocumentFormatSchema,
  body: multilineTextSchema.pipe(z.string().max(524288)),
  changeSummary: z.string().trim().max(500).nullable().optional(),
  baseRevisionId: z.string().guid().nullable().optional(),
});

export const restoreIssueDocumentRevisionSchema = z.object({});

export type IssueDocumentFormat = z.infer<typeof issueDocumentFormatSchema>;
export type UpsertIssueDocument = z.infer<typeof upsertIssueDocumentSchema>;
export type RestoreIssueDocumentRevision = z.infer<
  typeof restoreIssueDocumentRevisionSchema
>;