import { createHash, randomUUID } from "node:crypto";
import { mkdtemp, realpath, rm } from "node:fs/promises";
import fs from "node:fs/promises";
import { tmpdir } from "node:os";
import path from "node:path";
import { and, eq, inArray } from "drizzle-orm";
import { drizzle } from "drizzle-orm/postgres-js";
import { afterAll, beforeAll, expect, it, vi } from "vitest";
import { agents, authUsers, companies, companyMemberships, createDb, executionWorkspaceRepositoryAccess,
  executionWorkspaces, heartbeatRuns, issues, projects, projectAccessMembers, EMBEDDED_POSTGRES_TEST_TIMEOUT_MS } from "@paperclipai/db";
import { executionWorkspaceRepositoryService } from "../services/execution-workspace-repositories.js";
import { runRetainsIssueIdentity } from "../services/task-repository-acquisition.js";
import { authorizationService, type AuthorizationActor } from "../services/authorization.js";
import { mergeCoalescedContextSnapshot } from "../services/heartbeat/run-preparation.js";
import { startEmbeddedPostgresTestDatabase } from "./helpers/embedded-postgres.js";

let database: Awaited<ReturnType<typeof startEmbeddedPostgresTestDatabase>>;
let db: ReturnType<typeof createDb>;
let cwd: string;
const companyId = randomUUID(), agentId = randomUUID(), userId = randomUUID(), issueId = randomUUID(), projectId = randomUUID();
const runIds = Array.from({ length: 64 }, () => randomUUID());
let workspaceId: string;

beforeAll(async () => {
  vi.stubEnv("PAPERCLIP_ISSUE_PRIVACY_MODE", "enforce");
  database = await startEmbeddedPostgresTestDatabase("root-reader-query-");
  db = createDb(database.connectionString);
  cwd = await realpath(await mkdtemp(path.join(tmpdir(), "root-reader-query-")));
  await db.insert(companies).values({ id: companyId, name: "Retained readers", issuePrefix: "RRQ" });
  await db.insert(authUsers).values({ id: userId, name: "Sponsor", email: `${userId}@example.test`, emailVerified: true, createdAt: new Date(), updatedAt: new Date() });
  await db.insert(agents).values({ id: agentId, companyId, name: "Worker", adapterType: "process" });
  await db.insert(companyMemberships).values([
    { companyId, principalType: "user", principalId: userId, membershipRole: "operator", status: "active" },
    { companyId, principalType: "agent", principalId: agentId, membershipRole: "member", status: "active" },
  ]);
  await db.insert(projects).values({ id: projectId, companyId, name: "Source" });
  const [workspace] = await db.insert(executionWorkspaces).values({ companyId, projectId, cwd, name: "Task source", mode: "shared_workspace", strategyType: "operator_directory" }).returning();
  workspaceId = workspace.id;
  await db.insert(issues).values({ id: issueId, companyId, projectId, title: "Task", assigneeAgentId: agentId, executionWorkspaceId: workspaceId });
  await db.insert(heartbeatRuns).values(runIds.map(id => ({ id, companyId, agentId, responsibleUserId: userId,
    status: "succeeded", contextSnapshot: { issueId }, resultJson: { unusedPayload: "x".repeat(65536) } })));
  const rootKey = createHash("sha256").update(cwd).digest("hex");
  await db.insert(executionWorkspaceRepositoryAccess).values(runIds.map(scopeId => ({ companyId, rootKey,
    canonicalCwd: cwd, kind: "reader" as const, scopeId, issueId, agentId, responsibleUserId: userId })));
}, EMBEDDED_POSTGRES_TEST_TIMEOUT_MS);

afterAll(async () => {
  vi.unstubAllEnvs();
  await db?.$client.end({ timeout: 0 });
  await database?.cleanup();
  if (cwd) await rm(cwd, { recursive: true, force: true });
});

const input = () => ({ companyId, issueId, workspaceId, cwd, agentId, runId: runIds[0] });

it("does no historical reader work and keeps query/path counts constant as peer history grows", async () => {
  const queries: string[] = [];
  const recorded = drizzle(db.$client, { schema: db._.fullSchema, logger: { logQuery: query => queries.push(query) } }) as unknown as typeof db;
  const service = executionWorkspaceRepositoryService(recorded);
  const paths = vi.spyOn(fs, "realpath");
  try {
    await service.assertPublicationAllowed(input());
    const smallQueries = queries.length, smallPaths = paths.mock.calls.length;
    queries.length = 0; paths.mockClear();
    const sourceIds = Array.from({ length: 1200 }, () => randomUUID());
    await db.insert(executionWorkspaces).values(sourceIds.map(id => ({ id, companyId, projectId, cwd,
      sourceIssueId: issueId, name: "Historical source", mode: "shared_workspace", strategyType: "operator_directory" })));
    await db.insert(executionWorkspaceRepositoryAccess).values(sourceIds.map(scopeId => ({ companyId,
      canonicalCwd: cwd, rootKey: createHash("sha256").update(cwd).digest("hex"), kind: "reader" as const, scopeId,
      issueId: randomUUID(), agentId: randomUUID(), responsibleUserId: "deleted-user" })));
    await service.assertPublicationAllowed(input());
    expect(queries).toHaveLength(smallQueries);
    expect(paths.mock.calls).toHaveLength(smallPaths);
    expect(queries.every(query => !query.includes('"execution_workspace_repository_access"')
      && !query.includes('"execution_workspace_repository_roots"'))).toBe(true);
    const runs = queries.filter(query => query.includes('from "heartbeat_runs"'));
    expect(runs.length).toBeGreaterThan(0);
    expect(runs.every(query => !query.includes('"result_json"') && !query.includes('"runner_profile_json"'))).toBe(true);
  } finally { paths.mockRestore(); }
});

it("rechecks the current run identity while ignoring broken historical readers", async () => {
  const service = executionWorkspaceRepositoryService(db);
  await db.update(heartbeatRuns).set({ contextSnapshot: { issueId: randomUUID() } }).where(eq(heartbeatRuns.id, runIds[31]));
  await expect(service.assertPublicationAllowed(input())).resolves.toBeUndefined();
  await expect(service.assertPublicationAllowed({ ...input(), runId: randomUUID() })).rejects.toThrow("identity");
  const [foreign] = await db.insert(companies).values({ name: "Foreign current run", issuePrefix: "FCR" }).returning();
  try {
    await db.update(heartbeatRuns).set({ companyId: foreign.id }).where(eq(heartbeatRuns.id, runIds[0]));
    await expect(service.assertPublicationAllowed(input())).rejects.toThrow("identity");
  } finally {
    await db.update(heartbeatRuns).set({ companyId, contextSnapshot: { issueId } }).where(eq(heartbeatRuns.id, runIds[0]));
  }
});

it("preserves immutable task identity after another wake coalesces into the current run", async () => {
  const otherIssueId = randomUUID();
  const context = mergeCoalescedContextSnapshot({ issueId, taskId: issueId }, { issueId: otherIssueId, taskId: otherIssueId });
  expect(runRetainsIssueIdentity({ nativeIssueId: null, issueId, contextSnapshot: context }, issueId)).toBe(true);
  expect(runRetainsIssueIdentity({ nativeIssueId: issueId, issueId: otherIssueId, contextSnapshot: context }, issueId)).toBe(true);
  expect(runRetainsIssueIdentity({ nativeIssueId: null, issueId: otherIssueId, contextSnapshot: context }, issueId)).toBe(false);
  const service = executionWorkspaceRepositoryService(db);
  try {
    await db.update(heartbeatRuns).set({ issueId, contextSnapshot: context }).where(eq(heartbeatRuns.id, runIds[0]));
    await expect(service.assertPublicationAllowed(input())).resolves.toBeUndefined();
  } finally {
    await db.update(heartbeatRuns).set({ issueId: null, contextSnapshot: { issueId } }).where(eq(heartbeatRuns.id, runIds[0]));
  }
});

it("preserves each actor's saved policy in batched read decisions", async () => {
  const actor: AuthorizationActor = { type: "agent", source: "agent_jwt", companyId, agentId,
    runId: runIds[0], onBehalfOfUserId: userId };
  const policyRunId = runIds[31];
  const actors = [actor, { ...actor, runId: policyRunId }, { ...actor, runId: runIds[0].toUpperCase() },
    { ...actor, runId: randomUUID() }];
  const resources = [{ type: "project" as const, companyId, projectId }, { type: "company" as const, companyId }];
  const service = authorizationService(db);
  try {
    await db.update(heartbeatRuns).set({ contextSnapshot: { issueId, executionPolicy: { trustPreset: "unsupported" } } })
      .where(eq(heartbeatRuns.id, policyRunId));
    const decisions = await service.decideReadsForActors(actors, resources);
    for (const [index, candidate] of actors.entries()) {
      for (const [resourceIndex, resource] of resources.entries()) {
        expect(decisions[index][resourceIndex]).toEqual(await service.decide({ actor: { ...candidate }, resource,
          action: resource.type === "project" ? "project:read" : "company_scope:read" }));
      }
    }
    expect(decisions[0][0].allowed).toBe(true);
    expect(decisions[1][0].allowed).toBe(false);
  } finally {
    await db.update(heartbeatRuns).set({ contextSnapshot: { issueId } }).where(eq(heartbeatRuns.id, policyRunId));
  }
  expect((await service.decideReadsForActors(actors, resources))[1][0].allowed).toBe(true);
});

it("reloads project grants on every publication attempt", async () => {
  const service = executionWorkspaceRepositoryService(db);
  await db.update(projects).set({ visibility: "private" }).where(eq(projects.id, projectId));
  const grants = await db.insert(projectAccessMembers).values([
    { companyId, projectId, subjectType: "agent", subjectId: agentId },
    { companyId, projectId, subjectType: "user", subjectId: userId },
  ]).returning();
  try {
    await expect(service.assertPublicationAllowed(input())).resolves.toBeUndefined();
    await db.delete(projectAccessMembers).where(and(eq(projectAccessMembers.projectId, projectId), eq(projectAccessMembers.subjectType, "user")));
    await expect(service.assertPublicationAllowed(input())).rejects.toThrow();
  } finally {
    await db.delete(projectAccessMembers).where(inArray(projectAccessMembers.id, grants.map(grant => grant.id)));
    await db.update(projects).set({ visibility: "open" }).where(eq(projects.id, projectId));
  }
});

it("keeps supplied membership snapshots separate from fresh database snapshots", async () => {
  const actor: AuthorizationActor = { type: "agent", source: "agent_jwt", companyId, agentId,
    runId: runIds[0], onBehalfOfUserId: userId };
  const supplied = { ...actor, onBehalfOfMemberships: [{ companyId, membershipRole: "operator", status: "active" }] };
  const service = authorizationService(db);
  const resource = { type: "company" as const, companyId };
  await db.update(companyMemberships).set({ status: "inactive" }).where(and(eq(companyMemberships.companyId, companyId), eq(companyMemberships.principalId, userId)));
  try {
    for (const candidates of [[supplied, actor], [actor, supplied]]) {
      const decisions = await service.decideReadsForActors(candidates, [resource]);
      for (let index = 0; index < candidates.length; index++) {
        expect(decisions[index][0]).toEqual(await service.decide({ actor: { ...candidates[index] }, action: "company_scope:read", resource }));
        expect(decisions[index][0].code).toBe(candidates[index] === supplied
          ? "RESPONSIBLE_USER_UNAUTHORIZED" : "RESPONSIBLE_USER_UNAVAILABLE");
      }
    }
  } finally {
    await db.update(companyMemberships).set({ status: "active" }).where(and(eq(companyMemberships.companyId, companyId), eq(companyMemberships.principalId, userId)));
  }
});

it("does not canonicalize filesystem paths or mutate a ledger for empty-repository admission", async () => {
  const queries: string[] = [];
  const recorded = drizzle(db.$client, { schema: db._.fullSchema, logger: { logQuery: query => queries.push(query) } }) as unknown as typeof db;
  const paths = vi.spyOn(fs, "realpath");
  try {
    await expect(executionWorkspaceRepositoryService(recorded).prepareForAdmission({ ...input(), responsibleUserId: userId })).resolves.toEqual([]);
    expect(paths).not.toHaveBeenCalled();
    expect(queries.every(query => !query.includes('"execution_workspace_repository_access"')
      && !query.includes('"execution_workspace_repository_roots"'))).toBe(true);
  } finally { paths.mockRestore(); }
});