import express from "express";
import request from "supertest";
import { beforeEach, describe, expect, it, vi } from "vitest";

const issueId = "11111111-1111-4111-8111-111111111111";
const companyId = "22222222-2222-4222-8222-222222222222";

const mockIssueService = vi.hoisted(() => ({
  getById: vi.fn(),
}));

const mockDocumentsService = vi.hoisted(() => ({
  listIssueDocuments: vi.fn(),
  listIssueDocumentRevisions: vi.fn(),
  restoreIssueDocumentRevision: vi.fn(),
}));

const mockAccessService = vi.hoisted(() => ({
  canUser: vi.fn(),
  hasPermission: vi.fn(),
}));

const mockAgentService = vi.hoisted(() => ({
  getById: vi.fn(),
}));

const mockLogActivity = vi.hoisted(() => vi.fn(async () => undefined));

vi.mock("../services/index.js", () => ({
  accessService: () => mockAccessService,
  agentService: () => mockAgentService,
  documentService: () => mockDocumentsService,
  executionWorkspaceService: () => ({}),
  feedbackService: () => ({}),
  goalService: () => ({}),
  heartbeatService: () => ({
    wakeup: vi.fn(async () => undefined),
    reportRunActivity: vi.fn(async () => undefined),
  }),
  instanceSettingsService: () => ({
    getExperimental: vi.fn(async () => ({})),
    getGeneral: vi.fn(async () => ({ feedbackDataSharingPreference: "prompt" })),
  }),
  issueApprovalService: () => ({}),
  issueReferenceService: () => ({
    deleteDocumentSource: async () => undefined,
    diffIssueReferenceSummary: () => ({
      addedReferencedIssues: [],
      removedReferencedIssues: [],
      currentReferencedIssues: [],
    }),
    emptySummary: () => ({ outbound: [], inbound: [] }),
    listIssueReferenceSummary: async () => ({ outbound: [], inbound: [] }),
    syncComment: async () => undefined,
    syncDocument: async () => undefined,
    syncIssue: async () => undefined,
  }),
  issueService: () => mockIssueService,
  logActivity: mockLogActivity,
  projectService: () => ({}),
  routineService: () => ({
    syncRunStatusForIssue: vi.fn(async () => undefined),
  }),
  workProductService: () => ({}),
}));

function registerModuleMocks() {
  vi.doMock("../services/index.js", () => ({
    accessService: () => mockAccessService,
    agentService: () => mockAgentService,
    documentService: () => mockDocumentsService,
    executionWorkspaceService: () => ({}),
    feedbackService: () => ({}),
    goalService: () => ({}),
    heartbeatService: () => ({
      wakeup: vi.fn(async () => undefined),
      reportRunActivity: vi.fn(async () => undefined),
    }),
    instanceSettingsService: () => ({
      getExperimental: vi.fn(async () => ({})),
      getGeneral: vi.fn(async () => ({ feedbackDataSharingPreference: "prompt" })),
    }),
    issueApprovalService: () => ({}),
    issueReferenceService: () => ({
      deleteDocumentSource: async () => undefined,
      diffIssueReferenceSummary: () => ({
        addedReferencedIssues: [],
        removedReferencedIssues: [],
        currentReferencedIssues: [],
      }),
      emptySummary: () => ({ outbound: [], inbound: [] }),
      listIssueReferenceSummary: async () => ({ outbound: [], inbound: [] }),
      syncComment: async () => undefined,
      syncDocument: async () => undefined,
      syncIssue: async () => undefined,
    }),
    issueService: () => mockIssueService,
    logActivity: mockLogActivity,
    projectService: () => ({}),
    routineService: () => ({
      syncRunStatusForIssue: vi.fn(async () => undefined),
    }),
    workProductService: () => ({}),
  }));
}

async function createApp() {
  const [{ issueRoutes }, { errorHandler }] = await Promise.all([
    vi.importActual<typeof import("../routes/issues.js")>("../routes/issues.js"),
    vi.importActual<typeof import("../middleware/index.js")>("../middleware/index.js"),
  ]);
  const app = express();
  app.use(express.json());
  app.use((req, _res, next) => {
    (req as any).actor = {
      type: "board",
      userId: "board-user",
      companyIds: [companyId],
      source: "local_implicit",
      isInstanceAdmin: false,
    };
    next();
  });
  app.use("/api", issueRoutes({} as any, {} as any));
  app.use(errorHandler);
  return app;
}

describe("issue document revision routes", () => {
  beforeEach(() => {
    vi.resetModules();
    vi.doUnmock("../services/routines.js");
    vi.doUnmock("../routes/issues.js");
    vi.doUnmock("../middleware/index.js");
    registerModuleMocks();
    vi.resetAllMocks();
    mockIssueService.getById.mockResolvedValue({
      id: issueId,
      companyId,
      identifier: "PAP-881",
      title: "Document revisions",
      status: "in_progress",
    });
    mockDocumentsService.listIssueDocuments.mockResolvedValue([
      {
        id: "document-1",
        companyId,
        issueId,
        key: "plan",
        title: "Plan",
        format: "markdown",
        body: "# Plan",
        latestRevisionId: "revision-2",
        latestRevisionNumber: 2,
        createdByAgentId: null,
        createdByUserId: "board-user",
        updatedByAgentId: null,
        updatedByUserId: "board-user",
        createdAt: new Date("2026-03-26T12:00:00.000Z"),
        updatedAt: new Date("2026-03-26T12:10:00.000Z"),
      },
    ]);
    mockDocumentsService.listIssueDocumentRevisions.mockResolvedValue([
      {
        id: "revision-2",
        companyId,
        documentId: "document-1",
        issueId,
        key: "plan",
        revisionNumber: 2,
        title: "Plan v2",
        format: "markdown",
        body: "# Two",
        changeSummary: null,
        createdByAgentId: null,
        createdByUserId: "board-user",
        createdAt: new Date("2026-03-26T12:00:00.000Z"),
      },
    ]);
    mockDocumentsService.restoreIssueDocumentRevision.mockResolvedValue({
      restoredFromRevisionId: "revision-1",
      restoredFromRevisionNumber: 1,
      document: {
        id: "document-1",
        companyId,
        issueId,
        key: "plan",
        title: "Plan v1",
        format: "markdown",
        body: "# One",
        latestRevisionId: "revision-3",
        latestRevisionNumber: 3,
        createdByAgentId: null,
        createdByUserId: "board-user",
        updatedByAgentId: null,
        updatedByUserId: "board-user",
        createdAt: new Date("2026-03-26T12:00:00.000Z"),
        updatedAt: new Date("2026-03-26T12:10:00.000Z"),
      },
    });
    mockLogActivity.mockResolvedValue(undefined);
  });

  it("returns revision snapshots including title and format", async () => {
    const res = await request(await createApp()).get(`/api/issues/${issueId}/documents/plan/revisions`);

    expect(res.status).toBe(200);
    expect(res.body).toEqual([
      expect.objectContaining({
        revisionNumber: 2,
        title: "Plan v2",
        format: "markdown",
        body: "# Two",
      }),
    ]);
  });

  it("filters system documents by default on the document list route", async () => {
    const res = await request(await createApp()).get(`/api/issues/${issueId}/documents`);

    expect(res.status).toBe(200);
    expect(mockDocumentsService.listIssueDocuments).toHaveBeenCalledWith(issueId, { includeSystem: false });
    expect(res.body).toEqual([expect.objectContaining({ key: "plan" })]);
  });

  it("passes includeSystem=true through for debug document listing", async () => {
    await request(await createApp()).get(`/api/issues/${issueId}/documents?includeSystem=true`);

    expect(mockDocumentsService.listIssueDocuments).toHaveBeenCalledWith(issueId, { includeSystem: true });
  });

  it("restores a revision through the append-only route and logs the action", async () => {
    const res = await request(await createApp())
      .post(`/api/issues/${issueId}/documents/plan/revisions/revision-1/restore`)
      .send({});

    expect(res.status).toBe(200);
    expect(mockDocumentsService.restoreIssueDocumentRevision).toHaveBeenCalledWith({
      issueId,
      key: "plan",
      revisionId: "revision-1",
      createdByAgentId: null,
      createdByUserId: "board-user",
    });
    expect(mockLogActivity).toHaveBeenCalledWith(
      expect.anything(),
      expect.objectContaining({
        action: "issue.document_restored",
        details: expect.objectContaining({
          key: "plan",
          restoredFromRevisionId: "revision-1",
          restoredFromRevisionNumber: 1,
          revisionNumber: 3,
        }),
      }),
    );
    expect(res.body).toEqual(expect.objectContaining({
      key: "plan",
      title: "Plan v1",
      latestRevisionNumber: 3,
    }));
  });

  it("rejects invalid document keys before attempting restore", async () => {
    const res = await request(await createApp())
      .post(`/api/issues/${issueId}/documents/INVALID KEY/revisions/revision-1/restore`)
      .send({});

    expect(res.status).toBe(400);
    expect(mockDocumentsService.restoreIssueDocumentRevision).not.toHaveBeenCalled();
  });
});