const fs = require("node:fs/promises");
const os = require("node:os");
const path = require("node:path");

const Fastify = require("fastify");

const { AppError } = require("../../../src/utils/AppError");
const { registerInvoicePoolReadRoutes } = require("../../../src/routes/invoicePool/read");
const { signPayload, verifyToken } = require("../../../src/utils/signedUrl");

const INVOICE_ID = "11111111-1111-4111-8111-111111111111";
const ACTOR_ID = "22222222-2222-4222-8222-222222222222";
const JWT_SECRET = "synthetic-test-secret";

async function buildApp({ auditFailure = null, invoiceOverrides = {}, employee = null, pendingTask = null } = {}) {
  const storageDir = await fs.mkdtemp(path.join(os.tmpdir(), "hyb-oa-invoice-file-"));
  const fileContents = "%PDF synthetic\n%%EOF\n";
  await fs.writeFile(path.join(storageDir, "invoice.pdf"), fileContents);

  const prisma = {
    invoicePool: {
      findUnique: vi.fn().mockResolvedValue({
        id: INVOICE_ID,
        owner_employee_id: ACTOR_ID,
        uploaded_by_employee_id: ACTOR_ID,
        linked_reimbursement_id: null,
        linked_reimbursement: null,
        storage_path: "invoice.pdf",
        mime_type: "application/pdf",
        original_name: "住宿电子普通发票.pdf",
        file_size: Buffer.byteLength(fileContents),
        ...invoiceOverrides,
      }),
    },
    workflowTask: {
      findFirst: vi.fn().mockResolvedValue(pendingTask),
    },
    auditLog: {
      create: auditFailure
        ? vi.fn().mockRejectedValue(auditFailure)
        : vi.fn().mockResolvedValue({ id: "audit-1" }),
    },
  };

  const app = Fastify();
  app.decorate("prisma", prisma);
  app.decorate("config", {
    jwtSecret: JWT_SECRET,
    storageDir,
    appOrigin: "https://oa.hyinda.com",
    signedUrlTtlSeconds: 600,
  });
  app.decorate("authenticate", async (request) => {
    if (!request.headers.authorization) {
      throw new AppError({ code: "AUTH_001", message: "未登录", statusCode: 401 });
    }
    request.employee = employee ?? {
      id: ACTOR_ID,
      roleCodes: ["finance"],
      permissionCodes: [],
    };
  });
  app.decorate("hasPermission", () => false);
  app.decorate("requirePermission", () => async () => {});
  app.setErrorHandler((error, request, reply) => {
    if (error instanceof AppError) {
      return reply.status(error.statusCode).send({
        requestId: request.id,
        error: { code: error.code, message: error.message, details: error.details ?? {} },
      });
    }
    return reply.status(500).send({
      requestId: request.id,
      error: { code: "SYS_001", message: "服务器内部错误", details: {} },
    });
  });
  await app.register(registerInvoicePoolReadRoutes, { prefix: "/api" });
  return { app, prisma, storageDir, fileContents };
}

describe("GET /api/invoice-pool/:id/file", () => {
  it("returns a Chinese PDF name through a safe inline Content-Disposition", async () => {
    const { app, prisma, storageDir } = await buildApp();
    const exp = Date.now() + 60_000;
    const token = signPayload({ invoiceId: INVOICE_ID, actorId: ACTOR_ID, exp }, JWT_SECRET);

    try {
      const response = await app.inject({
        method: "GET",
        url: `/api/invoice-pool/${INVOICE_ID}/file?token=${encodeURIComponent(token)}`,
      });

      expect(response.statusCode).toBe(200);
      expect(response.headers["content-type"]).toContain("application/pdf");
      expect(response.headers["content-disposition"]).toBe(
        "inline; filename=\"attachment.pdf\"; filename*=UTF-8''%E4%BD%8F%E5%AE%BF%E7%94%B5%E5%AD%90%E6%99%AE%E9%80%9A%E5%8F%91%E7%A5%A8.pdf",
      );
      expect(response.headers["content-disposition"]).not.toContain("住宿电子普通发票");
      expect(prisma.auditLog.create).toHaveBeenCalledWith(
        expect.objectContaining({ data: expect.objectContaining({ action: "INVOICE_FILE_DOWNLOADED" }) }),
      );
    } finally {
      await app.close();
      await fs.rm(storageDir, { recursive: true, force: true });
    }
  });

  it("fails closed when the file access audit cannot be written", async () => {
    const { app, storageDir } = await buildApp({ auditFailure: new Error("synthetic audit outage") });
    const exp = Date.now() + 60_000;
    const token = signPayload({ invoiceId: INVOICE_ID, actorId: ACTOR_ID, exp }, JWT_SECRET);

    try {
      const response = await app.inject({
        method: "GET",
        url: `/api/invoice-pool/${INVOICE_ID}/file?token=${encodeURIComponent(token)}`,
      });

      expect(response.statusCode).toBe(500);
      expect(response.json().error.code).toBe("SYS_001");
      expect(response.body).not.toContain("%PDF synthetic");
    } finally {
      await app.close();
      await fs.rm(storageDir, { recursive: true, force: true });
    }
  });
});

describe("POST /api/invoice-pool/:id/signed-url", () => {
  it("issues an object-bound URL for at most 120 seconds with preview metadata", async () => {
    const { app, prisma, storageDir, fileContents } = await buildApp();
    const issuedBefore = Date.now();

    try {
      const response = await app.inject({
        method: "POST",
        url: `/api/invoice-pool/${INVOICE_ID}/signed-url`,
        headers: { authorization: "Bearer test", "content-type": "application/json" },
        payload: {},
      });

      expect(response.statusCode).toBe(200);
      expect(response.json().data).toEqual(expect.objectContaining({
        signedUrl: expect.stringMatching(/^https:\/\/oa\.hyinda\.com\/api\/invoice-pool\//),
        originalName: "住宿电子普通发票.pdf",
        mimeType: "application/pdf",
        fileSize: Buffer.byteLength(fileContents),
      }));
      const url = new URL(response.json().data.signedUrl);
      const verified = verifyToken(url.searchParams.get("token"), JWT_SECRET);
      expect(verified).toEqual(expect.objectContaining({
        ok: true,
        payload: expect.objectContaining({ invoiceId: INVOICE_ID, actorId: ACTOR_ID }),
      }));
      expect(verified.payload.exp).toBeGreaterThanOrEqual(issuedBefore + 119_000);
      expect(verified.payload.exp).toBeLessThanOrEqual(Date.now() + 120_000);
      expect(prisma.auditLog.create).toHaveBeenCalledWith(expect.objectContaining({
        data: expect.objectContaining({
          action: "INVOICE_SIGNED_URL_ISSUED",
          actor_id: ACTOR_ID,
          target_id: INVOICE_ID,
        }),
      }));
    } finally {
      await app.close();
      await fs.rm(storageDir, { recursive: true, force: true });
    }
  });

  it("requires authentication before issuing a signed URL", async () => {
    const { app, prisma, storageDir } = await buildApp();

    try {
      const response = await app.inject({
        method: "POST",
        url: `/api/invoice-pool/${INVOICE_ID}/signed-url`,
        payload: {},
      });

      expect(response.statusCode).toBe(401);
      expect(prisma.invoicePool.findUnique).not.toHaveBeenCalled();
    } finally {
      await app.close();
      await fs.rm(storageDir, { recursive: true, force: true });
    }
  });

  it("allows the current pending approver without granting invoice management permission", async () => {
    const approverId = "33333333-3333-4333-8333-333333333333";
    const linkedReimbursementId = "44444444-4444-4444-8444-444444444444";
    const { app, prisma, storageDir } = await buildApp({
      employee: { id: approverId, roleCodes: ["manager"], permissionCodes: [] },
      invoiceOverrides: {
        owner_employee_id: ACTOR_ID,
        uploaded_by_employee_id: ACTOR_ID,
        linked_reimbursement_id: linkedReimbursementId,
        linked_reimbursement: { owner_id: ACTOR_ID, submitter_id: ACTOR_ID },
      },
      pendingTask: { id: "synthetic-pending-task" },
    });

    try {
      const response = await app.inject({
        method: "POST",
        url: `/api/invoice-pool/${INVOICE_ID}/signed-url`,
        headers: { authorization: "Bearer test", "content-type": "application/json" },
        payload: {},
      });

      expect(response.statusCode).toBe(200);
      expect(prisma.workflowTask.findFirst).toHaveBeenCalledWith(expect.objectContaining({
        where: expect.objectContaining({ status: "pending" }),
      }));
      expect(prisma.auditLog.create).toHaveBeenCalledWith(expect.objectContaining({
        data: expect.objectContaining({ actor_id: approverId, action: "INVOICE_SIGNED_URL_ISSUED" }),
      }));
    } finally {
      await app.close();
      await fs.rm(storageDir, { recursive: true, force: true });
    }
  });
});