const ExcelJS = require("exceljs");
const Fastify = require("fastify");

const exportsRoutes = require("../../../src/routes/exports");
const { AppError } = require("../../../src/utils/AppError");

const ADMIN_ID = "aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa";

function buildPayslipRow() {
  return {
    id: "payslip-1",
    employee_id: "employee-1",
    pay_month: new Date("2026-04-01T00:00:00.000Z"),
    status: "issued",
    gross_amount: "10000.00",
    deduction_amount: "600.00",
    net_amount: "9400.00",
    issued_at: new Date("2026-04-30T09:00:00.000Z"),
    created_at: new Date("2026-04-30T08:00:00.000Z"),
    created_by: ADMIN_ID,
    updated_at: new Date("2026-04-30T09:00:00.000Z"),
    updated_by: ADMIN_ID,
  };
}

async function buildApp({
  actor = { id: ADMIN_ID, permissionCodes: ["payroll.manage"] },
} = {}) {
  const app = Fastify();
  const salaryItems = [
    {
      id: "salary-item-1",
      name: "基本工资",
      item_type: "earning",
      sort_order: 10,
      enabled: true,
    },
    {
      id: "salary-item-2",
      name: "社保扣除",
      item_type: "deduction",
      sort_order: 20,
      enabled: false,
    },
  ];
  const payslips = [buildPayslipRow()];
  const payslipItems = [
    {
      id: "item-1",
      payslip_id: "payslip-1",
      salary_item_id: "salary-item-1",
      amount: "10000.00",
      salary_item: salaryItems[0],
    },
    {
      id: "item-2",
      payslip_id: "payslip-1",
      salary_item_id: "salary-item-2",
      amount: "600.00",
      salary_item: salaryItems[1],
    },
  ];

  app.decorate("authenticate", async (request) => {
    request.employee = actor;
  });
  app.decorate("requirePermission", (permissionCode) => async (request) => {
    request.employee = actor;
    const codes = actor.permissionCodes ?? [];
    if (!codes.includes("*") && !codes.includes(permissionCode)) {
      throw new AppError({ code: "PERM_001", message: "无权限", statusCode: 403 });
    }
  });
  app.decorate("hasPermission", (employee, permissionCode) => {
    const codes = employee.permissionCodes ?? [];
    return codes.includes("*") || codes.includes(permissionCode);
  });
  app.decorate("prisma", {
    payslip: {
      findMany: vi.fn(async () =>
        payslips.map((item) => ({
          ...item,
          employee: {
            id: "employee-1",
            employee_no: "E001",
            name: "Alice",
            title: "专员",
            department: { id: "dept-1", name: "行政部" },
          },
          items: payslipItems.filter((row) => row.payslip_id === item.id),
        })),
      ),
    },
    auditLog: {
      create: vi.fn().mockResolvedValue({}),
    },
  });
  app.setErrorHandler((error, request, reply) => {
    reply.status(error.statusCode || 500).send({
      requestId: request.id,
      error: {
        code: error.code || "SYS_001",
        message: error.message,
        details: error.details ?? null,
      },
    });
  });

  await app.register(exportsRoutes, { prefix: "/api" });
  return { app };
}

describe("payroll export routes", () => {
  it("exports monthly payslips in csv and xlsx formats", async () => {
    const { app } = await buildApp();

    const csvResponse = await app.inject({
      method: "GET",
      url: "/api/exports/payslips?month=2026-04&format=csv",
    });

    expect(csvResponse.statusCode).toBe(200);
    expect(csvResponse.headers["content-type"]).toContain("text/csv");
    const csvBody = csvResponse.body;
    expect(csvBody).toContain("工号,姓名,部门,基本工资,社保扣除,应发合计,应扣合计,实发合计");
    expect(csvBody).toContain("E001,Alice,行政部,10000,600,10000,600,9400");

    const xlsxResponse = await app.inject({
      method: "GET",
      url: "/api/exports/payslips?month=2026-04&format=xlsx",
    });

    expect(xlsxResponse.statusCode).toBe(200);
    const workbook = new ExcelJS.Workbook();
    await workbook.xlsx.load(Buffer.from(xlsxResponse.rawPayload));
    const sheet = workbook.getWorksheet("payslips");
    expect(sheet.getRow(1).values.slice(1, 9)).toEqual([
      "工号",
      "姓名",
      "部门",
      "基本工资",
      "社保扣除",
      "应发合计",
      "应扣合计",
      "实发合计",
    ]);

    await app.close();
  });

  it("rejects non-admin exports", async () => {
    const { app } = await buildApp({
      actor: {
        id: "employee-1",
        permissionCodes: ["employee"],
      },
    });

    const response = await app.inject({
      method: "GET",
      url: "/api/exports/payslips?month=2026-04&format=csv",
    });

    expect(response.statusCode).toBe(403);

    await app.close();
  });
});