const Fastify = require("fastify");

const payrollRoutes = require("../../../src/routes/payroll");
const { AppError } = require("../../../src/utils/AppError");

const ADMIN_ID = "aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa";
const EMPLOYEE_ID = "bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb";

function buildEmployee(overrides = {}) {
  return {
    id: EMPLOYEE_ID,
    employee_no: "E001",
    name: "Alice",
    title: "专员",
    status: "active",
    department: { id: "dept-1", name: "行政部" },
    ...overrides,
  };
}

function buildSalaryItem(overrides = {}) {
  return {
    id: "11111111-1111-4111-8111-111111111111",
    name: "基本工资",
    item_type: "earning",
    sort_order: 10,
    enabled: true,
    created_at: new Date("2026-03-29T08:00:00.000Z"),
    created_by: ADMIN_ID,
    updated_at: new Date("2026-03-29T08:00:00.000Z"),
    updated_by: ADMIN_ID,
    ...overrides,
  };
}

function buildSalaryRow(overrides = {}) {
  return {
    id: "salary-1",
    employee_id: EMPLOYEE_ID,
    salary_item_id: "11111111-1111-4111-8111-111111111111",
    monthly_amount: "10000.00",
    effective_date: new Date("2026-01-01T00:00:00.000Z"),
    created_at: new Date("2026-01-01T00:00:00.000Z"),
    created_by: ADMIN_ID,
    updated_at: new Date("2026-01-01T00:00:00.000Z"),
    updated_by: ADMIN_ID,
    salary_item: buildSalaryItem(),
    ...overrides,
  };
}

async function buildApp({
  actor = { id: ADMIN_ID, permissionCodes: ["payroll.manage"] },
} = {}) {
  const app = Fastify();
  const state = {
    employee: buildEmployee(),
    salaryItems: [
      buildSalaryItem(),
      buildSalaryItem({
        id: "22222222-2222-4222-8222-222222222222",
        name: "社保扣除",
        item_type: "deduction",
        sort_order: 20,
      }),
    ],
    salaryRows: [buildSalaryRow()],
  };

  function attachSalaryItem(row) {
    return {
      ...row,
      salary_item: state.salaryItems.find((item) => item.id === row.salary_item_id),
    };
  }

  const employeeSalary = {
    findMany: vi.fn(async ({ where }) =>
      state.salaryRows
        .filter((item) => item.employee_id === where.employee_id)
        .map(attachSalaryItem),
    ),
    deleteMany: vi.fn(async ({ where }) => {
      const effectiveDate = where.effective_date.toISOString().slice(0, 10);
      state.salaryRows = state.salaryRows.filter(
        (item) => !(item.employee_id === where.employee_id && item.effective_date.toISOString().slice(0, 10) === effectiveDate),
      );
      return { count: 1 };
    }),
    createMany: vi.fn(async ({ data }) => {
      state.salaryRows.push(
        ...data.map((item, index) => ({
          id: `salary-${state.salaryRows.length + index + 1}`,
          employee_id: item.employee_id,
          salary_item_id: item.salary_item_id,
          monthly_amount: item.monthly_amount,
          effective_date: item.effective_date,
          created_at: new Date("2026-03-29T08:00:00.000Z"),
          created_by: item.created_by,
          updated_at: new Date("2026-03-29T08:00:00.000Z"),
          updated_by: item.updated_by,
        })),
      );
      return { count: data.length };
    }),
  };

  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", {
    employee: {
      findUnique: vi.fn(async ({ where }) => (where.id === state.employee.id ? state.employee : null)),
    },
    salaryItem: {
      findMany: vi.fn(async ({ where }) => state.salaryItems.filter((item) => where.id.in.includes(item.id))),
      findUnique: vi.fn(async ({ where }) => state.salaryItems.find((item) => item.id === where.id) ?? null),
    },
    employeeSalary,
    auditLog: {
      create: vi.fn().mockResolvedValue({}),
    },
    $transaction: vi.fn(async (callback) => callback(app.prisma)),
  });
  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(payrollRoutes, { prefix: "/api" });
  return { app, state, employeeSalary };
}

describe("payroll salary profile routes", () => {
  it("replaces salary snapshots for the same effective date and preserves history", async () => {
    const { app, state, employeeSalary } = await buildApp();

    const putResponse = await app.inject({
      method: "PUT",
      url: `/api/payroll/employees/${EMPLOYEE_ID}/profile`,
      payload: {
        effectiveDate: "2026-04-01",
        items: [
          {
            salaryItemId: state.salaryItems[0].id,
            monthlyAmount: 12000,
          },
          {
            salaryItemId: state.salaryItems[1].id,
            monthlyAmount: 800,
          },
        ],
      },
    });

    expect(putResponse.statusCode).toBe(200);
    expect(putResponse.json().data.snapshots[0]).toMatchObject({
      effectiveDate: "2026-04-01",
      items: [
        { salaryItemId: state.salaryItems[0].id, monthlyAmount: 12000 },
        { salaryItemId: state.salaryItems[1].id, monthlyAmount: 800 },
      ],
    });
    expect(putResponse.json().data.snapshots[1]).toMatchObject({
      effectiveDate: "2026-01-01",
    });

    const replaceResponse = await app.inject({
      method: "PUT",
      url: `/api/payroll/employees/${EMPLOYEE_ID}/profile`,
      payload: {
        effectiveDate: "2026-04-01",
        items: [
          {
            salaryItemId: state.salaryItems[0].id,
            monthlyAmount: 12500,
          },
        ],
      },
    });

    expect(replaceResponse.statusCode).toBe(200);
    expect(replaceResponse.json().data.snapshots[0]).toMatchObject({
      effectiveDate: "2026-04-01",
      items: [{ salaryItemId: state.salaryItems[0].id, monthlyAmount: 12500 }],
    });
    expect(replaceResponse.json().data.snapshots).toHaveLength(2);

    const getResponse = await app.inject({
      method: "GET",
      url: `/api/payroll/employees/${EMPLOYEE_ID}/profile`,
    });

    expect(getResponse.statusCode).toBe(200);
    expect(getResponse.json().data.snapshots).toHaveLength(2);
    expect(employeeSalary.deleteMany).toHaveBeenCalledTimes(2);
    expect(employeeSalary.createMany).toHaveBeenCalledTimes(2);

    await app.close();
  });

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

    const response = await app.inject({
      method: "GET",
      url: `/api/payroll/employees/${EMPLOYEE_ID}/profile`,
    });

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

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