const XLSX = require("xlsx");

const { encryptStringOrThrow } = require("../../../src/services/crypto");
const {
  HEADERS,
  PaymentOrderXlsError,
  buildCustomerSerial,
  generatePaymentOrderXls,
} = require("../../../src/services/paymentOrderXls");

const FIELD_ENCRYPTION_KEY = Buffer.alloc(32, 7).toString("base64");
const config = { fieldEncryptionKey: FIELD_ENCRYPTION_KEY };
const encrypt = (value) => encryptStringOrThrow(config, value);

function buildBatch(overrides = {}) {
  return {
    batch_no: "PB-20260802-002",
    payment_account_snapshot_json: {
      bankInstitutionCode: "CCB",
      accountName: "合成测试公司",
      accountNumberEncrypted: encrypt("6217000000000012345"),
    },
    items: [
      {
        id: "b",
        entity_code: "BX-20260802-0002",
        amount: "2.00",
        snapshot_json: { payee: { name: "乙", bankName: "中国建设银行", bankInstitutionCode: "CCB", bankAccountEncrypted: encrypt("6222000000000056789") } },
      },
      {
        id: "a",
        entity_code: "BX-20260802-0001",
        amount: "1.20",
        snapshot_json: { payee: { name: "甲", bankName: "中国建设银行", bankInstitutionCode: "CCB", bankAccountEncrypted: encrypt("6222000000000012345") } },
      },
    ],
    ...overrides,
  };
}

describe("payment order BIFF8 generator", () => {
  it("writes the fixed workbook contract with typed string identifiers and stable ordering", () => {
    const first = generatePaymentOrderXls(config, buildBatch());
    const second = generatePaymentOrderXls(config, buildBatch());
    const workbook = XLSX.read(first.buffer, { type: "buffer", cellNF: true });
    const sheet = workbook.Sheets.Sheet1;

    expect(first.buffer.subarray(0, 8).toString("hex")).toBe("d0cf11e0a1b11ae1");
    expect(workbook.SheetNames).toEqual(["Sheet1", "Sheet2", "Sheet3"]);
    expect(XLSX.utils.sheet_to_json(sheet, { header: 1 })[0]).toEqual(HEADERS);
    expect(sheet.B2).toMatchObject({ t: "s", v: "6217000000000012345" });
    expect(sheet.D2).toMatchObject({ t: "s", v: "01" });
    expect(sheet.E2).toMatchObject({ t: "s", v: "6222000000000012345" });
    expect(sheet.I2).toMatchObject({ t: "s", v: "PB-20260802-002-001" });
    expect(sheet.J2).toMatchObject({ t: "n", v: 1.2 });
    expect(sheet.M2).toMatchObject({ t: "s", v: "0" });
    expect(first.serials).toEqual(second.serials);
    expect(first.totalAmount).toBe("3.20");
  });

  it("fails the whole export and reports every blocking payee issue", () => {
    const batch = buildBatch();
    batch.items[1].snapshot_json.payee.bankInstitutionCode = "OTHER";
    batch.items[0].snapshot_json.payee.bankAccountEncrypted = null;
    try {
      generatePaymentOrderXls(config, batch);
      throw new Error("expected payment order generation to fail");
    } catch (error) {
      expect(error).toBeInstanceOf(PaymentOrderXlsError);
      expect(error.code).toBe("payee_bank_not_supported");
      expect(error.details.blockers).toEqual(expect.arrayContaining([
        { code: "payee_bank_not_supported", entityCode: "BX-20260802-0001" },
        { code: "payee_account_unavailable", entityCode: "BX-20260802-0002" },
      ]));
    }
  });

  it("validates customer serial length and character set without truncation", () => {
    expect(buildCustomerSerial("PB-20260802-002", 1)).toBe("PB-20260802-002-001");
    expect(() => buildCustomerSerial("pb invalid", 1)).toThrow(PaymentOrderXlsError);
    expect(() => buildCustomerSerial("PB-123456789012345678901234567890", 1)).toThrow(PaymentOrderXlsError);
  });
});