import { validatePaymentRequest } from '@/gateway/validation/payment-validation';
import { PaymentType, Currency } from '@/models/payment';

describe('Payment Validation', () => {
  describe('validatePaymentRequest', () => {
    it('should validate correct payment request', () => {
      const validRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000.50,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1',
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'John Doe',
        purpose: 'Payment for services',
        remittanceInfo: 'Invoice #12345',
      };

      const result = validatePaymentRequest(validRequest);
      expect(result.error).toBeUndefined();
      expect(result.value).toBeDefined();
      expect(result.value?.type).toBe(PaymentType.CUSTOMER_CREDIT_TRANSFER);
    });

    it('should reject missing required fields', () => {
      const invalidRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000,
        // Missing currency, accounts, BICs, beneficiary
      };

      const result = validatePaymentRequest(invalidRequest);
      expect(result.error).toBeDefined();
      expect(result.value).toBeUndefined();
    });

    it('should reject invalid payment type', () => {
      const invalidRequest = {
        type: 'INVALID_TYPE',
        amount: 1000,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1',
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'John Doe',
      };

      const result = validatePaymentRequest(invalidRequest);
      expect(result.error).toBeDefined();
    });

    it('should reject negative amount', () => {
      const invalidRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: -1000,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1',
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'John Doe',
      };

      const result = validatePaymentRequest(invalidRequest);
      expect(result.error).toBeDefined();
    });

    it('should reject zero amount', () => {
      const invalidRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 0,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1',
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'John Doe',
      };

      const result = validatePaymentRequest(invalidRequest);
      expect(result.error).toBeDefined();
    });

    it('should reject invalid currency', () => {
      const invalidRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000,
        currency: 'INVALID',
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1',
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'John Doe',
      };

      const result = validatePaymentRequest(invalidRequest);
      expect(result.error).toBeDefined();
    });

    it('should reject invalid BIC format', () => {
      const invalidRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'INVALID', // Invalid BIC
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'John Doe',
      };

      const result = validatePaymentRequest(invalidRequest);
      expect(result.error).toBeDefined();
    });

    it('should accept valid BIC8 format', () => {
      const validRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1', // BIC8
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2', // BIC8
        beneficiaryName: 'John Doe',
      };

      const result = validatePaymentRequest(validRequest);
      expect(result.error).toBeUndefined();
    });

    it('should accept valid BIC11 format', () => {
      const validRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1XXX', // BIC11
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2XXX', // BIC11
        beneficiaryName: 'John Doe',
      };

      const result = validatePaymentRequest(validRequest);
      expect(result.error).toBeUndefined();
    });

    it('should accept optional fields', () => {
      const validRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1',
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'John Doe',
        purpose: 'Optional purpose',
        remittanceInfo: 'Optional remittance',
      };

      const result = validatePaymentRequest(validRequest);
      expect(result.error).toBeUndefined();
      expect(result.value?.purpose).toBe('Optional purpose');
      expect(result.value?.remittanceInfo).toBe('Optional remittance');
    });

    it('should handle both payment types', () => {
      const pacs008Request = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1',
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'John Doe',
      };

      const pacs009Request = {
        ...pacs008Request,
        type: PaymentType.FI_TO_FI,
      };

      expect(validatePaymentRequest(pacs008Request).error).toBeUndefined();
      expect(validatePaymentRequest(pacs009Request).error).toBeUndefined();
    });

    it('should enforce maximum length for beneficiary name', () => {
      const invalidRequest = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000,
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1',
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'A'.repeat(256), // Too long
      };

      const result = validatePaymentRequest(invalidRequest);
      expect(result.error).toBeDefined();
    });

    it('should enforce decimal precision for amount', () => {
      const requestWithManyDecimals = {
        type: PaymentType.CUSTOMER_CREDIT_TRANSFER,
        amount: 1000.123456, // Too many decimals
        currency: Currency.USD,
        senderAccount: 'ACC001',
        senderBIC: 'TESTBIC1',
        receiverAccount: 'ACC002',
        receiverBIC: 'TESTBIC2',
        beneficiaryName: 'John Doe',
      };

      const result = validatePaymentRequest(requestWithManyDecimals);
      // Should either reject or round to 2 decimals
      expect(result).toBeDefined();
    });
  });
});