import {
  emailSchema,
  urlSchema,
  currencySchema,
  companyConfigSchema,
  invitationEmailSchema,
  paymentRequestSchema,
  passwordResetSchema,
  invoiceSchema,
  reportSchema,
  validateEmail,
  validateUrl,
  sanitizeString,
  formatValidationError
} from '../../src/lib/validation';
import { z } from 'zod';

describe('Validation Module', () => {
  describe('Basic Schema Validation', () => {
    describe('emailSchema', () => {
      it('should validate correct email addresses', () => {
        expect(emailSchema.safeParse('user@example.com').success).toBe(true);
        expect(emailSchema.safeParse('test.email@domain.co.uk').success).toBe(true);
        expect(emailSchema.safeParse('user+tag@example.org').success).toBe(true);
      });

      it('should reject invalid email addresses', () => {
        expect(emailSchema.safeParse('invalid-email').success).toBe(false);
        expect(emailSchema.safeParse('@example.com').success).toBe(false);
        expect(emailSchema.safeParse('user@').success).toBe(false);
        expect(emailSchema.safeParse('').success).toBe(false);
      });
    });

    describe('urlSchema', () => {
      it('should validate correct URLs', () => {
        expect(urlSchema.safeParse('https://example.com').success).toBe(true);
        expect(urlSchema.safeParse('http://localhost:3000').success).toBe(true);
        expect(urlSchema.safeParse('https://sub.domain.com/path?query=1').success).toBe(true);
      });

      it('should reject invalid URLs', () => {
        expect(urlSchema.safeParse('not-a-url').success).toBe(false);
        expect(urlSchema.safeParse('').success).toBe(false);
        // Note: ftp:// is actually a valid URL scheme, so we test with invalid format instead
        expect(urlSchema.safeParse('://invalid').success).toBe(false);
      });
    });

    describe('currencySchema', () => {
      it('should validate supported currencies', () => {
        expect(currencySchema.safeParse('USD').success).toBe(true);
        expect(currencySchema.safeParse('EUR').success).toBe(true);
        expect(currencySchema.safeParse('GBP').success).toBe(true);
        expect(currencySchema.safeParse('CAD').success).toBe(true);
        expect(currencySchema.safeParse('AUD').success).toBe(true);
      });

      it('should reject unsupported currencies', () => {
        expect(currencySchema.safeParse('JPY').success).toBe(false);
        expect(currencySchema.safeParse('CHF').success).toBe(false);
        expect(currencySchema.safeParse('').success).toBe(false);
      });
    });
  });

  describe('Company Configuration Schema', () => {
    const validCompany = {
      name: 'Test Company',
      logoUrl: 'https://example.com/logo.png',
      primaryColor: '#ff0000',
      paymentLink: 'https://pay.example.com',
      bankDetails: {
        bankName: 'Test Bank',
        accountName: 'Test Account',
        accountNumber: '123456789',
        branch: 'Main Branch',
        iban: 'GB82WEST12345698765432',
        referenceNote: 'Payment reference'
      }
    };

    it('should validate complete company configuration', () => {
      const result = companyConfigSchema.safeParse(validCompany);
      expect(result.success).toBe(true);
    });

    it('should validate minimal company configuration', () => {
      const minimal = { name: 'Test Company' };
      const result = companyConfigSchema.safeParse(minimal);
      expect(result.success).toBe(true);
    });

    it('should reject invalid company name', () => {
      const invalid = { ...validCompany, name: '' };
      const result = companyConfigSchema.safeParse(invalid);
      expect(result.success).toBe(false);
    });

    it('should reject invalid logo URL', () => {
      const invalid = { ...validCompany, logoUrl: 'not-a-url' };
      const result = companyConfigSchema.safeParse(invalid);
      expect(result.success).toBe(false);
    });

    it('should reject invalid color format', () => {
      const invalid = { ...validCompany, primaryColor: 'red' };
      const result = companyConfigSchema.safeParse(invalid);
      expect(result.success).toBe(false);
    });

    it('should allow empty optional fields', () => {
      const withEmpty = { ...validCompany, logoUrl: '', paymentLink: '' };
      const result = companyConfigSchema.safeParse(withEmpty);
      expect(result.success).toBe(true);
    });
  });

  describe('Email Template Schemas', () => {
    const validCompany = { name: 'Test Company' };

    describe('invitationEmailSchema', () => {
      const validInvitation = {
        to: 'user@example.com',
        eventName: 'Test Event',
        dateTime: '2024-12-25 18:00',
        location: 'Test Location',
        ctaUrl: 'https://example.com/rsvp',
        company: validCompany
      };

      it('should validate complete invitation data', () => {
        const result = invitationEmailSchema.safeParse(validInvitation);
        expect(result.success).toBe(true);
      });

      it('should apply default CTA label', () => {
        const result = invitationEmailSchema.safeParse(validInvitation);
        if (result.success) {
          expect(result.data.ctaLabel).toBe('RSVP Now');
        }
      });

      it('should reject missing required fields', () => {
        const invalid = { ...validInvitation };
        delete invalid.eventName;
        const result = invitationEmailSchema.safeParse(invalid);
        expect(result.success).toBe(false);
      });
    });

    describe('paymentRequestSchema', () => {
      const validPayment = {
        to: 'user@example.com',
        amount: 100.50,
        currency: 'USD' as const,
        description: 'Test payment',
        dueDate: '2024-12-31',
        company: validCompany
      };

      it('should validate complete payment request', () => {
        const result = paymentRequestSchema.safeParse(validPayment);
        expect(result.success).toBe(true);
      });

      it('should reject negative amounts', () => {
        const invalid = { ...validPayment, amount: -10 };
        const result = paymentRequestSchema.safeParse(invalid);
        expect(result.success).toBe(false);
      });

      it('should reject excessive amounts', () => {
        const invalid = { ...validPayment, amount: 2000000 };
        const result = paymentRequestSchema.safeParse(invalid);
        expect(result.success).toBe(false);
      });
    });

    describe('passwordResetSchema', () => {
      const validReset = {
        to: 'user@example.com',
        resetLink: 'https://example.com/reset?token=abc123',
        company: validCompany
      };

      it('should validate password reset data', () => {
        const result = passwordResetSchema.safeParse(validReset);
        expect(result.success).toBe(true);
      });

      it('should reject invalid reset link', () => {
        const invalid = { ...validReset, resetLink: 'not-a-url' };
        const result = passwordResetSchema.safeParse(invalid);
        expect(result.success).toBe(false);
      });
    });

    describe('invoiceSchema', () => {
      const validInvoice = {
        to: 'user@example.com',
        invoiceNumber: 'INV-001',
        issueDate: '2024-01-01',
        currency: 'USD' as const,
        items: [
          {
            description: 'Test item',
            quantity: 2,
            unitPrice: 50.00
          }
        ],
        company: validCompany
      };

      it('should validate complete invoice', () => {
        const result = invoiceSchema.safeParse(validInvoice);
        expect(result.success).toBe(true);
      });

      it('should reject empty items array', () => {
        const invalid = { ...validInvoice, items: [] };
        const result = invoiceSchema.safeParse(invalid);
        expect(result.success).toBe(false);
      });

      it('should reject too many items', () => {
        const items = Array(60).fill({
          description: 'Item',
          quantity: 1,
          unitPrice: 10
        });
        const invalid = { ...validInvoice, items };
        const result = invoiceSchema.safeParse(invalid);
        expect(result.success).toBe(false);
      });
    });

    describe('reportSchema', () => {
      const validReport = {
        to: 'user@example.com',
        periodLabel: 'Q1 2024',
        totalAmount: 1000.00,
        taxAmount: 200.00,
        currency: 'USD' as const,
        company: validCompany
      };

      it('should validate report data', () => {
        const result = reportSchema.safeParse(validReport);
        expect(result.success).toBe(true);
      });

      it('should reject negative amounts', () => {
        const invalid = { ...validReport, totalAmount: -100 };
        const result = reportSchema.safeParse(invalid);
        expect(result.success).toBe(false);
      });
    });
  });

  describe('Utility Functions', () => {
    describe('validateEmail', () => {
      it('should validate correct emails', () => {
        expect(validateEmail('user@example.com')).toBe(true);
        expect(validateEmail('test@domain.org')).toBe(true);
      });

      it('should reject invalid emails', () => {
        expect(validateEmail('invalid-email')).toBe(false);
        expect(validateEmail('')).toBe(false);
      });
    });

    describe('validateUrl', () => {
      it('should validate correct URLs', () => {
        expect(validateUrl('https://example.com')).toBe(true);
        expect(validateUrl('http://localhost:3000')).toBe(true);
      });

      it('should reject invalid URLs', () => {
        expect(validateUrl('not-a-url')).toBe(false);
        expect(validateUrl('')).toBe(false);
      });
    });

    describe('sanitizeString', () => {
      it('should trim whitespace', () => {
        expect(sanitizeString('  test  ')).toBe('test');
      });

      it('should remove HTML tags', () => {
        expect(sanitizeString('test<script>alert(1)</script>test')).toBe('testscriptalert(1)/scripttest');
        expect(sanitizeString('Hello <b>world</b>!')).toBe('Hello bworld/b!');
      });

      it('should limit string length', () => {
        const longString = 'a'.repeat(2000);
        expect(sanitizeString(longString, 100)).toHaveLength(100);
      });

      it('should use default max length', () => {
        const longString = 'a'.repeat(2000);
        expect(sanitizeString(longString)).toHaveLength(1000);
      });
    });

    describe('formatValidationError', () => {
      it('should format single validation error', () => {
        const schema = z.object({ email: z.string().email() });
        const result = schema.safeParse({ email: 'invalid' });
        
        if (!result.success) {
          const formatted = formatValidationError(result.error);
          expect(formatted).toContain('email');
          expect(formatted).toContain('Invalid email');
        }
      });

      it('should format multiple validation errors', () => {
        const schema = z.object({
          email: z.string().email(),
          age: z.number().min(18)
        });
        const result = schema.safeParse({ email: 'invalid', age: 10 });
        
        if (!result.success) {
          const formatted = formatValidationError(result.error);
          expect(formatted).toContain('email');
          expect(formatted).toContain('age');
        }
      });
    });
  });
});