/**
 * Tests unitaires pour src/utils/helpers.js
 */
import {
  generateToken,
  generateJWT,
  verifyJWT,
  generateTicketCode,
  isValidEmail,
  isValidPhone,
  cleanPhone,
  formatDate,
  maskEmail,
  getTokenExpiry,
  isExpired,
  generateRandomPassword,
  getPagination,
  formatPaginatedResponse,
} from '../../src/utils/helpers.js';

describe('Helpers - Token Generation', () => {
  describe('generateToken', () => {
    it('should generate a token of default length 32', () => {
      const token = generateToken();
      expect(token).toHaveLength(64); // hex string is 2x the byte length
    });

    it('should generate a token of specified length', () => {
      const token = generateToken(16);
      expect(token).toHaveLength(32);
    });

    it('should generate unique tokens', () => {
      const token1 = generateToken();
      const token2 = generateToken();
      expect(token1).not.toBe(token2);
    });
  });

  describe('generateJWT', () => {
    it('should generate a valid JWT token', () => {
      const token = generateJWT(1, 'test@example.com', 'CLIENT');
      expect(token).toBeDefined();
      expect(typeof token).toBe('string');
      expect(token.split('.')).toHaveLength(3);
    });
  });

  describe('verifyJWT', () => {
    it('should verify a valid JWT token', () => {
      const token = generateJWT(1, 'test@example.com', 'CLIENT');
      const decoded = verifyJWT(token);
      expect(decoded).toBeDefined();
      expect(decoded.userId).toBe(1);
      expect(decoded.email).toBe('test@example.com');
      expect(decoded.role).toBe('CLIENT');
    });

    it('should return null for invalid token', () => {
      const decoded = verifyJWT('invalid-token');
      expect(decoded).toBeNull();
    });
  });
});

describe('Helpers - Ticket Code Generation', () => {
  describe('generateTicketCode', () => {
    it('should generate a ticket code starting with TTP', () => {
      const code = generateTicketCode();
      expect(code).toMatch(/^TTP/);
    });

    it('should generate a 10-character code', () => {
      const code = generateTicketCode();
      expect(code).toHaveLength(10);
    });

    it('should include current year', () => {
      const code = generateTicketCode();
      const year = new Date().getFullYear().toString();
      expect(code).toContain(year);
    });

    it('should generate unique codes', () => {
      const codes = new Set();
      for (let i = 0; i < 100; i++) {
        codes.add(generateTicketCode());
      }
      expect(codes.size).toBe(100);
    });
  });
});

describe('Helpers - Validation', () => {
  describe('isValidEmail', () => {
    it('should return true for valid emails', () => {
      expect(isValidEmail('test@example.com')).toBe(true);
      expect(isValidEmail('user.name@domain.fr')).toBe(true);
      expect(isValidEmail('user+tag@example.org')).toBe(true);
    });

    it('should return false for invalid emails', () => {
      expect(isValidEmail('invalid')).toBe(false);
      expect(isValidEmail('invalid@')).toBe(false);
      expect(isValidEmail('@domain.com')).toBe(false);
      expect(isValidEmail('')).toBe(false);
    });
  });

  describe('isValidPhone', () => {
    it('should return true for valid French phone numbers', () => {
      expect(isValidPhone('0612345678')).toBe(true);
      expect(isValidPhone('06 12 34 56 78')).toBe(true);
      expect(isValidPhone('+33612345678')).toBe(true);
    });

    it('should return false for invalid phone numbers', () => {
      expect(isValidPhone('123')).toBe(false);
      expect(isValidPhone('')).toBe(false);
    });
  });

  describe('cleanPhone', () => {
    it('should remove spaces from phone number', () => {
      expect(cleanPhone('06 12 34 56 78')).toBe('0612345678');
    });

    it('should handle already clean numbers', () => {
      expect(cleanPhone('0612345678')).toBe('0612345678');
    });
  });
});

describe('Helpers - Date Functions', () => {
  describe('formatDate', () => {
    it('should format date to French locale', () => {
      const date = new Date('2025-01-15');
      const formatted = formatDate(date);
      expect(formatted).toContain('2025');
    });
  });

  describe('getTokenExpiry', () => {
    it('should return a future date', () => {
      const expiry = getTokenExpiry(24);
      expect(new Date(expiry).getTime()).toBeGreaterThan(Date.now());
    });
  });

  describe('isExpired', () => {
    it('should return true for past dates', () => {
      const pastDate = new Date('2020-01-01');
      expect(isExpired(pastDate)).toBe(true);
    });

    it('should return false for future dates', () => {
      const futureDate = new Date('2030-01-01');
      expect(isExpired(futureDate)).toBe(false);
    });
  });
});

describe('Helpers - Security', () => {
  describe('maskEmail', () => {
    it('should mask the middle of email', () => {
      const masked = maskEmail('john.doe@example.com');
      expect(masked).toContain('***');
      expect(masked).not.toBe('john.doe@example.com');
    });
  });

  describe('generateRandomPassword', () => {
    it('should generate password of specified length', () => {
      const password = generateRandomPassword(12);
      expect(password).toHaveLength(12);
    });

    it('should generate unique passwords', () => {
      const p1 = generateRandomPassword(16);
      const p2 = generateRandomPassword(16);
      expect(p1).not.toBe(p2);
    });
  });
});

describe('Helpers - Pagination', () => {
  describe('getPagination', () => {
    it('should calculate correct offset', () => {
      expect(getPagination(1, 10)).toEqual({ offset: 0, limit: 10 });
      expect(getPagination(2, 10)).toEqual({ offset: 10, limit: 10 });
      expect(getPagination(3, 20)).toEqual({ offset: 40, limit: 20 });
    });

    it('should handle default values', () => {
      const result = getPagination();
      expect(result.offset).toBeDefined();
      expect(result.limit).toBeDefined();
    });
  });

  describe('formatPaginatedResponse', () => {
    it('should format paginated response correctly', () => {
      const data = [{ id: 1 }, { id: 2 }];
      const response = formatPaginatedResponse(data, 100, 1, 10);

      expect(response.data).toEqual(data);
      expect(response.pagination.total).toBe(100);
      expect(response.pagination.page).toBe(1);
      expect(response.pagination.limit).toBe(10);
      expect(response.pagination.totalPages).toBe(10);
    });
  });
});