/**
 * Validation Utilities Tests
 * @author Descomplicar® | @link descomplicar.pt | @copyright 2026
 */

import { z } from 'zod';
import {
  schemas,
  validateInput,
  safeValidateInput,
  formatZodError,
  toolSchemas,
  validateUUIDs,
  validateEnum,
  validateStringLength,
  validateNumberRange
} from '../validation';

describe('Validation Utilities', () => {
  describe('schemas', () => {
    describe('uuid', () => {
      it('should accept valid UUIDs', () => {
        expect(schemas.uuid.safeParse('550e8400-e29b-41d4-a716-446655440000').success).toBe(true);
      });

      it('should reject invalid UUIDs', () => {
        expect(schemas.uuid.safeParse('not-a-uuid').success).toBe(false);
        expect(schemas.uuid.safeParse('').success).toBe(false);
      });
    });

    describe('email', () => {
      it('should accept valid emails', () => {
        expect(schemas.email.safeParse('test@example.com').success).toBe(true);
      });

      it('should reject invalid emails', () => {
        expect(schemas.email.safeParse('notanemail').success).toBe(false);
      });
    });

    describe('pagination', () => {
      it('should use defaults', () => {
        const result = schemas.pagination.parse({});
        expect(result.limit).toBe(25);
        expect(result.offset).toBe(0);
      });

      it('should accept valid values', () => {
        const result = schemas.pagination.parse({ limit: 50, offset: 10 });
        expect(result.limit).toBe(50);
        expect(result.offset).toBe(10);
      });

      it('should reject out of range values', () => {
        expect(schemas.pagination.safeParse({ limit: 0 }).success).toBe(false);
        expect(schemas.pagination.safeParse({ limit: 101 }).success).toBe(false);
        expect(schemas.pagination.safeParse({ offset: -1 }).success).toBe(false);
      });
    });

    describe('permission', () => {
      it('should accept valid permissions', () => {
        expect(schemas.permission.safeParse('read').success).toBe(true);
        expect(schemas.permission.safeParse('read_write').success).toBe(true);
        expect(schemas.permission.safeParse('admin').success).toBe(true);
      });

      it('should reject invalid permissions', () => {
        expect(schemas.permission.safeParse('invalid').success).toBe(false);
        expect(schemas.permission.safeParse('ADMIN').success).toBe(false);
      });
    });

    describe('userRole', () => {
      it('should accept valid roles', () => {
        expect(schemas.userRole.safeParse('admin').success).toBe(true);
        expect(schemas.userRole.safeParse('member').success).toBe(true);
        expect(schemas.userRole.safeParse('viewer').success).toBe(true);
        expect(schemas.userRole.safeParse('guest').success).toBe(true);
      });

      it('should reject invalid roles', () => {
        expect(schemas.userRole.safeParse('superadmin').success).toBe(false);
      });
    });

    describe('booleanString', () => {
      it('should accept boolean values', () => {
        expect(schemas.booleanString.parse(true)).toBe(true);
        expect(schemas.booleanString.parse(false)).toBe(false);
      });

      it('should transform string values', () => {
        expect(schemas.booleanString.parse('true')).toBe(true);
        expect(schemas.booleanString.parse('1')).toBe(true);
        expect(schemas.booleanString.parse('false')).toBe(false);
        expect(schemas.booleanString.parse('0')).toBe(false);
      });
    });
  });

  describe('validateInput', () => {
    const testSchema = z.object({
      name: z.string().min(1),
      age: z.number().int().positive()
    });

    it('should return validated data for valid input', () => {
      const result = validateInput(testSchema, { name: 'John', age: 30 });
      expect(result).toEqual({ name: 'John', age: 30 });
    });

    it('should throw ZodError for invalid input', () => {
      expect(() => validateInput(testSchema, { name: '', age: -1 })).toThrow();
    });
  });

  describe('safeValidateInput', () => {
    const testSchema = z.object({
      id: z.string().uuid()
    });

    it('should return success for valid input', () => {
      const result = safeValidateInput(testSchema, { id: '550e8400-e29b-41d4-a716-446655440000' });
      expect(result.success).toBe(true);
      if (result.success) {
        expect(result.data.id).toBe('550e8400-e29b-41d4-a716-446655440000');
      }
    });

    it('should return error for invalid input', () => {
      const result = safeValidateInput(testSchema, { id: 'invalid' });
      expect(result.success).toBe(false);
      if (!result.success) {
        expect(result.error).toBeInstanceOf(z.ZodError);
      }
    });
  });

  describe('formatZodError', () => {
    it('should format errors with path', () => {
      const schema = z.object({
        user: z.object({
          email: z.string().email()
        })
      });

      const result = schema.safeParse({ user: { email: 'invalid' } });
      if (!result.success) {
        const formatted = formatZodError(result.error);
        expect(formatted).toContain('user.email');
      }
    });

    it('should format errors without path', () => {
      const schema = z.string().min(5);
      const result = schema.safeParse('abc');
      if (!result.success) {
        const formatted = formatZodError(result.error);
        expect(formatted).not.toContain('.');
      }
    });
  });

  describe('toolSchemas', () => {
    describe('listArgs', () => {
      it('should accept valid pagination', () => {
        expect(toolSchemas.listArgs.safeParse({ limit: 50, offset: 10 }).success).toBe(true);
        expect(toolSchemas.listArgs.safeParse({}).success).toBe(true);
      });
    });

    describe('getByIdArgs', () => {
      it('should require valid UUID id', () => {
        expect(toolSchemas.getByIdArgs.safeParse({ id: '550e8400-e29b-41d4-a716-446655440000' }).success).toBe(true);
        expect(toolSchemas.getByIdArgs.safeParse({ id: 'invalid' }).success).toBe(false);
        expect(toolSchemas.getByIdArgs.safeParse({}).success).toBe(false);
      });
    });

    describe('bulkDocumentArgs', () => {
      it('should require at least one document_id', () => {
        expect(toolSchemas.bulkDocumentArgs.safeParse({ document_ids: [] }).success).toBe(false);
        expect(toolSchemas.bulkDocumentArgs.safeParse({
          document_ids: ['550e8400-e29b-41d4-a716-446655440000']
        }).success).toBe(true);
      });

      it('should validate all UUIDs', () => {
        expect(toolSchemas.bulkDocumentArgs.safeParse({
          document_ids: ['550e8400-e29b-41d4-a716-446655440000', 'invalid']
        }).success).toBe(false);
      });

      it('should limit to 100 documents', () => {
        const tooMany = Array(101).fill('550e8400-e29b-41d4-a716-446655440000');
        expect(toolSchemas.bulkDocumentArgs.safeParse({ document_ids: tooMany }).success).toBe(false);
      });
    });

    describe('searchArgs', () => {
      it('should require non-empty query', () => {
        expect(toolSchemas.searchArgs.safeParse({ query: '' }).success).toBe(false);
        expect(toolSchemas.searchArgs.safeParse({ query: 'test' }).success).toBe(true);
      });
    });
  });

  describe('validateUUIDs', () => {
    it('should accept valid UUID arrays', () => {
      expect(() => validateUUIDs([
        '550e8400-e29b-41d4-a716-446655440000',
        '6ba7b810-9dad-11d1-80b4-00c04fd430c8'
      ])).not.toThrow();
    });

    it('should throw for invalid UUIDs', () => {
      expect(() => validateUUIDs(['invalid'])).toThrow();
    });

    it('should include field name in error', () => {
      expect(() => validateUUIDs(['invalid'], 'document_ids')).toThrow('document_ids');
    });
  });

  describe('validateEnum', () => {
    const allowed = ['a', 'b', 'c'] as const;

    it('should accept valid values', () => {
      expect(validateEnum('a', allowed, 'test')).toBe('a');
      expect(validateEnum('b', allowed, 'test')).toBe('b');
    });

    it('should throw for invalid values', () => {
      expect(() => validateEnum('d', allowed, 'test')).toThrow('Invalid test');
      expect(() => validateEnum('d', allowed, 'test')).toThrow('Allowed values');
    });
  });

  describe('validateStringLength', () => {
    it('should accept strings within range', () => {
      expect(() => validateStringLength('hello', 1, 10, 'name')).not.toThrow();
      expect(() => validateStringLength('a', 1, 10, 'name')).not.toThrow();
      expect(() => validateStringLength('1234567890', 1, 10, 'name')).not.toThrow();
    });

    it('should throw for strings outside range', () => {
      expect(() => validateStringLength('', 1, 10, 'name')).toThrow();
      expect(() => validateStringLength('12345678901', 1, 10, 'name')).toThrow();
    });
  });

  describe('validateNumberRange', () => {
    it('should accept numbers within range', () => {
      expect(() => validateNumberRange(5, 1, 10, 'age')).not.toThrow();
      expect(() => validateNumberRange(1, 1, 10, 'age')).not.toThrow();
      expect(() => validateNumberRange(10, 1, 10, 'age')).not.toThrow();
    });

    it('should throw for numbers outside range', () => {
      expect(() => validateNumberRange(0, 1, 10, 'age')).toThrow();
      expect(() => validateNumberRange(11, 1, 10, 'age')).toThrow();
    });
  });
});