"""
Test Generator Agent

Automatically generates comprehensive unit tests and integration tests
for code, ensuring high coverage and quality.
"""

from typing import Any, Dict, List
from agents.base import BaseAgent


class TestGeneratorAgent(BaseAgent):
    """
    Generates unit and integration tests automatically.

    Features:
    - Unit test generation
    - Integration test generation
    - Edge case coverage
    - Mock/stub generation
    - Assertion generation
    - Test data fixtures
    """

    def __init__(self):
        super().__init__(
            name='test-generator',
            description='Generate comprehensive unit and integration tests',
            category='engineering',
            version='1.0.0',
            tags=['testing', 'unit-tests', 'integration-tests', 'quality-assurance']
        )

    async def execute(self, params: Dict[str, Any]) -> Dict[str, Any]:
        """
        Generate tests for code.

        Args:
            params: {
                'source_file': str,
                'language': 'python|javascript|typescript|go|rust',
                'test_type': 'unit|integration|e2e|all',
                'framework': 'pytest|jest|mocha|unittest|go-test',
                'options': {
                    'include_edge_cases': bool,
                    'include_mocks': bool,
                    'coverage_target': float,
                    'generate_fixtures': bool,
                    'async_tests': bool
                }
            }

        Returns:
            {
                'status': 'success|failed',
                'test_files_generated': List[str],
                'total_tests': int,
                'test_breakdown': Dict[str, int],
                'coverage_estimate': float,
                'framework': str,
                'fixtures_generated': List[str],
                'mocks_generated': List[str]
            }
        """
        source_file = params.get('source_file')
        language = params.get('language', 'python')
        test_type = params.get('test_type', 'unit')
        framework = params.get('framework', self._get_default_framework(language))
        options = params.get('options', {})

        self.logger.info(
            f"Generating {test_type} tests for {source_file} using {framework}"
        )

        # Mock test generation results
        test_breakdown = {
            'unit_tests': 24,
            'integration_tests': 8,
            'edge_case_tests': 12,
            'error_handling_tests': 6
        }

        return {
            'status': 'success',
            'source_file': source_file,
            'language': language,
            'test_type': test_type,
            'framework': framework,
            'test_files_generated': [
                f'tests/test_{source_file.split("/")[-1]}',
                f'tests/integration/test_{source_file.split("/")[-1]}_integration',
                'tests/fixtures.py'
            ],
            'total_tests': sum(test_breakdown.values()),
            'test_breakdown': test_breakdown,
            'coverage_estimate': 87.5,
            'functions_tested': 18,
            'classes_tested': 4,
            'edge_cases_covered': [
                'Empty input handling',
                'Null/None values',
                'Boundary conditions',
                'Type errors',
                'Network failures',
                'Concurrent access'
            ],
            'fixtures_generated': [
                'user_fixture',
                'database_fixture',
                'mock_api_response',
                'test_data_factory'
            ],
            'mocks_generated': [
                'MockDatabase',
                'MockAPIClient',
                'MockFileSystem',
                'MockLogger'
            ],
            'assertions_count': 142,
            'test_data_examples': 15,
            'estimated_runtime': '2.3s',
            'next_steps': [
                'Review generated tests for accuracy',
                'Add custom test cases for business logic',
                'Run tests and adjust as needed',
                'Integrate into CI/CD pipeline'
            ]
        }

    def validate_params(self, params: Dict[str, Any]) -> bool:
        """Validate test generation parameters."""
        if 'source_file' not in params:
            self.logger.error("Missing required field: source_file")
            return False

        valid_languages = ['python', 'javascript', 'typescript', 'go', 'rust']
        language = params.get('language', 'python')

        if language not in valid_languages:
            self.logger.error(f"Unsupported language: {language}")
            return False

        valid_test_types = ['unit', 'integration', 'e2e', 'all']
        test_type = params.get('test_type', 'unit')

        if test_type not in valid_test_types:
            self.logger.error(f"Invalid test type: {test_type}")
            return False

        return True

    def _get_default_framework(self, language: str) -> str:
        """Get default testing framework for language."""
        frameworks = {
            'python': 'pytest',
            'javascript': 'jest',
            'typescript': 'jest',
            'go': 'testing',
            'rust': 'cargo-test'
        }
        return frameworks.get(language, 'pytest')
