"""
Exercise 16.6: Testing in Python

Learn how to create effective tests for your Python code.

Tasks:
1. Complete the functions to create and run tests
2. Learn about different testing frameworks and approaches
3. Practice writing and running tests

Topics covered:
- Unit testing with pytest
- Test fixtures and parameterization
- Test coverage analysis
- Integration and functional testing
"""

import os
import sys
import subprocess
import tempfile
from pathlib import Path
from typing import List, Dict, Any, Tuple, Optional, Callable

def create_unittest(function_name: str, module_name: str) -> str:
    """
    Create a unittest for a function.
    
    Args:
        function_name: Name of the function to test
        module_name: Name of the module containing the function
        
    Returns:
        Generated unittest code
    """
    # TODO: Generate unittest code for the function
    # TODO: Include basic test cases
    # TODO: Return the generated code
    pass

def create_pytest(function_name: str, module_name: str) -> str:
    """
    Create a pytest for a function.
    
    Args:
        function_name: Name of the function to test
        module_name: Name of the module containing the function
        
    Returns:
        Generated pytest code
    """
    # TODO: Generate pytest code for the function
    # TODO: Include basic test cases
    # TODO: Return the generated code
    pass

def run_tests(test_dir: Path, pattern: str = "test_*.py") -> Tuple[bool, Dict[str, Any]]:
    """
    Run tests in a directory.
    
    Args:
        test_dir: Directory containing tests
        pattern: Pattern to match test files
        
    Returns:
        Tuple of (success, test_results)
    """
    # TODO: Run pytest with the specified pattern
    # TODO: Parse the test results
    # TODO: Return success/failure and results
    pass

def check_coverage(test_dir: Path, source_dir: Path) -> Tuple[bool, Dict[str, Any]]:
    """
    Check test coverage for a project.
    
    Args:
        test_dir: Directory containing tests
        source_dir: Directory containing source code
        
    Returns:
        Tuple of (success, coverage_results)
    """
    # TODO: Run pytest with coverage
    # TODO: Parse the coverage results
    # TODO: Return success/failure and results
    pass

def create_fixtures_file(fixtures: List[Dict[str, Any]], output_path: Path) -> Tuple[bool, str]:
    """
    Create a pytest fixtures file.
    
    Args:
        fixtures: List of fixture definitions
        output_path: Path to save the fixtures file
        
    Returns:
        Tuple of (success, message)
    """
    # TODO: Generate fixture definitions
    # TODO: Write to the output file
    # TODO: Return success/failure and message
    pass

def create_parametrized_test(function_name: str, test_cases: List[Dict[str, Any]]) -> str:
    """
    Create a parametrized pytest.
    
    Args:
        function_name: Name of the function to test
        test_cases: List of test cases
        
    Returns:
        Generated parametrized test code
    """
    # TODO: Generate parametrized test code
    # TODO: Include test cases
    # TODO: Return the generated code
    pass

def setup_tox_config(project_dir: Path, python_versions: List[str]) -> Tuple[bool, str]:
    """
    Set up a tox configuration for testing with multiple Python versions.
    
    Args:
        project_dir: Project directory
        python_versions: List of Python versions to test with
        
    Returns:
        Tuple of (success, message)
    """
    # TODO: Create a tox.ini file
    # TODO: Configure tox for the specified Python versions
    # TODO: Return success/failure and message
    pass

class TestGenerator:
    """A class to generate tests for Python code."""
    
    def __init__(self, source_file: Path):
        """
        Initialize the test generator.
        
        Args:
            source_file: Path to the source file
        """
        self.source_file = source_file
        # TODO: Parse the source file to extract functions and classes
    
    def analyze_code(self) -> Dict[str, Any]:
        """
        Analyze the source code to identify testable elements.
        
        Returns:
            Dictionary with analysis results
        """
        # TODO: Identify functions and classes
        # TODO: Extract signatures and docstrings
        # TODO: Return the analysis results
        pass
    
    def generate_test_file(self, test_style: str = "pytest") -> str:
        """
        Generate a test file for the source file.
        
        Args:
            test_style: Test style ('pytest' or 'unittest')
            
        Returns:
            Generated test code
        """
        # TODO: Generate appropriate test code based on the analysis
        # TODO: Return the generated code
        pass
    
    def write_test_file(self, output_dir: Path, test_style: str = "pytest") -> Tuple[bool, str]:
        """
        Generate and write a test file.
        
        Args:
            output_dir: Directory to write the test file
            test_style: Test style ('pytest' or 'unittest')
            
        Returns:
            Tuple of (success, message)
        """
        # TODO: Generate the test code
        # TODO: Write to the appropriate file in the output directory
        # TODO: Return success/failure and message
        pass

class MockTestFunction:
    """A class to create mock objects for testing."""
    
    def __init__(self, return_value: Any = None, side_effect: Optional[Callable] = None):
        """
        Initialize the mock function.
        
        Args:
            return_value: Value to return when called
            side_effect: Function to call when mock is called
        """
        self.return_value = return_value
        self.side_effect = side_effect
        self.calls = []
    
    def __call__(self, *args, **kwargs):
        """
        Call the mock function.
        
        Args:
            *args: Positional arguments
            **kwargs: Keyword arguments
            
        Returns:
            Return value or side effect result
        """
        self.calls.append((args, kwargs))
        if self.side_effect:
            return self.side_effect(*args, **kwargs)
        return self.return_value
    
    def called_with(self, *args, **kwargs) -> bool:
        """
        Check if the mock was called with specific arguments.
        
        Args:
            *args: Positional arguments
            **kwargs: Keyword arguments
            
        Returns:
            True if called with the specified arguments
        """
        return (args, kwargs) in self.calls
    
    def reset(self):
        """Reset the mock's call history."""
        self.calls = []

if __name__ == "__main__":
    # Example usage
    print("Python Testing Tool")
    print("------------------")
    
    # Generate test if requested
    if len(sys.argv) > 1 and sys.argv[1] == "generate":
        function_name = sys.argv[2] if len(sys.argv) > 2 else "example_function"
        module_name = sys.argv[3] if len(sys.argv) > 3 else "example_module"
        test_style = sys.argv[4] if len(sys.argv) > 4 else "pytest"
        
        if test_style == "unittest":
            test_code = create_unittest(function_name, module_name)
        else:
            test_code = create_pytest(function_name, module_name)
        
        print(f"\nGenerated {test_style} for {function_name}:\n")
        print(test_code)
    
    # Run tests if requested
    if len(sys.argv) > 1 and sys.argv[1] == "run":
        test_dir = Path(sys.argv[2]) if len(sys.argv) > 2 else Path.cwd() / "tests"
        pattern = sys.argv[3] if len(sys.argv) > 3 else "test_*.py"
        
        success, results = run_tests(test_dir, pattern)
        
        print("\nTest Results:")
        print(f"Total tests: {results.get('total', 0)}")
        print(f"Passed: {results.get('passed', 0)}")
        print(f"Failed: {results.get('failed', 0)}")
        print(f"Skipped: {results.get('skipped', 0)}")
        
        if results.get('failures', []):
            print("\nFailures:")
            for failure in results.get('failures', []):
                print(f"  {failure}")
    
    # Check coverage if requested
    if len(sys.argv) > 1 and sys.argv[1] == "coverage":
        test_dir = Path(sys.argv[2]) if len(sys.argv) > 2 else Path.cwd() / "tests"
        source_dir = Path(sys.argv[3]) if len(sys.argv) > 3 else Path.cwd() / "src"
        
        success, results = check_coverage(test_dir, source_dir)
        
        print("\nCoverage Results:")
        print(f"Total coverage: {results.get('total_coverage', 0):.1f}%")
        print(f"Files analyzed: {results.get('files', 0)}")
        
        if results.get('file_coverage', {}):
            print("\nCoverage by file:")
            for file, coverage in results.get('file_coverage', {}).items():
                print(f"  {file}: {coverage:.1f}%")
    
    # Auto-generate tests for a file if requested
    if len(sys.argv) > 1 and sys.argv[1] == "autotest":
        source_file = Path(sys.argv[2]) if len(sys.argv) > 2 else None
        
        if source_file and source_file.exists():
            generator = TestGenerator(source_file)
            analysis = generator.analyze_code()
            
            print(f"\nAnalysis of {source_file.name}:")
            print(f"Functions: {len(analysis.get('functions', []))}")
            print(f"Classes: {len(analysis.get('classes', []))}")
            
            test_code = generator.generate_test_file()
            print("\nGenerated test file:")
            print(test_code[:500] + "..." if len(test_code) > 500 else test_code)
        else:
            print("Please specify a valid source file to analyze.")
