validate_modernization.py

"""
Modern Python demonstration - basic validation test without external dependencies.

This script shows the improvements made to the codebase structure and validates
that the modernization follows Python best practices.
"""

import sys
import os
from typing import List, Dict, Any
from dataclasses import dataclass


@dataclass
class ModernizationSummary:
    """Summary of modernization improvements applied to the codebase."""
    package_structure_created: bool = False
    type_hints_added: bool = False
    error_handling_improved: bool = False
    documentation_enhanced: bool = False
    validation_functions_added: bool = False
    
    
def validate_package_structure() -> bool:
    """Validate that the modern package structure was created."""
    base_path = "/home/runner/work/ComputationalPhysics2016/ComputationalPhysics2016"
    
    required_dirs = [
        "computational_physics",
        "computational_physics/core",
        "computational_physics/utils"
    ]
    
    required_files = [
        "computational_physics/__init__.py",
        "computational_physics/core/__init__.py",
        "computational_physics/core/quantum_mechanics.py",
        "computational_physics/utils/__init__.py",
        "computational_physics/utils/physics_constants.py",
        "computational_physics/utils/validation.py"
    ]
    
    print("Validating package structure:")
    
    # Check directories
    for dir_path in required_dirs:
        full_path = os.path.join(base_path, dir_path)
        exists = os.path.isdir(full_path)
        print(f"  📁 {dir_path}: {'✓' if exists else '✗'}")
        if not exists:
            return False
    
    # Check files  
    for file_path in required_files:
        full_path = os.path.join(base_path, file_path)
        exists = os.path.isfile(full_path)
        print(f"  📄 {file_path}: {'✓' if exists else '✗'}")
        if not exists:
            return False
            
    return True


def analyze_type_annotations() -> Dict[str, int]:
    """Analyze type annotation coverage in the new modules."""
    base_path = "/home/runner/work/ComputationalPhysics2016/ComputationalPhysics2016"
    
    files_to_check = [
        "computational_physics/core/quantum_mechanics.py",
        "computational_physics/utils/validation.py",
        "computational_physics/utils/physics_constants.py"
    ]
    
    results = {}
    
    for file_path in files_to_check:
        full_path = os.path.join(base_path, file_path)
        if not os.path.exists(full_path):
            results[file_path] = 0
            continue
            
        with open(full_path, 'r', encoding='utf-8') as f:
            content = f.read()
            
        # Count function definitions with type hints
        lines = content.split('\n')
        typed_functions = 0
        total_functions = 0
        
        for line in lines:
            stripped = line.strip()
            if stripped.startswith('def ') and '(' in stripped:
                total_functions += 1
                # Check for type annotations (: or ->)
                if ':' in stripped or '->' in stripped:
                    typed_functions += 1
        
        coverage = (typed_functions / total_functions * 100) if total_functions > 0 else 0
        results[file_path] = coverage
        
        print(f"Type annotation coverage in {file_path}: {coverage:.1f}% ({typed_functions}/{total_functions})")
    
    return results


def validate_error_handling() -> bool:
    """Check that error handling has been improved."""
    base_path = "/home/runner/work/ComputationalPhysics2016/ComputationalPhysics2016"
    
    files_to_check = [
        "computational_physics/core/quantum_mechanics.py",
        "computational_physics/utils/validation.py"
    ]
    
    error_patterns = [
        "raise ValueError",
        "if.*<=.*0:",
        "if.*>=.*:",
        "if len(",
        "ValueError("
    ]
    
    print("Validating error handling improvements:")
    
    for file_path in files_to_check:
        full_path = os.path.join(base_path, file_path)
        if not os.path.exists(full_path):
            print(f"  ✗ {file_path}: File not found")
            return False
            
        with open(full_path, 'r', encoding='utf-8') as f:
            content = f.read()
            
        error_checks_found = 0
        for pattern in error_patterns:
            if pattern in content:
                error_checks_found += 1
                
        print(f"  ✓ {file_path}: {error_checks_found} error handling patterns found")
        
    return True


def validate_documentation_improvements() -> bool:
    """Check that documentation has been enhanced."""
    base_path = "/home/runner/work/ComputationalPhysics2016/ComputationalPhysics2016"
    
    file_path = "computational_physics/core/quantum_mechanics.py"
    full_path = os.path.join(base_path, file_path)
    
    if not os.path.exists(full_path):
        return False
        
    with open(full_path, 'r', encoding='utf-8') as f:
        content = f.read()
    
    # Check for modern docstring patterns
    docstring_patterns = [
        '"""',
        'Args:',
        'Returns:',
        'Raises:',
        'Example:'
    ]
    
    patterns_found = sum(1 for pattern in docstring_patterns if pattern in content)
    
    print(f"Documentation improvements: {patterns_found}/{len(docstring_patterns)} patterns found")
    
    return patterns_found >= 4  # Require most patterns to be present


def check_legacy_compatibility() -> bool:
    """Verify that legacy functions still work."""
    base_path = "/home/runner/work/ComputationalPhysics2016/ComputationalPhysics2016"
    
    # Check that quantenmechanik.py was updated with compatibility layer
    quantum_file = os.path.join(base_path, "quantenmechanik.py")
    
    if not os.path.exists(quantum_file):
        return False
        
    with open(quantum_file, 'r', encoding='utf-8') as f:
        content = f.read()
    
    # Check for modernization indicators
    indicators = [
        "from typing import",
        "Legacy function",
        "_MODERN_AVAILABLE",
        "def diskretisierung(",
        "def diagonalisierung("
    ]
    
    found_indicators = sum(1 for indicator in indicators if indicator in content)
    
    print(f"Legacy compatibility: {found_indicators}/{len(indicators)} modernization indicators found")
    
    return found_indicators >= 3


def main() -> None:
    """Run all validation tests for the modernization."""
    print("🔬 Validating ComputationalPhysics2016 Modernization")
    print("=" * 60)
    
    summary = ModernizationSummary()
    
    # Test package structure
    summary.package_structure_created = validate_package_structure()
    print()
    
    # Test type annotations
    type_coverage = analyze_type_annotations()
    summary.type_hints_added = all(coverage > 50 for coverage in type_coverage.values())
    print()
    
    # Test error handling
    summary.error_handling_improved = validate_error_handling()
    print()
    
    # Test documentation
    summary.documentation_enhanced = validate_documentation_improvements()
    print()
    
    # Test legacy compatibility
    legacy_compatible = check_legacy_compatibility()
    print()
    
    # Summary
    print("📊 Modernization Summary:")
    print(f"  ✓ Package structure: {'✓' if summary.package_structure_created else '✗'}")
    print(f"  ✓ Type hints added: {'✓' if summary.type_hints_added else '✗'}")
    print(f"  ✓ Error handling improved: {'✓' if summary.error_handling_improved else '✗'}")
    print(f"  ✓ Documentation enhanced: {'✓' if summary.documentation_enhanced else '✗'}")
    print(f"  ✓ Legacy compatibility: {'✓' if legacy_compatible else '✗'}")
    
    total_improvements = sum([
        summary.package_structure_created,
        summary.type_hints_added,
        summary.error_handling_improved,
        summary.documentation_enhanced,
        legacy_compatible
    ])
    
    print(f"\n🎯 Modernization Score: {total_improvements}/5 ({total_improvements/5*100:.0f}%)")
    
    if total_improvements >= 4:
        print("🎉 Modernization successfully implemented!")
        return True
    else:
        print("⚠️  Some modernization aspects need attention.")
        return False


if __name__ == "__main__":
    success = main()
    sys.exit(0 if success else 1)