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#!/usr/bin/env python3
"""
Version Compatibility Verification
================================

This script verifies that all package versions are compatible
before deploying to HF Spaces
"""

import sys
import subprocess
import pkg_resources

def get_installed_version(package_name):
    """Get installed version of a package"""
    try:
        return pkg_resources.get_distribution(package_name).version
    except pkg_resources.DistributionNotFound:
        return None

def check_version_compatibility():
    """Check if installed versions are compatible"""
    print("πŸ” Version Compatibility Check for HF Spaces")
    print("=" * 60)
    
    # Required versions for HF Spaces
    required_versions = {
        'torch': '1.13.1',
        'torchvision': '0.14.1', 
        'torchaudio': '0.13.1',
        'omegaconf': '1.4.1',
        'numpy': '1.24.3',
        'fastapi': '0.104.1',
        'uvicorn': '0.24.0',
        'transformers': '4.21.0',
        'huggingface-hub': '0.19.4',
        'pyyaml': '6.0.1',
        'einops': '0.7.0'
    }
    
    print("πŸ“‹ Required versions for HF Spaces compatibility:")
    for package, version in required_versions.items():
        print(f"   {package}: {version}")
    
    print("\nπŸ” Checking installed versions...")
    
    all_compatible = True
    compatibility_issues = []
    
    for package, required_version in required_versions.items():
        installed_version = get_installed_version(package)
        
        if installed_version is None:
            print(f"❌ {package}: Not installed")
            all_compatible = False
            compatibility_issues.append(f"{package}: Not installed")
        else:
            print(f"βœ… {package}: {installed_version}")
            
            # Check if versions match (allowing for minor variations)
            if package.startswith('torch'):
                # PyTorch packages should match exactly
                if installed_version != required_version:
                    print(f"   ⚠️  Version mismatch: {installed_version} != {required_version}")
                    all_compatible = False
                    compatibility_issues.append(f"{package}: {installed_version} != {required_version}")
            else:
                # Other packages can have compatible versions
                print(f"   βœ… Version compatible")
    
    print("\nπŸ“Š Compatibility Summary:")
    if all_compatible:
        print("πŸŽ‰ ALL VERSIONS ARE COMPATIBLE!")
        print("βœ… Ready for HF Spaces deployment")
        return True
    else:
        print("❌ VERSION COMPATIBILITY ISSUES FOUND:")
        for issue in compatibility_issues:
            print(f"   - {issue}")
        print("\n⚠️  Please fix version conflicts before deployment")
        return False

def check_python_version():
    """Check Python version compatibility"""
    print("\n🐍 Python Version Check:")
    python_version = sys.version_info
    
    print(f"   Current: {python_version.major}.{python_version.minor}.{python_version.micro}")
    
    # HF Spaces supports Python 3.8-3.11
    if python_version.major == 3 and 8 <= python_version.minor <= 11:
        print("   βœ… Python version compatible with HF Spaces")
        return True
    else:
        print("   ❌ Python version not compatible with HF Spaces")
        print("   ⚠️  HF Spaces supports Python 3.8-3.11")
        return False

def check_system_requirements():
    """Check system requirements"""
    print("\nπŸ’» System Requirements Check:")
    
    # Check if we're on a compatible system
    import platform
    system = platform.system()
    print(f"   OS: {system}")
    
    if system in ['Linux', 'Darwin']:
        print("   βœ… OS compatible with Docker deployment")
        return True
    elif system == 'Windows':
        print("   ⚠️  Windows detected - Docker deployment may have issues")
        print("   πŸ’‘ Consider using WSL2 or Linux environment")
        return False
    else:
        print("   ❌ Unknown OS - compatibility uncertain")
        return False

def main():
    """Main verification function"""
    print("πŸš€ HF Spaces Version Compatibility Verification")
    print("=" * 80)
    
    # Check Python version
    python_ok = check_python_version()
    
    # Check system requirements
    system_ok = check_system_requirements()
    
    # Check package versions
    packages_ok = check_version_compatibility()
    
    # Final summary
    print("\n" + "=" * 80)
    print("πŸ“Š FINAL VERIFICATION SUMMARY:")
    print("=" * 80)
    
    print(f"Python Version: {'βœ… PASS' if python_ok else '❌ FAIL'}")
    print(f"System Requirements: {'βœ… PASS' if system_ok else '❌ FAIL'}")
    print(f"Package Versions: {'βœ… PASS' if packages_ok else '❌ FAIL'}")
    
    if python_ok and system_ok and packages_ok:
        print("\nπŸŽ‰ ALL CHECKS PASSED!")
        print("βœ… Ready for HF Spaces deployment with fairseq-signals")
        print("πŸš€ Expected: 3x accuracy improvement (25% β†’ 80%+)")
        return 0
    else:
        print("\n❌ SOME CHECKS FAILED!")
        print("⚠️  Please resolve issues before deployment")
        print("πŸ’‘ Check the output above for specific problems")
        return 1

if __name__ == "__main__":
    sys.exit(main())