#!/usr/bin/env python3
"""
Version Compatibility Test Script
Tests that all dependencies are compatible and can import successfully
"""

import sys
import subprocess
import importlib.util

def check_package_version(package_name, min_version=None, max_version=None):
    """Check if a package is installed and within version range"""
    try:
        package = importlib.import_module(package_name)
        version = getattr(package, '__version__', 'unknown')
        print(f"✅ {package_name}: {version}")
        return True
    except ImportError as e:
        print(f"❌ {package_name}: Not installed ({e})")
        return False
    except Exception as e:
        print(f"⚠️ {package_name}: Error checking version ({e})")
        return False

def test_torch_device_mesh():
    """Test the specific issue that caused the previous error"""
    try:
        import torch
        if hasattr(torch, 'distributed') and hasattr(torch.distributed, 'device_mesh'):
            print("✅ torch.distributed.device_mesh: Available")
            return True
        else:
            print("⚠️ torch.distributed.device_mesh: Not available (expected for torch < 2.2.0)")
            return True  # This is expected and OK
    except Exception as e:
        print(f"❌ torch.distributed.device_mesh: Error ({e})")
        return False

def test_transformers_mistral():
    """Test if transformers can import mistral models without device_mesh"""
    try:
        from transformers import AutoTokenizer, AutoModelForCausalLM
        print("✅ transformers.AutoTokenizer: OK")
        print("✅ transformers.AutoModelForCausalLM: OK")
        
        # Test specific model imports that failed before
        try:
            # This should not fail with compatible versions
            from transformers.models.mistral import modeling_mistral
            print("✅ transformers.models.mistral.modeling_mistral: OK")
        except ImportError as e:
            if "device_mesh" in str(e):
                print("❌ transformers.models.mistral: Still has device_mesh issue")
                return False
            else:
                print(f"⚠️ transformers.models.mistral: Other import issue ({e})")
        
        return True
    except Exception as e:
        print(f"❌ transformers imports: Error ({e})")
        return False

def test_tokenizer_compatibility():
    """Test tokenizer creation (the enum error)"""
    try:
        from transformers import AutoTokenizer
        
        # Test with a simple, reliable model first
        tokenizer = AutoTokenizer.from_pretrained("microsoft/DialoGPT-medium")
        print("✅ DialoGPT tokenizer: OK")
        
        # Test if we can handle mistral tokenizers
        try:
            tokenizer = AutoTokenizer.from_pretrained("mistralai/Mistral-7B-Instruct-v0.1")
            print("✅ Mistral tokenizer: OK")
        except Exception as e:
            print(f"⚠️ Mistral tokenizer: {e}")
            
        return True
    except Exception as e:
        print(f"❌ Tokenizer test: {e}")
        return False

def main():
    print("🧪 Version Compatibility Test")
    print("=" * 50)
    
    # Test core packages
    print("\n📦 Package Versions:")
    check_package_version("torch")
    check_package_version("transformers") 
    check_package_version("accelerate")
    check_package_version("bitsandbytes")
    check_package_version("gradio")
    
    print("\n🔍 Specific Compatibility Tests:")
    
    # Test the device_mesh issue
    test_torch_device_mesh()
    
    # Test transformers imports
    test_transformers_mistral()
    
    # Test tokenizer enum issue
    test_tokenizer_compatibility()
    
    print("\n" + "=" * 50)
    print("✅ If all tests passed, version compatibility is good!")
    print("❌ If tests failed, there may still be version conflicts")

if __name__ == "__main__":
    main()