#!/usr/bin/env python3
"""
Simple validation script for TransitApp MCP Server
Checks code structure without running full tests
"""

import os
import sys
import ast

def validate_file_exists(filename):
    """Check if required file exists"""
    if os.path.exists(filename):
        print(f"✅ {filename} exists")
        return True
    else:
        print(f"❌ {filename} missing")
        return False

def validate_python_syntax(filename):
    """Check if Python file has valid syntax"""
    try:
        with open(filename, 'r') as f:
            ast.parse(f.read())
        print(f"✅ {filename} has valid syntax")
        return True
    except SyntaxError as e:
        print(f"❌ {filename} has syntax error: {e}")
        return False

def check_readme_requirements():
    """Check README has required elements"""
    try:
        with open('README.md', 'r') as f:
            content = f.read()
        
        checks = {
            'sdk: gradio': 'sdk: gradio' in content,
            'mcp-server-track tag': 'mcp-server-track' in content,
            'emoji': 'emoji:' in content,
            'title': 'title:' in content,
        }
        
        for name, passed in checks.items():
            if passed:
                print(f"✅ README has {name}")
            else:
                print(f"❌ README missing {name}")
        
        return all(checks.values())
    except Exception as e:
        print(f"❌ Error checking README: {e}")
        return False

def check_app_structure():
    """Check app.py has required functions"""
    try:
        with open('app.py', 'r') as f:
            content = f.read()
        
        required_functions = [
            'get_nearby_transit',
            'plan_trip',
            'get_realtime_vehicle_location',
            'get_service_alerts',
            'compare_trip_modes',
            'search_stops_and_stations'
        ]
        
        for func in required_functions:
            if f'def {func}' in content:
                print(f"✅ Function {func} exists")
            else:
                print(f"❌ Function {func} missing")
                return False
        
        return True
    except Exception as e:
        print(f"❌ Error checking app.py: {e}")
        return False

def main():
    """Run all validation checks"""
    print("=" * 60)
    print("TransitApp MCP Server - Structure Validation")
    print("=" * 60)
    print()
    
    checks = []
    
    # Check required files exist
    print("Checking required files...")
    checks.append(validate_file_exists('app.py'))
    checks.append(validate_file_exists('requirements.txt'))
    checks.append(validate_file_exists('README.md'))
    checks.append(validate_file_exists('.env.example'))
    print()
    
    # Check Python syntax
    print("Checking Python syntax...")
    checks.append(validate_python_syntax('app.py'))
    if os.path.exists('test_server.py'):
        checks.append(validate_python_syntax('test_server.py'))
    print()
    
    # Check README requirements
    print("Checking README requirements...")
    checks.append(check_readme_requirements())
    print()
    
    # Check app structure
    print("Checking app.py structure...")
    checks.append(check_app_structure())
    print()
    
    # Summary
    print("=" * 60)
    print("VALIDATION SUMMARY")
    print("=" * 60)
    passed = sum(checks)
    total = len(checks)
    print(f"Checks Passed: {passed}/{total}")
    print(f"Success Rate: {passed/total*100:.1f}%")
    print()
    
    if passed == total:
        print("✅ All validation checks passed!")
        print("   Your project is ready for HuggingFace Spaces deployment!")
        print()
        print("Next steps:")
        print("1. Deploy to HuggingFace Spaces")
        print("2. Record demo video")
        print("3. Submit to hackathon")
        return 0
    else:
        print(f"⚠️  {total - passed} check(s) failed.")
        print("   Review errors above and fix issues.")
        return 1

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