#!/usr/bin/env python3
"""
ALwrity Backend Server - Comprehensive Startup Script
Handles setup, dependency installation, and server startup.
Run this from the backend directory to set up and start the FastAPI server.
"""

import os
import sys
import subprocess
import time
from pathlib import Path

def install_requirements():
    """Install required Python packages."""
    print("📦 Installing required packages...")
    
    requirements_file = Path(__file__).parent / "requirements.txt"
    
    try:
        subprocess.check_call([
            sys.executable, "-m", "pip", "install", "-r", str(requirements_file)
        ])
        print("✅ All packages installed successfully!")
        return True
    except subprocess.CalledProcessError as e:
        print(f"❌ Error installing packages: {e}")
        return False

def create_env_file():
    """Create a .env file with default configuration."""
    env_file = Path(__file__).parent / ".env"
    
    if env_file.exists():
        print("ℹ️  .env file already exists")
        return True
    
    print("🔧 Creating .env file with default configuration...")
    
    env_content = """# ALwrity Backend Configuration

# API Keys (Configure these in the onboarding process)
# OPENAI_API_KEY=your_openai_api_key_here
# GEMINI_API_KEY=your_gemini_api_key_here
# ANTHROPIC_API_KEY=your_anthropic_api_key_here
# MISTRAL_API_KEY=your_mistral_api_key_here

# Research API Keys (Optional)
# TAVILY_API_KEY=your_tavily_api_key_here
# SERPER_API_KEY=your_serper_api_key_here
# METAPHOR_API_KEY=your_metaphor_api_key_here
# FIRECRAWL_API_KEY=your_firecrawl_api_key_here

# Server Configuration
HOST=0.0.0.0
PORT=8000
DEBUG=true

# Logging
LOG_LEVEL=INFO
"""
    
    try:
        with open(env_file, 'w') as f:
            f.write(env_content)
        print("✅ .env file created successfully!")
        return True
    except Exception as e:
        print(f"❌ Error creating .env file: {e}")
        return False

def check_dependencies():
    """Check if required dependencies are installed."""
    print("🔍 Checking dependencies...")
    
    required_packages = [
        'fastapi',
        'uvicorn',
        'pydantic',
        'loguru',
        'openai',
        'google.generativeai',
        'anthropic',
        'mistralai'
    ]
    
    missing_packages = []
    
    for package in required_packages:
        try:
            __import__(package.replace('-', '_'))
            print(f"   ✅ {package}")
        except ImportError:
            print(f"   ❌ {package} - MISSING")
            missing_packages.append(package)
    
    if missing_packages:
        print(f"\n❌ Missing packages: {', '.join(missing_packages)}")
        print("Installing missing packages...")
        return install_requirements()
    else:
        print("\n✅ All dependencies are available!")
        return True

def setup_environment():
    """Set up the environment for the backend."""
    print("🔧 Setting up environment...")
    
    # Create necessary directories
    directories = [
        "lib/workspace/alwrity_content",
        "lib/workspace/alwrity_web_research", 
        "lib/workspace/alwrity_prompts",
        "lib/workspace/alwrity_config"
    ]
    
    for directory in directories:
        Path(directory).mkdir(parents=True, exist_ok=True)
        print(f"   ✅ Created directory: {directory}")
    
    # Create .env file if it doesn't exist
    create_env_file()
    
    print("✅ Environment setup complete")

def start_backend():
    """Start the backend server."""
    print("🚀 Starting ALwrity Backend...")
    
    # Set environment variables
    os.environ.setdefault("HOST", "0.0.0.0")
    os.environ.setdefault("PORT", "8000")
    os.environ.setdefault("RELOAD", "true")
    
    host = os.getenv("HOST", "0.0.0.0")
    port = int(os.getenv("PORT", "8000"))
    reload = os.getenv("RELOAD", "true").lower() == "true"
    
    print(f"   📍 Host: {host}")
    print(f"   🔌 Port: {port}")
    print(f"   🔄 Reload: {reload}")
    
    try:
        # Import and run the app
        from app import app
        import uvicorn
        
        print("\n🌐 Backend is starting...")
        print("   📖 API Documentation: http://localhost:8000/api/docs")
        print("   🔍 Health Check: http://localhost:8000/health")
        print("   📊 ReDoc: http://localhost:8000/api/redoc")
        print("\n⏹️  Press Ctrl+C to stop the server")
        print("=" * 60)
        
        uvicorn.run(
            "app:app",
            host=host,
            port=port,
            reload=reload,
            log_level="info"
        )
        
    except KeyboardInterrupt:
        print("\n\n🛑 Backend stopped by user")
    except Exception as e:
        print(f"\n❌ Error starting backend: {e}")
        return False
    
    return True

def main():
    """Main function to set up and start the backend."""
    print("🎯 ALwrity Backend Server")
    print("=" * 40)
    
    # Check if we're in the right directory
    if not os.path.exists("app.py"):
        print("❌ Error: app.py not found. Please run this script from the backend directory.")
        print("   Current directory:", os.getcwd())
        print("   Expected files:", [f for f in os.listdir('.') if f.endswith('.py')])
        return False
    
    # Check and install dependencies
    if not check_dependencies():
        print("❌ Failed to install dependencies")
        return False
    
    # Setup environment
    setup_environment()
    
    # Start backend
    return start_backend()

if __name__ == "__main__":
    success = main()
    if not success:
        sys.exit(1)