"""
deploy_file_browser.py - Deploy File Browser Integration
=========================================================

This script deploys the file browser integration to your existing app.

Usage:
    python deploy_file_browser.py

Features:
    - Creates missing directories
    - Backs up existing files
    - Deploys new file browser
    - Validates deployment

Author: AI Lab Team
Version: 1.0
"""

import os
import shutil
from datetime import datetime
from pathlib import Path


def create_backup(filepath: str) -> str:
    """Create backup of existing file."""
    if not os.path.exists(filepath):
        return None
    
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    backup_dir = "backups"
    os.makedirs(backup_dir, exist_ok=True)
    
    filename = os.path.basename(filepath)
    backup_path = os.path.join(backup_dir, f"{filename}.backup_{timestamp}")
    
    shutil.copy2(filepath, backup_path)
    print(f"✅ Backed up: {filepath} -> {backup_path}")
    
    return backup_path


def create_required_directories():
    """Create all required directories."""
    required_dirs = [
        "outputs",
        "outputs/conversations",
        "outputs/user_artifacts",
        "outputs/feedback",
        "uploads",
        "conversations",
        "logs",
        "backups"
    ]
    
    print("\n📁 Creating required directories...")
    
    for directory in required_dirs:
        try:
            os.makedirs(directory, exist_ok=True)
            print(f"  ✅ {directory}/")
        except Exception as e:
            print(f"  ❌ Failed: {directory}/ - {e}")
    
    print()


def validate_deployment():
    """Validate that deployment was successful."""
    print("\n🔍 Validating deployment...")
    
    checks = [
        ("file_browser_manager.py", "File Browser Module"),
        ("outputs/conversations/", "Conversations Directory"),
        ("outputs/user_artifacts/", "User Artifacts Directory"),
    ]
    
    all_ok = True
    
    for path, description in checks:
        if os.path.exists(path):
            print(f"  ✅ {description}")
        else:
            print(f"  ❌ {description} - NOT FOUND")
            all_ok = False
    
    print()
    
    return all_ok


def create_file_browser_module():
    """Create the file_browser_manager.py module."""
    
    # Check if already exists
    if os.path.exists("file_browser_manager.py"):
        print("⚠️  file_browser_manager.py already exists")
        response = input("Overwrite? (y/n): ")
        if response.lower() != 'y':
            print("Skipped file_browser_manager.py")
            return False
        
        create_backup("file_browser_manager.py")
    
    print("✅ Ready to create file_browser_manager.py")
    print("   Please copy the File Browser Manager artifact code")
    return True


def update_app_gradio():
    """Update app_gradio.py with file browser integration."""
    
    if not os.path.exists("app_gradio.py"):
        print("❌ app_gradio.py not found!")
        return False
    
    # Backup existing
    create_backup("app_gradio.py")
    
    print("✅ Backed up app_gradio.py")
    print("   Please replace with updated version from artifacts")
    
    return True


def show_post_deployment_instructions():
    """Show instructions after deployment."""
    print("\n" + "=" * 60)
    print("POST-DEPLOYMENT INSTRUCTIONS")
    print("=" * 60)
    print()
    print("1. Copy file_browser_manager.py from the artifact")
    print("   Save as: file_browser_manager.py")
    print()
    print("2. Copy updated app_gradio.py from the artifact")
    print("   Save as: app_gradio.py (will replace existing)")
    print()
    print("3. Restart your application:")
    print("   python app_gradio.py")
    print()
    print("4. Test the file browser:")
    print("   - Generate some files")
    print("   - Click the 'File Browser' tab")
    print("   - Try downloading files")
    print()
    print("5. If issues occur, restore from backups/ directory")
    print()
    print("=" * 60)


def main():
    """Main deployment process."""
    print("=" * 60)
    print("FILE BROWSER INTEGRATION DEPLOYMENT")
    print("=" * 60)
    print()
    print("This will:")
    print("  1. Create required directories")
    print("  2. Backup existing files")
    print("  3. Guide you through integration")
    print()
    
    response = input("Continue? (y/n): ")
    if response.lower() != 'y':
        print("Deployment cancelled.")
        return
    
    # Step 1: Create directories
    create_required_directories()
    
    # Step 2: Prepare file browser module
    create_file_browser_module()
    
    # Step 3: Update app_gradio
    update_app_gradio()
    
    # Step 4: Validate
    validate_deployment()
    
    # Step 5: Show instructions
    show_post_deployment_instructions()
    
    print("✅ Deployment preparation complete!")
    print()


if __name__ == "__main__":
    main()