import os
from app import create_app, db
from app.models import User, Post, PostImage, GPXFile, Comment, Like, PageView, MapRoute

app = create_app()

@app.shell_context_processor
def make_shell_context():
    return {
        'db': db, 
        'User': User, 
        'Post': Post, 
        'PostImage': PostImage,
        'GPXFile': GPXFile,
        'Comment': Comment,
        'Like': Like,
        'PageView': PageView,
        'MapRoute': MapRoute
    }

@app.cli.command()
def init_db():
    """Initialize the database with complete schema."""
    print('Creating all database tables...')
    db.create_all()
    print('✓ Database schema created successfully')

@app.cli.command()
def migrate_db():
    """Apply all database schema migrations to ensure compatibility."""
    from sqlalchemy import text, inspect
    
    try:
        # Get database inspector
        inspector = inspect(db.engine)
        
        print('Starting database schema migration...\n')
        
        # 1. Check and migrate posts table
        if 'posts' in inspector.get_table_names():
            columns = [col['name'] for col in inspector.get_columns('posts')]
            
            if 'media_folder' not in columns:
                db.session.execute(text('ALTER TABLE posts ADD COLUMN media_folder VARCHAR(100)'))
                db.session.commit()
                print('✓ Added media_folder column to posts table')
            
            # Check for other expected columns
            expected = ['title', 'content', 'author_id', 'published', 'created_at']
            for col in expected:
                if col not in columns:
                    print(f'✗ WARNING: Expected column {col} not found in posts table')
        
        # 2. Check and migrate post_images table
        if 'post_images' in inspector.get_table_names():
            columns = [col['name'] for col in inspector.get_columns('post_images')]
            
            if 'is_cover' not in columns:
                db.session.execute(text('ALTER TABLE post_images ADD COLUMN is_cover BOOLEAN DEFAULT 0'))
                db.session.commit()
                print('✓ Added is_cover column to post_images table')
        
        # 3. Check and migrate chat_rooms table
        if 'chat_rooms' in inspector.get_table_names():
            columns = [col['name'] for col in inspector.get_columns('chat_rooms')]
            
            if 'category' not in columns:
                db.session.execute(text('ALTER TABLE chat_rooms ADD COLUMN category VARCHAR(50) DEFAULT "general"'))
                db.session.commit()
                print('✓ Added category column to chat_rooms table')
            
            if 'last_activity' not in columns:
                db.session.execute(text('ALTER TABLE chat_rooms ADD COLUMN last_activity DATETIME DEFAULT CURRENT_TIMESTAMP'))
                db.session.commit()
                print('✓ Added last_activity column to chat_rooms table')
        
        # 4. Check and add GPX statistics columns
        if 'gpx_files' in inspector.get_table_names():
            columns = [col['name'] for col in inspector.get_columns('gpx_files')]
            
            gpx_columns = {
                'total_distance': 'REAL DEFAULT 0.0',
                'elevation_gain': 'REAL DEFAULT 0.0',
                'max_elevation': 'REAL DEFAULT 0.0',
                'min_elevation': 'REAL DEFAULT 0.0',
                'total_points': 'INTEGER DEFAULT 0'
            }
            
            for col_name, col_type in gpx_columns.items():
                if col_name not in columns:
                    db.session.execute(text(f'ALTER TABLE gpx_files ADD COLUMN {col_name} {col_type}'))
                    db.session.commit()
                    print(f'✓ Added {col_name} column to gpx_files table')
        
        # 5. Verify all required tables exist
        required_tables = [
            'users', 'posts', 'post_images', 'gpx_files', 
            'comments', 'likes', 'page_views', 'chat_rooms',
            'chat_messages', 'map_routes', 'password_reset_requests'
        ]
        
        existing_tables = inspector.get_table_names()
        missing_tables = [t for t in required_tables if t not in existing_tables]
        
        if missing_tables:
            print(f'\n✗ WARNING: Missing tables: {missing_tables}')
            print('  Running init-db to create missing tables...')
            db.create_all()
            print('✓ All missing tables created')
        
        print('\n✓ Database migration completed successfully')
        print(f'✓ Total tables: {len(existing_tables)}')
        
    except Exception as e:
        print(f'✗ Migration error: {e}')
        db.session.rollback()
        raise
        print(f'Migration error: {e}')
        db.session.rollback()

@app.cli.command()
def process_gpx_files():
    """Process existing GPX files to extract statistics."""
    from app.utils.gpx_processor import process_gpx_file
    
    gpx_files = GPXFile.query.all()
    processed = 0
    
    for gpx_file in gpx_files:
        try:
            if process_gpx_file(gpx_file):
                processed += 1
                print(f'Processed: {gpx_file.original_name}')
            else:
                print(f'Failed to process: {gpx_file.original_name}')
        except Exception as e:
            print(f'Error processing {gpx_file.original_name}: {e}')
    
    db.session.commit()
    print(f'Processed {processed}/{len(gpx_files)} GPX files')

@app.cli.command()
def set_cover_images():
    """Set cover images for posts that don't have them."""
    posts = Post.query.all()
    updated = 0
    
    for post in posts:
        # Check if post has a cover image
        cover_image = post.images.filter_by(is_cover=True).first()
        if not cover_image:
            # Set the first image as cover if available
            first_image = post.images.first()
            if first_image:
                first_image.is_cover = True
                updated += 1
                print(f'Set cover image for post: {post.title}')
    
    db.session.commit()
    print(f'Updated {updated} posts with cover images')

@app.cli.command()
def create_admin():
    """Create an admin user."""
    admin_email = os.environ.get('ADMIN_EMAIL', 'admin@moto-adv.com')
    admin_password = os.environ.get('ADMIN_PASSWORD', 'admin123')
    
    admin = User.query.filter_by(email=admin_email).first()
    if admin:
        print(f'Admin user {admin_email} already exists.')
        return
    
    admin = User(
        nickname='admin',
        email=admin_email,
        is_admin=True
    )
    admin.set_password(admin_password)
    
    db.session.add(admin)
    db.session.commit()
    print(f'Admin user created: {admin_email}')

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000, debug=True)