"""
Social Share and Care Foundation — Flask Backend
"""
import os
from flask import Flask, jsonify, send_from_directory
from flask_cors import CORS
from config.settings import Config

# Path to the built React frontend (relative to this file's directory)
FRONTEND_DIST = os.path.join(os.path.dirname(__file__), '..', 'frontend', 'dist')


def create_app():
    """Application factory."""
    app = Flask(__name__)
    app.config.from_object(Config)

    # CORS — allow frontend origin
    CORS(app, resources={r"/api/*": {"origins": [Config.FRONTEND_URL, "http://localhost:5173"]}})

    # Register blueprints
    from routes.auth_routes import auth_bp
    from routes.donation_routes import donation_bp
    from routes.campaign_routes import campaign_bp
    from routes.volunteer_routes import volunteer_bp, activity_bp
    from routes.help_request_routes import help_request_bp
    from routes.content_routes import content_bp
    from routes.contact_routes import contact_bp
    from routes.newsletter_routes import newsletter_bp
    from routes.upload_routes import upload_bp

    app.register_blueprint(auth_bp)
    app.register_blueprint(donation_bp)
    app.register_blueprint(campaign_bp)
    app.register_blueprint(volunteer_bp)
    app.register_blueprint(activity_bp)
    app.register_blueprint(help_request_bp)
    app.register_blueprint(content_bp)
    app.register_blueprint(contact_bp)
    app.register_blueprint(newsletter_bp)
    app.register_blueprint(upload_bp)

    # Set max upload size from config
    app.config['MAX_CONTENT_LENGTH'] = app.config.get('MAX_CONTENT_LENGTH', 50 * 1024 * 1024)

    # Health check
    @app.route('/api/health', methods=['GET'])
    def health():
        return jsonify({
            'status': 'ok',
            'service': 'Social Share and Care Foundation API',
            'version': '1.0.0',
        })

    # Error handlers
    @app.errorhandler(404)
    def not_found(e):
        return jsonify({'error': 'Endpoint not found'}), 404

    @app.errorhandler(500)
    def server_error(e):
        return jsonify({'error': 'Internal server error'}), 500

    @app.errorhandler(400)
    def bad_request(e):
        return jsonify({'error': 'Bad request'}), 400

    @app.errorhandler(403)
    def forbidden(e):
        return jsonify({'error': 'Forbidden'}), 403

    # ── Serve React SPA in production ─────────────────────────
    if os.path.isdir(FRONTEND_DIST):
        @app.route('/', defaults={'path': ''})
        @app.route('/<path:path>')
        def serve_spa(path):
            """Serve the React SPA. API routes are handled by blueprints
            (registered before this catch-all), so they take priority."""
            # If a real file exists in dist (JS, CSS, images, etc.), serve it
            file_path = os.path.join(FRONTEND_DIST, path)
            if path and os.path.isfile(file_path):
                return send_from_directory(FRONTEND_DIST, path)
            # Otherwise, return index.html for client-side routing
            return send_from_directory(FRONTEND_DIST, 'index.html')

    return app


# Run the app
app = create_app()

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