"""VenueFlow — Flask application factory."""

import logging
from flask import Flask, redirect, url_for, render_template
from config import get_config

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
)
logger = logging.getLogger(__name__)


def create_app(config_class=None):
    """Application factory."""
    app = Flask(__name__)

    # Load configuration
    if config_class is None:
        config_class = get_config()
    app.config.from_object(config_class)

    # ─── Security Headers ────────────────────────────────────────────────
    @app.after_request
    def set_security_headers(response):
        response.headers["X-Content-Type-Options"] = "nosniff"
        response.headers["X-Frame-Options"] = "DENY"
        response.headers["X-XSS-Protection"] = "1; mode=block"
        response.headers["Referrer-Policy"] = "strict-origin-when-cross-origin"
        if not app.debug:
            response.headers["Strict-Transport-Security"] = (
                "max-age=31536000; includeSubDomains"
            )
        return response

    # ─── Initialize Services ─────────────────────────────────────────────
    from services.firebase_service import init_firebase
    from services.gemini_service import init_gemini
    from services.translation_service import init_translation

    init_firebase(app)
    init_gemini(app)
    init_translation(app)

    # ─── Initialize Demo Data ────────────────────────────────────────────
    from services.simulator import (
        create_demo_venue,
        create_demo_queue_stations,
        create_demo_event,
        Simulator,
    )
    from services.crowd_service import CrowdService
    from services.queue_service import QueueService
    from services.maps_service import MapsService
    from services.notification_service import NotificationService

    venue = create_demo_venue()
    event = create_demo_event()
    crowd_service = CrowdService()
    queue_service = QueueService()
    maps_service = MapsService(venue)
    notification_service = NotificationService()

    # Register queue stations
    queue_stations = create_demo_queue_stations()
    queue_service.register_stations(queue_stations)

    # Create simulator
    simulator = Simulator(venue, queue_service, crowd_service, notification_service, event)

    # Wire SSE broadcasting
    from blueprints.sse import broadcast_update

    def on_sim_update():
        broadcast_update({
            "venue": venue.to_dict(),
            "event": event.to_dict(),
            "sim_status": simulator.get_status(),
        })

    simulator.set_update_callback(on_sim_update)

    # Store services in app config for blueprint access
    app.config["VENUE_OBJ"] = venue
    app.config["EVENT_OBJ"] = event
    app.config["CROWD_SERVICE"] = crowd_service
    app.config["QUEUE_SERVICE"] = queue_service
    app.config["MAPS_SERVICE"] = maps_service
    app.config["NOTIFICATION_SERVICE"] = notification_service
    app.config["SIMULATOR_OBJ"] = simulator

    # Run initial tick to populate data
    simulator.tick()

    # ─── Register Blueprints ─────────────────────────────────────────────
    from blueprints.auth import auth_bp
    from blueprints.attendee import attendee_bp
    from blueprints.operator import operator_bp
    from blueprints.api import api_bp
    from blueprints.sse import sse_bp

    app.register_blueprint(auth_bp)
    app.register_blueprint(attendee_bp)
    app.register_blueprint(operator_bp)
    app.register_blueprint(api_bp)
    app.register_blueprint(sse_bp)

    # ─── Root Route ──────────────────────────────────────────────────────
    @app.route("/")
    def index():
        return redirect(url_for("auth.login"))

    # ─── Error Handlers ──────────────────────────────────────────────────
    @app.errorhandler(404)
    def not_found(e):
        return render_template("errors/404.html"), 404

    @app.errorhandler(500)
    def server_error(e):
        return render_template("errors/500.html"), 500

    logger.info("🏟️ VenueFlow app created successfully")
    return app


# ─── Entry Point ─────────────────────────────────────────────────────────────

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