"""Flask application factory."""

from __future__ import annotations

from datetime import timedelta

from flask import Flask, jsonify
from flask.typing import ResponseReturnValue

from mimic.api import register_blueprints
from mimic.auth.identity import load_user
from mimic.config import Settings, get_settings
from mimic.extensions import db, login_manager, migrate, socketio
from mimic.logging import configure_logging


def create_app(settings: Settings | None = None) -> Flask:
    settings = settings or get_settings()
    configure_logging(settings.log_level, as_json=settings.log_json)

    app = Flask(__name__)
    app.config.update(
        SECRET_KEY=settings.secret_key.get_secret_value(),
        SQLALCHEMY_DATABASE_URI=settings.database_url,
        SQLALCHEMY_TRACK_MODIFICATIONS=False,
        SESSION_COOKIE_SECURE=settings.session_cookie_secure,
        SESSION_COOKIE_SAMESITE=settings.session_cookie_samesite,
        SESSION_COOKIE_HTTPONLY=True,
        PERMANENT_SESSION_LIFETIME=timedelta(minutes=settings.session_lifetime_minutes),
        MIMIC_SETTINGS=settings,
    )

    db.init_app(app)
    migrate.init_app(app, db, directory="src/mimic/db/migrations")
    login_manager.init_app(app)
    login_manager.user_loader(load_user)

    socketio.init_app(
        app,
        cors_allowed_origins=settings.cors_origins or "*",
        async_mode="gevent",
    )

    register_blueprints(app)

    @app.get("/healthz")
    def healthz() -> ResponseReturnValue:
        return jsonify(status="ok"), 200

    return app