from flask import Flask
from flask_cors import CORS
from flask_migrate import Migrate
from flask_jwt_extended import JWTManager
import logging
import os

from .config import config_by_name
from .models import db


def create_app(config_name=None):
    app = Flask(__name__)

    if config_name is None:
        config_name = os.environ.get("FLASK_ENV", "development")

    app.config.from_object(config_by_name[config_name])

    CORS(app, origins=app.config["CORS_ORIGINS"])

    db.init_app(app)
    migrate = Migrate(app, db)

    jwt = JWTManager(app)

    setup_logging(app)

    register_blueprints(app)

    setup_error_handlers(app)

    return app


def setup_logging(app):
    log_dir = os.path.dirname(app.config["LOG_FILE"])
    if not os.path.exists(log_dir):
        os.makedirs(log_dir)

    logging.basicConfig(
        level=getattr(logging, app.config["LOG_LEVEL"]),
        format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
        handlers=[logging.FileHandler(app.config["LOG_FILE"]), logging.StreamHandler()],
    )


def register_blueprints(app):
    from .api import api_bp

    app.register_blueprint(api_bp, url_prefix="/api")


def setup_error_handlers(app):
    @app.errorhandler(404)
    def not_found(error):
        return {"error": "Not found"}, 404

    @app.errorhandler(500)
    def internal_error(error):
        app.logger.error(f"Internal error: {error}")
        return {"error": "Internal server error"}, 500