from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from flask_migrate import Migrate
from .config import db as db_config

db = SQLAlchemy()
migrate = Migrate()

def create_app():
    app = Flask(__name__)
    app.config['SECRET_KEY'] = '//'
    app.config["SQLALCHEMY_DATABASE_URI"] = db_config.SQL_URI


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

    login_manager = LoginManager()
    login_manager.login_view = 'auth.login'
    login_manager.init_app(app)

    from .models import User

    @login_manager.user_loader
    def load_user(user_id):
        return User.query.get(int(user_id))
    
    from . import models
    with app.app_context():
        db.create_all()

    # blueprint for auth routes in our app
    from .auth import auth as auth_blueprint
    app.register_blueprint(auth_blueprint)

    # blueprint for non-auth parts of app
    from .main import main as main_blueprint
    app.register_blueprint(main_blueprint)

    # blueprint for chatbot
    from .chatbot import chatbot as chatbot_blueprint
    app.register_blueprint(chatbot_blueprint)

    return app