import os
from flask import Flask
from flask import ( redirect, url_for, session )
import secrets

# From flask tutorial,
# https://flask.palletsprojects.com/en/3.0.x/tutorial/factory/
from flask import Flask

# https://flask-cors.readthedocs.io/en/latest/
#from flask_cors import CORS

# Factory for creating the app object.  Available throughout the app.
def create_app(test_config=None):
    # create and configure the app
    app = Flask(__name__, instance_relative_config=True)
    app.config.from_mapping(
        SECRET_KEY=secrets.token_bytes(),
        DATABASE=os.path.join(app.instance_path, 'counter.sqlite')
    )

    app.config.from_pyfile('config.py', silent=True)

    # ensure the instance folder exists
    try:
        os.makedirs(app.instance_path)
    except OSError:
        pass
    
    from . import db
    db.init_app(app)

    from . import gen
    app.register_blueprint(gen.bp)

    from . import register
    app.register_blueprint(register.bp)

    @app.route("/")
    def home():
        return redirect(url_for("gen.init"))

    return app