import os

from flask import Flask, render_template
from werkzeug import SharedDataMiddleware


def create_app():
    app = Flask(__name__, instance_relative_config=True)

    app.config.from_mapping(
        SQLALCHEMY_DATABASE_URI="sqlite:///{}".format(os.path.join(app.instance_path, 'files.sqlite')),
        SQLALCHEMY_TRACK_MODIFICATIONS=False,
        USERNAME='dev',
        PASSWORD='secret',
        SECRET_KEY='1337',
        UPLOAD_FOLDER='uploads'
    )

    app.config.from_pyfile('config.py')
    app.wsgi_app = SharedDataMiddleware(app.wsgi_app, {'/uploads': app.config['UPLOAD_FOLDER']})

    try:
        os.makedirs(app.instance_path)
    except OSError:
        pass

    from files.models import db
    db.init_app(app)

    from files import commands
    commands.init_app(app)

    from files import auth
    app.register_blueprint(auth.bp)

    from files import categories
    app.register_blueprint(categories.bp)

    from files import about
    app.register_blueprint(about.bp)
    app.add_url_rule('/about', endpoint='about')

    from files import files
    app.register_blueprint(files.bp)
    app.add_url_rule('/', endpoint='index')

    return app