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(
        DATABASE = os.path.join(app.instance_path, 'files.sqlite'),
        USERNAME = 'dev',
        PASSWORD = 'secret',
        SECRET_KEY = '1337',
        UPLOAD_FOLDER = 'uploads',
        ALLOWED_EXTENSIONS = set(['png', 'jpg'])
    )

    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 . import db
    db.init_app(app)

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

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

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

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


    return app