import flask_apscheduler
from feedgen.feed import FeedGenerator
from flask import Flask
from flask_migrate import Migrate
from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()
migrate = Migrate()


def create_app():
    APP = Flask(__name__)
    scheduler = flask_apscheduler.APScheduler()
    scheduler.api_enabled = True
    scheduler.init_app(APP)
    scheduler.start()
    APP.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:///schedule.db"
    APP.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False

    db.init_app(APP)
    migrate.init_app(APP, db, render_as_batch=True)

    create_rss_feed()

    @scheduler.task("interval", id="update", minutes=10)
    def update():
        update_rss_feed()

    return APP


def create_rss_feed():
    print("creating rss feed")
    fg = FeedGenerator()
    fg.id("http://crunk.website")
    fg.title("Crunk website")
    fg.author({"name": "John Doe", "email": "john@example.de"})
    fg.link(href="http://crunk.website", rel="alternate")
    fg.subtitle("Some things crunk is doing!")
    fg.link(href="http://crunk.website/test.atom", rel="self")
    fg.language("en")
    atomfeed = fg.atom_str(pretty=True)
    rssfeed = fg.rss_str(pretty=True)
    fg.atom_file("static/atom.xml")
    fg.rss_file("static/rss.xml")


def update_rss_feed():
    print("updating rss feed")