import asyncio
import os
from argparse import Namespace
import tornado
from src.logger import logger as l
import src.stats as stats


def start_server(settings: list, args: Namespace) -> None:
    logger = l.getChild(__name__)

    def _get_all_feeds():
        return [{ 'rss': sets['name'], 'file': f"/feeds/{sets['rss']}" } for sets in settings if os.path.isfile(f"{args.directory}/{sets['rss']}")]


    class MainHandler(tornado.web.RequestHandler):
        def set_default_headers(self):
            self.set_header("Access-Control-Allow-Origin", "*")
            self.set_header("Access-Control-Allow-Headers", "x-requested-with")
            self.set_header('Access-Control-Allow-Methods', 'GET, OPTIONS')

        def get(self):
            self.render("index.html", feeds=_get_all_feeds(), last_modified_at=stats.get_last_modified_at())


    async def start_web_server():
        logger.info(f"Starting web server on port {args.port}")
        app = tornado.web.Application(
            [
                (r"/", MainHandler),
                (r'/feeds/(.*)', tornado.web.StaticFileHandler, {'path': args.directory}),
            ],
            template_path=os.path.join(os.path.dirname(__file__), "templates"),
            static_path=args.directory,
            debug=args.debug,
        )
        app.listen(args.port)
        await asyncio.Event().wait()

    asyncio.run(start_web_server())