"""
Podcast provider for the Bassdrive Archives
"""
from html.parser import HTMLParser
from urllib.parse import unquote

import requests
from feedgen.feed import FeedGenerator

from podcast import BasePodcast
from datetime import datetime
from pytz import UTC


class BassdriveParser(HTMLParser):
    record_link_text = False
    link_url = ''

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.links = []

    def handle_starttag(self, tag, attrs):
        href = ''
        for attr, val in attrs:
            if attr == 'href':
                href = val

        if tag == 'a' and href.find('mp3') != -1:
            self.record_link_text = True
            self.link_url = href

    def handle_data(self, data):
        if self.record_link_text:
            self.links.append((data, self.link_url))
            self.record_link_text = False

    def get_links(self):
        # Reverse to sort in descending date order
        return self.links

    def clear_links(self):
        self.links = []


class BassdriveFeed(BasePodcast):
    def __init__(self, *args, **kwargs):
        self.url = kwargs['url']
        self.logo = kwargs['logo']
        # Get the title and DJ while handling trailing slash
        url_pretty = unquote(self.url)
        elems = filter(lambda x: x, url_pretty.split('/'))
        self.title, self.dj = list(elems)[-1].split(' - ')

    def build_feed(self):
        "Build the feed given our existing URL"
        # Get all the episodes
        page_content = str(requests.get(self.url).content)
        parser = BassdriveParser()
        parser.feed(page_content)
        links = parser.get_links()

        # And turn them into something usable
        fg = FeedGenerator()
        #fg.load_extension('podcast')
        fg.id(self.url)
        fg.title(self.title)
        fg.description(self.title)
        fg.author({'name': self.dj})
        fg.language('en')
        fg.link({'href': self.url, 'rel': 'alternate'})
        fg.logo(self.logo)

        for link in links:
            fe = fg.add_entry()
            fe.author({'name': self.dj})
            fe.title(link[0])
            fe.description(link[0])
            fe.enclosure(self.url + link[1], 0, 'audio/mpeg')

            # Bassdrive always uses date strings of
            # [yyyy.mm.dd] with 0 padding, so that
            # makes our lives easy
            date_start = link[0].find('[')
            date_str = link[0][date_start:date_start+12]
            published = datetime.strptime(date_str, '[%Y.%m.%d]')
            fe.pubdate(UTC.localize(published))
            fe.guid((link[0]))

        parser.clear_links()
        return fg