from dataclasses import dataclass
from enforce_typing import enforce_types
from typing import List, Set, Optional, Union
from enum import Enum
import datetime
import re
import urllib.parse

class SocialSiteId(Enum):
    REDDIT = 1
    TWITTER = 2
    RSS_FEED = 3
    PAGE_WATCH = 4
    LINKTREE_PAGE = 5
    TWITCH = 6
    WIKIDATA = 7
    SONGKICK_ARTIST = 8
    TUMBLR = 9
    MASTODON_PAGE = 10
    INSTAGRAM_PAGE = 11
    PATREON_PAGE = 12
    ARTSTATION_PAGE = 13
    INPRNT_PAGE = 14
    FACEBOOK_PAGE = 15
    EMAIL = 16

@enforce_types
@dataclass(frozen = True)
class SocialLink(object):
    url: urllib.parse.ParseResult
    social_site_id: SocialSiteId
    social_id: Optional[str]

REDDIT_SUBSCRIPTION_URL = r'^(?:https?:\/\/)?(?:old\.)?reddit\.com\/r\/(\w+)\/?$'
TWITTER_HANDLE_URL = r'^(?:https?:\/\/)?(?:www\.)?twitter\.com\/(\w+)\/?$'
LINKTREE_PAGE_URL = r'^(?:https?:\/\/)?(?:www\.)?linktr\.ee\/(\w+)\/?$'
TWITCH_STREAM_URL = r'^(?:https?:\/\/)?(?:www\.)?twitch\.tv\/(\w+)\/?$'
WIKIDATA_ITEM_URL = r'^(?:https?:\/\/)?(?:www\.)?wikidata\.org\/wiki\/(\w+)\/?$'
SONGKICK_ARTIST_URL = r'^(?:https?:\/\/)?(?:www\.)?songkick\.com\/artists\/(\d+)([\w-]*)\/?$'
TUMBLR_PAGE_URL = r'^(?:https?:\/\/)?(?:www\.)?tumblr\.com\/([\w-]+)(?:\/|\/rss)?\/?$'
TUMBLR_PAGE_URL_2 = r'^(?:https?:\/\/)?(\w+)\.tumblr\.com\/?$'
INSTAGRAM_URL = r'^(?:https?:\/\/)?(?:www\.)?instagram\.com\/([\w_-]+)\/?$'
PATREON_URL = r'^(?:https?:\/\/)?(?:www\.)?patreon\.com\/([\w-]+)\/?$'
ARTSTATION_URL = r'^(?:https?:\/\/)?(?:www\.)?artstation\.com\/([\w-]+)\/?$'
INPRNT_URL = r'^(?:https?:\/\/)?(?:www\.)?inprnt\.com\/gallery\/([\w-]+)\/?$'
MAILTO_URL = r'^mailto:([\w._.]+@[\w._.]+)$'
FACEBOOK_PAGE_URL = r'^(?:https?:\/\/)?(?:www\.)?facebook\.com\/([\w-]+)\/?$'

REGEXES = [
    # Subreddits
    (REDDIT_SUBSCRIPTION_URL, SocialSiteId.REDDIT),

    # Twitter
    (TWITTER_HANDLE_URL, SocialSiteId.TWITTER),

    # Facebook
    (FACEBOOK_PAGE_URL, SocialSiteId.FACEBOOK_PAGE),

    # Linktr.ee
    (LINKTREE_PAGE_URL, SocialSiteId.LINKTREE_PAGE),

    # Twitch.tv
    (TWITCH_STREAM_URL, SocialSiteId.TWITCH),

    # Wikidata
    (WIKIDATA_ITEM_URL, SocialSiteId.WIKIDATA),

    # Songkick
    (SONGKICK_ARTIST_URL, SocialSiteId.SONGKICK_ARTIST),

    # Tumblr
    (TUMBLR_PAGE_URL, SocialSiteId.TUMBLR),
    (TUMBLR_PAGE_URL_2, SocialSiteId.TUMBLR),

    # Instagram
    (INSTAGRAM_URL, SocialSiteId.INSTAGRAM_PAGE),

    # Patreon
    (PATREON_URL, SocialSiteId.PATREON_PAGE),

    # Artstation
    (ARTSTATION_URL, SocialSiteId.ARTSTATION_PAGE),

    # Inprnt
    (INPRNT_URL, SocialSiteId.INPRNT_PAGE),

    # Email
    (MAILTO_URL, SocialSiteId.EMAIL),
]

def determine_social_from_url_internally(url):

    # Regexes
    for (social_site_url_regex, social_site_id) in REGEXES:
        if m := re.match(social_site_url_regex, url):
            return (social_site_id, m.group(1))

    # Mastodon
    if 'mastodon' in url:
        return (SocialSiteId.MASTODON_PAGE, None)

    # Feed (?)
    elif 'feed' in url or 'xml' in url or 'rss' in url or 'atom' in url:
        return (SocialSiteId.RSS_FEED, None)

    return (None, None)

def determine_social_from_url(url):
    parsed_url = urllib.parse.urlparse(url)
    (social_site_id, social_id) = determine_social_from_url_internally(url)

    if not social_site_id:
        return None
    return SocialLink(parsed_url, social_site_id, social_id)

assert determine_social_from_url('http://www.twitter.com/dril').social_id == 'dril'
assert determine_social_from_url('http://worstdril.tumblr.com/')