import bleach
from bs4 import BeautifulSoup
from bleach.linkifier import LinkifyFilter, build_url_re
from functools import partial
from .get import *
from .patter import pat
from os import path, environ
import re
from mistletoe import markdown
from json import loads, dump
from random import random, choice
import signal
import time
import requests

TLDS = ('ac','ad','ae','aero','af','ag','ai','al','am','an','ao','aq','ar','arpa','as','asia','at','au','aw','ax','az','ba','bb','bd','be','bf','bg','bh','bi','biz','bj','bm','bn','bo','br','bs','bt','bv','bw','by','bz','ca','cafe','cat','cc','cd','cf','cg','ch','ci','ck','cl','club','cm','cn','co','com','coop','cr','cu','cv','cx','cy','cz','de','dj','dk','dm','do','dz','ec','edu','ee','eg','er','es','et','eu','fi','fj','fk','fm','fo','fr','ga','gb','gd','ge','gf','gg','gh','gi','gl','gm','gn','gov','gp','gq','gr','gs','gt','gu','gw','gy','hk','hm','hn','hr','ht','hu','id','ie','il','im','in','info','int','io','iq','ir','is','it','je','jm','jo','jobs','jp','ke','kg','kh','ki','km','kn','kp','kr','kw','ky','kz','la','lb','lc','li','lk','lr','ls','lt','lu','lv','ly','ma','mc','md','me','mg','mh','mil','mk','ml','mm','mn','mo','mobi','mp','mq','mr','ms','mt','mu','museum','mv','mw','mx','my','mz','na','name','nc','ne','net','nf','ng','ni','nl','no','np','nr','nu','nz','om','org','pa','pe','pf','pg','ph','pk','pl','pm','pn','post','pr','pro','ps','pt','pw','py','qa','re','ro','rs','ru','rw','sa','sb','sc','sd','se','sg','sh','si','sj','sk','sl','sm','sn','so','social','sr','ss','st','su','sv','sx','sy','sz','tc','td','tel','tf','tg','th','tj','tk','tl','tm','tn','to','tp','tr','travel','tt','tv','tw','tz','ua','ug','uk','us','uy','uz','va','vc','ve','vg','vi','vn','vu','wf','win','ws','xn','xxx','ye','yt','yu','za','zm','zw')

allowed_tags = ('b','blockquote','br','code','del','em','h1','h2','h3','h4','h5','h6','hr','i','li','ol','p','pre','strong','sub','sup','table','tbody','th','thead','td','tr','ul','marquee','a','span','ruby','rp','rt','spoiler','img','lite-youtube','video','source')

def allowed_attributes(tag, name, value):

	if name == 'style': return True

	if tag == 'marquee':
		if name in ['direction', 'behavior', 'scrollamount']: return True
		if name in {'height', 'width'}:
			try: value = int(value.replace('px', ''))
			except: return False
			if 0 < value <= 250: return True
		return False
	
	if tag == 'a':
		if name == 'href': return True
		if name == 'rel' and value == 'nofollow noopener noreferrer': return True
		if name == 'target' and value == '_blank': return True
		return False

	if tag == 'img':
		if name in ['src','data-src']:
			if value.startswith('/') or value.startswith(f'{SITE_FULL}/') or embed_fullmatch_regex.fullmatch(value): return True
			else: return False

		if name == 'loading' and value == 'lazy': return True
		if name == 'referrpolicy' and value == 'no-referrer': return True
		if name == 'data-bs-toggle' and value == 'tooltip': return True
		if name in ['alt','title','g','b','pat']: return True
		if name == 'class' and value == 'pat-hand': return True
		return False

	if tag == 'lite-youtube':
		if name == 'params' and value.startswith('autoplay=1&modestbranding=1'): return True
		if name == 'videoid': return True
		return False

	if tag == 'video':
		if name == 'controls' and value == '': return True
		if name == 'preload' and value == 'none': return True
		return False

	if tag == 'source':
		if name == 'src' and embed_fullmatch_regex.fullmatch(value): return True
		return False

	if tag == 'p':
		if name == 'class' and value == 'mb-0': return True
		return False

	if tag == 'span':
		if name == 'class' and value in ['pat-container', 'pat-hand']: return True
		if name == 'data-bs-toggle' and value == 'tooltip': return True
		if name == 'title': return True
		if name == 'alt': return True
		return False


url_re = build_url_re(tlds=TLDS, protocols=['http', 'https'])

def callback(attrs, new=False):
	href = attrs[(None, "href")]

	if not href.startswith('/') and not href.startswith(f'{SITE_FULL}/'):
		attrs[(None, "target")] = "_blank"
		attrs[(None, "rel")] = "nofollow noopener noreferrer"	

	return attrs


def handler(signum, frame):
	print("Timeout!")
	raise Exception("Timeout")

def render_emoji(html, regexp, edit, marseys_used=set(), b=False):
	emojis = list(regexp.finditer(html))
	captured = set()

	for i in emojis:
		if i.group(0) in captured: continue
		captured.add(i.group(0))

		emoji = i.group(1).lower()
		attrs = ''
		if b: attrs += ' b'
		if not edit and len(emojis) <= 20 and random() < 0.0025 and ('marsey' in emoji or emoji in marseys_const2): attrs += ' g'

		old = emoji
		emoji = emoji.replace('!','').replace('#','')
		if emoji == 'marseyrandom': emoji = choice(marseys_const2)

		emoji_partial = '<img loading="lazy" data-bs-toggle="tooltip" alt=":{0}:" title=":{0}:" src="{1}"{2}>'
		emoji_html = None

		if emoji.endswith('pat'):
			if path.isfile(f"files/assets/images/emojis/{emoji.replace('pat','')}.webp"):
				attrs += ' pat'
				emoji_html = f'<span class="pat-container" data-bs-toggle="tooltip" alt=":{old}:" title=":{old}:"><img src="/assets/images/pat/hand.webp" class="pat-hand">{emoji_partial.format(old, f"/e/{emoji[:-3]}.webp", attrs)}</span>'
			elif emoji.startswith('@'):
				if u := get_user(emoji[1:-3], graceful=True):
					attrs += ' pat'
					emoji_html = f'<span class="pat-container" data-bs-toggle="tooltip" alt=":{old}:" title=":{old}:"><img src="/assets/images/pat/hand.webp" class="pat-hand">{emoji_partial.format(old, f"/pp/{u.id}", attrs)}</span>'
		elif path.isfile(f'files/assets/images/emojis/{emoji}.webp'):
			emoji_html = emoji_partial.format(old, f'/e/{emoji}.webp', attrs)


		if emoji_html:
			html = re.sub(f'(?<!"){i.group(0)}', emoji_html, html)
	return html


def sanitize(sanitized, alert=False, comment=False, edit=False):

	signal.signal(signal.SIGALRM, handler)
	signal.alarm(1)

	sanitized = linefeeds_regex.sub(r'\1\n\n\2', sanitized)

	sanitized = image_regex.sub(r'\1![](\2)\4', sanitized)

	sanitized = image_check_regex.sub(r'\1', sanitized)

	sanitized = markdown(sanitized)

	sanitized = strikethrough_regex.sub(r'<del>\1</del>', sanitized)

	sanitized = sanitized.replace('‎','').replace('​','').replace("\ufeff", "").replace("𒐪","")

	if alert:
		captured = []
		for i in mention_regex2.finditer(sanitized):
			if i.group(0) in captured: continue
			captured.append(i.group(0))

			u = get_user(i.group(1), graceful=True)
			if u:
				sanitized = sanitized.replace(i.group(0), f'''<p><a href="/id/{u.id}"><img loading="lazy" src="/pp/{u.id}">@{u.username}</a>''')
	else:
		sanitized = reddit_regex.sub(r'\1<a href="https://old.reddit.com/\2" rel="nofollow noopener noreferrer">/\2</a>', sanitized)

		sanitized = sub_regex.sub(r'\1<a href="/\2">/\2</a>', sanitized)

		captured = []
		for i in mention_regex.finditer(sanitized):
			if i.group(0) in captured: continue
			captured.append(i.group(0))

			u = get_user(i.group(2), graceful=True)

			if u and (not (g.v and g.v.any_block_exists(u)) or g.v.admin_level > 1):
				sanitized = sanitized.replace(i.group(0), f'''{i.group(1)}<a href="/id/{u.id}"><img loading="lazy" src="/pp/{u.id}">@{u.username}</a>''')


	sanitized = imgur_regex.sub(r'\1_d.webp?maxwidth=9999&fidelity=high', sanitized)

	soup = BeautifulSoup(sanitized, 'lxml')

	for tag in soup.find_all("img"):
		if tag.get("src") and not tag["src"].startswith('/pp/'):
			tag["loading"] = "lazy"
			tag["data-src"] = tag["src"]
			tag["src"] = "/assets/images/loading.webp"
			tag['alt'] = f'![]({tag["data-src"]})'
			tag['referrerpolicy'] = "no-referrer"

	for tag in soup.find_all("a"):
		if tag.get("href") and fishylinks_regex.fullmatch(str(tag.string)):
			tag.string = tag["href"]


	sanitized = str(soup)
	
	sanitized = spoiler_regex.sub(r'<spoiler>\1</spoiler>', sanitized)
	
	marseys_used = set()

	emojis = list(emoji_regex.finditer(sanitized))
	if len(emojis) > 20: edit = True

	captured = []
	for i in emojis:
		if i.group(0) in captured: continue
		captured.append(i.group(0))

		old = i.group(0)
		if 'marseylong1' in old or 'marseylong2' in old or 'marseyllama1' in old or 'marseyllama2' in old: new = old.lower().replace(">", " class='mb-0'>")
		else: new = old.lower()

		new = render_emoji(new, emoji_regex2, edit, marseys_used, True)

		sanitized = sanitized.replace(old, new)

	emojis = list(emoji_regex3.finditer(sanitized))
	if len(emojis) > 20: edit = True

	sanitized = render_emoji(sanitized, emoji_regex3, edit, marseys_used)

	for rd in ["://reddit.com", "://new.reddit.com", "://www.reddit.com", "://redd.it", "://libredd.it", "://teddit.net"]:
		sanitized = sanitized.replace(rd, "://old.reddit.com")

	sanitized = sanitized.replace("nitter.net", "twitter.com").replace("old.reddit.com/gallery", "reddit.com/gallery").replace("https://youtu.be/", "https://youtube.com/watch?v=").replace("https://music.youtube.com/watch?v=", "https://youtube.com/watch?v=").replace("https://streamable.com/", "https://streamable.com/e/").replace("https://youtube.com/shorts/", "https://youtube.com/watch?v=").replace("https://mobile.twitter", "https://twitter").replace("https://m.facebook", "https://facebook").replace("m.wikipedia.org", "wikipedia.org").replace("https://m.youtube", "https://youtube").replace("https://www.youtube", "https://youtube").replace("https://www.twitter", "https://twitter").replace("https://www.instagram", "https://instagram").replace("https://www.tiktok", "https://tiktok")


	if "https://youtube.com/watch?v=" in sanitized: sanitized = sanitized.replace("?t=", "&t=")

	captured = []
	for i in youtube_regex.finditer(sanitized):
		if i.group(0) in captured: continue
		captured.append(i.group(0))

		params = parse_qs(urlparse(i.group(2).replace('&amp;','&')).query)
		t = params.get('t', params.get('start', [0]))[0]
		if isinstance(t, str): t = t.replace('s','')

		htmlsource = f'{i.group(1)}<lite-youtube videoid="{i.group(3)}" params="autoplay=1&modestbranding=1'
		if t: htmlsource += f'&start={t}'
		htmlsource += '"></lite-youtube>'

		sanitized = sanitized.replace(i.group(0), htmlsource)

	sanitized = video_sub_regex.sub(r'\1<video controls preload="none"><source src="\2"></video>', sanitized)

	if comment:
		for marsey in g.db.query(Marsey).filter(Marsey.name.in_(marseys_used)).all():
			marsey.count += 1
			g.db.add(marsey)

	if '#fortune' in sanitized:
		sanitized = sanitized.replace('#fortune', '')
		sanitized += '\n\n<p>' + choice(FORTUNE_REPLIES) + '</p>'

	sanitized = sanitized.replace('&amp;','&')
	sanitized = utm_regex.sub('', sanitized)
	sanitized = utm_regex2.sub('', sanitized)


	sanitized = sanitized.replace('<html><body>','').replace('</body></html>','')



	sanitized = bleach.Cleaner(tags=allowed_tags,
								attributes=allowed_attributes,
								protocols=['http', 'https'],
								styles=['color', 'background-color', 'font-weight', 'text-align'],
								filters=[partial(LinkifyFilter, skip_tags=["pre"], parse_email=False, callbacks=[callback], url_re=url_re)]
								).clean(sanitized)



	soup = BeautifulSoup(sanitized, 'lxml')

	links = soup.find_all("a")

	domain_list = set()

	for link in links:

		href = link.get("href")
		if not href: continue
		
		url = urlparse(href)
		domain = url.netloc
		url_path = url.path
		domain_list.add(domain+url_path)

		parts = domain.split(".")
		for i in range(len(parts)):
			new_domain = parts[i]
			for j in range(i + 1, len(parts)):
				new_domain += "." + parts[j]
				domain_list.add(new_domain)

	bans = g.db.query(BannedDomain.domain).filter(BannedDomain.domain.in_(list(domain_list))).all()

	if bans: abort(403, description=f"Remove the banned domains {bans} and try again!")


	signal.alarm(0)

	return sanitized





def allowed_attributes_emojis(tag, name, value):

	if tag == 'img':
		if name == 'loading' and value == 'lazy': return True
		if name == 'data-bs-toggle' and value == 'tooltip': return True
		if name in ['src','alt','title','g']: return True
	return False


def filter_emojis_only(title, edit=False, graceful=False):

	signal.signal(signal.SIGALRM, handler)
	signal.alarm(1)
	
	title = title.replace('‎','').replace('​','').replace("\ufeff", "").replace("𒐪","").replace("\n", "").replace("\r", "").replace("\t", "").replace("&", "&amp;").replace('<','&lt;').replace('>','&gt;').replace('"', '&quot;').replace("'", "&#039;").strip()

	title = render_emoji(title, emoji_regex4, edit)

	title = strikethrough_regex.sub(r'<del>\1</del>', title)

	sanitized = bleach.clean(title, tags=['img','del'], attributes=allowed_attributes_emojis, protocols=['http','https'])

	signal.alarm(0)

	if len(title) > 1500 and not graceful: abort(400)
	else: return title