#!/usr/bin/env python3
"""
Individual functions for handling WebSocket events. Gets called by the
QuestConsumer object in consumers.py.
"""
# TODO: quest owner only events
# TODO: try/except on database calls
import re
import time
import types
import random

import bleach
from django.db import IntegrityError
from django.utils.timezone import localtime
from django.urls import reverse

from quest.models import *
from quest.tools import handle_img
from quest.forms import DiceCallForm, PollForm

def message(socket, data):
	"""
	Gets called when the server receives a 'message' event.
	"""
	# TODO: validation
	message = data.get('message')

	# cleaning
	message = message[:512]
	message = message.strip()
	if not message:
		return
	tags = ["b", "code", "i", "s"]
	message = bleach.clean(message, tags=tags)

	# greentext
	lines = []
	for line in message.splitlines():
		if line.startswith(">") and not line.startswith(">>"):
			line = '<span class="greenText">' + line + '</span>'
		lines.append(line)
	message = "<br>".join(lines)

	# quote links
	quotes = re.findall(r"&gt;&gt;\d+", message)
	for quote in quotes:
		msg_id = quote.replace("&gt;&gt;", "")
		msg = '<a class="quotelink" '
		msg += 'href="javascript:scroll_to_msg(\'' + msg_id + '\')" '
		msg += 'onmousemove="show_preview(event, \'' + msg_id + '\')" '
		msg += 'onmouseout="clear_preview()">' + quote + '</a>'
		message = message.replace(quote, msg)

	# handle image
	message = handle_img(message)

	# dice rolling
	if any(map(message.startswith, ["/dice", "/roll"])):
		reg = re.search(r"(\d+)d(\d+)([+-]\d+)?", data["message"])
		if not reg:
			return
		try:
			groups = [0 if d is None else int(d) for d in reg.groups()]
			dice_num, dice_sides, dice_mod = groups
			assert 1 <= dice_num <= 256
			assert 1 <= dice_sides <= 256
			assert -65536 <= dice_mod <= 65536
		except (ValueError, AssertionError):
			return
		dice_results = [random.randint(1, dice_sides) for _ in range(dice_num)]
		total = sum(dice_results) + dice_mod
		roll_msg = f"Rolled {', '.join(map(str, dice_results))}"
		if dice_mod:
			if dice_mod > 0:
				roll_msg += " + " + str(dice_mod)
			else:
				roll_msg += " - " + str(dice_mod)[1:]
		roll_msg += " = " + str(total)
		message += '<hr class="msgSrvHr"><b>' + roll_msg + "</b>"


	user = socket.scope['user']

	m = Message(
		quest=Quest.objects.get(id=socket.quest_id),
		message=message)
	if user.username:
		m.user = user
	m.save()

	data = {}
	data['message_id'] = m.id
	data['message'] = message
	data['date'] = int(time.time())
	data['name'] = user.username
	socket.send('message', data)

	# append rolls to dicecall
	if any(map(message.startswith, ["/dice", "/roll"])):
		try:
			dc = DiceCall.objects.get(
				post__quest__id=socket.quest_id,
				open=True
			)
		except DiceCall.DoesNotExist:
			return
		dice_roll = f"{dice_num}d{dice_sides}"
		if dice_mod:
			if dice_mod > 0:
				dice_roll += "+"
			dice_roll += str(dice_mod)

		if dc.strict and dc.dice_roll != dice_roll:
			return

		dr = DiceRoll(
			dicecall=dc,
			message=m,
			roll=dice_roll,
			results=re.search(r"Rolled (.+) =", roll_msg).group(1),
			total=total,
		)
		dr.save()

		if DiceRoll.objects.filter(dicecall=dc).count() == dc.rolls_taken:
			dc.open = False
			dc.save()
			socket.send('close_post', {'post_id': dc.post_id})

		data = {}
		data['post_text'] = roll_msg + " (" + dice_roll + ")"
		if dc.dice_challenge:
			if total >= dc.dice_challenge:
				data["post_text"] += " - Pass"
			else:
				data["post_text"] += " - Fail"
		data['post_type'] = 'dice'
		data['post_id'] = dc.post_id
		socket.send('update_post', data)


def text_post(socket, data):
	"""
	Called when the QM creates a new text post.
	"""
	# TODO: security
	post_text = data.get('text')
	page_num = data.get('page_num')

	# cleaning
	post_text = bleach.clean(post_text.strip())
	post_text = post_text.replace("\n", "<br>")

	# handle image

	p = Post(
		quest=Quest.objects.get(id=socket.quest_id),
		page_num=page_num,
		post_type='text',
		post_text=post_text)
	p.save()

	data = {}
	data['post_text'] = post_text
	data['post_type'] = 'text'
	data['date'] = localtime(p.timestamp).strftime('%Y-%m-%d %H:%M')
	data['post_id'] = p.id
	socket.send('new_post', data)


def dice_post(socket, data):
	"""
	Called when the QM makes a new dice post.
	"""
	page_num = data.get('page_num')
	form = DiceCallForm(data)
	if not form.is_valid():
		return # error message?
	form = form.cleaned_data

	posts = Post.objects.filter(
		quest__id=socket.quest_id, post_type='dice', dicecall__open=True)
	for post in posts:
		post.dicecall.open = False
		post.dicecall.save()
	socket.send('close_all_posts')

	dice_roll = str(form['diceNum']) + "d"
	dice_roll += str(form['diceSides'])
	if form['diceMod']:
		if form['diceMod'] > 0:
			dice_roll += "+"
		dice_roll += str(form['diceMod'])

	post_text = "Roll " + dice_roll
	if form['diceChal']:
		post_text += " vs DC" + str(form['diceChal'])
	
	p = Post(
		quest=Quest.objects.get(id=socket.quest_id),
		page_num=page_num,
		post_type='dice',
		post_text=post_text
	)
	p.save()
	dc = DiceCall(
		post=p,
		dice_roll=dice_roll,
		strict=form['diceStrict'],
		dice_challenge=form['diceChal'],
		rolls_taken=form['diceRollsTaken'],
		open=True,
	)
	dc.save()

	data = {}
	data['post_id'] = p.id
	data['post_type'] = 'dice'
	data['post_text'] = post_text
	data['date'] = localtime(p.timestamp).strftime('%Y-%m-%d %H:%M')
	socket.send('new_post', data)


def poll_post(socket, data):
	"""
	Called when the QM makes a new dice post.
	"""
	page_num = data.get('page_num')
	form = PollForm(data)
	if not form.is_valid():
		return # error message?
	form = form.cleaned_data

	p = Post(
		quest=Quest.objects.get(id=socket.quest_id),
		page_num=page_num,
		post_type='poll',
		post_text="Poll"
	)
	p.save()
	pl = Poll(
		post=p,
		multi_choice=form.pop('multi_choice'),
		allow_writein=form.pop('allow_writein'),
		open=True
	)
	pl.save()
	options = []
	for key, option in form.items():
		o = PollOption(
			poll=pl,
			text=option
		)
		o.save()
		options.append(o)
	
	data = {}
	data['post_type'] = 'poll'
	data['post_id'] = p.id
	data['post_text'] = "Poll"
	data['date'] = localtime(p.timestamp).strftime('%Y-%m-%d %H:%M')
	data['options'] = [(o.id, o.text) for o in options]
	socket.send('new_post', data)


def edit_post(socket, data):
	"""
	Called when the QM saves an edited post.
	"""
	post_id = data.get('post_id')
	post_text = data.get('post_text')

	# cleaning
	post_text = bleach.clean(post_text.strip())
	post_text = post_text.replace("\n", "<br>")

	# handle image

	p = Post.objects.get(id=post_id)
	p.post_text = post_text
	p.save()

	data = {}
	data['post_text'] = post_text
	data['post_type'] = 'text'
	data['post_id'] = p.id
	socket.send('update_post', data)


def close_post(socket, data):
	"""
	Called when the QM closes an open post.
	"""
	post_id = data.get('post_id')
	p = Post.objects.get(id=post_id)
	if data.get('post_type') == 'dice':
		p.dicecall.open = False
		p.dicecall.save()
	elif data.get('post_type') == 'poll':
		p.poll.open = False
		p.poll.save()

	data = {}
	data['post_id'] = post_id
	socket.send('close_post', data)


def open_post(socket, data):
	"""
	Called when the QM opens a closed post.
	"""
	# TODO: only posts on last page can be opened
	post_id = data.get('post_id')
	p = Post.objects.get(id=post_id)
	if data.get('post_type') == 'dice':
		posts = Post.objects.filter(
			quest__id=socket.quest_id, post_type='dice', dicecall__open=True)
		for post in posts:
			post.dicecall.open = False
			post.dicecall.save()
		socket.send('close_all_posts', {'post_type': 'dice'})

		p.dicecall.open = True
		p.dicecall.save()
	elif data.get('post_type') == 'poll':
		p.poll.open = True
		p.poll.save()

	data = {}
	data['post_id'] = post_id
	socket.send('open_post', data)


def vote(socket, data):
	"""
	Called when a player votes in a poll.
	"""
	post_id = data.get('post_id')
	option_id = data.get('option_id')
	polarity = data.get('polarity')
	ip_address = socket.scope['client'][0]
	user = socket.scope['user']

	if polarity == False:
		v = PollVote.objects.get(ip_address=ip_address, option__id=option_id)
		v.delete()
	else:
		p = Poll.objects.get(post_id=post_id)
		if p.multi_choice == False:
			votes = PollVote.objects.filter(
				ip_address=ip_address,
				option__poll=p
			)
			for vote in votes:
				vote.delete()

				data = {}
				data['option_id'] = vote.option.id
				data['polarity'] = False
				socket.send('vote', data)
				socket.self_send('set_option_box', data)
		v = PollVote(
			option=PollOption.objects.get(id=option_id),
			ip_address=ip_address
		)
		if user.username:
			v.user = user
		try:
			v.save()
		except IntegrityError: # shouldn't we check this first?
			return

	data = {}
	data['option_id'] = option_id
	data['polarity'] = polarity
	socket.send('vote', data)


def write_in(socket, data):
	"""
	Called when a player creates a new write-in.
	"""
	post_id = data.get('post_id')
	option_text = data.get('option_text', '')
	user = socket.scope['user']

	option_text = option_text.strip()
	if not option_text:
		return
	option_text = "Write in: " +  bleach.clean(option_text)
	if len(option_text) > 200:
		# error message?
		return
	p = Poll.objects.get(post_id=post_id)
	o = PollOption(
		poll=p,
		text=option_text
	)
	o.save()

	data = {}
	data['post_id'] = post_id
	data['post_type'] = 'poll'
	data['option_id'] = o.id
	data['option_text'] = option_text
	socket.send('update_post', data)


def new_page(socket, data):
	"""
	Called when the QM creates a new page.
	"""
	title = data.get('page_title')

	quest = Quest.objects.get(id=socket.quest_id)
	p = PageTitle(
		quest=quest,
		page_num=PageTitle.objects.filter(quest=quest).count() + 1,
		title=title,
	)
	p.save()

	data = {}
	data['page_num'] = p.page_num
	data['title'] = title
	data['url'] = reverse('quest:quest', args=[socket.quest_id, p.page_num])
	socket.send('new_page', data)


events = {}
for obj in dir():
	if type(locals()[obj]) == types.FunctionType:
		events[locals()[obj].__name__] = locals()[obj]