#!/usr/bin/env python3
"""
Quest and quest accessory views.
"""
from datetime import timedelta, datetime, timezone

import bleach
from django.views.decorators.http import require_POST
from django.contrib import messages
from django.http import HttpResponse
from django.shortcuts import render, redirect

from .models import Quest, DiceRoll, PollOption, PollVote, Page, Post
from .forms import EditQuestForm, QuestForm, PostForm

def index(request):
	"""
	/quest page index. Possibly not needed.
	"""
	return HttpResponse("Hello, world. You're at the quest index.")


def quest(request, quest_id, page_num='0'):
	"""
	Arbituary quest page view.
	"""
	# TODO: 404 quest not found
	quest = Quest.objects.get(id=quest_id)
	pages = Page.objects.filter(
		quest=quest, appendix=False).order_by('page_num')
	appendices = Page.objects.filter(
		quest=quest, appendix=True).order_by('title')
	chat_messages = quest.message_set.all()
	try:
		page = Page.objects.get(quest=quest, page_num=page_num)
	except Page.DoesNotExist:
		messages.error(request, "Page not found, redirecting you.")
		return redirect('quest:quest', quest_id=quest.id, page_num='0')
	posts = quest.post_set.filter(page=page)
	# TODO: filter by page_num as well
	dice_rolls = DiceRoll.objects.filter(dicecall__post__quest=quest)
	poll_options = PollOption.objects.filter(poll__post__quest=quest)
	poll_votes = PollVote.objects.filter(option__poll__post__quest=quest)
	ip_address = request.META['REMOTE_ADDR']
	context = locals()
	if page_num == '0':
		return render(request, 'quest/quest_homepage.html', context)
	else:
		return render(request, 'quest/quest.html', context)


def edit_quest(request, quest_id, page_num=1):
	"""
	Edit quest page. Only available to the QM.
	"""
	quest = Quest.objects.get(id=quest_id)
	if quest.owner != request.user:
		return redirect('quest:quest', quest_id=quest_id, page_num=page_num)
	if request.method == 'POST':
		form = EditQuestForm(request.POST)
		if form.is_valid():
			quest.anon_name = form.cleaned_data['anon_name']
			quest.live = form.cleaned_data['live']

			live_date = form.cleaned_data['live_date']
			live_time = form.cleaned_data['live_time']
			if live_date and live_time:
				live_datetime = datetime.combine(
					live_date,
					live_time,
					timezone.utc
				)
				tz_delta = timedelta(minutes=form.cleaned_data['timezone'])
				live_datetime = live_datetime + tz_delta
				quest.live_time = live_datetime
			else:
				quest.live_time = None
			quest.save()
			return redirect('quest:quest',quest_id=quest.id, page_num=page_num)
		else:
			messages.error(request, "Error")
	else:
		pass
	context = locals()
	return render(request, 'quest/edit_quest.html', context)


def new_quest(request):
	"""
	The page for creating new quests.
	"""
	if not request.user.is_authenticated:
		return redirect('login:index')
	if request.method == 'POST':
		# TODO: clean the post body
		quest = Quest(owner=request.user)
		quest_form = QuestForm(request.POST, instance=quest)
		post = Post(post_type='text')
		post_form = PostForm(request.POST, instance=post)
		if all((quest_form.is_valid(), post_form.is_valid())):
			quest.live = False
			quest.save()
			page0 = Page(
				quest=quest,
				page_num=0,
				title="Homepage",
				appendix=False,
			)
			page0.save()
			page1 = Page(
				quest=quest,
				page_num=1,
				title="Page 1",
				appendix=False,
			)
			page1.save()
			post.quest = quest
			post.page = page1
			post.save()
			return redirect('quest:quest', quest_id=quest.id)
	else:
		quest_form = QuestForm()
		post_form = PostForm()
	context = {'quest_form': quest_form, 'post_form': post_form}
	return render(request, 'quest/new_quest.html', context)


@require_POST
def new_tag(request, quest_id):
	"""Endpoint for adding new tags to a quest."""
	if not request.user.is_authenticated:
		return redirect('login:index')
	tag = request.POST.get('tag', '').strip()
	if not tag:
		return redirect('quest:quest', quest_id=quest_id, page_num='0')

	quest = Quest.objects.get(id=quest_id)
	tag = bleach.clean(tag)
	if tag in quest.tags.names():
		return redirect('quest:quest', quest_id=quest_id, page_num='0')

	quest.tags.add(tag)
	return redirect('quest:quest', quest_id=quest_id, page_num='0')