#!/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.shortcuts import render, redirect
from django.db.models import F

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

def index(request):
	"""The quest page index."""
	search_terms = request.GET.get('search_terms')
	search_type = request.GET.get('search_type')
	tags = request.GET.get('tags')
	order_by = request.GET.get('order_by')
	order_way = request.GET.get('order_way', 'desc')

	order_keys = {
		'ceation_date': 'id',
		'last_post': 'latest_post_date',
		'next_live': 'live_time',
	}
	order_by = order_keys.get(order_by, 'id')

	results = Quest.objects.all()
	if search_terms:
		if search_type == 'title':
			results = results.filter(title__unaccent__icontains=search_terms)
		elif search_type == 'author':
			results = results.filter(
				owner__username__unaccent__icontains=search_terms)
	if tags:
		results = results.filter(tags__name__in=tags.split()).distinct()

	if order_way == 'asc':
		results = results.order_by(F(order_by).asc(nulls_last=True))
	elif order_way == 'desc':
		results = results.order_by(F(order_by).desc(nulls_last=True))

	context = locals()
	return render(request, 'quest/index.html', context)


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='0'):
	"""
	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_form = QuestForm(request.POST)
		if quest_form.is_valid():
			quest = quest_form.save(commit=False)
			quest.owner = request.user
			quest.save()
			quest_form.save_m2m()
			print(quest.tags.names())
			page = Page(
				quest=quest,
				page_num=0,
				title="Homepage",
				appendix=False,
			)
			page.save()
			return redirect('quest:quest', quest_id=quest.id)
	else:
		quest_form = QuestForm()
	context = locals()
	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')