#!/usr/bin/env python3
"""
The main quest models.
"""
from django.db import models
from django.conf import settings
from django.core.validators import MaxValueValidator, MinValueValidator
from taggit.managers import TaggableManager

class Quest(models.Model):
	"""
	The meta quest object. Contains general information about the quest.
	"""
	title = models.CharField(max_length=100)
	owner = models.ForeignKey(
		settings.AUTH_USER_MODEL,
		on_delete=models.CASCADE)
	anon_name = models.CharField(max_length=20, default="Anonymous")
	live = models.BooleanField(default=False)
	live_time = models.DateTimeField(blank=True, null=True)
	tags = TaggableManager()
	anonymize = models.BooleanField(default=True)
	description = models.CharField(max_length=256, blank=True, null=True)
	latest_post_date = models.DateTimeField(null=True, blank=True)

	def update_post_date(self):
		try:
			latest_post = self.post_set.order_by('-timestamp')[0]
			self.latest_post_date = latest_post.timestamp
			self.save()
		except:
			pass # no posts yet


class Message(models.Model):
	"""
	Represents a chat message.
	"""
	quest = models.ForeignKey(Quest, on_delete=models.CASCADE)
	user = models.ForeignKey(
		settings.AUTH_USER_MODEL,
		on_delete=models.CASCADE,
		blank=True,
		null=True)
	timestamp = models.DateTimeField(auto_now=True)
	message = models.TextField(max_length=512)


class Page(models.Model):
	"""
	Represents the title of a quest page.
	"""
	quest = models.ForeignKey(Quest, on_delete=models.CASCADE)
	page_num = models.CharField(max_length=4)
	title = models.CharField(max_length=200)
	appendix = models.BooleanField()

	def __str__(self):
		return self.title


class Post(models.Model):
	"""
	An object for arbituary posts. Contains all post data, type, etc.
	"""
	quest = models.ForeignKey(Quest, on_delete=models.CASCADE)
	page = models.ForeignKey(Page, on_delete=models.CASCADE)
	POST_TYPES = (
		('text', 'Text'),
		('dice', 'Dice'),
		('poll', 'Poll')
	)
	post_type = models.CharField(max_length=4, choices=POST_TYPES)
	post_text = models.TextField()
	timestamp = models.DateTimeField(auto_now=True)

	def save(self, **kwargs):
		super(Post, self).save(**kwargs)
		self.quest.update_post_date()

	def delete(self):
		super(Post, self).delete()
		self.quest.update_post_date()


class DiceCall(models.Model):
	"""
	An object representing dice calls made by the QM.
	"""
	post = models.OneToOneField(
		Post,
		on_delete=models.CASCADE,
		primary_key=True,
	)
	dice_roll = models.CharField(max_length=16)
	strict = models.BooleanField()
	dice_challenge = models.IntegerField(
		null=True,
		blank=True,
		validators=[
			MinValueValidator(1),
			MaxValueValidator(65536),
		]
	)
	rolls_taken = models.IntegerField(
		null=True,
		blank=True,
		validators=[
			MinValueValidator(1),
			MaxValueValidator(256),
		]
	)
	open = models.BooleanField()


class DiceRoll(models.Model):
	"""
	Represents a dice roll made on a valid dicecall.
	"""
	dicecall = models.ForeignKey(DiceCall, on_delete=models.CASCADE)
	message = models.OneToOneField(
		Message,
		on_delete=models.CASCADE,
		primary_key=True,
	)
	roll = models.CharField(max_length=16)
	results = models.TextField()
	total = models.IntegerField()


class Poll(models.Model):
	"""
	An object representing polls made by the QM.
	"""
	post = models.OneToOneField(
		Post,
		on_delete=models.CASCADE,
		primary_key=True,
	)
	multi_choice = models.BooleanField()
	allow_writein = models.BooleanField()
	open = models.BooleanField()


class PollOption(models.Model):
	"""
	Represents options (choices) attached to a given poll. These can be
	added by the QM upon creation, or by users through write-ins.
	"""
	poll = models.ForeignKey(Poll, on_delete=models.CASCADE)
	text = models.CharField(max_length=200)


class PollVote(models.Model):
	"""
	Represents a user voting for an option.
	"""
	option = models.ForeignKey(PollOption, on_delete=models.CASCADE)
	user = models.ForeignKey(
		settings.AUTH_USER_MODEL,
		on_delete=models.CASCADE,
		blank=True,
		null=True)
	ip_address = models.GenericIPAddressField()

	class Meta:
		unique_together = ('option', 'ip_address')