from django.db import models
from django.contrib.auth.models import User

from django.db.models.signals import post_save
"""For now, all the models are just shoved into one file.
Will seperate eventually."""

max_name_length = 25
max_location_length = 20
max_title_length = 30
max_post_length = 65000

class Player(models.Model):
    #name ia covered by the django.auth User object
    user = models.OneToOneField(User)
    friends = models.ManyToManyField("self", symmetrical=True)
    post_count = models.PositiveIntegerField(default=0)
    #Date joined also covered by user
    #date_joined = models.DateField()
    location = models.CharField(max_length=max_location_length)
    #Again, subsumed by user
    #groups = models.ManyToManyField("Group", related_name="groups", db_table=u"PLAYERS_TO_GROUPS")
    #size?
    #size = models.BigIntegerField()
    #Implemented by django.auth User
    #permissions = models.ForeignKey("Permission_Group")

def create_user_profile(sender, instance, created, **kwargs):
    if created:
        Player.objects.create(user=instance)

post_save.connect(create_user_profile, sender=User)

class ManyToManyField_NoSyncdb(models.ManyToManyField):
    def __init__(self, *args, **kwargs):
        super(ManyToManyField_NoSyncdb, self).__init__(*args, **kwargs)
        self.creates_table = False
        
class Group(models.Model):
    name = models.CharField(max_length=max_name_length)
    admins = models.ManyToManyField(Player, symmetrical=True)
    members = ManyToManyField_NoSyncdb(Player, related_name="members", db_table="PLAYERS_TO_GROUPS")
    description = models.TextField(max_length=max_post_length)

class Section(models.Model):
    title = models.CharField(max_length=max_title_length)

#Could have used inheritance.
#Decided not to so all data is in one table. (Only one field is
#shared anyway) Removed here because lots of forum data is expected
class Subsection(models.Model):
    title = models.CharField(max_length=max_title_length)
    parent = models.ForeignKey(Section, related_name="children")

class Thread(models.Model):
    description = models.CharField(max_length=max_title_length)
    author = models.ForeignKey(Player, related_name="threads")
    post_date = models.DateField()
    parent = models.ForeignKey(Subsection, related_name="threads")
    closed = models.BooleanField()

#Message-based classes
    
class Message(models.Model):
    title = models.CharField(max_length=max_title_length)
    author = models.ForeignKey(Player, related_name="messages")
    post_date = models.DateField()
    text = models.TextField(max_length=max_post_length)

class Post(Message):
    flagged = models.BooleanField()

class Pm(Message):
    read = models.BooleanField()
    starred = models.BooleanField()

#Douibly implemented to avoid generic relation ugliness
class Friend_Request(models.Model):
    author = models.ForeignKey(Player, related_name="sent_friend_requests")  
    recipient = models.ForeignKey(Player, related_name="friend_requests")
    #None represents not-yet-answered
    #False transforms this into a block
    accepted = models.NullBooleanField()

#Douibly implemented to avoid generic relation ugliness
class Join_Group_Request(models.Model):
    author = models.ForeignKey(Player, related_name="sent_group_requests")  
    recipient = models.ForeignKey(Group, related_name="membership_requests")
    #None represents not-yet-answered
    #False transforms this into a block
    accepted = models.NullBooleanField()