from django.db import models
from django.contrib.auth.models import AbstractBaseUser, BaseUserManager

from datetime import date, datetime, timedelta
from django.conf import settings
from django.db.models.signals import post_save
from django.dispatch import receiver
from rest_framework.authtoken.models import Token 

class MyAccountManager(BaseUserManager):
	def create_user(self, email, username, password=None):
		if not email:
			raise ValueError('Users must have an email address')
		if not username:
			raise ValueError('Users must have a username')

		user = self.model(
			email=self.normalize_email(email),
			username=username,
		)

		user.set_password(password)
		user.save(using=self._db)
		return user

	def create_superuser(self, email, username, password):
		user = self.create_user(
			email=self.normalize_email(email),
			password=password,
			username=username,
		)
		user.is_admin = True
		user.is_staff = True
		user.is_superuser = True
		user.save(using=self._db)
		return user 

class Account(AbstractBaseUser):
	email 					= models.EmailField(verbose_name="email", max_length=60, unique=True,error_messages={
                            'unique': "User with this email already exists.",
                        })
	username 				= models.CharField(max_length=30, unique=False)
	date_joined				= models.DateTimeField(verbose_name='date joined', auto_now_add=True)
	last_login				= models.DateTimeField(verbose_name='last login', auto_now=True)
	last_logout				= models.DateTimeField(verbose_name='last logout',null=True)
	last_home_visit			= models.DateTimeField() 
	is_admin				= models.BooleanField(default=False)
	is_active				= models.BooleanField(default=True)
	is_staff				= models.BooleanField(default=False)
	is_superuser			= models.BooleanField(default=False)
	account_status			= models.CharField(max_length = 100, default = 'normal')
		
	USERNAME_FIELD = 'email'
	REQUIRED_FIELDS = ['username']

	objects = MyAccountManager()

	def __str__(self):
		return self.email 

	# For checking permissions. to keep it simple all admin have ALL permissons
	def has_perm(self, perm, obj=None):
		return self.is_admin

	# Does this user have permission to view this app? (ALWAYS YES FOR SIMPLICITY)
	def has_module_perms(self, app_label):
		return True

	class Meta:
	    db_table = "account"


@receiver(post_save, sender=settings.AUTH_USER_MODEL)
def create_auth_token(sender, instance=None, created=False, **kwargs):
    if created:
        Token.objects.create(user=instance)