from django.db import models
from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, \
                                       PermissionsMixin
from django.conf import settings
# Create your models here.
class UserManager(BaseUserManager):

    def create_user(self, email, password=None, **extra_fields):
        """Create and saves a new user"""
        if not email:
            raise ValueError('Users must have email address')

        user = self.model(email = self.normalize_email(email), **extra_fields)
        user.set_password(password)
        user.save(using=self._db)

        return user

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

        return user

class User(AbstractBaseUser, PermissionsMixin):
    """Custom user model that supports using email instead of username"""
    email = models.EmailField(max_length=225, unique=True)
    name = models.CharField(max_length=225)
    is_active = models.BooleanField(default=True)
    is_staff = models.BooleanField(default=False)

    objects = UserManager()

    USERNAME_FIELD ='email'

class Tag(models.Model):
    name = models.CharField(max_length=225)
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
    )

    def __str__(self):
        return self.name

class Ingredient(models.Model):
    name = models.CharField(max_length=225)
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE
    )
    def __str__(self):
        return self.name

class Recipe(models.Model):
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE
    )
    title = models.CharField(max_length=255)
    time_minutes = models.IntegerField()
    price = models.DecimalField(max_digits=5, decimal_places=2)
    link = models.CharField(max_length=255, blank=True)
    ingredients = models.ManyToManyField('Ingredient')
    tags = models.ManyToManyField('Tag')

    def __str__(self):
        return self.title




