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

class User(AbstractUser):
    avatar = models.ImageField(upload_to='avatars/', null=True, blank=True)
    email = models.EmailField(unique=True)
    phone = models.CharField(max_length=20, unique=True)
    address = models.CharField(max_length=255, null=True, blank=True)
    name = models.CharField(max_length=255, null=True, blank=True)
    roles = models.JSONField(default=list)

    def save(self, *args, **kwargs):
        if not self.roles:
            self.roles = ['user']
        if (self.is_staff or self.is_superuser) and 'admin' not in self.roles:
            self.roles.append('admin')
        super().save(*args, **kwargs)

class Book(models.Model):
    title = models.CharField(max_length=255)
    author = models.CharField(max_length=255)
    publisher = models.CharField(max_length=255)
    price = models.IntegerField()
    stock = models.IntegerField()
    isbn = models.CharField(max_length=20, unique=True)
    cover = models.CharField(max_length=2048, null=True, blank=True)
    description = models.TextField(null=True, blank=True)


class Order(models.Model):
    STATUS_CHOICES = [
        (1, 'Pending'),
        (2, 'Shipped'),
        (3, 'Rejected'),
    ]
    buyer = models.ForeignKey(User, on_delete=models.CASCADE)
    address = models.CharField(max_length=255)
    createdAt = models.DateTimeField(auto_now_add=True)
    status = models.SmallIntegerField(choices=STATUS_CHOICES, default=1)

    @property
    def total_price(self):
        return sum(item.total_price for item in self.items.all())

class OrderItem(models.Model):
    order = models.ForeignKey(Order, on_delete=models.CASCADE, related_name='items')
    book = models.ForeignKey(Book, on_delete=models.CASCADE)
    amount = models.IntegerField()
    bookPrice = models.IntegerField()

    @property
    def total_price(self):
        return self.bookPrice * self.amount

class Comment(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    book = models.ForeignKey(Book, on_delete=models.CASCADE)
    content = models.TextField()
    createdAt = models.DateTimeField(auto_now_add=True)