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


class User(AbstractUser):
    """用户表 - 扩展 Django 内置用户模型"""
    
    ROLE_CHOICES = [
        ('user', '普通用户'),
        ('moderator', '版主'),
        ('admin', '管理员'),
    ]
    
    email = models.EmailField('邮箱', blank=True)
    phone = models.CharField('手机号', max_length=20, blank=True)
    avatar = models.ImageField('头像', upload_to='avatars/', blank=True, null=True)
    role = models.CharField('角色', max_length=20, choices=ROLE_CHOICES, default='user')
    bio = models.TextField('个人简介', blank=True)
    created_at = models.DateTimeField('创建时间', auto_now_add=True)
    updated_at = models.DateTimeField('更新时间', auto_now=True)
    is_verified = models.BooleanField('是否已验证', default=False)
    
    class Meta:
        verbose_name = '用户'
        verbose_name_plural = '用户'
    
    def __str__(self):
        return self.username
    
    def is_moderator(self):
        """是否是版主"""
        return self.role == 'moderator' or self.moderator_permissions.filter(status='active').exists()
    
    def is_admin(self):
        """是否是管理员"""
        return self.role == 'admin' or self.is_superuser
    
    def get_moderator_regions(self):
        """获取管辖的区域列表"""
        return [perm.region for perm in self.moderator_permissions.filter(status='active')]