from django.db import models


class Changelog(models.Model):
    """更新日志模型"""

    UPDATE_TYPE_CHOICES = [
        ('new_feature', '新功能'),
        ('improvement', '功能优化'),
        ('bug_fix', '问题修复'),
        ('other', '其他'),
    ]

    version = models.CharField(max_length=20, verbose_name='版本号')
    title = models.CharField(max_length=200, verbose_name='更新标题')
    description = models.TextField(verbose_name='详细描述')
    update_type = models.CharField(
        max_length=20,
        choices=UPDATE_TYPE_CHOICES,
        default='other',
        verbose_name='更新类型'
    )
    published_at = models.DateTimeField(verbose_name='发布时间')
    is_published = models.BooleanField(default=True, verbose_name='是否发布')
    created_at = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
    updated_at = models.DateTimeField(auto_now=True, verbose_name='更新时间')

    class Meta:
        verbose_name = '更新日志'
        verbose_name_plural = '更新日志'
        ordering = ['-published_at']

    def __str__(self):
        return f'{self.version} - {self.title}'