import uuid
from django.db import models

class NotificationType(models.TextChoices):
    SYSTEM = 'SYSTEM', '系统通知'
    CERTIFICATION = 'CERTIFICATION', '认证通知'
    TASK = 'TASK', '任务通知'
    RESERVATION = 'RESERVATION', '预约通知'

class SmsScene(models.TextChoices):
    REGISTER = 'REGISTER', '注册'
    LOGIN = 'LOGIN', '登录'
    RESET_PASSWORD = 'RESET_PASSWORD', '重置密码'

class AudienceChoices(models.TextChoices):
    ALL = 'ALL', '全平台'
    USER = 'USER', '用户端'
    ENTERPRISE = 'ENTERPRISE', '企业端'

class Announcement(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    title = models.CharField(max_length=256)
    content = models.TextField()
    cover_url = models.CharField(max_length=512, null=True, blank=True)
    publisher = models.ForeignKey('users.User', on_delete=models.CASCADE, related_name='published_announcements')
    target_audience = models.CharField(max_length=16, choices=AudienceChoices.choices, default=AudienceChoices.ALL, help_text='公告受众')
    is_published = models.BooleanField(default=False)
    published_at = models.DateTimeField(null=True, blank=True)
    is_deleted = models.BooleanField(default=False)
    is_recommended = models.BooleanField(default=False, help_text='推荐/置顶')
    recommend_priority = models.IntegerField(default=0, help_text='推荐优先级, 越大越靠前')
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = 'announcements'
        ordering = ['-is_recommended', '-recommend_priority', '-created_at']

class ModelToken(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    user = models.ForeignKey('users.User', on_delete=models.CASCADE, related_name='model_tokens')
    model_id = models.CharField(max_length=128)
    model_name = models.CharField(max_length=256, null=True, blank=True)
    token_value = models.TextField()
    expires_at = models.DateTimeField(null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = 'model_tokens'

class SmsVerification(models.Model):
    phone = models.CharField(max_length=20)
    scene = models.CharField(max_length=32, choices=SmsScene.choices)
    code = models.CharField(max_length=8)
    is_used = models.BooleanField(default=False)
    expired_at = models.DateTimeField()
    used_at = models.DateTimeField(null=True, blank=True)
    ip = models.GenericIPAddressField(null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = 'sms_verifications'

class AuditLog(models.Model):
    user = models.ForeignKey('users.User', on_delete=models.SET_NULL, null=True, blank=True, related_name='audit_logs')
    action = models.CharField(max_length=128)
    resource = models.CharField(max_length=128, null=True, blank=True)
    resource_id = models.CharField(max_length=128, null=True, blank=True)
    detail = models.JSONField(default=dict)
    ip = models.GenericIPAddressField(null=True, blank=True)
    user_agent = models.TextField(null=True, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = 'audit_logs'

class Notification(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    user = models.ForeignKey('users.User', on_delete=models.CASCADE, related_name='notifications')
    type = models.CharField(max_length=32, choices=NotificationType.choices)
    title = models.CharField(max_length=256)
    content = models.TextField()
    related_id = models.CharField(max_length=128, null=True, blank=True)
    is_read = models.BooleanField(default=False)
    is_deleted = models.BooleanField(default=False)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = 'notifications'

class SystemConfig(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    config_key = models.CharField(max_length=128, unique=True)
    config_value = models.JSONField()
    description = models.TextField(null=True, blank=True)
    updated_by = models.ForeignKey('users.User', on_delete=models.SET_NULL, null=True, blank=True, related_name='updated_configs')
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = 'system_configs'

class AiModel(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(max_length=128)
    provider = models.CharField(max_length=128)
    description = models.TextField(null=True, blank=True)
    icon = models.CharField(max_length=64, null=True, blank=True)
    price_per_token = models.DecimalField(max_digits=10, decimal_places=6, default=0)
    is_active = models.BooleanField(default=True)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        db_table = 'ai_models'


class Skill(models.Model):
    """Admin-managed skill/expertise domain tags used across the platform."""
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(max_length=64, unique=True)
    category = models.CharField(max_length=64, null=True, blank=True, help_text='分类: 技术/设计/内容/数据 等')
    sort_order = models.IntegerField(default=0, help_text='排序权重, 越小越靠前')
    is_active = models.BooleanField(default=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = 'skills'
        ordering = ['sort_order', 'name']

    def __str__(self):
        return self.name