from django.db import models
import uuid


class Instance(models.Model):
    """
    OpenClaw 实例注册
    
    每台运行 OpenClaw 的机器注册一个实例，关联多个 Agent
    """
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    instance_id = models.CharField(max_length=100, unique=True, verbose_name='实例 ID')
    instance_name = models.CharField(max_length=200, verbose_name='实例名称')
    
    # Agent 列表（JSON 存储）
    agent_ids = models.JSONField(default=list, verbose_name='Agent ID 列表')
    
    # Webhook 配置
    webhook_url = models.URLField(verbose_name='Webhook URL', help_text='消息推送地址')
    webhook_enabled = models.BooleanField(default=True, verbose_name='启用 Webhook')
    
    # 状态
    is_active = models.BooleanField(default=True, verbose_name='是否活跃')
    last_heartbeat = models.DateTimeField(null=True, blank=True, verbose_name='最后心跳')
    
    # 元数据
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    
    class Meta:
        db_table = 'instances'
        verbose_name = 'OpenClaw 实例'
        verbose_name_plural = 'OpenClaw 实例'
        ordering = ['-created_at']
    
    def __str__(self):
        return f"{self.instance_name} ({self.instance_id})"
    
    def has_agent(self, agent_id: str) -> bool:
        """检查是否包含某个 Agent"""
        return agent_id in self.agent_ids


class MeetingInstanceMap(models.Model):
    """
    会议 - 实例映射
    
    记录哪些实例参与了哪些会议
    """
    meeting_id = models.UUIDField(verbose_name='会议 ID')
    instance = models.ForeignKey(Instance, on_delete=models.CASCADE, related_name='meetings')
    agent_ids = models.JSONField(default=list, verbose_name='参与的 Agent ID 列表')
    
    joined_at = models.DateTimeField(auto_now_add=True)
    left_at = models.DateTimeField(null=True, blank=True)
    
    class Meta:
        db_table = 'meeting_instance_maps'
        unique_together = ['meeting_id', 'instance']
        indexes = [
            models.Index(fields=['meeting_id', 'left_at']),
        ]
    
    def __str__(self):
        return f"Meeting {self.meeting_id} - {self.instance.instance_name}"