from datetime import datetime
from typing import Optional
from pydantic import BaseModel


class DeviceStatusSummary(BaseModel):
    total: int
    online: int
    offline: int
    checking: int
    unknown: int
    online_rate: float


class DeviceStatsItem(BaseModel):
    device_id: int
    device_name: str
    device_ip: str
    device_type: str
    location: str
    project_name: str
    total_pings: int
    alive_pings: int
    packet_loss_rate: float
    avg_response_time: Optional[float] = None
    offline_count: int
    total_offline_duration: int  # 分钟
    max_offline_duration: int


class TimeSeriesPoint(BaseModel):
    time: datetime
    value: float


class DashboardStats(BaseModel):
    summary: DeviceStatusSummary
    recent_offline: list  # list[AlertEventOut]
    offline_trend: list[TimeSeriesPoint]
    packet_loss_top: list[DeviceStatsItem]