"""监控与日志模型（存储于 metrics.db）

- MetricPoint:  资源监控时序数据（Agent 上报）
- ServerInfo:   服务器基础信息快照（Agent 上报）
- SecurityCheck: 安全检查项结果
- EventLog:     系统事件日志
"""

from datetime import datetime
from typing import Optional

from sqlalchemy import Index
from sqlmodel import Field, SQLModel

from app.core.timeutils import utcnow


class MetricPoint(SQLModel, table=True):
    """资源监控时序数据"""

    __tablename__ = "metric_points"
    __table_args__ = (Index("ix_metric_points_asset_ts", "asset_id", "ts"),)

    id: Optional[int] = Field(default=None, primary_key=True)
    asset_id: int = Field(index=True, description="关联资产 ID")
    ts: datetime = Field(default_factory=utcnow, index=True, description="采集时间")
    cpu_pct: Optional[float] = Field(default=None, description="CPU 使用率 %")
    mem_pct: Optional[float] = Field(default=None, description="内存使用率 %")
    disk_pct: Optional[float] = Field(default=None, description="磁盘使用率 %")
    net_in_mb: Optional[float] = Field(default=None, description="网络入流量 MB（采样间隔）")
    net_out_mb: Optional[float] = Field(default=None, description="网络出流量 MB（采样间隔）")
    load_1m: Optional[float] = Field(default=None, description="1 分钟负载")
    uptime_sec: Optional[int] = Field(default=None, description="运行时长（秒）")


class ServerInfo(SQLModel, table=True):
    """服务器基础信息快照（每个资产一条，覆盖更新）"""

    __tablename__ = "server_info"

    id: Optional[int] = Field(default=None, primary_key=True)
    # 逻辑关联 assets.id（跨库不设物理外键）
    asset_id: int = Field(unique=True, index=True)
    hostname: Optional[str] = Field(default=None)
    os: Optional[str] = Field(default=None, description="操作系统发行版")
    kernel: Optional[str] = Field(default=None, description="内核版本")
    cpu_cores: Optional[int] = Field(default=None)
    mem_total_gb: Optional[float] = Field(default=None)
    disk_total_gb: Optional[float] = Field(default=None)
    public_ip: Optional[str] = Field(default=None)
    tailscale_ip: Optional[str] = Field(default=None)
    status: Optional[str] = Field(default="online", description="online/offline")
    last_seen: datetime = Field(default_factory=utcnow, description="最近上报时间")


class SecurityCheck(SQLModel, table=True):
    """安全检查项结果"""

    __tablename__ = "security_checks"
    __table_args__ = (Index("ix_security_checks_asset_ts", "asset_id", "ts"),)

    id: Optional[int] = Field(default=None, primary_key=True)
    asset_id: int = Field(index=True)
    ts: datetime = Field(default_factory=utcnow, index=True)
    check_item: str = Field(description="检查项，如 ssh_config/firewall/updates")
    status: str = Field(default="unknown", description="pass/warn/fail/unknown")
    detail: Optional[str] = Field(default=None, description="检查详情")
    suggestion: Optional[str] = Field(default=None, description="加固建议")


class EventLog(SQLModel, table=True):
    """系统事件日志"""

    __tablename__ = "event_logs"

    id: Optional[int] = Field(default=None, primary_key=True)
    ts: datetime = Field(default_factory=utcnow, index=True)
    level: str = Field(default="info", index=True, description="info/warning/error")
    source: str = Field(default="system", description="来源，如 agent/api/backup")
    asset_id: Optional[int] = Field(default=None, index=True)
    message: str = Field(description="事件内容")