"""系统监控只读接口；全部复用管理员依赖，不提供运维写操作。"""

from typing import Annotated

from fastapi import APIRouter, Path, Query, Request
from fastapi.encoders import jsonable_encoder
from fastapi.responses import JSONResponse

from app.api.deps import AdminUser, DbSession
from app.core.response import ApiResponse, PageResult, ok
from app.schemas.monitor import EventOut, EventQuery, MonitorWindow, OverviewOut
from app.services import monitor_service

router = APIRouter(prefix="/monitor", tags=["系统管理 · 系统监控"])


@router.get("/overview", response_model=ApiResponse[OverviewOut], summary="健康总览")
def overview(request: Request, session: DbSession, _: AdminUser):
    return ok(monitor_service.overview(session, request.app.state.monitor))


@router.get("/trends", response_model=ApiResponse[dict], summary="分钟级监控趋势")
def trends(
    request: Request, session: DbSession, _: AdminUser, query: Annotated[MonitorWindow, Query()]
):
    return ok(monitor_service.trends(session, request.app.state.monitor, query))


@router.get("/interfaces", response_model=ApiResponse[dict], summary="接口性能排行")
def interfaces(
    request: Request, session: DbSession, _: AdminUser, query: Annotated[MonitorWindow, Query()]
):
    return ok(monitor_service.interfaces(session, request.app.state.monitor, query))


@router.get("/events", response_model=ApiResponse[PageResult[EventOut]], summary="诊断事件")
def events(session: DbSession, _: AdminUser, query: Annotated[EventQuery, Query()]):
    return ok(monitor_service.events(session, query))


@router.get("/events/{event_id}", response_model=ApiResponse[EventOut], summary="诊断事件详情")
def event(session: DbSession, _: AdminUser, event_id: Annotated[int, Path(ge=1)]):
    return ok(monitor_service.event(session, event_id))


@router.get("/diagnostic", summary="下载脱敏诊断摘要")
def diagnostic(
    request: Request, session: DbSession, _: AdminUser, query: Annotated[EventQuery, Query()]
):
    return JSONResponse(
        jsonable_encoder(monitor_service.diagnostic(session, request.app.state.monitor, query)),
        headers={
            "Content-Disposition": 'attachment; filename="monitor-diagnostic.json"',
            "Cache-Control": "no-store",
        },
    )