from __future__ import annotations

from fastapi import APIRouter, Depends, Query
from sqlalchemy.ext.asyncio import AsyncSession

from app.api.deps import get_session
from app.core.constants import Role
from app.core.dependencies import get_current_user_id, require_role
from app.schemas.monitoring import AlertRead, AlertRuleCreate, AlertRuleRead, SystemHealthResponse
from app.services.monitoring_service import MonitoringService

router = APIRouter(prefix="/monitoring", tags=["monitoring"])


@router.get("/health", response_model=SystemHealthResponse)
async def system_health(
    _: dict = Depends(require_role(*Role.MANAGEMENT_ROLES)),
    session: AsyncSession = Depends(get_session),
) -> SystemHealthResponse:
    service = MonitoringService(session)
    return await service.get_system_health()


@router.get("/alerts", response_model=list[AlertRead])
async def list_alerts(
    skip: int = Query(0, ge=0),
    limit: int = Query(50, ge=1, le=200),
    _: dict = Depends(require_role(*Role.MANAGEMENT_ROLES)),
    session: AsyncSession = Depends(get_session),
) -> list[AlertRead]:
    service = MonitoringService(session)
    return await service.list_active_alerts(skip=skip, limit=limit)


@router.post("/alerts/{alert_id}/acknowledge", response_model=AlertRead)
async def acknowledge_alert(
    alert_id: int,
    user_id: int = Depends(get_current_user_id),
    session: AsyncSession = Depends(get_session),
) -> AlertRead:
    service = MonitoringService(session)
    return await service.acknowledge_alert(alert_id, user_id)


@router.get("/alert-rules", response_model=list[AlertRuleRead])
async def list_alert_rules(
    _: dict = Depends(require_role(*Role.MANAGEMENT_ROLES)),
    session: AsyncSession = Depends(get_session),
) -> list[AlertRuleRead]:
    service = MonitoringService(session)
    return await service.list_alert_rules()


@router.post("/alert-rules", response_model=AlertRuleRead, status_code=201)
async def create_alert_rule(
    body: AlertRuleCreate,
    user_id: int = Depends(get_current_user_id),
    session: AsyncSession = Depends(get_session),
) -> AlertRuleRead:
    service = MonitoringService(session)
    return await service.create_alert_rule(body, user_id)