"""
儀表板 API
"""
from typing import Optional, List

from fastapi import APIRouter, Depends, HTTPException, status, Query
from sqlalchemy.orm import Session

from app.api.deps import get_db, get_current_user, get_current_manager
from app.models.employee import Employee
from app.services.dashboard_service import DashboardService
from app.schemas.dashboard import (
    DashboardProgressResponse,
    DashboardDistributionResponse,
    DashboardTrendsResponse,
    DashboardAlertResponse,
)
from app.schemas.common import MessageResponse

router = APIRouter(prefix="/api/dashboard", tags=["儀表板"])


@router.get("/progress", response_model=DashboardProgressResponse)
def get_progress(
    period_id: Optional[int] = Query(None),
    department_id: Optional[int] = Query(None),
    db: Session = Depends(get_db),
    current_user: Employee = Depends(get_current_user),
):
    """
    取得進度統計

    返回指定期間的 KPI 完成進度，包含各狀態的數量統計。
    """
    service = DashboardService(db)
    return service.get_progress(period_id, department_id)


@router.get("/distribution", response_model=DashboardDistributionResponse)
def get_distribution(
    period_id: Optional[int] = Query(None),
    db: Session = Depends(get_db),
    current_user: Employee = Depends(get_current_user),
):
    """
    取得分佈統計

    返回 KPI 的部門分佈、狀態分佈、分數區間分佈。
    """
    service = DashboardService(db)
    return service.get_distribution(period_id)


@router.get("/trends", response_model=DashboardTrendsResponse)
def get_trends(
    limit: int = Query(4, ge=1, le=10),
    db: Session = Depends(get_db),
    current_user: Employee = Depends(get_current_user),
):
    """
    取得趨勢統計

    返回歷史期間的平均分數趨勢。
    """
    service = DashboardService(db)
    return service.get_trends(limit)


@router.get("/alerts", response_model=List[DashboardAlertResponse])
def get_alerts(
    is_resolved: Optional[bool] = Query(False),
    limit: int = Query(50, ge=1, le=200),
    db: Session = Depends(get_db),
    current_user: Employee = Depends(get_current_manager),
):
    """
    取得儀表板警示

    返回系統警示列表（主管以上可查看）。
    """
    service = DashboardService(db)
    return service.get_alerts(is_resolved, limit)


@router.put("/alerts/{alert_id}/resolve", response_model=DashboardAlertResponse)
def resolve_alert(
    alert_id: int,
    db: Session = Depends(get_db),
    current_user: Employee = Depends(get_current_manager),
):
    """
    解決警示

    將指定警示標記為已解決。
    """
    service = DashboardService(db)
    alert = service.resolve_alert(alert_id, current_user.id)

    if not alert:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail={"code": "ALERT001", "message": "警示不存在"},
        )

    return alert