"""
管理员数据统计API路由

提供用户统计、业务统计、模型统计和仪表盘等API端点
"""
from typing import Optional
from datetime import date

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

from app.database import get_db
from app.schemas.admin_stats_schema import (
    UserOverviewResponse, UserGrowthItem,
    BusinessOverviewResponse, BusinessTrendItem,
    ModelRankingItem,
    DashboardMetricsResponse
)
from app.services.admin_stats_service import AdminStatsService
from app.dependencies.admin_auth import get_current_admin
from app.models.admin import AdminUser

router = APIRouter(prefix="/api/admin/stats", tags=["数据统计"])


# ==================== 用户统计接口 ====================

@router.get("/users/overview", response_model=UserOverviewResponse)
async def get_user_overview(
    start_date: Optional[date] = Query(None, description="开始日期"),
    end_date: Optional[date] = Query(None, description="结束日期"),
    current_admin: AdminUser = Depends(get_current_admin),
    db: Session = Depends(get_db)
):
    """获取用户统计概览"""
    service = AdminStatsService(db)
    try:
        return await service.get_user_overview(start_date, end_date)
    except Exception:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail={"code": "DATABASE_ERROR", "message": "查询失败"}
        )


@router.get("/users/growth-trend", response_model=list[UserGrowthItem])
async def get_user_growth_trend(
    start_date: date = Query(..., description="开始日期"),
    end_date: date = Query(..., description="结束日期"),
    current_admin: AdminUser = Depends(get_current_admin),
    db: Session = Depends(get_db)
):
    """获取用户增长趋势"""
    service = AdminStatsService(db)
    try:
        return await service.get_user_growth_trend(start_date, end_date)
    except Exception:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail={"code": "DATABASE_ERROR", "message": "查询失败"}
        )


# ==================== 业务统计接口 ====================

@router.get("/business/overview", response_model=BusinessOverviewResponse)
async def get_business_overview(
    start_date: Optional[date] = Query(None, description="开始日期"),
    end_date: Optional[date] = Query(None, description="结束日期"),
    current_admin: AdminUser = Depends(get_current_admin),
    db: Session = Depends(get_db)
):
    """获取业务统计概览"""
    service = AdminStatsService(db)
    try:
        return await service.get_business_overview(start_date, end_date)
    except Exception:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail={"code": "DATABASE_ERROR", "message": "查询失败"}
        )


@router.get("/business/trend", response_model=list[BusinessTrendItem])
async def get_business_trend(
    start_date: date = Query(..., description="开始日期"),
    end_date: date = Query(..., description="结束日期"),
    current_admin: AdminUser = Depends(get_current_admin),
    db: Session = Depends(get_db)
):
    """获取业务趋势"""
    service = AdminStatsService(db)
    try:
        return await service.get_business_trend(start_date, end_date)
    except Exception:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail={"code": "DATABASE_ERROR", "message": "查询失败"}
        )


# ==================== 模型统计接口 ====================

@router.get("/models/usage-ranking", response_model=list[ModelRankingItem])
async def get_model_usage_ranking(
    start_date: Optional[date] = Query(None, description="开始日期"),
    end_date: Optional[date] = Query(None, description="结束日期"),
    top_n: int = Query(10, ge=1, le=100, description="返回Top N个模型"),
    current_admin: AdminUser = Depends(get_current_admin),
    db: Session = Depends(get_db)
):
    """获取模型使用排行"""
    service = AdminStatsService(db)
    try:
        return await service.get_model_usage_ranking(start_date, end_date, top_n)
    except Exception:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail={"code": "DATABASE_ERROR", "message": "查询失败"}
        )


# ==================== 仪表盘接口 ====================

@router.get("/dashboard", response_model=DashboardMetricsResponse)
async def get_dashboard_metrics(
    current_admin: AdminUser = Depends(get_current_admin),
    db: Session = Depends(get_db)
):
    """获取仪表盘核心指标"""
    service = AdminStatsService(db)
    try:
        return await service.get_dashboard_metrics()
    except Exception:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail={"code": "DATABASE_ERROR", "message": "查询失败"}
        )