"""
Agent 监控 API — 提供 Agent 专属统计数据
"""
from fastapi import APIRouter, Depends, Query
from sqlalchemy.orm import Session
from typing import Optional
from app.core.database import get_db
from app.api.auth import get_current_user
from app.models.user import User
from app.services.agent_monitoring_service import AgentMonitoringService

router = APIRouter(
    prefix="/api/v1/agent-monitoring",
    tags=["agent-monitoring"],
    responses={
        401: {"description": "未授权"},
        403: {"description": "无权访问"},
    },
)


@router.get("/overview")
async def get_agent_overview(
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    """Agent 概览统计：Agent 数、对话次数、LLM 调用次数、Token 用量、工具调用次数。"""
    user_id = None if current_user.role == "admin" else current_user.id
    return AgentMonitoringService.get_overview(db, user_id)


@router.get("/llm-calls")
async def get_llm_calls(
    days: int = Query(7, ge=1, le=30, description="统计天数"),
    limit: int = Query(50, ge=1, le=200, description="返回条数"),
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    """最近 LLM 调用记录列表。"""
    user_id = None if current_user.role == "admin" else current_user.id
    return AgentMonitoringService.get_llm_calls(db, user_id, days, limit)


@router.get("/agents-stats")
async def get_agent_stats(
    days: int = Query(7, ge=1, le=30, description="统计天数"),
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    """各 Agent 用量统计（按 Agent 分组）。"""
    user_id = None if current_user.role == "admin" else current_user.id
    return AgentMonitoringService.get_agent_stats(db, user_id, days)


@router.get("/tool-usage")
async def get_tool_usage(
    days: int = Query(7, ge=1, le=30, description="统计天数"),
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    """工具调用频次统计。"""
    user_id = None if current_user.role == "admin" else current_user.id
    return AgentMonitoringService.get_tool_usage(db, user_id, days)


@router.get("/daily-trend")
async def get_daily_trend(
    days: int = Query(7, ge=1, le=30, description="统计天数"),
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    """每日 LLM 调用趋势。"""
    user_id = None if current_user.role == "admin" else current_user.id
    return AgentMonitoringService.get_daily_trend(db, user_id, days)