"""
日志管理接口
"""
from fastapi import APIRouter, Depends, Query
from fastapi.responses import StreamingResponse
from sqlalchemy.orm import Session
from sqlalchemy import or_, and_
from app.database import get_db
from app.api.deps import get_current_admin
from app.models.api_log import APILog
from datetime import datetime, timedelta
import csv
import io

router = APIRouter()

@router.get("")
async def get_logs(
    page: int = Query(1, ge=1),
    page_size: int = Query(10, ge=1, le=100),
    keyword: str = Query(None, description="搜索关键词（接口路径）"),
    user_id: int = Query(None, description="用户ID筛选"),
    endpoint: str = Query(None, description="接口筛选"),
    method: str = Query(None, description="方法筛选"),
    response_code: int = Query(None, description="状态码筛选"),
    start_time: str = Query(None, description="开始时间"),
    end_time: str = Query(None, description="结束时间"),
    db: Session = Depends(get_db),
    current_admin = Depends(get_current_admin)
):
    """获取日志列表"""
    offset = (page - 1) * page_size
    
    query = db.query(APILog)
    
    # 搜索
    if keyword:
        query = query.filter(APILog.endpoint.like(f"%{keyword}%"))
    
    # 筛选
    if user_id is not None:
        query = query.filter(APILog.user_id == user_id)
    if endpoint:
        query = query.filter(APILog.endpoint.like(f"%{endpoint}%"))
    if method:
        query = query.filter(APILog.method == method)
    if response_code is not None:
        query = query.filter(APILog.response_code == response_code)
    if start_time:
        try:
            start_dt = datetime.fromisoformat(start_time.replace('Z', '+00:00'))
            query = query.filter(APILog.created_at >= start_dt)
        except:
            pass
    if end_time:
        try:
            end_dt = datetime.fromisoformat(end_time.replace('Z', '+00:00'))
            query = query.filter(APILog.created_at <= end_dt)
        except:
            pass
    
    # 排序和分页
    total = query.count()
    logs = query.order_by(APILog.created_at.desc()).offset(offset).limit(page_size).all()
    
    return {
        "code": 200,
        "msg": "成功",
        "data": [
            {
                "id": l.id,
                "user_id": l.user_id,
                "endpoint": l.endpoint,
                "method": l.method,
                "ip_address": l.ip_address,
                "user_agent": l.user_agent,
                "response_code": l.response_code,
                "execution_time": l.execution_time,
                "created_at": l.created_at.isoformat() if l.created_at else None
            }
            for l in logs
        ],
        "total": total,
        "page": page,
        "page_size": page_size
    }

@router.get("/{log_id}")
async def get_log_detail(
    log_id: int,
    db: Session = Depends(get_db),
    current_admin = Depends(get_current_admin)
):
    """获取日志详情"""
    log = db.query(APILog).filter(APILog.id == log_id).first()
    if not log:
        return {"code": 404, "msg": "日志不存在"}
    
    return {
        "code": 200,
        "msg": "成功",
        "data": {
            "id": log.id,
            "user_id": log.user_id,
            "endpoint": log.endpoint,
            "method": log.method,
            "request_data": log.request_data,
            "response_data": log.response_data,
            "ip_address": log.ip_address,
            "user_agent": log.user_agent,
            "response_code": log.response_code,
            "execution_time": log.execution_time,
            "created_at": log.created_at.isoformat() if log.created_at else None
        }
    }

@router.delete("")
async def clear_logs(
    db: Session = Depends(get_db),
    current_admin = Depends(get_current_admin)
):
    """清空日志"""
    try:
        db.query(APILog).delete()
        db.commit()
        return {"code": 200, "msg": "清空成功"}
    except Exception as e:
        db.rollback()
        return {"code": 500, "msg": f"清空失败: {str(e)}"}

@router.get("/export/csv")
async def export_logs_csv(
    keyword: str = Query(None),
    user_id: int = Query(None),
    endpoint: str = Query(None),
    method: str = Query(None),
    response_code: int = Query(None),
    start_time: str = Query(None),
    end_time: str = Query(None),
    db: Session = Depends(get_db),
    current_admin = Depends(get_current_admin)
):
    """导出日志为CSV"""
    query = db.query(APILog)
    
    # 应用相同的筛选条件
    if keyword:
        query = query.filter(APILog.endpoint.like(f"%{keyword}%"))
    if user_id is not None:
        query = query.filter(APILog.user_id == user_id)
    if endpoint:
        query = query.filter(APILog.endpoint.like(f"%{endpoint}%"))
    if method:
        query = query.filter(APILog.method == method)
    if response_code is not None:
        query = query.filter(APILog.response_code == response_code)
    if start_time:
        try:
            start_dt = datetime.fromisoformat(start_time.replace('Z', '+00:00'))
            query = query.filter(APILog.created_at >= start_dt)
        except:
            pass
    if end_time:
        try:
            end_dt = datetime.fromisoformat(end_time.replace('Z', '+00:00'))
            query = query.filter(APILog.created_at <= end_dt)
        except:
            pass
    
    logs = query.order_by(APILog.created_at.desc()).all()
    
    # 生成CSV
    output = io.StringIO()
    writer = csv.writer(output)
    writer.writerow(['ID', '用户ID', '接口', '方法', 'IP地址', '用户代理', '状态码', '执行时间(ms)', '创建时间'])
    
    for log in logs:
        writer.writerow([
            log.id,
            log.user_id or '',
            log.endpoint,
            log.method,
            log.ip_address or '',
            log.user_agent or '',
            log.response_code or '',
            log.execution_time or '',
            log.created_at.isoformat() if log.created_at else ''
        ])
    
    output.seek(0)
    return StreamingResponse(
        iter([output.getvalue()]),
        media_type="text/csv",
        headers={"Content-Disposition": f"attachment; filename=logs_{datetime.now().strftime('%Y%m%d_%H%M%S')}.csv"}
    )

@router.get("/export/excel")
async def export_logs(
    keyword: str = Query(None),
    user_id: int = Query(None),
    endpoint: str = Query(None),
    method: str = Query(None),
    response_code: int = Query(None),
    start_time: str = Query(None),
    end_time: str = Query(None),
    db: Session = Depends(get_db),
    current_admin = Depends(get_current_admin)
):
    """导出日志为Excel"""
    # 暂时使用CSV格式，如果需要Excel格式可以安装openpyxl
    return await export_logs_csv(
        keyword=keyword,
        user_id=user_id,
        endpoint=endpoint,
        method=method,
        response_code=response_code,
        start_time=start_time,
        end_time=end_time,
        db=db,
        current_admin=current_admin
    )