package logic

import (
	"context"
	"fusenapi/constants"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"time"

	"fusenapi/server/websocket/internal/svc"
	"fusenapi/server/websocket/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type CommonNotifyLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewCommonNotifyLogic(ctx context.Context, svcCtx *svc.ServiceContext) *CommonNotifyLogic {
	return &CommonNotifyLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// 定义公共回调未找到websocket连接时暂存数据缓冲队列
var commonConnectionNotFoundDataCacheChan = make(chan commonConnectionNotFoundDataCacheChanItem, 2000)

type commonConnectionNotFoundDataCacheChanItem struct {
	retryTimes int                   //重回队列次数
	data       types.CommonNotifyReq //数据
}

// 放入缓冲队列
func pushCommonNotifyCache(data commonConnectionNotFoundDataCacheChanItem) {
	select {
	case commonConnectionNotFoundDataCacheChan <- data:
		return
	case <-time.After(time.Millisecond * 50): //超50ms就丢弃
		return
	}
}

// 取出元素
func popCommonNotifyCache() (data commonConnectionNotFoundDataCacheChanItem) {
	return <-commonConnectionNotFoundDataCacheChan
}

// 消费公共通知未处理的消息(目前是轮巡方式，待优化)
func ConsumeCommonCacheData(ctx context.Context) {
	defer func() {
		if err := recover(); err != nil {
			logx.Error("consumeCommonCacheData panic :", err)
		}
	}()
	go func() {
		select {
		case <-ctx.Done():
			panic("consumeCommonCacheData ctx deadline")
		}
	}()
	for {
		time.Sleep(time.Millisecond * 200)
		info := popCommonNotifyCache()
		//查询websocket连接
		value, ok := mapConnPool.Load(info.data.Wid)
		//没有连接
		if !ok {
			info.retryTimes--
			//大于0，则放回队列
			if info.retryTimes > 0 {
				pushCommonNotifyCache(info)
				continue
			}
			//否则直接丢弃消息
			continue
		}
		//断言连接
		ws, ok := value.(wsConnectItem)
		if !ok {
			logx.Error("渲染回调断言websocket连接失败")
			continue
		}
		//发送
		ws.sendToOutChan(ws.respondDataFormat(constants.WEBSOCKET_COMMON_NOTIFY, info.data.Data))
	}
}

// 处理进入前逻辑w,r
// func (l *CommonNotifyLogic) BeforeLogic(w http.ResponseWriter, r *http.Request) {
// }

func (l *CommonNotifyLogic) CommonNotify(req *types.CommonNotifyReq, userinfo *auth.UserInfo) (resp *basic.Response) {
	searchConnectType := "uniqueId"
	if req.Wid == "" {
		if req.UserId == 0 && req.GuestId == 0 {
			return resp.SetStatusWithMessage(basic.CodeOK, "用户信息或者连接标识必须保证至少有其中一个")
		}
		searchConnectType = "userInfo"
	}
	switch searchConnectType {
	case "uniqueId": //直接通过唯一标识发消息
		//查询websocket连接
		value, ok := mapConnPool.Load(req.Wid)
		if !ok {
			//没找到连接就放到公共缓冲队列
			pushCommonNotifyCache(commonConnectionNotFoundDataCacheChanItem{
				retryTimes: 20, //重试20次
				data: types.CommonNotifyReq{
					Wid:  req.Wid,
					Data: req.Data,
				},
			})
			return resp.SetStatusWithMessage(basic.CodeOK, "success")
		}
		//断言连接
		ws, ok := value.(wsConnectItem)
		if !ok {
			logx.Error("渲染回调断言websocket连接失败")
			return resp.SetStatusWithMessage(basic.CodeServiceErr, "断言连接错误")
		}
		ws.sendToOutChan(ws.respondDataFormat(constants.WEBSOCKET_COMMON_NOTIFY, req.Data))
	case "userInfo": //通过用户信息找连接发送
		sendToOutChanByUserIndex(req.UserId, req.GuestId, (&wsConnectItem{}).respondDataFormat(constants.WEBSOCKET_COMMON_NOTIFY, req.Data))
	}
	return resp.SetStatusWithMessage(basic.CodeOK, "success")
}

// 处理逻辑后 w,r 如:重定向, resp 必须重新处理
// func (l *CommonNotifyLogic) AfterLogic(w http.ResponseWriter, r *http.Request, resp *basic.Response) {
// // httpx.OkJsonCtx(r.Context(), w, resp)
// }