package ms_manage

import (
	"context"
	"log/slog"
	"runtime/debug"
	"time"

	apiproto "joylink.club/bj-rtsts-server/grpcproto"
	"joylink.club/bj-rtsts-server/message_server/ms_api"
)

type MsgServer struct {
	ms_api.IMsgServer
	ctx      context.Context
	cancelFn context.CancelFunc
}

// 消息服务管理map
var servers map[string]*MsgServer = make(map[string]*MsgServer)

// 注册消息服务
func Register(server ms_api.IMsgServer) *MsgServer {
	ms := &MsgServer{
		IMsgServer: server,
	}
	ctx, cancelFn := context.WithCancel(context.Background())
	ms.ctx = ctx
	ms.cancelFn = cancelFn
	go run(ms)
	servers[server.GetChannel()] = ms
	return ms
}

// 注销消息服务
func Unregister(server ms_api.IMsgServer) {
	if server == nil {
		return
	}
	s := servers[server.GetChannel()]
	s.cancelFn()
	delete(servers, server.GetChannel())
}

// 消息服务运行
func run(server *MsgServer) {
	defer func() {
		if err := recover(); err != nil {
			slog.Error("消息服务运行异常", "channel", server.GetChannel(), "error", err, "stack", string(debug.Stack()))
			debug.PrintStack()
		}
	}()
	for {
		select {
		case <-server.ctx.Done():
			slog.Info("消息服务退出", "channel", server.GetChannel())
			return
		default:
		}
		topicMsgs, err := server.OnTick()
		if err != nil {
			server.OnError(err)
			slog.Error("消息服务构建定时发送消息错误,服务退出", "channel", server.GetChannel(), "error", err)
			break
		}
		if len(topicMsgs) > 0 {
			for _, msg := range topicMsgs {
				apiproto.PublishMsg(msg.Channel, msg.Data)
			}
		}
		time.Sleep(server.GetInterval())
	}
}