package danmaku

import (
	"dcg/config"
	"dcg/game/command"
	"dcg/game/pb"
	pbMq "dcg/game/pb/mq"
	"dcg/game/svc"
	"dcg/pkg/kafka"
	"dcg/pkg/logger"
	"github.com/Shopify/sarama"
	"github.com/golang/protobuf/proto"
	"regexp"
)

type MsgToDbHandler struct {
	ctx            *svc.ServiceContext
	msgHandle      map[string]msgHandlerFunc
	regex          *regexp.Regexp
	commandManager *command.Manager
	ConsumerGroup  *kafka.ConsumerGroup
}

func (h *MsgToDbHandler) Init(ctx *svc.ServiceContext) {
	h.ctx = ctx

	cfg := config.Config.Kafka.Danmaku
	h.msgHandle = make(map[string]msgHandlerFunc)
	h.msgHandle["danmaku"] = h.handleDanmaku

	h.commandManager = command.NewManager()
	h.commandManager.Register("j", h.handleAllCmd)
	h.commandManager.Register("c", h.handleAllCmd)
	h.commandManager.Register("s", h.handleAllCmd)
	h.commandManager.Register("m", h.handleAllCmd)
	h.commandManager.Register("w", h.handleAllCmd)

	var err error
	h.regex, err = regexp.Compile(config.Config.Command.Regex)
	if err != nil {
		logger.SLog.Error(err)
	}

	h.ConsumerGroup, err = kafka.NewConsumerGroup(&kafka.ConsumerGroupConfig{
		KafkaVersion:   sarama.V3_1_0_0,
		OffsetsInitial: sarama.OffsetNewest,
		IsReturnErr:    false,
	}, cfg.Addr, []string{cfg.Topic}, config.Config.ConsumerGroupId.MsgToDb)

	if err != nil {
		logger.SLog.Error(err)
	}
}

func (h *MsgToDbHandler) handleAllCmd(_ string, user *pb.User) {

}

func (h *MsgToDbHandler) handleDanmaku(data []byte, msgKey string) {
	// danmaku msg proto
	var msgFromMq pbMq.MqDanmaku
	err := proto.Unmarshal(data, &msgFromMq)
	if err != nil {
		logger.SLog.Error("unmarshal msg err", err)
		return
	}
	cmdArr := h.parseCommands(msgFromMq.Content)
	for _, cmd := range cmdArr {
		h.commandManager.Handle(cmd, &pb.User{
			UId:   msgFromMq.Uid,
			Uname: msgFromMq.Uname,
		})
	}
}

func (h *MsgToDbHandler) parseCommands(msg string) []string {
	if h.regex == nil {
		logger.SLog.Error("regex is null")
		return []string{}
	}
	return h.regex.FindAllString(msg, -1)
}

func (MsgToDbHandler) Setup(_ sarama.ConsumerGroupSession) error   { return nil }
func (MsgToDbHandler) Cleanup(_ sarama.ConsumerGroupSession) error { return nil }
func (h *MsgToDbHandler) ConsumeClaim(sess sarama.ConsumerGroupSession,
	claim sarama.ConsumerGroupClaim) error {
	for msg := range claim.Messages() {
		if hFunc, ok := h.msgHandle[msg.Topic]; ok {
			hFunc(msg.Value, string(msg.Key))
		}
		sess.MarkMessage(msg, "")
	}
	return nil
}