package MessageHandlers

import (
	"context"
	"github.com/zeromicro/go-zero/core/logx"
	"wechat-api/internal/pkg/wechat_ws"
	"wechat-api/internal/svc"
)

// MessageHandlerStrategy 消息处理策略接口
type MessageHandlerStrategy interface {
	Handle(ctx context.Context, msg *wechat_ws.MsgJsonObject, svcCtx *svc.ServiceContext) error
}

type MessageHandler struct {
	strategies map[string]MessageHandlerStrategy
	svcCtx     *svc.ServiceContext
}

func NewMessageHandler(svcCtx *svc.ServiceContext) *MessageHandler {
	return &MessageHandler{
		strategies: make(map[string]MessageHandlerStrategy),
		svcCtx:     svcCtx,
	}
}

// RegisterStrategy 注册消息处理策略
func (h *MessageHandler) RegisterStrategy(msgType string, strategy MessageHandlerStrategy) {
	h.strategies[msgType] = strategy
}

// Handle 根据 msgType 处理消息
func (h *MessageHandler) Handle(ctx context.Context, msg *wechat_ws.MsgJsonObject) error {
	strategy, exists := h.strategies[msg.MsgType]
	if !exists {
		logx.Error("No handler registered for msgType: %s", msg.MsgType)
		return nil
	}
	return strategy.Handle(ctx, msg, h.svcCtx)
}

// RegisterStrategies 使用映射表注册所有策略
func (h *MessageHandler) RegisterStrategies() {
	strategyMap := map[string]func(*svc.ServiceContext) MessageHandlerStrategy{
		"FriendPushNotice": func(svcCtx *svc.ServiceContext) MessageHandlerStrategy {
			return NewFriendPushNoticeTypeHandler(svcCtx)
		},
		"ChatroomPushNotice": func(svcCtx *svc.ServiceContext) MessageHandlerStrategy {
			return NewChatroomPushNoticeTypeHandler(svcCtx)
		},
	}
	for msgType, strategyFunc := range strategyMap {
		h.RegisterStrategy(msgType, strategyFunc(h.svcCtx))
	}
}