package redpacket

import (
	"app/commons/constant"
	"app/commons/core"
	"app/commons/i18n"
	"app/commons/model/entity"
	"app/commons/services"
	"app/telegram"
	"fmt"
	"github.com/gin-gonic/gin"
	"github.com/shopspring/decimal"
	"time"
)

// SendRedPacket 发红包
func (s *Server) SendRedPacket(ctx *gin.Context) {
	c := s.FromContext(ctx)

	type request struct {
		GroupID       string          `json:"groupId" binding:"required"`     // Telegram群组ID
		TotalAmount   decimal.Decimal `json:"totalAmount" binding:"required"` // 红包总金额
		TotalCount    int             `json:"totalCount" binding:"required"`  // 红包个数
		PacketType    int             `json:"packetType" binding:"required"`  // 1=普通, 2=手气
		Symbol        string          `json:"symbol"`                         // 币种，默认VND
		BlessingWords string          `json:"blessingWords"`                  // 祝福语
		ExpireMinutes int             `json:"expireMinutes"`                  // 过期时间(分钟)，默认10
		MaxGrabAmount decimal.Decimal `json:"maxGrabAmount"`                  // 单人最大可领取金额(0=不限制)
		Lang          string          `json:"lang"`                           // 消息语言: vi/id/en/zh
	}

	req := new(request)
	if err := c.ShouldBindBodyWithJSON(req); err != nil {
		c.Fail(constant.ErrorParams)
		return
	}

	// 防刷控制（3秒内不能重复发）
	if !c.RepeatFilter(fmt.Sprintf("SendRedPacket:%d", c.UserId()), time.Second*3) {
		c.Fail(constant.ErrorFrequent)
		return
	}

	// 默认语言
	if req.Lang == "" {
		req.Lang = "vi"
	}

	// 默认币种（根据语言）
	if req.Symbol == "" {
		req.Symbol = i18n.DefaultSymbol(req.Lang)
	}

	// 创建红包
	packet, err := s.RedPacketService.CreateRedPacket(
		c.UserId(),
		req.GroupID,
		req.PacketType,
		req.TotalAmount,
		req.TotalCount,
		req.Symbol,
		req.BlessingWords,
		req.ExpireMinutes,
		req.MaxGrabAmount,
		req.Lang,
	)

	if err != nil {
		c.Fail(err.Error())
		return
	}

	// 发送到 Telegram 群组并保存消息ID
	go func() {
		userSendToTelegram(packet, "System", req.ExpireMinutes, req.Lang)
	}()

	c.Resp(gin.H{
		"packetId": packet.Id,
		"packetNo": packet.PacketNo,
		"message":  "红包发送成功",
	})
}

// userSendToTelegram 用户发红包到Telegram群组并保存消息ID
func userSendToTelegram(packet *entity.TgRedPacket, senderName string, expireMinutes int, lang string) {
	if packet == nil {
		return
	}

	// 调用 telegram 包的发送函数，获取返回的消息ID
	msgId := telegram.SendRedPacketToGroup(
		packet.GroupId,
		packet.PacketNo,
		senderName,
		packet.TotalAmount.InexactFloat64(),
		packet.TotalCount,
		packet.PacketType,
		packet.BlessingWords,
		expireMinutes,
		lang,
		packet.Symbol,
	)

	// 保存 Telegram 消息ID到红包记录
	if msgId > 0 {
		db := services.NewComService().DB()
		db.Model(&entity.TgRedPacket{}).Where("id = ?", packet.Id).Update("message_id", msgId)
	}

	core.Log.Infof("红包已发送到Telegram群组 - PacketNo: %s, GroupID: %s, MessageID: %d",
		packet.PacketNo, packet.GroupId, msgId)
}