// Copyright © 2023 OpenIM. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package msg

import (
	"context"
	"encoding/json"
	"time"

	"git.imall.cloud/openim/open-im-server-deploy/pkg/apistruct"
	"git.imall.cloud/openim/open-im-server-deploy/pkg/authverify"
	"git.imall.cloud/openim/open-im-server-deploy/pkg/common/storage/model"
	"git.imall.cloud/openim/open-im-server-deploy/pkg/msgprocessor"
	"git.imall.cloud/openim/open-im-server-deploy/pkg/util/conversationutil"
	"git.imall.cloud/openim/protocol/constant"
	"git.imall.cloud/openim/protocol/msg"
	"git.imall.cloud/openim/protocol/sdkws"
	"github.com/openimsdk/tools/errs"
	"github.com/openimsdk/tools/log"
	"github.com/openimsdk/tools/utils/datautil"
	"github.com/openimsdk/tools/utils/jsonutil"
	"github.com/openimsdk/tools/utils/timeutil"
)

func (m *msgServer) PullMessageBySeqs(ctx context.Context, req *sdkws.PullMessageBySeqsReq) (*sdkws.PullMessageBySeqsResp, error) {
	if err := authverify.CheckAccess(ctx, req.UserID); err != nil {
		return nil, err
	}
	// 设置请求超时，防止大量数据拉取导致pod异常
	// 对于大量大群用户，需要更长的超时时间（60秒）
	queryTimeout := 60 * time.Second
	queryCtx, cancel := context.WithTimeout(ctx, queryTimeout)
	defer cancel()

	// 参数验证：限制 SeqRanges 数量和每个范围的大小，防止内存溢出
	const maxSeqRanges = 100
	const maxSeqRangeSize = 10000
	// 限制响应总大小，防止pod内存溢出（估算：每条消息平均1KB，最多50MB）
	const maxTotalMessages = 50000
	if len(req.SeqRanges) > maxSeqRanges {
		log.ZWarn(ctx, "SeqRanges count exceeds limit", nil, "count", len(req.SeqRanges), "limit", maxSeqRanges)
		return nil, errs.ErrArgs.WrapMsg("too many seq ranges", "count", len(req.SeqRanges), "limit", maxSeqRanges)
	}
	for _, seq := range req.SeqRanges {
		// 验证每个 seq range 的合理性
		if seq.Begin < 0 || seq.End < 0 {
			log.ZWarn(ctx, "invalid seq range: negative values", nil, "begin", seq.Begin, "end", seq.End)
			continue
		}
		if seq.End < seq.Begin {
			log.ZWarn(ctx, "invalid seq range: end < begin", nil, "begin", seq.Begin, "end", seq.End)
			continue
		}
		seqRangeSize := seq.End - seq.Begin + 1
		if seqRangeSize > maxSeqRangeSize {
			log.ZWarn(ctx, "seq range size exceeds limit, will be limited", nil, "conversationID", seq.ConversationID, "begin", seq.Begin, "end", seq.End, "size", seqRangeSize, "limit", maxSeqRangeSize)
		}
	}
	resp := &sdkws.PullMessageBySeqsResp{}
	resp.Msgs = make(map[string]*sdkws.PullMsgs)
	resp.NotificationMsgs = make(map[string]*sdkws.PullMsgs)

	var totalMessages int
	for _, seq := range req.SeqRanges {
		// 检查总消息数，防止内存溢出
		if totalMessages >= maxTotalMessages {
			log.ZWarn(ctx, "total messages count exceeds limit, stopping", nil, "totalMessages", totalMessages, "limit", maxTotalMessages)
			break
		}
		if !msgprocessor.IsNotification(seq.ConversationID) {
			conversation, err := m.ConversationLocalCache.GetConversation(queryCtx, req.UserID, seq.ConversationID)
			if err != nil {
				log.ZError(ctx, "GetConversation error", err, "conversationID", seq.ConversationID)
				continue
			}
			minSeq, maxSeq, msgs, err := m.MsgDatabase.GetMsgBySeqsRange(queryCtx, req.UserID, seq.ConversationID,
				seq.Begin, seq.End, seq.Num, conversation.MaxSeq)
			if err != nil {
				// 如果是超时错误，记录更详细的日志
				if queryCtx.Err() == context.DeadlineExceeded {
					log.ZWarn(ctx, "GetMsgBySeqsRange timeout", err, "conversationID", seq.ConversationID, "seq", seq, "timeout", queryTimeout)
					return nil, errs.ErrInternalServer.WrapMsg("message pull timeout, data too large or query too slow")
				}
				log.ZWarn(ctx, "GetMsgBySeqsRange error", err, "conversationID", seq.ConversationID, "seq", seq)
				continue
			}
			totalMessages += len(msgs)
			var isEnd bool
			switch req.Order {
			case sdkws.PullOrder_PullOrderAsc:
				isEnd = maxSeq <= seq.End
			case sdkws.PullOrder_PullOrderDesc:
				isEnd = seq.Begin <= minSeq
			}
			if len(msgs) == 0 {
				log.ZWarn(ctx, "not have msgs", nil, "conversationID", seq.ConversationID, "seq", seq)
				continue
			}
			// 过滤禁言通知消息（只保留群主、管理员和被禁言成员本人可以看到的）
			msgs = m.filterMuteNotificationMsgs(ctx, req.UserID, seq.ConversationID, msgs)
			// 填充红包消息的领取信息
			msgs = m.enrichRedPacketMessages(ctx, req.UserID, msgs)
			resp.Msgs[seq.ConversationID] = &sdkws.PullMsgs{Msgs: msgs, IsEnd: isEnd}
		} else {
			// 限制通知消息的查询范围，防止内存溢出
			const maxNotificationSeqRange = 5000
			var seqs []int64
			seqRange := seq.End - seq.Begin + 1
			if seqRange > maxNotificationSeqRange {
				log.ZWarn(ctx, "notification seq range too large, limiting", nil, "conversationID", seq.ConversationID, "begin", seq.Begin, "end", seq.End, "range", seqRange, "limit", maxNotificationSeqRange)
				// 只取最后 maxNotificationSeqRange 条
				for i := seq.End - maxNotificationSeqRange + 1; i <= seq.End; i++ {
					seqs = append(seqs, i)
				}
			} else {
				for i := seq.Begin; i <= seq.End; i++ {
					seqs = append(seqs, i)
				}
			}
			minSeq, maxSeq, notificationMsgs, err := m.MsgDatabase.GetMsgBySeqs(queryCtx, req.UserID, seq.ConversationID, seqs)
			if err != nil {
				// 如果是超时错误，记录更详细的日志
				if queryCtx.Err() == context.DeadlineExceeded {
					log.ZWarn(ctx, "GetMsgBySeqs timeout", err, "conversationID", seq.ConversationID, "seq", seq, "timeout", queryTimeout)
					return nil, errs.ErrInternalServer.WrapMsg("notification message pull timeout, data too large or query too slow")
				}
				log.ZWarn(ctx, "GetMsgBySeqs error", err, "conversationID", seq.ConversationID, "seq", seq)
				continue
			}
			totalMessages += len(notificationMsgs)
			var isEnd bool
			switch req.Order {
			case sdkws.PullOrder_PullOrderAsc:
				isEnd = maxSeq <= seq.End
			case sdkws.PullOrder_PullOrderDesc:
				isEnd = seq.Begin <= minSeq
			}
			if len(notificationMsgs) == 0 {
				log.ZWarn(ctx, "not have notificationMsgs", nil, "conversationID", seq.ConversationID, "seq", seq)

				continue
			}
			// 过滤禁言通知消息（只保留群主、管理员和被禁言成员本人可以看到的）
			notificationMsgs = m.filterMuteNotificationMsgs(ctx, req.UserID, seq.ConversationID, notificationMsgs)
			// 填充红包消息的领取信息
			notificationMsgs = m.enrichRedPacketMessages(ctx, req.UserID, notificationMsgs)
			resp.NotificationMsgs[seq.ConversationID] = &sdkws.PullMsgs{Msgs: notificationMsgs, IsEnd: isEnd}
		}
	}
	return resp, nil
}

func (m *msgServer) GetSeqMessage(ctx context.Context, req *msg.GetSeqMessageReq) (*msg.GetSeqMessageResp, error) {
	resp := &msg.GetSeqMessageResp{
		Msgs:             make(map[string]*sdkws.PullMsgs),
		NotificationMsgs: make(map[string]*sdkws.PullMsgs),
	}
	for _, conv := range req.Conversations {
		isEnd, endSeq, msgs, err := m.MsgDatabase.GetMessagesBySeqWithBounds(ctx, req.UserID, conv.ConversationID, conv.Seqs, req.GetOrder())
		if err != nil {
			return nil, err
		}
		var pullMsgs *sdkws.PullMsgs
		if ok := false; conversationutil.IsNotificationConversationID(conv.ConversationID) {
			pullMsgs, ok = resp.NotificationMsgs[conv.ConversationID]
			if !ok {
				pullMsgs = &sdkws.PullMsgs{}
				resp.NotificationMsgs[conv.ConversationID] = pullMsgs
			}
		} else {
			pullMsgs, ok = resp.Msgs[conv.ConversationID]
			if !ok {
				pullMsgs = &sdkws.PullMsgs{}
				resp.Msgs[conv.ConversationID] = pullMsgs
			}
		}
		// 过滤禁言通知消息（只保留群主、管理员和被禁言成员本人可以看到的）
		filteredMsgs := m.filterMuteNotificationMsgs(ctx, req.UserID, conv.ConversationID, msgs)
		// 填充红包消息的领取信息
		filteredMsgs = m.enrichRedPacketMessages(ctx, req.UserID, filteredMsgs)
		pullMsgs.Msgs = append(pullMsgs.Msgs, filteredMsgs...)
		pullMsgs.IsEnd = isEnd
		pullMsgs.EndSeq = endSeq
	}
	return resp, nil
}

// filterMuteNotificationMsgs 过滤禁言、取消禁言、踢出群聊、退出群聊、进入群聊、群成员信息设置和角色变更通知消息，只保留群主、管理员和相关成员本人可以看到的消息
func (m *msgServer) filterMuteNotificationMsgs(ctx context.Context, userID, conversationID string, msgs []*sdkws.MsgData) []*sdkws.MsgData {
	// 如果不是群聊会话，直接返回
	if !conversationutil.IsGroupConversationID(conversationID) {
		return msgs
	}

	// 提取群ID
	groupID := conversationutil.GetGroupIDFromConversationID(conversationID)
	if groupID == "" {
		log.ZWarn(ctx, "filterMuteNotificationMsgs: invalid group conversationID", nil, "conversationID", conversationID)
		return msgs
	}

	var filteredMsgs []*sdkws.MsgData
	var needCheckPermission bool

	// 先检查是否有需要过滤的消息
	for _, msg := range msgs {
		if msg.ContentType == constant.GroupMemberMutedNotification ||
			msg.ContentType == constant.GroupMemberCancelMutedNotification ||
			msg.ContentType == constant.MemberKickedNotification ||
			msg.ContentType == constant.MemberQuitNotification ||
			msg.ContentType == constant.MemberInvitedNotification ||
			msg.ContentType == constant.MemberEnterNotification ||
			msg.ContentType == constant.GroupMemberInfoSetNotification ||
			msg.ContentType == constant.GroupMemberSetToAdminNotification ||
			msg.ContentType == constant.GroupMemberSetToOrdinaryUserNotification {
			needCheckPermission = true
			break
		}
	}

	// 如果没有需要过滤的消息，直接返回
	if !needCheckPermission {
		return msgs
	}

	// 对于被踢出的用户，可能无法获取成员信息，需要特殊处理
	// 先收集所有被踢出的用户ID，以便后续判断
	var allKickedUserIDs []string
	if needCheckPermission {
		for _, msg := range msgs {
			if msg.ContentType == constant.MemberKickedNotification {
				var tips sdkws.MemberKickedTips
				if err := unmarshalNotificationContent(string(msg.Content), &tips); err == nil {
					kickedUserIDs := datautil.Slice(tips.KickedUserList, func(e *sdkws.GroupMemberFullInfo) string { return e.UserID })
					allKickedUserIDs = append(allKickedUserIDs, kickedUserIDs...)
				}
			}
		}
		allKickedUserIDs = datautil.Distinct(allKickedUserIDs)
	}

	// 检查用户是否是被踢出的用户（即使已经被踢出，也应该能看到自己被踢出的通知）
	isKickedUserInMsgs := datautil.Contain(userID, allKickedUserIDs...)

	// 获取当前用户在群中的角色（如果用户已经被踢出，这里会返回错误）
	// 添加超时保护，防止大群查询阻塞（3秒超时）
	memberCtx, cancel := context.WithTimeout(ctx, 3*time.Second)
	defer cancel()
	member, err := m.GroupLocalCache.GetGroupMember(memberCtx, groupID, userID)
	isOwnerOrAdmin := false
	if err != nil {
		if memberCtx.Err() == context.DeadlineExceeded {
			log.ZWarn(ctx, "filterMuteNotificationMsgs: GetGroupMember timeout", err, "groupID", groupID, "userID", userID)
		} else {
			log.ZDebug(ctx, "filterMuteNotificationMsgs: GetGroupMember failed (user may be kicked)", err, "groupID", groupID, "userID", userID, "isKickedUserInMsgs", isKickedUserInMsgs)
		}
		// 如果获取失败（可能已经被踢出或超时），仍然需要检查是否是相关成员本人
		// 继续处理，但 isOwnerOrAdmin 保持为 false
		// 如果是被踢出的用户，仍然可以查看自己被踢出的通知
	} else {
		isOwnerOrAdmin = member.RoleLevel == constant.GroupOwner || member.RoleLevel == constant.GroupAdmin
	}

	// 过滤消息
	for _, msg := range msgs {

		if msg.ContentType == constant.GroupMemberMutedNotification {
			var tips sdkws.GroupMemberMutedTips
			if err := unmarshalNotificationContent(string(msg.Content), &tips); err != nil {
				log.ZWarn(ctx, "filterMuteNotificationMsgs: unmarshal GroupMemberMutedTips failed", err)
				filteredMsgs = append(filteredMsgs, msg)
				continue
			}
			mutedUserID := tips.MutedUser.UserID
			if isOwnerOrAdmin || userID == mutedUserID {
				filteredMsgs = append(filteredMsgs, msg)
				log.ZDebug(ctx, "filterMuteNotificationMsgs: GroupMemberMutedNotification allowed", "userID", userID, "mutedUserID", mutedUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			} else {
				log.ZDebug(ctx, "filterMuteNotificationMsgs: GroupMemberMutedNotification filtered", "userID", userID, "mutedUserID", mutedUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			}
		} else if msg.ContentType == constant.GroupMemberCancelMutedNotification {
			var tips sdkws.GroupMemberCancelMutedTips
			if err := unmarshalNotificationContent(string(msg.Content), &tips); err != nil {
				log.ZWarn(ctx, "filterMuteNotificationMsgs: unmarshal GroupMemberCancelMutedTips failed", err)
				filteredMsgs = append(filteredMsgs, msg)
				continue
			}
			cancelMutedUserID := tips.MutedUser.UserID
			if isOwnerOrAdmin || userID == cancelMutedUserID {
				filteredMsgs = append(filteredMsgs, msg)
				log.ZDebug(ctx, "filterMuteNotificationMsgs: GroupMemberCancelMutedNotification allowed", "userID", userID, "cancelMutedUserID", cancelMutedUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			} else {
				log.ZDebug(ctx, "filterMuteNotificationMsgs: GroupMemberCancelMutedNotification filtered", "userID", userID, "cancelMutedUserID", cancelMutedUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			}
		} else if msg.ContentType == constant.MemberQuitNotification {
			var tips sdkws.MemberQuitTips
			if err := unmarshalNotificationContent(string(msg.Content), &tips); err != nil {
				log.ZWarn(ctx, "filterMuteNotificationMsgs: unmarshal MemberQuitTips failed", err)
				filteredMsgs = append(filteredMsgs, msg)
				continue
			}
			quitUserID := tips.QuitUser.UserID
			// 退出群聊通知只允许群主和管理员看到，退出者本人不通知
			if isOwnerOrAdmin {
				filteredMsgs = append(filteredMsgs, msg)
				log.ZDebug(ctx, "filterMuteNotificationMsgs: MemberQuitNotification allowed", "userID", userID, "quitUserID", quitUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			} else {
				log.ZDebug(ctx, "filterMuteNotificationMsgs: MemberQuitNotification filtered", "userID", userID, "quitUserID", quitUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			}
		} else if msg.ContentType == constant.MemberInvitedNotification {
			var tips sdkws.MemberInvitedTips
			if err := unmarshalNotificationContent(string(msg.Content), &tips); err != nil {
				log.ZWarn(ctx, "filterMuteNotificationMsgs: unmarshal MemberInvitedTips failed", err)
				filteredMsgs = append(filteredMsgs, msg)
				continue
			}
			// 获取被邀请的用户ID列表
			invitedUserIDs := datautil.Slice(tips.InvitedUserList, func(e *sdkws.GroupMemberFullInfo) string { return e.UserID })
			isInvitedUser := datautil.Contain(userID, invitedUserIDs...)
			// 邀请入群通知：允许群主、管理员和被邀请的用户本人看到
			if isOwnerOrAdmin || isInvitedUser {
				filteredMsgs = append(filteredMsgs, msg)
				log.ZDebug(ctx, "filterMuteNotificationMsgs: MemberInvitedNotification allowed", "userID", userID, "invitedUserIDs", invitedUserIDs, "isOwnerOrAdmin", isOwnerOrAdmin, "isInvitedUser", isInvitedUser)
			} else {
				log.ZDebug(ctx, "filterMuteNotificationMsgs: MemberInvitedNotification filtered", "userID", userID, "invitedUserIDs", invitedUserIDs, "isOwnerOrAdmin", isOwnerOrAdmin, "isInvitedUser", isInvitedUser)
			}
		} else if msg.ContentType == constant.MemberEnterNotification {
			var tips sdkws.MemberEnterTips
			if err := unmarshalNotificationContent(string(msg.Content), &tips); err != nil {
				log.ZWarn(ctx, "filterMuteNotificationMsgs: unmarshal MemberEnterTips failed", err)
				filteredMsgs = append(filteredMsgs, msg)
				continue
			}
			entrantUserID := tips.EntrantUser.UserID
			// 进入群聊通知只允许群主和管理员看到
			if isOwnerOrAdmin {
				filteredMsgs = append(filteredMsgs, msg)
				log.ZDebug(ctx, "filterMuteNotificationMsgs: MemberEnterNotification allowed", "userID", userID, "entrantUserID", entrantUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			} else {
				log.ZDebug(ctx, "filterMuteNotificationMsgs: MemberEnterNotification filtered", "userID", userID, "entrantUserID", entrantUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			}
		} else if msg.ContentType == constant.MemberKickedNotification {
			var tips sdkws.MemberKickedTips
			if err := unmarshalNotificationContent(string(msg.Content), &tips); err != nil {
				log.ZWarn(ctx, "filterMuteNotificationMsgs: unmarshal MemberKickedTips failed", err)
				filteredMsgs = append(filteredMsgs, msg)
				continue
			}
			// 获取被踢出的用户ID列表
			kickedUserIDs := datautil.Slice(tips.KickedUserList, func(e *sdkws.GroupMemberFullInfo) string { return e.UserID })
			isKickedUser := datautil.Contain(userID, kickedUserIDs...)
			// 被踢出群聊通知：允许群主、管理员和被踢出的用户本人看到
			if isOwnerOrAdmin || isKickedUser {
				filteredMsgs = append(filteredMsgs, msg)
				log.ZDebug(ctx, "filterMuteNotificationMsgs: MemberKickedNotification allowed", "userID", userID, "kickedUserIDs", kickedUserIDs, "isOwnerOrAdmin", isOwnerOrAdmin, "isKickedUser", isKickedUser)
			} else {
				log.ZDebug(ctx, "filterMuteNotificationMsgs: MemberKickedNotification filtered", "userID", userID, "kickedUserIDs", kickedUserIDs, "isOwnerOrAdmin", isOwnerOrAdmin, "isKickedUser", isKickedUser)
			}
		} else if msg.ContentType == constant.GroupMemberInfoSetNotification {
			var tips sdkws.GroupMemberInfoSetTips
			if err := unmarshalNotificationContent(string(msg.Content), &tips); err != nil {
				log.ZWarn(ctx, "filterMuteNotificationMsgs: unmarshal GroupMemberInfoSetTips failed", err)
				filteredMsgs = append(filteredMsgs, msg)
				continue
			}
			changedUserID := tips.ChangedUser.UserID
			// 群成员信息设置通知（如背景音）只允许群主和管理员看到
			if isOwnerOrAdmin {
				filteredMsgs = append(filteredMsgs, msg)
				log.ZDebug(ctx, "filterMuteNotificationMsgs: GroupMemberInfoSetNotification allowed", "userID", userID, "changedUserID", changedUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			} else {
				log.ZDebug(ctx, "filterMuteNotificationMsgs: GroupMemberInfoSetNotification filtered", "userID", userID, "changedUserID", changedUserID, "isOwnerOrAdmin", isOwnerOrAdmin)
			}
		} else if msg.ContentType == constant.GroupMemberSetToAdminNotification || msg.ContentType == constant.GroupMemberSetToOrdinaryUserNotification {
			var tips sdkws.GroupMemberInfoSetTips
			if err := unmarshalNotificationContent(string(msg.Content), &tips); err != nil {
				log.ZWarn(ctx, "filterMuteNotificationMsgs: unmarshal GroupMemberInfoSetTips failed", err)
				filteredMsgs = append(filteredMsgs, msg)
				continue
			}
			changedUserID := tips.ChangedUser.UserID
			// 设置为管理员/普通用户通知：允许群主、管理员和本人看到
			if isOwnerOrAdmin || userID == changedUserID {
				filteredMsgs = append(filteredMsgs, msg)
				log.ZDebug(ctx, "filterMuteNotificationMsgs: GroupMemberSetToAdmin/OrdinaryUserNotification allowed", "userID", userID, "changedUserID", changedUserID, "isOwnerOrAdmin", isOwnerOrAdmin, "contentType", msg.ContentType)
			} else {
				log.ZDebug(ctx, "filterMuteNotificationMsgs: GroupMemberSetToAdmin/OrdinaryUserNotification filtered", "userID", userID, "changedUserID", changedUserID, "isOwnerOrAdmin", isOwnerOrAdmin, "contentType", msg.ContentType)
			}
		} else {
			// 其他消息直接通过
			filteredMsgs = append(filteredMsgs, msg)
		}
	}

	return filteredMsgs
}

// unmarshalNotificationContent 解析通知消息内容
func unmarshalNotificationContent(content string, v interface{}) error {
	var notificationElem sdkws.NotificationElem
	if err := json.Unmarshal([]byte(content), &notificationElem); err != nil {
		return err
	}
	return jsonutil.JsonUnmarshal([]byte(notificationElem.Detail), v)
}

// enrichRedPacketMessages 填充红包消息的领取信息和状态
func (m *msgServer) enrichRedPacketMessages(ctx context.Context, userID string, msgs []*sdkws.MsgData) []*sdkws.MsgData {
	if m.redPacketReceiveDB == nil || m.redPacketDB == nil {
		return msgs
	}

	for _, msg := range msgs {
		// 只处理自定义消息类型
		if msg.ContentType != constant.Custom {
			continue
		}

		// 解析自定义消息内容
		var customElem apistruct.CustomElem
		if err := json.Unmarshal(msg.Content, &customElem); err != nil {
			continue
		}

		// 检查是否为红包消息（通过description字段判断二级类型）
		if customElem.Description != "redpacket" {
			continue
		}

		// 解析红包消息内容（从data字段中解析）
		var redPacketElem apistruct.RedPacketElem
		if err := json.Unmarshal([]byte(customElem.Data), &redPacketElem); err != nil {
			log.ZWarn(ctx, "enrichRedPacketMessages: failed to unmarshal red packet data", err, "redPacketID", redPacketElem.RedPacketID)
			continue
		}

		// 查询红包记录
		redPacket, err := m.redPacketDB.Take(ctx, redPacketElem.RedPacketID)
		if err != nil {
			log.ZWarn(ctx, "enrichRedPacketMessages: failed to get red packet", err, "redPacketID", redPacketElem.RedPacketID)
			// 如果查询失败，保持原有状态，不填充信息
			continue
		}

		// 填充红包状态信息
		redPacketElem.Status = redPacket.Status

		// 判断是否已过期（检查过期时间和状态）
		now := time.Now()
		isExpired := redPacket.Status == model.RedPacketStatusExpired || (redPacket.ExpireTime.Before(now) && redPacket.Status == model.RedPacketStatusActive)
		redPacketElem.IsExpired = isExpired

		// 判断是否已领完
		isFinished := redPacket.Status == model.RedPacketStatusFinished || redPacket.RemainCount <= 0
		redPacketElem.IsFinished = isFinished

		// 如果已过期，更新状态
		if isExpired && redPacket.Status == model.RedPacketStatusActive {
			redPacket.Status = model.RedPacketStatusExpired
			redPacketElem.Status = model.RedPacketStatusExpired
		}

		// 查询用户是否已领取
		receive, err := m.redPacketReceiveDB.FindByUserAndRedPacketID(ctx, userID, redPacketElem.RedPacketID)
		if err != nil {
			// 如果查询失败或未找到记录，说明未领取
			redPacketElem.IsReceived = false
			redPacketElem.ReceiveInfo = nil
		} else {
			// 已领取，填充领取信息（包括金额）
			redPacketElem.IsReceived = true
			redPacketElem.ReceiveInfo = &apistruct.RedPacketReceiveInfo{
				Amount:      receive.Amount,
				ReceiveTime: receive.ReceiveTime.UnixMilli(),
				IsLucky:     false, // 已去掉手气最佳功能，始终返回 false
			}
		}

		// 更新自定义消息的data字段（包含领取信息和状态）
		redPacketData := jsonutil.StructToJsonString(redPacketElem)
		customElem.Data = redPacketData

		// 重新序列化并更新消息内容
		newContent, err := json.Marshal(customElem)
		if err != nil {
			log.ZWarn(ctx, "enrichRedPacketMessages: failed to marshal custom elem", err, "redPacketID", redPacketElem.RedPacketID)
			continue
		}
		msg.Content = newContent
	}

	return msgs
}

func (m *msgServer) GetMaxSeq(ctx context.Context, req *sdkws.GetMaxSeqReq) (*sdkws.GetMaxSeqResp, error) {
	if err := authverify.CheckAccess(ctx, req.UserID); err != nil {
		return nil, err
	}
	conversationIDs, err := m.ConversationLocalCache.GetConversationIDs(ctx, req.UserID)
	if err != nil {
		return nil, err
	}
	for _, conversationID := range conversationIDs {
		conversationIDs = append(conversationIDs, conversationutil.GetNotificationConversationIDByConversationID(conversationID))
	}
	conversationIDs = append(conversationIDs, conversationutil.GetSelfNotificationConversationID(req.UserID))
	log.ZDebug(ctx, "GetMaxSeq", "conversationIDs", conversationIDs)
	maxSeqs, err := m.MsgDatabase.GetMaxSeqs(ctx, conversationIDs)
	if err != nil {
		log.ZWarn(ctx, "GetMaxSeqs error", err, "conversationIDs", conversationIDs, "maxSeqs", maxSeqs)
		return nil, err
	}
	// avoid pulling messages from sessions with a large number of max seq values of 0
	for conversationID, seq := range maxSeqs {
		if seq == 0 {
			delete(maxSeqs, conversationID)
		}
	}
	resp := new(sdkws.GetMaxSeqResp)
	resp.MaxSeqs = maxSeqs
	return resp, nil
}

func (m *msgServer) SearchMessage(ctx context.Context, req *msg.SearchMessageReq) (resp *msg.SearchMessageResp, err error) {
	// var chatLogs []*sdkws.MsgData
	var chatLogs []*msg.SearchedMsgData
	var total int64
	resp = &msg.SearchMessageResp{}
	if total, chatLogs, err = m.MsgDatabase.SearchMessage(ctx, req); err != nil {
		return nil, err
	}

	var (
		sendIDs      []string
		recvIDs      []string
		groupIDs     []string
		sendNameMap  = make(map[string]string)
		sendFaceMap  = make(map[string]string)
		recvMap      = make(map[string]string)
		groupMap     = make(map[string]*sdkws.GroupInfo)
		seenSendIDs  = make(map[string]struct{})
		seenRecvIDs  = make(map[string]struct{})
		seenGroupIDs = make(map[string]struct{})
	)

	for _, chatLog := range chatLogs {
		if chatLog.MsgData.SenderNickname == "" || chatLog.MsgData.SenderFaceURL == "" {
			if _, ok := seenSendIDs[chatLog.MsgData.SendID]; !ok {
				seenSendIDs[chatLog.MsgData.SendID] = struct{}{}
				sendIDs = append(sendIDs, chatLog.MsgData.SendID)
			}
		}
		switch chatLog.MsgData.SessionType {
		case constant.SingleChatType, constant.NotificationChatType:
			if _, ok := seenRecvIDs[chatLog.MsgData.RecvID]; !ok {
				seenRecvIDs[chatLog.MsgData.RecvID] = struct{}{}
				recvIDs = append(recvIDs, chatLog.MsgData.RecvID)
			}
		case constant.WriteGroupChatType, constant.ReadGroupChatType:
			if _, ok := seenGroupIDs[chatLog.MsgData.GroupID]; !ok {
				seenGroupIDs[chatLog.MsgData.GroupID] = struct{}{}
				groupIDs = append(groupIDs, chatLog.MsgData.GroupID)
			}
		}
	}

	// Retrieve sender and receiver information
	if len(sendIDs) != 0 {
		sendInfos, err := m.UserLocalCache.GetUsersInfo(ctx, sendIDs)
		if err != nil {
			return nil, err
		}
		for _, sendInfo := range sendInfos {
			sendNameMap[sendInfo.UserID] = sendInfo.Nickname
			sendFaceMap[sendInfo.UserID] = sendInfo.FaceURL
		}
	}

	if len(recvIDs) != 0 {
		recvInfos, err := m.UserLocalCache.GetUsersInfo(ctx, recvIDs)
		if err != nil {
			return nil, err
		}
		for _, recvInfo := range recvInfos {
			recvMap[recvInfo.UserID] = recvInfo.Nickname
		}
	}

	// Retrieve group information including member counts
	if len(groupIDs) != 0 {
		groupInfos, err := m.GroupLocalCache.GetGroupInfos(ctx, groupIDs)
		if err != nil {
			return nil, err
		}
		for _, groupInfo := range groupInfos {
			groupMap[groupInfo.GroupID] = groupInfo
			// Get actual member count
			memberIDs, err := m.GroupLocalCache.GetGroupMemberIDs(ctx, groupInfo.GroupID)
			if err == nil {
				groupInfo.MemberCount = uint32(len(memberIDs)) // Update the member count with actual number
			}
		}
	}

	// Construct response with updated information
	for _, chatLog := range chatLogs {
		pbchatLog := &msg.ChatLog{}
		datautil.CopyStructFields(pbchatLog, chatLog.MsgData)
		pbchatLog.SendTime = chatLog.MsgData.SendTime
		pbchatLog.CreateTime = chatLog.MsgData.CreateTime
		if chatLog.MsgData.SenderNickname == "" {
			pbchatLog.SenderNickname = sendNameMap[chatLog.MsgData.SendID]
		}
		if chatLog.MsgData.SenderFaceURL == "" {
			pbchatLog.SenderFaceURL = sendFaceMap[chatLog.MsgData.SendID]
		}
		switch chatLog.MsgData.SessionType {
		case constant.SingleChatType, constant.NotificationChatType:
			pbchatLog.RecvNickname = recvMap[chatLog.MsgData.RecvID]
		case constant.ReadGroupChatType:
			groupInfo := groupMap[chatLog.MsgData.GroupID]
			pbchatLog.GroupMemberCount = groupInfo.MemberCount // Reflects actual member count
			pbchatLog.RecvID = groupInfo.GroupID
			pbchatLog.GroupName = groupInfo.GroupName
			pbchatLog.GroupOwner = groupInfo.OwnerUserID
			pbchatLog.GroupType = groupInfo.GroupType
		}
		searchChatLog := &msg.SearchChatLog{ChatLog: pbchatLog, IsRevoked: chatLog.IsRevoked}

		resp.ChatLogs = append(resp.ChatLogs, searchChatLog)
	}
	resp.ChatLogsNum = int32(total)
	return resp, nil
}

func (m *msgServer) GetServerTime(ctx context.Context, _ *msg.GetServerTimeReq) (*msg.GetServerTimeResp, error) {
	return &msg.GetServerTimeResp{ServerTime: timeutil.GetCurrentTimestampByMill()}, nil
}

func (m *msgServer) GetLastMessage(ctx context.Context, req *msg.GetLastMessageReq) (*msg.GetLastMessageResp, error) {
	msgs, err := m.MsgDatabase.GetLastMessage(ctx, req.ConversationIDs, req.UserID)
	if err != nil {
		return nil, err
	}
	return &msg.GetLastMessageResp{Msgs: msgs}, nil
}