// 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"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/authverify"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/msgprocessor"

	"github.com/OpenIMSDK/protocol/constant"
	"github.com/OpenIMSDK/protocol/msg"

	"github.com/OpenIMSDK/protocol/sdkws"
	"github.com/OpenIMSDK/tools/log"
	"github.com/OpenIMSDK/tools/utils"
)

func (m *msgServer) PullMessageBySeqs(
	ctx context.Context,
	req *sdkws.PullMessageBySeqsReq,
) (*sdkws.PullMessageBySeqsResp, error) {
	resp := &sdkws.PullMessageBySeqsResp{}
	resp.Msgs = make(map[string]*sdkws.PullMsgs)
	resp.NotificationMsgs = make(map[string]*sdkws.PullMsgs)
	for _, seq := range req.SeqRanges {
		if !msgprocessor.IsNotification(seq.ConversationID) {
			conversation, err := m.Conversation.GetConversation(ctx, req.UserID, seq.ConversationID)
			if err != nil {
				log.ZError(ctx, "GetConversation error", err, "conversationID", seq.ConversationID)
				continue
			}
			minSeq, maxSeq, msgs, err := m.MsgDatabase.GetMsgBySeqsRange(
				ctx,
				req.UserID,
				seq.ConversationID,
				seq.Begin,
				seq.End,
				seq.Num,
				conversation.MaxSeq,
			)
			if err != nil {
				log.ZWarn(ctx, "GetMsgBySeqsRange error", err, "conversationID", seq.ConversationID, "seq", seq)
				continue
			}
			var isEnd bool
			switch req.Order {
			case sdkws.PullOrder_PullOrderAsc:
				isEnd = maxSeq <= seq.End
			case sdkws.PullOrder_PullOrderDesc:
				isEnd = seq.Begin <= minSeq
			}
			resp.Msgs[seq.ConversationID] = &sdkws.PullMsgs{Msgs: msgs, IsEnd: isEnd}
		} else {
			var seqs []int64
			for i := seq.Begin; i <= seq.End; i++ {
				seqs = append(seqs, i)
			}
			minSeq, maxSeq, notificationMsgs, err := m.MsgDatabase.GetMsgBySeqs(ctx, req.UserID, seq.ConversationID, seqs)
			if err != nil {
				log.ZWarn(ctx, "GetMsgBySeqs error", err, "conversationID", seq.ConversationID, "seq", seq)
				continue
			}
			var isEnd bool
			switch req.Order {
			case sdkws.PullOrder_PullOrderAsc:
				isEnd = maxSeq <= seq.End
			case sdkws.PullOrder_PullOrderDesc:
				isEnd = seq.Begin <= minSeq
			}
			resp.NotificationMsgs[seq.ConversationID] = &sdkws.PullMsgs{Msgs: notificationMsgs, IsEnd: isEnd}
		}
	}
	return resp, nil
}

func (m *msgServer) GetMaxSeq(ctx context.Context, req *sdkws.GetMaxSeqReq) (*sdkws.GetMaxSeqResp, error) {
	if err := authverify.CheckAccessV3(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, utils.GetNotificationConversationIDByConversationID(conversationID))
	}
	conversationIDs = append(conversationIDs, utils.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
	}
	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 total int32
	resp = &msg.SearchMessageResp{}
	if total, chatLogs, err = m.MsgDatabase.SearchMessage(ctx, req); err != nil {
		return nil, err
	}
	for _, chatLog := range chatLogs {
		pbChatLog := &msg.ChatLog{}
		utils.CopyStructFields(pbChatLog, chatLog)
		pbChatLog.SendTime = chatLog.SendTime
		pbChatLog.CreateTime = chatLog.CreateTime
		if chatLog.SenderNickname == "" {
			sendUser, err := m.User.GetUserInfo(ctx, chatLog.SendID)
			if err != nil {
				return nil, err
			}
			pbChatLog.SenderNickname = sendUser.Nickname
		}
		switch chatLog.SessionType {
		case constant.SingleChatType:
			recvUser, err := m.User.GetUserInfo(ctx, chatLog.RecvID)
			if err != nil {
				return nil, err
			}
			pbChatLog.RecvNickname = recvUser.Nickname

		case constant.GroupChatType, constant.SuperGroupChatType:
			group, err := m.Group.GetGroupInfo(ctx, chatLog.GroupID)
			if err != nil {
				return nil, err
			}
			pbChatLog.SenderFaceURL = group.FaceURL
			pbChatLog.GroupMemberCount = group.MemberCount
			pbChatLog.RecvID = group.GroupID
			pbChatLog.GroupName = group.GroupName
			pbChatLog.GroupOwner = group.OwnerUserID
			pbChatLog.GroupType = group.GroupType
		}
		resp.ChatLogs = append(resp.ChatLogs, pbChatLog)
	}

	resp.ChatLogsNum = total
	return resp, nil
}