// 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 conversation

import (
	"context"

	"google.golang.org/grpc"

	"github.com/OpenIMSDK/protocol/constant"
	pbconversation "github.com/OpenIMSDK/protocol/conversation"
	"github.com/OpenIMSDK/tools/discoveryregistry"
	"github.com/OpenIMSDK/tools/errs"
	"github.com/OpenIMSDK/tools/log"
	"github.com/OpenIMSDK/tools/tx"
	"github.com/OpenIMSDK/tools/utils"

	"github.com/openimsdk/open-im-server/v3/pkg/common/convert"
	"github.com/openimsdk/open-im-server/v3/pkg/common/db/cache"
	"github.com/openimsdk/open-im-server/v3/pkg/common/db/controller"
	"github.com/openimsdk/open-im-server/v3/pkg/common/db/relation"
	tablerelation "github.com/openimsdk/open-im-server/v3/pkg/common/db/table/relation"
	"github.com/openimsdk/open-im-server/v3/pkg/rpcclient"
	"github.com/openimsdk/open-im-server/v3/pkg/rpcclient/notification"
)

type conversationServer struct {
	groupRpcClient                 *rpcclient.GroupRpcClient
	conversationDatabase           controller.ConversationDatabase
	conversationNotificationSender *notification.ConversationNotificationSender
}

func Start(client discoveryregistry.SvcDiscoveryRegistry, server *grpc.Server) error {
	db, err := relation.NewGormDB()
	if err != nil {
		return err
	}
	if err := db.AutoMigrate(&tablerelation.ConversationModel{}); err != nil {
		return err
	}
	rdb, err := cache.NewRedis()
	if err != nil {
		return err
	}
	conversationDB := relation.NewConversationGorm(db)
	groupRpcClient := rpcclient.NewGroupRpcClient(client)
	msgRpcClient := rpcclient.NewMessageRpcClient(client)
	pbconversation.RegisterConversationServer(server, &conversationServer{
		conversationNotificationSender: notification.NewConversationNotificationSender(&msgRpcClient),
		groupRpcClient:                 &groupRpcClient,
		conversationDatabase:           controller.NewConversationDatabase(conversationDB, cache.NewConversationRedis(rdb, cache.GetDefaultOpt(), conversationDB), tx.NewGorm(db)),
	})
	return nil
}

func (c *conversationServer) GetConversation(ctx context.Context, req *pbconversation.GetConversationReq) (*pbconversation.GetConversationResp, error) {
	conversations, err := c.conversationDatabase.FindConversations(ctx, req.OwnerUserID, []string{req.ConversationID})
	if err != nil {
		return nil, err
	}
	if len(conversations) < 1 {
		return nil, errs.ErrRecordNotFound.Wrap("conversation not found")
	}
	resp := &pbconversation.GetConversationResp{Conversation: &pbconversation.Conversation{}}
	resp.Conversation = convert.ConversationDB2Pb(conversations[0])
	return resp, nil
}

func (c *conversationServer) GetAllConversations(ctx context.Context, req *pbconversation.GetAllConversationsReq) (*pbconversation.GetAllConversationsResp, error) {
	conversations, err := c.conversationDatabase.GetUserAllConversation(ctx, req.OwnerUserID)
	if err != nil {
		return nil, err
	}
	resp := &pbconversation.GetAllConversationsResp{Conversations: []*pbconversation.Conversation{}}
	resp.Conversations = convert.ConversationsDB2Pb(conversations)
	return resp, nil
}

func (c *conversationServer) GetConversations(ctx context.Context, req *pbconversation.GetConversationsReq) (*pbconversation.GetConversationsResp, error) {
	conversations, err := c.conversationDatabase.FindConversations(ctx, req.OwnerUserID, req.ConversationIDs)
	if err != nil {
		return nil, err
	}
	resp := &pbconversation.GetConversationsResp{Conversations: []*pbconversation.Conversation{}}
	resp.Conversations = convert.ConversationsDB2Pb(conversations)
	return resp, nil
}

func (c *conversationServer) SetConversation(ctx context.Context, req *pbconversation.SetConversationReq) (*pbconversation.SetConversationResp, error) {
	var conversation tablerelation.ConversationModel
	if err := utils.CopyStructFields(&conversation, req.Conversation); err != nil {
		return nil, err
	}
	err := c.conversationDatabase.SetUserConversations(ctx, req.Conversation.OwnerUserID, []*tablerelation.ConversationModel{&conversation})
	if err != nil {
		return nil, err
	}
	_ = c.conversationNotificationSender.ConversationChangeNotification(ctx, req.Conversation.OwnerUserID, []string{req.Conversation.ConversationID})
	resp := &pbconversation.SetConversationResp{}
	return resp, nil
}

//nolint
func (c *conversationServer) SetConversations(ctx context.Context,
	req *pbconversation.SetConversationsReq,
) (*pbconversation.SetConversationsResp, error) {
	if req.Conversation == nil {
		return nil, errs.ErrArgs.Wrap("conversation must not be nil")
	}
	if req.Conversation.ConversationType == constant.GroupChatType {
		groupInfo, err := c.groupRpcClient.GetGroupInfo(ctx, req.Conversation.GroupID)
		if err != nil {
			return nil, err
		}
		if groupInfo.Status == constant.GroupStatusDismissed {
			return nil, errs.ErrDismissedAlready.Wrap("group dismissed")
		}
	}
	var unequal int
	var conv tablerelation.ConversationModel
	if len(req.UserIDs) == 1 {
		cs, err := c.conversationDatabase.FindConversations(ctx, req.UserIDs[0], []string{req.Conversation.ConversationID})
		if err != nil {
			return nil, err
		}
		if len(cs) == 0 {
			return nil, errs.ErrRecordNotFound.Wrap("conversation not found")
		}
		conv = *cs[0]
	}
	var conversation tablerelation.ConversationModel
	conversation.ConversationID = req.Conversation.ConversationID
	conversation.ConversationType = req.Conversation.ConversationType
	conversation.UserID = req.Conversation.UserID
	conversation.GroupID = req.Conversation.GroupID
	m := make(map[string]interface{})
	if req.Conversation.RecvMsgOpt != nil {
		m["recv_msg_opt"] = req.Conversation.RecvMsgOpt.Value
		if req.Conversation.RecvMsgOpt.Value != conv.RecvMsgOpt {
			unequal++
		}
	}
	if req.Conversation.AttachedInfo != nil {
		m["attached_info"] = req.Conversation.AttachedInfo.Value
		if req.Conversation.AttachedInfo.Value != conv.AttachedInfo {
			unequal++
		}
	}
	if req.Conversation.Ex != nil {
		m["ex"] = req.Conversation.Ex.Value
		if req.Conversation.Ex.Value != conv.Ex {
			unequal++
		}
	}
	if req.Conversation.IsPinned != nil {
		m["is_pinned"] = req.Conversation.IsPinned.Value
		if req.Conversation.IsPinned.Value != conv.IsPinned {
			unequal++
		}
	}
	if req.Conversation.GroupAtType != nil {
		m["group_at_type"] = req.Conversation.GroupAtType.Value
		if req.Conversation.GroupAtType.Value != conv.GroupAtType {
			unequal++
		}
	}
	if req.Conversation.MsgDestructTime != nil {
		m["msg_destruct_time"] = req.Conversation.MsgDestructTime.Value
		if req.Conversation.MsgDestructTime.Value != conv.MsgDestructTime {
			unequal++
		}
	}
	if req.Conversation.IsMsgDestruct != nil {
		m["is_msg_destruct"] = req.Conversation.IsMsgDestruct.Value
		if req.Conversation.IsMsgDestruct.Value != conv.IsMsgDestruct {
			unequal++
		}
	}
	if req.Conversation.IsPrivateChat != nil && req.Conversation.ConversationType != constant.SuperGroupChatType {
		var conversations []*tablerelation.ConversationModel
		for _, ownerUserID := range req.UserIDs {
			conversation2 := conversation
			conversation2.OwnerUserID = ownerUserID
			conversation2.IsPrivateChat = req.Conversation.IsPrivateChat.Value
			conversations = append(conversations, &conversation2)
		}
		if err := c.conversationDatabase.SyncPeerUserPrivateConversationTx(ctx, conversations); err != nil {
			return nil, err
		}
		for _, userID := range req.UserIDs {
			err := c.conversationNotificationSender.ConversationSetPrivateNotification(ctx, userID, req.Conversation.UserID,
				req.Conversation.IsPrivateChat.Value, req.Conversation.ConversationID)
			if err != nil {
				log.ZWarn(ctx, "send conversation set private notification failed", err,
					"userID", userID, "conversationID", req.Conversation.ConversationID)

				continue
			}
		}
	}
	if req.Conversation.BurnDuration != nil {
		m["burn_duration"] = req.Conversation.BurnDuration.Value
		if req.Conversation.BurnDuration.Value != conv.BurnDuration {
			unequal++
		}
	}
	if err := c.conversationDatabase.SetUsersConversationFiledTx(ctx, req.UserIDs, &conversation, m); err != nil {
		return nil, err
	}
	if unequal > 0 {
		for _, v := range req.UserIDs {
			c.conversationNotificationSender.ConversationChangeNotification(ctx, v, []string{req.Conversation.ConversationID})
		}
	}
	return &pbconversation.SetConversationsResp{}, nil
}

// 获取超级大群开启免打扰的用户ID.
func (c *conversationServer) GetRecvMsgNotNotifyUserIDs(ctx context.Context, req *pbconversation.GetRecvMsgNotNotifyUserIDsReq) (*pbconversation.GetRecvMsgNotNotifyUserIDsResp, error) {
	userIDs, err := c.conversationDatabase.FindRecvMsgNotNotifyUserIDs(ctx, req.GroupID)
	if err != nil {
		return nil, err
	}
	return &pbconversation.GetRecvMsgNotNotifyUserIDsResp{UserIDs: userIDs}, nil
}

// create conversation without notification for msg redis transfer.
func (c *conversationServer) CreateSingleChatConversations(ctx context.Context,
	req *pbconversation.CreateSingleChatConversationsReq,
) (*pbconversation.CreateSingleChatConversationsResp, error) {
	switch req.ConversationType {
	case constant.SingleChatType:
		var conversation tablerelation.ConversationModel
		conversation.ConversationID = req.ConversationID
		conversation.ConversationType = req.ConversationType
		conversation.OwnerUserID = req.SendID
		conversation.UserID = req.RecvID
		err := c.conversationDatabase.CreateConversation(ctx, []*tablerelation.ConversationModel{&conversation})
		if err != nil {
			log.ZWarn(ctx, "create conversation failed", err, "conversation", conversation)
		}

		conversation2 := conversation
		conversation2.OwnerUserID = req.RecvID
		conversation2.UserID = req.SendID
		err = c.conversationDatabase.CreateConversation(ctx, []*tablerelation.ConversationModel{&conversation2})
		if err != nil {
			log.ZWarn(ctx, "create conversation failed", err, "conversation2", conversation)
		}
	case constant.NotificationChatType:
		var conversation tablerelation.ConversationModel
		conversation.ConversationID = req.ConversationID
		conversation.ConversationType = req.ConversationType
		conversation.OwnerUserID = req.RecvID
		conversation.UserID = req.SendID
		err := c.conversationDatabase.CreateConversation(ctx, []*tablerelation.ConversationModel{&conversation})
		if err != nil {
			log.ZWarn(ctx, "create conversation failed", err, "conversation2", conversation)
		}
	}

	return &pbconversation.CreateSingleChatConversationsResp{}, nil
}

func (c *conversationServer) CreateGroupChatConversations(ctx context.Context, req *pbconversation.CreateGroupChatConversationsReq) (*pbconversation.CreateGroupChatConversationsResp, error) {
	err := c.conversationDatabase.CreateGroupChatConversation(ctx, req.GroupID, req.UserIDs)
	if err != nil {
		return nil, err
	}
	return &pbconversation.CreateGroupChatConversationsResp{}, nil
}

func (c *conversationServer) SetConversationMaxSeq(ctx context.Context, req *pbconversation.SetConversationMaxSeqReq) (*pbconversation.SetConversationMaxSeqResp, error) {
	if err := c.conversationDatabase.UpdateUsersConversationFiled(ctx, req.OwnerUserID, req.ConversationID,
		map[string]interface{}{"max_seq": req.MaxSeq}); err != nil {
		return nil, err
	}
	return &pbconversation.SetConversationMaxSeqResp{}, nil
}

func (c *conversationServer) GetConversationIDs(ctx context.Context, req *pbconversation.GetConversationIDsReq) (*pbconversation.GetConversationIDsResp, error) {
	conversationIDs, err := c.conversationDatabase.GetConversationIDs(ctx, req.UserID)
	if err != nil {
		return nil, err
	}
	return &pbconversation.GetConversationIDsResp{ConversationIDs: conversationIDs}, nil
}

func (c *conversationServer) GetUserConversationIDsHash(ctx context.Context, req *pbconversation.GetUserConversationIDsHashReq) (*pbconversation.GetUserConversationIDsHashResp, error) {
	hash, err := c.conversationDatabase.GetUserConversationIDsHash(ctx, req.OwnerUserID)
	if err != nil {
		return nil, err
	}
	return &pbconversation.GetUserConversationIDsHashResp{Hash: hash}, nil
}

func (c *conversationServer) GetConversationsByConversationID(
	ctx context.Context,
	req *pbconversation.GetConversationsByConversationIDReq,
) (*pbconversation.GetConversationsByConversationIDResp, error) {
	conversations, err := c.conversationDatabase.GetConversationsByConversationID(ctx, req.ConversationIDs)
	if err != nil {
		return nil, err
	}
	return &pbconversation.GetConversationsByConversationIDResp{Conversations: convert.ConversationsDB2Pb(conversations)}, nil
}

func (c *conversationServer) GetConversationOfflinePushUserIDs(
	ctx context.Context,
	req *pbconversation.GetConversationOfflinePushUserIDsReq,
) (*pbconversation.GetConversationOfflinePushUserIDsResp, error) {
	if req.ConversationID == "" {
		return nil, errs.ErrArgs.Wrap("conversationID is empty")
	}
	if len(req.UserIDs) == 0 {
		return &pbconversation.GetConversationOfflinePushUserIDsResp{}, nil
	}
	userIDs, err := c.conversationDatabase.GetConversationNotReceiveMessageUserIDs(ctx, req.ConversationID)
	if err != nil {
		return nil, err
	}
	if len(userIDs) == 0 {
		return &pbconversation.GetConversationOfflinePushUserIDsResp{UserIDs: req.UserIDs}, nil
	}
	userIDSet := make(map[string]struct{})
	for _, userID := range req.UserIDs {
		userIDSet[userID] = struct{}{}
	}
	for _, userID := range userIDs {
		delete(userIDSet, userID)
	}
	return &pbconversation.GetConversationOfflinePushUserIDsResp{UserIDs: utils.Keys(userIDSet)}, nil
}