package convert

import (
	"context"

	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/db/table/relation"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/proto/sdkws"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/utils"
)

func FriendPb2DB(friend *sdkws.FriendInfo) *relation.FriendModel {
	dbFriend := &relation.FriendModel{}
	utils.CopyStructFields(dbFriend, friend)
	dbFriend.FriendUserID = friend.FriendUser.UserID
	dbFriend.CreateTime = utils.UnixSecondToTime(friend.CreateTime)
	return dbFriend
}

func FriendDB2Pb(ctx context.Context, friendDB *relation.FriendModel, getUsers func(ctx context.Context, userIDs []string) (map[string]*sdkws.UserInfo, error)) (*sdkws.FriendInfo, error) {
	pbfriend := &sdkws.FriendInfo{FriendUser: &sdkws.UserInfo{}}
	utils.CopyStructFields(pbfriend, friendDB)
	users, err := getUsers(ctx, []string{friendDB.FriendUserID})
	if err != nil {
		return nil, err
	}
	pbfriend.FriendUser.UserID = users[friendDB.FriendUserID].UserID
	pbfriend.FriendUser.Nickname = users[friendDB.FriendUserID].Nickname
	pbfriend.FriendUser.FaceURL = users[friendDB.FriendUserID].FaceURL
	pbfriend.FriendUser.Ex = users[friendDB.FriendUserID].Ex
	pbfriend.CreateTime = friendDB.CreateTime.Unix()
	return pbfriend, nil
}

func FriendsDB2Pb(ctx context.Context, friendsDB []*relation.FriendModel, getUsers func(ctx context.Context, userIDs []string) (map[string]*sdkws.UserInfo, error)) (friendsPb []*sdkws.FriendInfo, err error) {
	var userID []string
	for _, friendDB := range friendsDB {
		userID = append(userID, friendDB.FriendUserID)
	}
	users, err := getUsers(ctx, userID)
	if err != nil {
		return nil, err
	}
	for _, friend := range friendsDB {
		friendPb := &sdkws.FriendInfo{FriendUser: &sdkws.UserInfo{}}
		utils.CopyStructFields(friendPb, friend)
		friendPb.FriendUser.UserID = users[friend.FriendUserID].UserID
		friendPb.FriendUser.Nickname = users[friend.FriendUserID].Nickname
		friendPb.FriendUser.FaceURL = users[friend.FriendUserID].FaceURL
		friendPb.FriendUser.Ex = users[friend.FriendUserID].Ex
		friendPb.CreateTime = friend.CreateTime.Unix()
		friendsPb = append(friendsPb, friendPb)
	}
	return friendsPb, nil
}

func FriendRequestDB2Pb(ctx context.Context, friendRequests []*relation.FriendRequestModel, getUsers func(ctx context.Context, userIDs []string) (map[string]*sdkws.UserInfo, error)) (PBFriendRequests []*sdkws.FriendRequest, err error) {
	userIDMap := make(map[string]struct{})
	for _, friendRequest := range friendRequests {
		userIDMap[friendRequest.ToUserID] = struct{}{}
		userIDMap[friendRequest.FromUserID] = struct{}{}
	}
	users, err := getUsers(ctx, utils.Keys(userIDMap))
	if err != nil {
		return nil, err
	}
	for _, friendRequest := range friendRequests {
		friendRequestPb := &sdkws.FriendRequest{}
		utils.CopyStructFields(friendRequestPb, friendRequest)
		friendRequestPb.FromFaceURL = users[friendRequest.FromUserID].FaceURL
		friendRequestPb.FromNickname = users[friendRequest.FromUserID].Nickname
		friendRequestPb.ToFaceURL = users[friendRequest.ToUserID].FaceURL
		friendRequestPb.ToNickname = users[friendRequest.ToUserID].Nickname
	}
	return PBFriendRequests, nil
}