package notification

import (
	"context"
	"encoding/json"

	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/constant"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/convert"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/db/controller"
	relationTb "github.com/OpenIMSDK/Open-IM-Server/pkg/common/db/table/relation"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/discoveryregistry"
	pbFriend "github.com/OpenIMSDK/Open-IM-Server/pkg/proto/friend"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/proto/sdkws"
	"github.com/OpenIMSDK/Open-IM-Server/pkg/rpcclient"

	"github.com/golang/protobuf/proto"
)

type FriendNotificationSender struct {
	*rpcclient.MsgClient
	// 找不到报错
	getUsersInfo func(ctx context.Context, userIDs []string) ([]rpcclient.CommonUser, error)
	// db controller
	db controller.FriendDatabase
}

type friendNotificationSenderOptions func(*FriendNotificationSender)

func WithFriendDB(db controller.FriendDatabase) friendNotificationSenderOptions {
	return func(s *FriendNotificationSender) {
		s.db = db
	}
}

func WithDBFunc(fn func(ctx context.Context, userIDs []string) (users []*relationTb.UserModel, err error)) friendNotificationSenderOptions {
	return func(s *FriendNotificationSender) {
		f := func(ctx context.Context, userIDs []string) (result []rpcclient.CommonUser, err error) {
			users, err := fn(ctx, userIDs)
			if err != nil {
				return nil, err
			}
			for _, user := range users {
				result = append(result, user)
			}
			return result, nil
		}
		s.getUsersInfo = f
	}
}

func WithRpcFunc(fn func(ctx context.Context, userIDs []string) ([]*sdkws.UserInfo, error)) friendNotificationSenderOptions {
	return func(s *FriendNotificationSender) {
		f := func(ctx context.Context, userIDs []string) (result []rpcclient.CommonUser, err error) {
			users, err := fn(ctx, userIDs)
			if err != nil {
				return nil, err
			}
			for _, user := range users {
				result = append(result, user)
			}
			return result, err
		}
		s.getUsersInfo = f
	}
}

func NewFriendNotificationSender(client discoveryregistry.SvcDiscoveryRegistry, opts ...friendNotificationSenderOptions) *FriendNotificationSender {
	f := &FriendNotificationSender{
		MsgClient: rpcclient.NewMsgClient(client),
	}
	for _, opt := range opts {
		opt(f)
	}
	return f
}

func (c *FriendNotificationSender) getUsersInfoMap(ctx context.Context, userIDs []string) (map[string]*sdkws.UserInfo, error) {
	users, err := c.getUsersInfo(ctx, userIDs)
	if err != nil {
		return nil, err
	}
	result := make(map[string]*sdkws.UserInfo)
	for _, user := range users {
		result[user.GetUserID()] = user.(*sdkws.UserInfo)
	}
	return result, nil
}

func (c *FriendNotificationSender) getFromToUserNickname(ctx context.Context, fromUserID, toUserID string) (string, string, error) {
	users, err := c.getUsersInfoMap(ctx, []string{fromUserID, toUserID})
	if err != nil {
		return "", "", nil
	}
	return users[fromUserID].Nickname, users[toUserID].Nickname, nil
}

func (c *FriendNotificationSender) friendNotification(ctx context.Context, fromUserID, toUserID string, contentType int32, m proto.Message) {
	var err error
	var n rpcclient.NotificationMsg
	n.SendID = fromUserID
	n.RecvID = toUserID
	n.ContentType = contentType
	n.SessionType = constant.SingleChatType
	n.MsgFrom = constant.SysMsgType
	n.Content, err = json.Marshal(m)
	if err != nil {
		return
	}
	c.Notification(ctx, &n)
}

func (u *FriendNotificationSender) UserInfoUpdatedNotification(ctx context.Context, opUserID string, changedUserID string) {
	tips := sdkws.UserInfoUpdatedTips{UserID: changedUserID}
	u.friendNotification(ctx, opUserID, changedUserID, constant.UserInfoUpdatedNotification, &tips)
}

func (c *FriendNotificationSender) FriendApplicationAddNotification(ctx context.Context, req *pbFriend.ApplyToAddFriendReq) {
	FriendApplicationTips := sdkws.FriendApplicationTips{FromToUserID: &sdkws.FromToUserID{}}
	FriendApplicationTips.FromToUserID.FromUserID = req.FromUserID
	FriendApplicationTips.FromToUserID.ToUserID = req.ToUserID
	c.friendNotification(ctx, req.FromUserID, req.ToUserID, constant.FriendApplicationNotification, &FriendApplicationTips)
}

func (c *FriendNotificationSender) FriendApplicationAgreedNotification(ctx context.Context, req *pbFriend.RespondFriendApplyReq) {
	FriendApplicationApprovedTips := sdkws.FriendApplicationApprovedTips{FromToUserID: &sdkws.FromToUserID{}}
	FriendApplicationApprovedTips.FromToUserID.FromUserID = req.FromUserID
	FriendApplicationApprovedTips.FromToUserID.ToUserID = req.ToUserID
	FriendApplicationApprovedTips.HandleMsg = req.HandleMsg
	c.friendNotification(ctx, req.ToUserID, req.FromUserID, constant.FriendApplicationApprovedNotification, &FriendApplicationApprovedTips)
}

func (c *FriendNotificationSender) FriendApplicationRefusedNotification(ctx context.Context, req *pbFriend.RespondFriendApplyReq) {
	FriendApplicationApprovedTips := sdkws.FriendApplicationApprovedTips{FromToUserID: &sdkws.FromToUserID{}}
	FriendApplicationApprovedTips.FromToUserID.FromUserID = req.FromUserID
	FriendApplicationApprovedTips.FromToUserID.ToUserID = req.ToUserID
	FriendApplicationApprovedTips.HandleMsg = req.HandleMsg
	c.friendNotification(ctx, req.ToUserID, req.FromUserID, constant.FriendApplicationRejectedNotification, &FriendApplicationApprovedTips)
}

func (c *FriendNotificationSender) FriendAddedNotification(ctx context.Context, operationID, opUserID, fromUserID, toUserID string) {
	friendAddedTips := sdkws.FriendAddedTips{Friend: &sdkws.FriendInfo{}, OpUser: &sdkws.PublicUserInfo{}}
	user, err := c.getUsersInfo(ctx, []string{opUserID})
	if err != nil {
		return
	}
	friendAddedTips.OpUser.UserID = user[0].GetUserID()
	friendAddedTips.OpUser.Ex = user[0].GetEx()
	friendAddedTips.OpUser.Nickname = user[0].GetNickname()
	friendAddedTips.OpUser.FaceURL = user[0].GetFaceURL()
	friends, err := c.db.FindFriendsWithError(ctx, fromUserID, []string{toUserID})
	if err != nil {
		return
	}
	friendAddedTips.Friend, err = convert.FriendDB2Pb(ctx, friends[0], c.getUsersInfoMap)
	if err != nil {
		return
	}
	c.friendNotification(ctx, fromUserID, toUserID, constant.FriendAddedNotification, &friendAddedTips)
}

func (c *FriendNotificationSender) FriendDeletedNotification(ctx context.Context, req *pbFriend.DeleteFriendReq) {
	friendDeletedTips := sdkws.FriendDeletedTips{FromToUserID: &sdkws.FromToUserID{}}
	friendDeletedTips.FromToUserID.FromUserID = req.OwnerUserID
	friendDeletedTips.FromToUserID.ToUserID = req.FriendUserID
	c.friendNotification(ctx, req.OwnerUserID, req.FriendUserID, constant.FriendDeletedNotification, &friendDeletedTips)
}

func (c *FriendNotificationSender) FriendRemarkSetNotification(ctx context.Context, fromUserID, toUserID string) {
	friendInfoChangedTips := sdkws.FriendInfoChangedTips{FromToUserID: &sdkws.FromToUserID{}}
	friendInfoChangedTips.FromToUserID.FromUserID = fromUserID
	friendInfoChangedTips.FromToUserID.ToUserID = toUserID
	c.friendNotification(ctx, fromUserID, toUserID, constant.FriendRemarkSetNotification, &friendInfoChangedTips)
}

func (c *FriendNotificationSender) BlackAddedNotification(ctx context.Context, req *pbFriend.AddBlackReq) {
	blackAddedTips := sdkws.BlackAddedTips{FromToUserID: &sdkws.FromToUserID{}}
	blackAddedTips.FromToUserID.FromUserID = req.OwnerUserID
	blackAddedTips.FromToUserID.ToUserID = req.BlackUserID
	c.friendNotification(ctx, req.OwnerUserID, req.BlackUserID, constant.BlackAddedNotification, &blackAddedTips)
}

func (c *FriendNotificationSender) BlackDeletedNotification(ctx context.Context, req *pbFriend.RemoveBlackReq) {
	blackDeletedTips := sdkws.BlackDeletedTips{FromToUserID: &sdkws.FromToUserID{}}
	blackDeletedTips.FromToUserID.FromUserID = req.OwnerUserID
	blackDeletedTips.FromToUserID.ToUserID = req.BlackUserID
	c.friendNotification(ctx, req.OwnerUserID, req.BlackUserID, constant.BlackDeletedNotification, &blackDeletedTips)
}

func (c *FriendNotificationSender) FriendInfoUpdatedNotification(ctx context.Context, changedUserID string, needNotifiedUserID string, opUserID string) {
	selfInfoUpdatedTips := sdkws.UserInfoUpdatedTips{UserID: changedUserID}
	c.friendNotification(ctx, opUserID, needNotifiedUserID, constant.FriendInfoUpdatedNotification, &selfInfoUpdatedTips)
}