package app

import (
	"context"
	"database/sql"
	"errors"
	"gim/internal/logic/domain/group/model"
	"gim/internal/logic/domain/group/repo"
	"gim/pkg/db"
	"gim/pkg/pb"
)

type groupApp struct{}

var GroupApp = new(groupApp)

// CreateGroup 创建群组
func (*groupApp) CreateGroup(ctx context.Context, userId int64, in *pb.CreateGroupReq) (int64, error) {
	group := model.CreateGroup(userId, in)
	err := repo.GroupRepo.Save(group)
	if err != nil {
		return 0, err
	}
	return group.Id, nil
}

// GetGroup 获取群组信息
func (*groupApp) GetGroup(ctx context.Context, groupId int64) (*pb.Group, error) {
	group, err := repo.GroupRepo.Get(groupId)
	if err != nil {
		return nil, err
	}

	return group.ToProto(), nil
}

// GetUserGroups 获取用户加入的群组列表
func (*groupApp) GetUserGroups(ctx context.Context, userId int64) ([]*pb.Group, error) {
	groups, err := repo.GroupUserRepo.ListByUserId(userId)
	if err != nil {
		return nil, err
	}

	pbGroups := make([]*pb.Group, len(groups))
	for i := range groups {
		pbGroups[i] = groups[i].ToProto()
	}
	return pbGroups, nil
}

// Update 更新群组
func (*groupApp) Update(ctx context.Context, userId int64, update *pb.UpdateGroupReq) error {
	group, err := repo.GroupRepo.Get(update.GroupId)
	if err != nil {
		return err
	}
	var isUpdateIntroduction = false
	if group.Introduction != update.Introduction {
		isUpdateIntroduction = true
	}
	err = group.Update(ctx, update)
	if err != nil {
		return err
	}

	err = repo.GroupRepo.Save(group)
	if err != nil {
		return err
	}

	err = group.PushUpdate(ctx, userId, isUpdateIntroduction)
	if err != nil {
		return err
	}

	return nil
}

// AddMembers 添加群组成员
func (*groupApp) AddMembers(ctx context.Context, userId, groupId int64, userIds []int64) ([]int64, error) {
	group, err := repo.GroupRepo.Get(groupId)
	if err != nil {
		return nil, err
	}
	existIds, addedIds, err := group.AddMembers(ctx, userIds)
	if err != nil {
		return nil, err
	}
	err = repo.GroupRepo.Save(group)
	if err != nil {
		return nil, err
	}

	err = group.PushAddMember(ctx, userId, addedIds)
	if err != nil {
		return nil, err
	}
	return existIds, nil
}

// UpdateMember 更新群组用户
func (*groupApp) UpdateMember(ctx context.Context, in *pb.UpdateGroupMemberReq, optId int64) error {
	group, err := repo.GroupRepo.Get(in.GroupId)
	if err != nil {
		return err
	}
	err = group.UpdateMember(ctx, in)
	if err != nil {
		return err
	}
	err = repo.GroupRepo.Save(group)
	if err != nil {
		return err
	}

	err = group.PushUpdateMember(ctx, optId, in.UserId, int32(in.MemberType))
	if err != nil {
		return err
	}
	return nil
}

// DeleteMember 删除群组成员
func (*groupApp) DeleteMember(ctx context.Context, groupId int64, userId int64, optId int64) error {
	group, err := repo.GroupRepo.Get(groupId)
	if err != nil {
		return err
	}
	err = group.DeleteMember(ctx, userId)
	if err != nil {
		return err
	}
	err = repo.GroupRepo.Save(group)
	if err != nil {
		return err
	}

	err = group.PushDeleteMember(ctx, optId, userId)
	if err != nil {
		return err
	}
	return nil
}

// GetMembers 获取群组成员
func (*groupApp) GetMembers(ctx context.Context, groupId int64) ([]*pb.GroupMember, error) {
	group, err := repo.GroupRepo.Get(groupId)
	if err != nil {
		return nil, err
	}
	return group.GetMembers(ctx)
}

// SendMessage 发送群组消息
func (*groupApp) SendMessage(ctx context.Context, sender *pb.Sender, req *pb.SendMessageReq) (int64, error) {
	group, err := repo.GroupRepo.Get(req.ReceiverId)
	if err != nil {
		return 0, err
	}

	return group.SendMessage(ctx, sender, req)
}

// GetBannedMembers 获取群组禁言成员
func (*groupApp) GetBannedMembers(ctx context.Context, groupId int64) ([]*pb.GroupMember, error) {
	// 查询被禁言的成员列表
	group, err := repo.GroupRepo.GetForBanned(groupId)
	if err != nil {
		return nil, err
	}
	return group.GetMembers(ctx)
}

// SetGroupMemberBanned 设置禁言
func (*groupApp) SetGroupMemberBanned(ctx context.Context, optId, groupId int64, userIds []int64, isAllMemberBanned bool) ([]*pb.GroupMember, error) {
	groupUser, err := repo.GroupUserRepo.Get(groupId, optId)
	if err != nil {
		return nil, err
	}
	if groupUser == nil {
		return nil, errors.New("未查询到群组用户信息")
	}
	if groupUser.MemberType != int(pb.MemberType_GMT_ADMIN) && groupUser.MemberType != int(pb.MemberType_GMT_MANAGE) {
		return nil, errors.New("非管理员操作")
	}

	group, err := repo.GroupRepo.Get(groupId)
	if err != nil {
		return nil, err
	}
	if isAllMemberBanned {
		//设置全员禁言
		//1、更新 `group` 的 is_all_member_banned 状态
		group.IsAllMemberBanned = int32(pb.AllMemberBannedType_YES_All_Member_Banned)
		err := repo.GroupRepo.Save(group)
		if err != nil {
			return nil, err
		}

		//2、发送推送消息
		err = group.PushGroupMemberBanned(ctx, optId, 0, isAllMemberBanned)
		if err != nil {
			return nil, err
		}
	} else {
		//设置成员禁言
		//1、更新 `group` 的 is_all_member_banned 状态
		if group.IsAllMemberBanned != int32(pb.AllMemberBannedType_NOT_All_Member_Banned) {
			group.IsAllMemberBanned = int32(pb.AllMemberBannedType_NOT_All_Member_Banned)
			err := repo.GroupRepo.Save(group)
			if err != nil {
				return nil, err
			}
			//TODO::推送消息
			err = group.PushGroupMemberBanned(ctx, optId, -1, isAllMemberBanned)
			if err != nil {
				return nil, err
			}
		}

		//2、更新 `group_user` 的 status 状态
		if len(userIds) == 0 {
			db.DB.Model(model.GroupUser{}).Where("group_id = ?", groupId).Updates(model.GroupUserV2{Status: sql.NullInt32{Int32: int32(pb.GroupUserStatusType_GROUP_USER_STATUS_NORMAL), Valid: true}})
		} else {
			db.DB.Model(model.GroupUser{}).Where("user_id in (?) and group_id = ?", userIds, groupId).Updates(model.GroupUserV2{Status: sql.NullInt32{Int32: int32(pb.GroupUserStatusType_GROUP_USER_STATUS_Banned), Valid: true}})
			db.DB.Model(model.GroupUser{}).Where("(user_id) not in (?) and group_id = ?", userIds, groupId).Updates(model.GroupUserV2{Status: sql.NullInt32{Int32: int32(pb.GroupUserStatusType_GROUP_USER_STATUS_NORMAL), Valid: true}})
		}

		//3、发送推送消息
		for _, u := range userIds {
			err = group.PushGroupMemberBanned(ctx, optId, u, isAllMemberBanned)
			if err != nil {
				return nil, err
			}
		}
	}

	// 查询被禁言的成员列表
	group, err = repo.GroupRepo.GetForBanned(groupId)
	if err != nil {
		return nil, err
	}
	return group.GetMembers(ctx)
}

// SetGroupMemberRemoveBanned 设置取消禁言
func (*groupApp) SetGroupMemberRemoveBanned(ctx context.Context, optId, groupId int64, removeUserIds []int64) error {
	groupUser, err := repo.GroupUserRepo.Get(groupId, optId)
	if err != nil {
		return err
	}
	if groupUser == nil {
		return errors.New("未查询到群组用户信息")
	}
	if groupUser.MemberType != int(pb.MemberType_GMT_ADMIN) && groupUser.MemberType != int(pb.MemberType_GMT_MANAGE) {
		return errors.New("非管理员操作")
	}

	group, err := repo.GroupRepo.Get(groupId)
	if err != nil {
		return err
	}

	if len(removeUserIds) > 0 {
		//1、更新 `group_user` 的 status 状态
		db.DB.Model(model.GroupUser{}).Where("user_id in (?) and group_id = ?", removeUserIds, groupId).Updates(model.GroupUserV2{Status: sql.NullInt32{Int32: int32(pb.GroupUserStatusType_GROUP_USER_STATUS_NORMAL), Valid: true}})

		//2、给取消禁言用户推送消息
		for _, u := range removeUserIds {
			err = group.PushGroupMemberRemoveBanned(ctx, optId, u)
			if err != nil {
				return err
			}
		}
	}

	return nil
}

// RecallSendMessage 撤回发送消息
func (*groupApp) RecallSendMessage(ctx context.Context, sender *pb.Sender, req *pb.RecallMessageReq) (int64, error) {
	group, err := repo.GroupRepo.Get(req.ReceiverId)
	if err != nil {
		return 0, err
	}

	return group.RecallSendMessage(ctx, sender, req)
}

// SendRedPackage 发送红包消息
func (*groupApp) SendRedPackage(ctx context.Context, sender *pb.Sender, req *pb.SendRedPacketReq) (int64, error) {
	group, err := repo.GroupRepo.Get(req.ReceiverId)
	if err != nil {
		return 0, err
	}

	return group.SendRedPackage(ctx, sender, req)
}