package model

import (
	"fmt"
	"github.com/zeromicro/go-zero/core/stores/sqlx"
)

var _ CbMsgModel = (*customCbMsgModel)(nil)

type (
	// CbMsgModel is an interface to be customized, add more methods here,
	// and implement the added methods in customCbMsgModel.
	CbMsgModel interface {
		cbMsgModel
		GetCustomerLastMsg(openKfid, externalUserid string) (CbMsg, error)
	}

	customCbMsgModel struct {
		*defaultCbMsgModel
	}
)

// NewCbMsgModel returns a model for the database table.
func NewCbMsgModel(conn sqlx.SqlConn) CbMsgModel {
	return &customCbMsgModel{
		defaultCbMsgModel: newCbMsgModel(conn),
	}
}

func (c *customCbMsgModel) GetCustomerLastMsg(openKfid, externalUserid string) (msg CbMsg, err error) {
	query := fmt.Sprintf("select * from %s where id IN (select MAX(id) from %s where `open_kfid` = ? AND `external_userid` = ?)", c.table, c.table)
	err = c.conn.QueryRow(&msg, query, openKfid, externalUserid)
	return
}