/*
 * Copyright 2013-present the original author or authors.
 *
 * 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
 *
 *      https://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 com.alibaba.cloud.integration.account.service.impl;

import java.sql.Timestamp;

import com.alibaba.cloud.integration.account.mapper.AccountMapper;
import com.alibaba.cloud.integration.account.service.AccountService;
import com.alibaba.cloud.integration.common.BusinessException;
import com.alibaba.cloud.integration.common.Result;
import org.apache.seata.core.context.RootContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author TrevorLink
 */
@Service
public class AccountServiceImpl implements AccountService {

	private Logger logger = LoggerFactory.getLogger(getClass());

	@Autowired
	private AccountMapper accountMapper;

	@Override
	@Transactional
	public void reduceBalance(String userId, Integer price) throws BusinessException {
		logger.info("[reduceBalance] currenet XID: {}", RootContext.getXID());

		checkBalance(userId, price);

		Timestamp updateTime = new Timestamp(System.currentTimeMillis());
		int updateCount = accountMapper.reduceBalance(userId, price, updateTime);
		if (updateCount == 0) {
			throw new BusinessException("reduce balance failed");
		}
	}

	@Override
	public Result<?> getRemainAccount(String userId) {
		Integer balance = accountMapper.getBalance(userId);
		if (balance == null) {
			return Result.failed("wrong userId,please check the userId");
		}
		return Result.success(balance);
	}

	private void checkBalance(String userId, Integer price) throws BusinessException {
		Integer balance = accountMapper.getBalance(userId);
		if (balance < price) {
			throw new BusinessException("no enough balance");
		}
	}

}
