/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *     http://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.alipay.sofa.jraft.util;

import java.io.File;
import java.io.IOException;
import java.nio.file.Paths;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.io.FileUtils;

/**
 *
 * @author jiachun.fjc
 */
public abstract class FileOutputSignalHandler implements JRaftSignalHandler {

    protected File getOutputFile(final String path, final String baseFileName) throws IOException {
        makeDir(path);
        final String now = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss").format(new Date());
        final String fileName = baseFileName + "." + now;
        final File file = Paths.get(path, fileName).toFile();
        if (!file.exists() && !file.createNewFile()) {
            throw new IOException("Fail to create file: " + file);
        }
        return file;
    }

    private static void makeDir(final String path) throws IOException {
        final File dir = Paths.get(path).toFile().getAbsoluteFile();
        if (dir.exists()) {
            Requires.requireTrue(dir.isDirectory(), String.format("[%s] is not directory.", path));
        } else {
            FileUtils.forceMkdir(dir);
        }
    }
}
