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/*
 * Copyright 2023 Greptime Team
 *
 * 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
 *
 *     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 io.greptime.common.signal;

import io.greptime.common.Keys;
import io.greptime.common.util.Files;
import io.greptime.common.util.SystemPropertyUtil;
import java.io.File;
import java.io.IOException;
import java.nio.file.Paths;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * File output helper.
 */
public final class FileOutputHelper {

    private static final String OUT_DIR = SystemPropertyUtil.get(Keys.SIG_OUT_DIR, "");

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

    public static String getOutDir() {
        return Paths.get(OUT_DIR).toAbsolutePath().toString();
    }

    private FileOutputHelper() {}
}