/*
 * Copyright OpenSearch Contributors
 * SPDX-License-Identifier: Apache-2.0
 */

package org.opensearch.performanceanalyzer.util;

import static java.nio.file.StandardCopyOption.COPY_ATTRIBUTES;
import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class CopyTestResource implements AutoCloseable {
    private String path;

    public String getPath() {
        return path;
    }

    public CopyTestResource(String srcPath, String desPath) {
        if (srcPath.equals(desPath)) {
            throw new RuntimeException("srcPath and desPath cannot be same");
        }

        System.out.println(
                "copying from "
                        + Paths.get(srcPath).toAbsolutePath().toString()
                        + " to "
                        + Paths.get(desPath).toAbsolutePath().toString());

        path = desPath;
        try {
            Files.walk(Paths.get(srcPath))
                    .forEach(
                            (Path a) -> {
                                Path b =
                                        Paths.get(
                                                desPath, a.toString().substring(srcPath.length()));
                                try {
                                    Files.copy(a, b, REPLACE_EXISTING, COPY_ATTRIBUTES);
                                } catch (IOException e) {
                                    e.printStackTrace();
                                }
                            });
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void close() throws Exception {
        try {
            delete(new File(path));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void delete(File file) throws IOException {

        for (File childFile : file.listFiles()) {

            if (childFile.isDirectory()) {
                delete(childFile);
            } else {
                if (!childFile.delete()) {
                    throw new IOException();
                }
            }
        }

        if (!file.delete()) {
            throw new IOException();
        }
    }
}