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/* Copyright 2009-2024 David Hadka and other contributors
 *
 * This file is part of the MOEA Framework.
 *
 * The MOEA Framework is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * The MOEA Framework is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the MOEA Framework.  If not, see .
 */
package org.moeaframework.problem;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class NativeCommand {
	
	private final String executableName;
	
	private final String[] arguments;
	
	private final File workingDirectory;
	
	public NativeCommand(String executableName, String[] arguments) {
		this(executableName, arguments, null);
	}

	public NativeCommand(String executableName, String[] arguments, File workingDirectory) {
		super();
		this.executableName = executableName;
		this.arguments = arguments;
		this.workingDirectory = workingDirectory;
	}

	public String getExecutableName() {
		return executableName;
	}

	public String[] getArguments() {
		return arguments;
	}
	
	public File getWorkingDirectory() {
		return workingDirectory;
	}
	
	public Process exec() throws IOException {
		return toProcessBuilder(OsType.getOsType()).start();
	}
	
	public ProcessBuilder toProcessBuilder(OsType osType) {
		List command = new ArrayList();
		String executableName = getExecutableName();
		File workingDirectory = getWorkingDirectory();
		
		if (osType == OsType.WINDOWS && !executableName.toLowerCase().endsWith(".exe")) {
			executableName += ".exe";
		}

		if (new File(workingDirectory, executableName).exists()) {
			// Executable exists in working directory, run directly.
			File relativePath = osType == OsType.WINDOWS ? workingDirectory : new File(".");
			command.add(new File(relativePath, executableName).getPath());
		} else {
			// Executable not found, attempt to run from PATH.
			command.add(executableName);
		}

		command.addAll(List.of(getArguments()));
		
		return new ProcessBuilder()
				.command(command)
				.directory(getWorkingDirectory());
	}

}