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/**
 * Oshi (https://github.com/dblock/oshi)
 * 
 * Copyright (c) 2010 - 2015 The Oshi Project Team
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 * dblock[at]dblock[dot]org
 * alessandro[at]perucchi[dot]org
 * widdis[at]gmail[dot]com
 * https://github.com/dblock/oshi/graphs/contributors
 */
package oshi.software.os.linux.proc;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.Scanner;

import oshi.software.os.OperatingSystemVersion;

/**
 * Contains operating system version information. The information includes major
 * and minor version numbers, a build number, a platform identifier, and
 * descriptive text about the operating system.
 *
 * @author alessandro[at]perucchi[dot]org
 */
public class OSVersionInfoEx implements OperatingSystemVersion {

	private String _version = null;
	private String _codeName = null;
	private String version = null;

	public OSVersionInfoEx() {
		try (Scanner in = new Scanner(new FileReader("/etc/os-release"))) {
			in.useDelimiter("\n");
			while (in.hasNext()) {
				String[] splittedLine = in.next().split("=");
				if (splittedLine[0].equals("VERSION_ID")) {
					// remove beginning and ending '"' characters, etc from
					// VERSION_ID="14.04"
					setVersion(splittedLine[1].replaceAll("^\"|\"$", ""));
				}
				if (splittedLine[0].equals("VERSION")) {
					// remove beginning and ending '"' characters
					splittedLine[1] = splittedLine[1].replaceAll("^\"|\"$", "");

					// Check basically if the code is between parenthesis or after
					// the comma-space

					// Basically, until now, that seems to be the standard to use
					// parenthesis for the codename.
					String[] split = splittedLine[1].split("[()]");
					if (split.length <= 1)
						// We are probably with Ubuntu, so need to get that part
						// correctly.
						split = splittedLine[1].split(", ");

					if (split.length > 1) {
						setCodeName(split[1]);
					} else {
						setCodeName(splittedLine[1]);
					}
				}
			}
		} catch (FileNotFoundException e) {
			return;
		}
	}

	/**
	 * @return the _codeName
	 */
	public String getCodeName() {
		return this._codeName;
	}

	/**
	 * @return the _version
	 */
	public String getVersion() {
		return this._version;
	}

	/**
	 * @param _codeName
	 *			the _codeName to set
	 */
	public void setCodeName(String _codeName) {
		this._codeName = _codeName;
	}

	/**
	 * @param _version
	 *			the _version to set
	 */
	public void setVersion(String _version) {
		this._version = _version;
	}

	@Override
	public String toString() {
		if (this.version == null) {
			this.version = getVersion() + " (" + getCodeName() + ")";
		}
		return this.version;
	}

}