package net.oni2.aeinstaller.backend;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Vector;

import net.oni2.aeinstaller.backend.app_launcher.QuickAppExecution;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.StaxDriver;

/**
 * Manages and stores programm settings
 * 
 * @author Christian Illy
 */
public class Settings implements Serializable {

	private static final long serialVersionUID = 8067725289301601179L;

	/**
	 * @author Christian Illy
	 */
	public enum Architecture {
		/**
		 * 32 bit
		 */
		X86,
		/**
		 * 64 bit
		 */
		AMD64
	};

	/**
	 * @author Christian Illy
	 */
	public enum Platform {
		/**
		 * Running Windows
		 */
		WIN,
		/**
		 * Running MacOS
		 */
		MACOS,
		/**
		 * Running a Linux
		 */
		LINUX,
		/**
		 * Unknown OS
		 */
		UNKNOWN
	}

	private static Settings instance = new Settings();

	private static boolean debugRun = false;

	private HashMap<String, Object> prefs = new HashMap<String, Object>();

	private boolean printNamesNotInMap = false;

	/**
	 * Get the singleton instance
	 * 
	 * @return Singleton instance
	 */
	public static Settings getInstance() {
		return instance;
	}

	/**
	 * @param debug
	 *            Debug mode
	 */
	public static void setDebug(boolean debug) {
		debugRun = debug;
	}

	/**
	 * @return Is debug run
	 */
	public static boolean getDebug() {
		return debugRun;
	}

	/**
	 * @return Processor architecture
	 */
	public static Architecture getArchitecture() {
		switch (getPlatform()) {
			case WIN:
				String arch = System.getenv("PROCESSOR_ARCHITECTURE")
						.toLowerCase();
				if (arch.startsWith("x86"))
					return Architecture.X86;
				return Architecture.AMD64;
			case MACOS:
			case LINUX:
				Vector<String> cmd = new Vector<String>();
				cmd.add("getconf");
				cmd.add("LONG_BIT");
				Vector<String> res = null;
				try {
					res = QuickAppExecution.execute(cmd);
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				if (res != null) {
					if (res.get(0).equals("64"))
						return Architecture.AMD64;
				}
				return Architecture.X86;
			default:
				return null;
		}
	}

	/**
	 * @return The operating system running on
	 */
	public static Platform getPlatform() {
		String os = System.getProperty("os.name").toLowerCase();
		if (os.startsWith("win"))
			return Platform.WIN;
		if (os.startsWith("linux"))
			return Platform.LINUX;
		if (os.startsWith("mac"))
			return Platform.MACOS;
		return Platform.UNKNOWN;
	}

	/**
	 * @return Mod Depot cache filename
	 */
	public static File getDepotCacheFilename() {
		return new File(Paths.getPrefsPath(), "ModDepotCache.xml");
	}

	private static File getSettingsFilename() {
		return new File(Paths.getPrefsPath(), "AEI-Settings.xml");
	}

	private static XStream getXStream() {
		XStream xs = new XStream(new StaxDriver());
		xs.alias("Settings", Settings.class);
		return xs;
	}

	/**
	 * Serializes the settings to disk
	 */
	public void serializeToFile() {
		try {
			FileOutputStream fos = new FileOutputStream(getSettingsFilename());
			XStream xs = getXStream();
			xs.toXML(this, fos);
			fos.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * Deserializes the settings from disk
	 */
	public static void deserializeFromFile() {
		try {
			FileInputStream fis = new FileInputStream(getSettingsFilename());
			XStream xs = getXStream();
			Object obj = xs.fromXML(fis);
			if (obj instanceof Settings)
				instance = (Settings) obj;
			fis.close();
		} catch (FileNotFoundException e) {
		} catch (IOException e) {
		}
	}

	/**
	 * Put a string value
	 * 
	 * @param key
	 *            Key for value
	 * @param value
	 *            Value
	 */
	public void put(String key, String value) {
		prefs.put(key, value);
	}

	/**
	 * Put a boolean value
	 * 
	 * @param key
	 *            Key for value
	 * @param value
	 *            Value
	 */
	public void put(String key, boolean value) {
		prefs.put(key, value);
	}

	/**
	 * Put a int value
	 * 
	 * @param key
	 *            Key for value
	 * @param value
	 *            Value
	 */
	public void put(String key, int value) {
		prefs.put(key, value);
	}

	/**
	 * Get a string value
	 * 
	 * @param key
	 *            Key for value
	 * @param def
	 *            Default return value if key does not exist
	 * @return Value
	 */
	public String get(String key, String def) {
		if (prefs.containsKey(key)) {
			if (prefs.get(key) instanceof String)
				return (String) (prefs.get(key));
		}
		if (printNamesNotInMap)
			System.out.println("Settings: Key \"" + key
					+ "\" not in Map, defaulting to \"" + def + "\".");
		return def;
	}

	/**
	 * Get a boolean value
	 * 
	 * @param key
	 *            Key for value
	 * @param def
	 *            Default return value if key does not exist
	 * @return Value
	 */
	public Boolean get(String key, Boolean def) {
		if (prefs.containsKey(key)) {
			if (prefs.get(key) instanceof Boolean)
				return (Boolean) (prefs.get(key));
		}
		if (printNamesNotInMap)
			System.out.println("Settings: Key \"" + key
					+ "\" not in Map, defaulting to \"" + def + "\".");
		return def;
	}

	/**
	 * Get a int value
	 * 
	 * @param key
	 *            Key for value
	 * @param def
	 *            Default return value if key does not exist
	 * @return Value
	 */
	public int get(String key, int def) {
		if (prefs.containsKey(key)) {
			if (prefs.get(key) instanceof Integer)
				return (Integer) (prefs.get(key));
		}
		if (printNamesNotInMap)
			System.out.println("Settings: Key \"" + key
					+ "\" not in Map, defaulting to \"" + def + "\".");
		return def;
	}

	/**
	 * Remove a value
	 * 
	 * @param key
	 *            Key to value to remove
	 */
	public void removeValue(String key) {
		prefs.remove(key);
	}

}