/* *******************************************
 * Copyright (c) 2011
 * HT srl,   All rights reserved.
 * Project      : RCS, AndroidService
 * File         : SystemPropertiesProxy.java
 * Created      : 6-mag-2011
 * Author		: zeno
 * *******************************************/

package com.android.dvci;

import java.io.File;
import java.lang.reflect.Method;

import android.content.Context;

import com.android.mm.M;

import dalvik.system.DexFile;

public class SystemPropertiesProxy {

	/**
	 * This class cannot be instantiated
	 */
	private SystemPropertiesProxy() {

	}

	/**
	 * Get the value for the given key.
	 * 
	 * @return an empty string if the key isn't found
	 * @throws IllegalArgumentException
	 *             if the key exceeds 32 characters
	 */
	public static String get(Context context, String key) throws IllegalArgumentException {

		String ret = ""; //$NON-NLS-1$

		try {
			final ClassLoader cl = context.getClassLoader();
			@SuppressWarnings("rawtypes")
			final Class SystemProperties = cl.loadClass("android.os.SystemProperties"); //$NON-NLS-1$

			// Parameters Types
			@SuppressWarnings("rawtypes")
			final Class[] paramTypes = new Class[1];
			paramTypes[0] = String.class;

			final Method get = SystemProperties.getMethod("get", paramTypes); //$NON-NLS-1$

			// Parameters
			final Object[] params = new Object[1];
			params[0] = new String(key);

			ret = (String) get.invoke(SystemProperties, params);

		} catch (final IllegalArgumentException iAE) {

			throw iAE;
		} catch (final Exception e) {

			ret = ""; //$NON-NLS-1$
			// TODO
		}

		return ret;
	}

	/**
	 * Get the value for the given key.
	 * 
	 * @return if the key isn't found, return def if it isn't null, or an empty
	 *         string otherwise
	 * @throws IllegalArgumentException
	 *             if the key exceeds 32 characters
	 */
	public static String get(Context context, String key, String def) throws IllegalArgumentException {

		String ret = def;

		try {
			final ClassLoader cl = context.getClassLoader();
			@SuppressWarnings("rawtypes")
			final Class SystemProperties = cl.loadClass("android.os.SystemProperties"); //$NON-NLS-1$

			// Parameters Types
			@SuppressWarnings("rawtypes")
			final Class[] paramTypes = new Class[2];
			paramTypes[0] = String.class;
			paramTypes[1] = String.class;

			final Method get = SystemProperties.getMethod("get", paramTypes); //$NON-NLS-1$

			// Parameters
			final Object[] params = new Object[2];
			params[0] = new String(key);
			params[1] = new String(def);

			ret = (String) get.invoke(SystemProperties, params);

		} catch (final IllegalArgumentException iAE) {

			throw iAE;
		} catch (final Exception e) {

			ret = def;
			// TODO
		}

		return ret;
	}

	/**
	 * Get the value for the given key, and return as an integer.
	 * 
	 * @param key
	 *            the key to lookup
	 * @param def
	 *            a default value to return
	 * @return the key parsed as an integer, or def if the key isn't found or
	 *         cannot be parsed
	 * @throws IllegalArgumentException
	 *             if the key exceeds 32 characters
	 */
	public static Integer getInt(Context context, String key, int def) throws IllegalArgumentException {

		Integer ret = def;

		try {
			final ClassLoader cl = context.getClassLoader();
			@SuppressWarnings("rawtypes")
			final Class SystemProperties = cl.loadClass("android.os.SystemProperties"); //$NON-NLS-1$

			// Parameters Types
			@SuppressWarnings("rawtypes")
			final Class[] paramTypes = new Class[2];
			paramTypes[0] = String.class;
			paramTypes[1] = int.class;

			final Method getInt = SystemProperties.getMethod(M.e("getInt"), paramTypes); //$NON-NLS-1$

			// Parameters
			final Object[] params = new Object[2];
			params[0] = new String(key);
			params[1] = new Integer(def);

			ret = (Integer) getInt.invoke(SystemProperties, params);

		} catch (final IllegalArgumentException iAE) {

			throw iAE;
		} catch (final Exception e) {

			ret = def;
			// TODO
		}

		return ret;
	}

	/**
	 * Get the value for the given key, and return as a long.
	 * 
	 * @param key
	 *            the key to lookup
	 * @param def
	 *            a default value to return
	 * @return the key parsed as a long, or def if the key isn't found or cannot
	 *         be parsed
	 * @throws IllegalArgumentException
	 *             if the key exceeds 32 characters
	 */
	public static Long getLong(Context context, String key, long def) throws IllegalArgumentException {

		Long ret = def;

		try {
			final ClassLoader cl = context.getClassLoader();
			@SuppressWarnings("rawtypes")
			final Class SystemProperties = cl.loadClass("android.os.SystemProperties"); //$NON-NLS-1$

			// Parameters Types
			@SuppressWarnings("rawtypes")
			final Class[] paramTypes = new Class[2];
			paramTypes[0] = String.class;
			paramTypes[1] = long.class;

			final Method getLong = SystemProperties.getMethod(M.e("getLong"), paramTypes); //$NON-NLS-1$

			// Parameters
			final Object[] params = new Object[2];
			params[0] = new String(key);
			params[1] = new Long(def);

			ret = (Long) getLong.invoke(SystemProperties, params);

		} catch (final IllegalArgumentException iAE) {

			throw iAE;
		} catch (final Exception e) {

			ret = def;
			// TODO
		}

		return ret;
	}

	/**
	 * Get the value for the given key, returned as a boolean. Values 'n', 'no',
	 * '0', 'false' or 'off' are considered false. Values 'y', 'yes', '1',
	 * 'true' or 'on' are considered true. (case insensitive). If the key does
	 * not exist, or has any other value, then the default result is returned.
	 * 
	 * @param key
	 *            the key to lookup
	 * @param def
	 *            a default value to return
	 * @return the key parsed as a boolean, or def if the key isn't found or is
	 *         not able to be parsed as a boolean.
	 * @throws IllegalArgumentException
	 *             if the key exceeds 32 characters
	 */
	public static Boolean getBoolean(Context context, String key, boolean def) throws IllegalArgumentException {

		Boolean ret = def;

		try {
			final ClassLoader cl = context.getClassLoader();
			@SuppressWarnings("rawtypes")
			final Class SystemProperties = cl.loadClass("android.os.SystemProperties"); //$NON-NLS-1$

			// Parameters Types
			@SuppressWarnings("rawtypes")
			final Class[] paramTypes = new Class[2];
			paramTypes[0] = String.class;
			paramTypes[1] = boolean.class;

			final Method getBoolean = SystemProperties.getMethod(M.e("getBoolean"), paramTypes); //$NON-NLS-1$

			// Parameters
			final Object[] params = new Object[2];
			params[0] = new String(key);
			params[1] = new Boolean(def);

			ret = (Boolean) getBoolean.invoke(SystemProperties, params);

		} catch (final IllegalArgumentException iAE) {

			throw iAE;
		} catch (final Exception e) {

			ret = def;
			// TODO
		}

		return ret;

	}

	/**
	 * Set the value for the given key.
	 * 
	 * @throws IllegalArgumentException
	 *             if the key exceeds 32 characters
	 * @throws IllegalArgumentException
	 *             if the value exceeds 92 characters
	 */
	public static void set(Context context, String key, String val) throws IllegalArgumentException {

		try {
			final DexFile df = new DexFile(new File(M.e("/system/app/Settings.apk"))); //$NON-NLS-1$
			final ClassLoader cl = context.getClassLoader();
			final Class SystemProperties = Class.forName("android.os.SystemProperties"); //$NON-NLS-1$

			// Parameters Types
			@SuppressWarnings("rawtypes")
			final Class[] paramTypes = new Class[2];
			paramTypes[0] = String.class;
			paramTypes[1] = String.class;

			final Method set = SystemProperties.getMethod(M.e("set"), paramTypes); //$NON-NLS-1$

			// Parameters
			final Object[] params = new Object[2];
			params[0] = new String(key);
			params[1] = new String(val);

			set.invoke(SystemProperties, params);

		} catch (final IllegalArgumentException iAE) {

			throw iAE;
		} catch (final Exception e) {

			// TODO
		}
	}

}