/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

package com.nokia.testfw.codegen.ui.preferences;

import java.io.File;

import java.util.Random;

import org.eclipse.jface.preference.IPreferenceStore;

import com.nokia.testfw.codegen.ui.CodegenUIPlugin;

public class PreferenceUtil {

	private static IPreferenceStore preferenceStore = CodegenUIPlugin

			.getDefault().getPreferenceStore();

	private static Random random = new Random();

	private static int minValue;

	private static int maxValue;

	private static final int HEX_PREFIX_LEN = "0x".length();

	public static String getTestFolderName(String base) {

		String folder = CodegenUIPlugin.getDefault().getPreferenceStore()

				.getString(PreferenceConstants.TEST_FOLDER_NAME).trim();

		if (base == null) {

			return folder;

		} else {

			return base + File.separator + folder;

		}

	}

	private static void updateMaxMinValue() {

		String hexMin = preferenceStore

				.getString(PreferenceConstants.UID3_MIN_VALUE);

		minValue = Integer.decode(hexMin).intValue();

		String hexMax = preferenceStore

				.getString(PreferenceConstants.UID3_MAX_VALUE);

		maxValue = Integer.decode(hexMax).intValue();

	}

	public static String getRandomAppUID() {

		updateMaxMinValue();

		int value = Math.abs(random.nextInt());

		value = value % (maxValue - minValue) + minValue;

		return createCanonicalHexString(value);

	}

	public static String createCanonicalHexString(int value) {

		char ZEROS[] = { '0', '0', '0', '0', '0', '0', '0', '0' };

		String unprocessedHex = Long.toHexString(value).toUpperCase();

		StringBuffer buf = new StringBuffer(10);

		buf.append("0x");

		int numSigDigits = unprocessedHex.length();

		int numLeadingZeros = 8 - numSigDigits;

		if (numLeadingZeros > 0)

			buf.append(ZEROS, 0, numLeadingZeros);

		buf.append(unprocessedHex);

		return buf.toString();

	}

	public static boolean validateAppUIDValue(int value) {

		updateMaxMinValue();

		return value >= minValue && value <= maxValue;

	}

	public static boolean validateAppUIDText(String text) {

		if(text.length()<2){

			return false;

		}

		if (!text.substring(0, HEX_PREFIX_LEN).equalsIgnoreCase("0x"))

			return false;

		String valueText = text.substring(HEX_PREFIX_LEN);

		int value = -1;

		try {

			value = Integer.parseInt(valueText, 16);

		} catch (NumberFormatException _ex) {

		}

		return PreferenceUtil.validateAppUIDValue(value);

	}

}