/*

* Copyright (c) 2008 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.s60tools.crashanalyser.model;

import org.eclipse.jface.dialogs.IDialogSettings;

import com.nokia.s60tools.crashanalyser.plugin.CrashAnalyserPlugin;

/**

 * This class is used to save and restore data which is entered by user in 

 * wizard pages.

 *

 */

public class UserEnteredData {

	// sections for each wizard page

	public static final String SECTION_CRASH_FILE_OR_FOLDER = "CrashFileOrFolderPage"; //$NON-NLS-1$

	public static final String SECTION_PARAMETER_FILES = "ParameterFilesPage"; //$NON-NLS-1$

	public static final String SECTION_ADDITIONAL_SETTINGS = "AdditionalSettingsPage"; //$NON-NLS-1$

	public static final String SECTION_CALL_STACK = "CallStack";

	// FileOrPathSelectionPage

	public static final String LAST_USED_CRASH_FILES_OR_FOLDERS = "CrashFilesOrPaths"; //$NON-NLS-1$

	//SDK selection for Call Stack popup menu

	public static final String LAST_USED_SOURCE_SDK = "LastUsedSourceSdk";

	public static enum ValueTypes {	CRASH_FILE_OR_PATH, 

									TEXT_OR_HTML_OUTPUT_PATH} 

	public static final int MAX_SAVED_VALUES = 5;

	/**

	 * Returns values user has previously entered to wizard pages.

	 * @param valueType type of the values 

	 * @return user's previous values

	 */

	public String[] getPreviousValues(ValueTypes valueType) {

		try {

			String[] retVal = null;

			if (ValueTypes.CRASH_FILE_OR_PATH.equals(valueType)) {

				retVal = getPreviousPaths(SECTION_CRASH_FILE_OR_FOLDER, LAST_USED_CRASH_FILES_OR_FOLDERS);

			}

			return retVal;

		} catch (Exception e) {

			return null;

		}

	}

	/**

	 * Saves user's latest value.

	 * @param pathType value type

	 * @param value value to be saved

	 */

	public void saveValue(ValueTypes pathType, String value) {

		if (value.trim().length() < 1)

			return;

		try {

			if (ValueTypes.CRASH_FILE_OR_PATH.equals(pathType)) {

				savePath(value, LAST_USED_CRASH_FILES_OR_FOLDERS, getSection(SECTION_CRASH_FILE_OR_FOLDER));

			}

		} catch (Exception E) {

			E.printStackTrace();

		}

	}

	public void savePreviousSdk(String sdkName) {

		try {

			IDialogSettings section = getSection(SECTION_CALL_STACK);

			if (section != null) {

				section.put(LAST_USED_SOURCE_SDK, sdkName);

			}

		} catch (Exception E) {

			E.printStackTrace();

		}

	}

	public String getPreviousSdk() {

		String retval = "";

		try {

			IDialogSettings section = getSection(SECTION_CALL_STACK);

			if (section != null) {

				retval = section.get(LAST_USED_SOURCE_SDK);

			}

		} catch (Exception E) {

			E.printStackTrace();

		}

		return retval;

	}

	/**

	 * Saves given path to correct section in dialog_settings.xml

	 * @param path path to save

	 * @param array name of the array which contains correct values

	 * @param section section which has array 

	 */

	protected void savePath(String path, String array, IDialogSettings section) {

		savePath(path, array, section, false);

	}

	/**

	 * Saves given path to correct section in dialog_settings.xml

	 * @param path path to save

	 * @param array name of the array which contains correct values

	 * @param section section which has array 

	 * @param saveJustOne if true, only 'path' is saved. If false, 'path' is added to previously used paths.

	 */

	protected void savePath(String path, String array, IDialogSettings section, boolean saveJustOne) {

		if (section != null) {

			String[] previousValues = section.getArray(array);

			// No previous values exist

			if (previousValues == null) {

				previousValues = new String[1];

				previousValues[0] = path;

			// Previous values exists

			} else {

				int valuesCount = previousValues.length;

				boolean valueExisted = false;

				// see if passed value already exist.

				for (int i = 0; i < valuesCount; i++) {

					if (previousValues[i].compareToIgnoreCase(path) == 0) {

						valueExisted = true;

						// passed value exists, move it to first position

						for (int j = i; j > 0; j--) {

							previousValues[j] = previousValues[j-1];

						}

						previousValues[0] = path;

						break;

					}

				}

				// passed value did not exist, add it to first position (and move older values "down")

				if (!valueExisted) {

					if (valuesCount >= MAX_SAVED_VALUES) {

						for (int i = valuesCount-1; i > 0; i--) {

							previousValues[i] = previousValues[i-1];

						}

						previousValues[0] = path;

					} else {

						String[] values = new String[valuesCount + 1];

						values[0] = path;

						for (int i = 0; i < valuesCount; i++) {

							values[i+1] = previousValues[i];

						}

						previousValues = values;

					}

				}

			}

			section.put(array, previousValues);

		}

	}

	/**

	 * Returns previously entered values of wanted context (i.e. wizard page).

	 * @param section section which contains array

	 * @param array name of the array whose values are needed

	 * @return previously entered paths of given section

	 */

	protected String[] getPreviousPaths(String section, String array) {

		String[] retVal = null;

		IDialogSettings sect = getSection(section);

		if (sect != null) {

			retVal = sect.getArray(array);

		}

		return retVal;

	}

	/**

	 * Returns wanted section

	 * @param section name of the wanted section

	 * @return wanted section

	 */

	protected IDialogSettings getSection(String section) {

		IDialogSettings retVal = null;

		if (CrashAnalyserPlugin.getDefault().getDialogSettings() != null) {

			retVal = CrashAnalyserPlugin.getDefault().getDialogSettings().getSection(section);

			if (retVal == null) {

				retVal = CrashAnalyserPlugin.getDefault().getDialogSettings().addNewSection(section);

			}

		}

		return retVal;

	}	

	public static IDialogSettings getParameterFilesSection() {

		IDialogSettings retVal = null;

		if (CrashAnalyserPlugin.getDefault().getDialogSettings() != null) {

			retVal = CrashAnalyserPlugin.getDefault().getDialogSettings().getSection(SECTION_PARAMETER_FILES);

			if (retVal == null) {

				retVal = CrashAnalyserPlugin.getDefault().getDialogSettings().addNewSection(SECTION_PARAMETER_FILES);

			}

		}

		return retVal;

	}

}