/*

* 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 the License "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.cdt.internal.debug.launch.ui;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.StringTokenizer;

import org.eclipse.cdt.debug.core.ICDTLaunchConfigurationConstants;

import org.eclipse.cdt.debug.core.executables.Executable;

import org.eclipse.cdt.debug.core.executables.ExecutablesManager;

import org.eclipse.cdt.debug.core.executables.IExecutablesChangeListener;

import org.eclipse.cdt.launch.AbstractCLaunchDelegate;

import org.eclipse.cdt.launch.ui.CLaunchConfigurationTab;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.runtime.IPath;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Path;

import org.eclipse.core.runtime.Status;

import org.eclipse.core.runtime.jobs.Job;

import org.eclipse.debug.core.ILaunchConfiguration;

import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;

import org.eclipse.jface.dialogs.Dialog;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.graphics.Image;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Combo;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Event;

import org.eclipse.swt.widgets.FileDialog;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Listener;

import org.eclipse.ui.PlatformUI;

import org.eclipse.ui.progress.UIJob;

import com.nokia.carbide.cdt.builder.CarbideBuilderPlugin;

import com.nokia.carbide.cdt.builder.EpocEngineHelper;

import com.nokia.carbide.cdt.builder.project.ICarbideBuildConfiguration;

import com.nokia.carbide.cdt.builder.project.ICarbideProjectInfo;

import com.nokia.cdt.debug.cw.symbian.SettingsData;

import com.nokia.cdt.internal.debug.launch.LaunchPlugin;

import com.nokia.cdt.internal.debug.launch.NokiaAbstractLaunchDelegate;

import cwdbg.PreferenceConstants;

public class ExecutablesTab extends CLaunchConfigurationTab implements IExecutablesChangeListener {

	public class ExecutablesTabHeader extends Composite {

		/**

		 * Create the composite

		 * 

		 * @param parent

		 * @param style

		 */

		public ExecutablesTabHeader(Composite parent, int style) {

			super(parent, style);

			final GridLayout gridLayout = new GridLayout();

			gridLayout.numColumns = 2;

			setLayout(gridLayout);

			final Label specifyWhichExecutablesLabel = new Label(this, SWT.NONE);

			specifyWhichExecutablesLabel.setText(Messages.getString("ExecutablesTab.0")); //$NON-NLS-1$

			new Label(this, SWT.NONE);

			targetingRulesCombo = new Combo(this, SWT.READ_ONLY);

			targetingRulesCombo.setItems(new String[] { Messages.getString("ExecutablesTab.1"), //$NON-NLS-1$

					Messages.getString("ExecutablesTab.2"), Messages.getString("ExecutablesTab.3") }); //$NON-NLS-1$ //$NON-NLS-2$

			if (supportsTargetAll)

			{

				targetingRulesCombo.add(Messages.getString("ExecutablesTab.4")); //$NON-NLS-1$

			}

			targetingRulesCombo.setText(Messages.getString("ExecutablesTab.5")); //$NON-NLS-1$

			final GridData gd_targetingRulesCombo = new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 1);

			targetingRulesCombo.setLayoutData(gd_targetingRulesCombo);

			targetingRulesCombo.addListener(SWT.Selection, new Listener() {

				public void handleEvent(Event e) {

					changeTargetingRule(targetingRulesCombo.getSelectionIndex());

					ExecutablesTab.this.setDirty(true);

					updateLaunchConfigurationDialog();

				}

			});

			//

		}

	}

	private Combo targetingRulesCombo;

	private ExecutablesBlock executablesBlock;

	private ILaunchConfiguration configuration;

	private Button addButton;

	private Button selectAllButton;

	private Button unselectAllButton;

	private int targetingRule;

	private boolean supportsTargetAll;

	private boolean disposed;

	private boolean wantsMainExecutable;

	private List<ExeFileToDebug> executablesToTarget;

	public ExecutablesTab(boolean supportsTargetAll) {

		this.supportsTargetAll = supportsTargetAll;

		executablesToTarget = Collections.emptyList(); // avoid NPE if accessed before filled

	}

	/* (non-Javadoc)

	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#createControl(org.eclipse.swt.widgets.Composite)

	 */

	public void createControl(Composite parent) {

		Composite comp = new Composite(parent, SWT.NONE);

		setControl(comp);

		PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), LaunchTabHelpIds.ALL_EXECUTABLES);

		GridLayout layout = new GridLayout();

		layout.numColumns = 3;

		layout.marginHeight = 0;

		layout.marginWidth = 0;

		comp.setLayout(layout);

		ExecutablesTabHeader header = new ExecutablesTabHeader(comp, SWT.NONE);

		header.setLayoutData(new GridData(GridData.FILL_HORIZONTAL, GridData.FILL_VERTICAL, true, false, 3, 1));

		executablesBlock = new ExecutablesBlock(this, wantsMainExecutable);

		executablesBlock.createControl(comp);

		Control control = executablesBlock.getControl();

		GridData data = new GridData(GridData.FILL_BOTH);

		control.setLayoutData(data);

		Composite buttonComp = new Composite(comp, SWT.NONE);

		buttonComp.setLayout(new GridLayout(3, false));

		buttonComp.setLayoutData(new GridData(GridData.BEGINNING, GridData.BEGINNING, false, false, 3, 1));

		addButton = new Button(buttonComp, SWT.PUSH);

		addButton.setText(Messages.getString("ExecutablesTab.6")); //$NON-NLS-1$

		addButton.addSelectionListener(new SelectionAdapter() {

			public void widgetSelected(SelectionEvent e) {

				FileDialog dialog = new FileDialog(getShell(), SWT.NONE);

				dialog.setText(Messages.getString("ExecutablesTab.7")); //$NON-NLS-1$

				final String res = dialog.open();

				if (res != null) {

					Job importJob = new Job(Messages.getString("ExecutablesTab.8")) { //$NON-NLS-1$

						@Override

						public IStatus run(IProgressMonitor monitor) {

							ExecutablesManager.getExecutablesManager().importExecutables(new String[] { res }, monitor);

							return Status.OK_STATUS;

						}

					};

					importJob.schedule();

				}

			}

		});

		selectAllButton = new Button(buttonComp, SWT.PUSH);

		selectAllButton.setText(Messages.getString("ExecutablesTab.9")); //$NON-NLS-1$

		selectAllButton.addSelectionListener(new SelectionAdapter() {

			public void widgetSelected(SelectionEvent e) {

				executablesBlock.setAllChecked(true);

			}

		});

		unselectAllButton = new Button(buttonComp, SWT.PUSH);

		unselectAllButton.setText(Messages.getString("ExecutablesTab.10")); //$NON-NLS-1$

		unselectAllButton.addSelectionListener(new SelectionAdapter() {

			public void widgetSelected(SelectionEvent e) {

				executablesBlock.setAllChecked(false);

			}

		});

		ExecutablesManager.getExecutablesManager().addExecutablesChangeListener(this);

		Dialog.applyDialogFont(parent);

	}

	@Override

	public void dispose() {

		disposed = true;

		ExecutablesManager.getExecutablesManager().removeExecutablesChangeListener(this);

		super.dispose();

	}

	/* (non-Javadoc)

	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#setDefaults(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)

	 */

	public void setDefaults(ILaunchConfigurationWorkingCopy config) {

	}

	/* (non-Javadoc)

	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#initializeFrom(org.eclipse.debug.core.ILaunchConfiguration)

	 */

	public void initializeFrom(ILaunchConfiguration configuration) {

		this.configuration = configuration;

		wantsMainExecutable = SettingsData.isStopModeConfiguration(configuration);

		try {

			int targetingRule = configuration.getAttribute(SettingsData.LCS_ExecutableTargetingRule,

					SettingsData.LCS_ExeTargetingRule_AllInSDK); //$NON-NLS-1$

			targetingRulesCombo.select(targetingRule);

			changeTargetingRule(targetingRule);

		} catch (CoreException e) {

			LaunchPlugin.log(e);

		}

	}

	public static String getExecutablesToTarget(ILaunchConfiguration config, IProgressMonitor monitor) throws CoreException {

		int targetingRule = config.getAttribute(SettingsData.LCS_ExecutableTargetingRule, SettingsData.LCS_ExeTargetingRule_AllInSDK);

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

		if (targetingRule == SettingsData.LCS_ExeTargetingRule_ExeList) {

			filesString = config.getAttribute(PreferenceConstants.J_PN_ExecutablesToDebug, ""); //$NON-NLS-1$			

		} else {

			List<ExeFileToDebug> exeFiles = ExecutablesTab.getExecutablesToTarget(targetingRule, config, monitor);

			filesString = ExecutablesTab.getExeFilesAsString(exeFiles.toArray(new ExeFileToDebug[exeFiles.size()]));

		}

		return filesString;

	}

	private static String getExeFilesAsString(ExeFileToDebug[] files) {

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

		for (int i = 0; i < files.length; i++) {

			filesString += files[i].getExePath() + "," + (files[i].getEnabled() ? "1" : "0") + ","; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$

		}

		return filesString;

	}

	/* (non-Javadoc)

	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#performApply(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)

	 */

	public void performApply(ILaunchConfigurationWorkingCopy configuration) {

		int targetingRule = targetingRulesCombo.getSelectionIndex();

		configuration.setAttribute(SettingsData.LCS_ExecutableTargetingRule, targetingRule);

		if (targetingRule == SettingsData.LCS_ExeTargetingRule_ExeList) {

			String filesString = getExeFilesAsString(executablesBlock.getFiles());

			configuration.setAttribute(PreferenceConstants.J_PN_ExecutablesToDebug, filesString);

		}

		if (targetingRule == SettingsData.LCS_ExeTargetingRule_All)

			configuration.setAttribute(

					PreferenceConstants.J_PN_SymbolLoadingRule,

					PreferenceConstants.J_PV_SymbolLoadingRule_All);

		else

			configuration.setAttribute(

					PreferenceConstants.J_PN_SymbolLoadingRule,

					PreferenceConstants.J_PV_SymbolLoadingRule_Auto);

		if (!wantsMainExecutable) {

			// get the current program name because it needs to be set to some executable to target

			String programName = null;

			try {

				programName = AbstractCLaunchDelegate.getProgramName(configuration);

			} catch (CoreException e) {

			}

			// only do this when the current program name is not empty.  if it is, we'll be changing it

			// which causes the apply button to become enabled which is not expected behavior.  this will

			// be called later if/when they do specify the main program, so we'll make sure then that it's

			// actually being targeted.

			if (programName.length() > 0) {

				boolean resetProgramName = true;

				// check to see if the current program name is one of the executables to target

				for (ExeFileToDebug exeFileToDebug : executablesToTarget) {

					if (exeFileToDebug.getExePath().equalsIgnoreCase(programName)) {

						resetProgramName = false;

						break;

					}

				}

				if (resetProgramName) {

					// ensure one of the enabled files to target is set as the program name

					for (ExeFileToDebug exeFileToDebug : executablesToTarget) {

						if (exeFileToDebug.getEnabled()) {

							configuration.setAttribute(ICDTLaunchConfigurationConstants.ATTR_PROGRAM_NAME, exeFileToDebug.getExePath());

							break;

						}

					}

				}

			}

		}

	}

	private static List<ExeFileToDebug> getExecutablesForTheProject(ILaunchConfiguration configuration) {

		List<ExeFileToDebug> files = new ArrayList<ExeFileToDebug>();

		try {

			String launchExeName = AbstractCLaunchDelegate.getProgramName(configuration);

			IPath launchExePath = new Path(new File(launchExeName).getCanonicalPath()).removeLastSegments(1);

			ICarbideProjectInfo cpi = CarbideBuilderPlugin.getBuildManager().getProjectInfo(NokiaAbstractLaunchDelegate.getProject(configuration));

			if (cpi != null)

			{					

				List<ICarbideBuildConfiguration> buildConfigList = cpi.getBuildConfigurations();

				for (ICarbideBuildConfiguration currConfig : buildConfigList){

					for (IPath mmp : EpocEngineHelper.getMMPFilesForBuildConfiguration(currConfig)) {

						IPath hp = EpocEngineHelper.getHostPathForExecutable(currConfig, mmp);

						if (hp != null) {

							try {

								if (launchExePath.isPrefixOf(new Path(hp.toFile().getCanonicalPath())))

									files.add(new ExeFileToDebug(hp.toFile().getCanonicalPath(), true));

							} catch (IOException e) {}

						}

					}

				}

			}

		} catch (CoreException e1) { } catch (IOException e) { }

		return files;

	}

	static public List<ExeFileToDebug> getExecutablesToTarget(int targetingRule, ILaunchConfiguration launchConfig, IProgressMonitor monitor) {

		List<ExeFileToDebug> files = new ArrayList<ExeFileToDebug>();

		if (targetingRule == SettingsData.LCS_ExeTargetingRule_All) {

			files = getExecutablesForTheProject(launchConfig);

		}

		if (targetingRule == SettingsData.LCS_ExeTargetingRule_AllInProject) {

			files = getExecutablesForTheProject(launchConfig);

		}

		if (targetingRule == SettingsData.LCS_ExeTargetingRule_AllInSDK) {

			files = getExecutablesForTheSDK(launchConfig);

		}

		if (targetingRule == SettingsData.LCS_ExeTargetingRule_ExeList) {

			files = getExecutablesInConfiguration(launchConfig);

		}

		return files;

	}

	protected void changeTargetingRule(final int targetingRule) {

		this.targetingRule = targetingRule;

		final ExecutablesTab exeTab = this;

		if (configuration != null && !exeTab.isDisposed()) {

			UIJob refreshJob = new UIJob(Messages.getString("ExecutablesTab.12")) { //$NON-NLS-1$

				@Override

				public IStatus runInUIThread(IProgressMonitor monitor) {

					if (!exeTab.isDisposed()){

						executablesToTarget = getExecutablesToTarget(targetingRule, configuration, monitor);

						executablesBlock.setFiles(executablesToTarget);

						boolean enableSelectExe = targetingRule == SettingsData.LCS_ExeTargetingRule_ExeList;

						executablesBlock.setEnabled(enableSelectExe);

						addButton.setEnabled(enableSelectExe);

						selectAllButton.setEnabled(enableSelectExe);

						unselectAllButton.setEnabled(enableSelectExe);						

					}

					return Status.OK_STATUS;

				}

			};

			refreshJob.schedule();

		}

	}

	protected boolean isDisposed() {

		return disposed;

	}

	private static List<ExeFileToDebug> getExecutablesInConfiguration(ILaunchConfiguration configuration)

	{

		List<ExeFileToDebug> files = getExecutablesForTheSDK(configuration);

		String filesString;

		try {

			filesString = configuration.getAttribute(PreferenceConstants.J_PN_ExecutablesToDebug, ""); //$NON-NLS-1$

			if (filesString.length() > 0) {

				StringTokenizer tokenizer = new StringTokenizer(filesString, ","); //$NON-NLS-1$

				while (tokenizer.hasMoreTokens()) {

					String exe = tokenizer.nextToken();

					String enabled = tokenizer.nextToken();

					for (ExeFileToDebug exeFileToDebug : files) {

						if (exeFileToDebug.getExePath().equalsIgnoreCase(exe))

						{

							exeFileToDebug.setEnabled(enabled.equals("1")); //$NON-NLS-1$

							break;

						}

					}

				}

			}

		} catch (CoreException e) { } //$NON-NLS-1$

		return files;

	}

	private static List<ExeFileToDebug> getExecutablesForTheSDK(ILaunchConfiguration configuration) {

		List<ExeFileToDebug> files = new ArrayList<ExeFileToDebug>();

		try {

			String launchExeName = AbstractCLaunchDelegate.getProgramName(configuration);

			if (launchExeName == null)

				return Collections.emptyList();

			// ignore 'urel', 'udeb' and 'lib' directories when getting the binaries for the same target

			// removeLastSegments(2) will strip the filename and 'urel', 'udeb' or 'lib'

			IPath launchExeTargetPath = new Path(new File(launchExeName).getCanonicalPath()).removeLastSegments(2); 

				IPath exePath = executable.getPath();

				if (launchExeTargetPath.isPrefixOf(exePath))

						files.add(new ExeFileToDebug(exePath.toOSString(), true));

			}

		} catch (Exception e) {

			LaunchPlugin.log(e);

		}

		// now add the ones for the project as well since they may not be built yet and therefore

		// not returned by the executables manager.

		for (ExeFileToDebug exe : getExecutablesForTheProject(configuration)) {

			if (!files.contains(exe)) {

				files.add(exe);

			}

		}

		return files;

	}

	/* (non-Javadoc)

	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#getName()

	 */

	public String getName() {

		return Messages.getString("ExecutablesTab.Title"); //$NON-NLS-1$

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#getImage()

	 */

	public Image getImage() {

		return LaunchImages.get(LaunchImages.IMG_EXECUTABLES_TAB);

	}

	public void dataChanged() {

		updateLaunchConfigurationDialog();

	}

	@Override

	public void activated(ILaunchConfigurationWorkingCopy workingCopy) {

		super.activated(workingCopy);

		// forces page to get focus so that help works without having to select some control first.

		getControl().setFocus();

	}

	public ILaunchConfiguration getLaunchConfiguration() {

		return configuration;

	}

	public void executablesChanged(List<Executable> executables) {

	}

	public void executablesListChanged() {

		changeTargetingRule(targetingRule);

	}

}