/*******************************************************************************
 * Copyright (c) 2000, 2013 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ant.internal.ui.preferences;

import java.util.ArrayList;

import org.eclipse.ant.internal.ui.IAntUIHelpContextIds;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;

/*
 * The page for setting the Ant editor code assist options.
 */
public class AntCodeAssistPreferencePage extends AbstractAntEditorPreferencePage {

	private Control fAutoInsertDelayText;
	private Control fAutoInsertTriggerText;
	private Label fAutoInsertDelayLabel;
	private Label fAutoInsertTriggerLabel;

	@Override
	protected OverlayPreferenceStore createOverlayStore() {

		ArrayList<OverlayPreferenceStore.OverlayKey> overlayKeys = new ArrayList<>();
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, AntEditorPreferenceConstants.CODEASSIST_AUTOACTIVATION));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.INT, AntEditorPreferenceConstants.CODEASSIST_AUTOACTIVATION_DELAY));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, AntEditorPreferenceConstants.CODEASSIST_AUTOINSERT));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, AntEditorPreferenceConstants.CODEASSIST_USER_DEFINED_TASKS));
		overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.STRING, AntEditorPreferenceConstants.CODEASSIST_AUTOACTIVATION_TRIGGERS));

		OverlayPreferenceStore.OverlayKey[] keys = new OverlayPreferenceStore.OverlayKey[overlayKeys.size()];
		overlayKeys.toArray(keys);
		return new OverlayPreferenceStore(getPreferenceStore(), keys);
	}

	private Control createContentAssistPage(Composite parent) {
		Font font = parent.getFont();
		Composite contentAssistComposite = new Composite(parent, SWT.NULL);
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		contentAssistComposite.setLayout(layout);
		contentAssistComposite.setFont(font);

		String text = AntPreferencesMessages.AntCodeAssistPreferencePage_Insert;
		addCheckBox(contentAssistComposite, text, AntEditorPreferenceConstants.CODEASSIST_AUTOINSERT, 0);

		text = AntPreferencesMessages.AntCodeAssistPreferencePage_0;
		addCheckBox(contentAssistComposite, text, AntEditorPreferenceConstants.CODEASSIST_USER_DEFINED_TASKS, 0);

		text = AntPreferencesMessages.AntCodeAssistPreferencePage__Enable_auto_activation_2;
		final Button autoactivation = addCheckBox(contentAssistComposite, text, AntEditorPreferenceConstants.CODEASSIST_AUTOACTIVATION, 0);
		autoactivation.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				updateAutoactivationControls();
			}
		});

		Control[] labelledTextField;
		text = AntPreferencesMessages.AntCodeAssistPreferencePage_Auto_activation__delay__3;
		String[] errorMessages = new String[] { AntPreferencesMessages.AntCodeAssistPreferencePage_empty_input_auto_activation,
				AntPreferencesMessages.AntCodeAssistPreferencePage_invalid_input_auto_activation };
		labelledTextField = addLabelledTextField(contentAssistComposite, text, AntEditorPreferenceConstants.CODEASSIST_AUTOACTIVATION_DELAY, 4, 20, errorMessages);
		fAutoInsertDelayLabel = getLabelControl(labelledTextField);
		fAutoInsertDelayText = getTextControl(labelledTextField);

		text = AntPreferencesMessages.AntCodeAssistPreferencePage_Auto_activation_tri_ggers__4;
		labelledTextField = addLabelledTextField(contentAssistComposite, text, AntEditorPreferenceConstants.CODEASSIST_AUTOACTIVATION_TRIGGERS, 4, 20, null);
		fAutoInsertTriggerLabel = getLabelControl(labelledTextField);
		fAutoInsertTriggerText = getTextControl(labelledTextField);
		updateAutoactivationControls();
		return contentAssistComposite;
	}

	private void updateAutoactivationControls() {
		boolean autoactivation = getOverlayStore().getBoolean(AntEditorPreferenceConstants.CODEASSIST_AUTOACTIVATION);
		fAutoInsertDelayText.setEnabled(autoactivation);
		fAutoInsertDelayLabel.setEnabled(autoactivation);

		fAutoInsertTriggerText.setEnabled(autoactivation);
		fAutoInsertTriggerLabel.setEnabled(autoactivation);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)
	 */
	@Override
	protected Control createContents(Composite parent) {
		getOverlayStore().load();
		getOverlayStore().start();

		Composite control = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		control.setLayout(layout);
		createContentAssistPage(control);

		initialize();

		applyDialogFont(control);
		return control;
	}

	private void initialize() {
		initializeFields();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ant.internal.ui.preferences.AbstractAntEditorPreferencePage#handleDefaults()
	 */
	@Override
	protected void handleDefaults() {
		updateAutoactivationControls();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ant.internal.ui.preferences.AbstractAntEditorPreferencePage#getHelpContextId()
	 */
	@Override
	protected String getHelpContextId() {
		return IAntUIHelpContextIds.ANT_EDITOR_CONTENTASSIST_PREFERENCE_PAGE;
	}
}