/*******************************************************************************
 * Copyright (c) 2004, 2010 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.wst.css.ui.internal.preferences.ui;

import org.eclipse.core.runtime.Preferences;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
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.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Spinner;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.PreferenceLinkArea;
import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer;
import org.eclipse.wst.css.core.internal.CSSCorePlugin;
import org.eclipse.wst.css.core.internal.preferences.CSSCorePreferenceNames;
import org.eclipse.wst.css.ui.internal.CSSUIMessages;
import org.eclipse.wst.css.ui.internal.CSSUIPlugin;
import org.eclipse.wst.css.ui.internal.editor.IHelpContextIds;
import org.eclipse.wst.sse.ui.internal.preferences.ui.AbstractPreferencePage;

/**
 */
public class CSSSourcePreferencePage extends AbstractPreferencePage {
	// Content Assist
	protected Button fAutoPropose;
	protected Label fAutoProposeLabel;

	protected Text fAutoProposeText;
	protected Button fClearAllBlankLines;
	protected Button fIdentLower;
	// case of output character
	// case of identifier
	protected Button fIdentUpper;
	private Spinner fIndentationSize;
	private Button fIndentUsingSpaces;
	
	private Button fIndentUsingTabs;
	// Formatting
	protected Label fLineWidthLabel;
	
	protected Text fLineWidthText;
	// prohibit wrapping if style attribute
	protected Button fNowrapAttr;
	// one property per one line
	protected Button fPropertyPerLine;
	protected Button fPropNameLower;

	// case of property name
	protected Button fPropNameUpper;
	protected Button fPropValueLower;
	// case of property value
	protected Button fPropValueUpper;

	// Selector case
	protected Button fSelectorUpper;
	protected Button fSelectorLower;

	protected Button fSplitMultiAttrs;
	private final int MAX_INDENTATION_SIZE = 16;
	private final int MIN_INDENTATION_SIZE = 0;


	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)
	 */
	protected Control createContents(Composite parent) {
		final Composite composite = super.createComposite(parent, 1);
		PlatformUI.getWorkbench().getHelpSystem().setHelp(composite, IHelpContextIds.CSS_PREFWEBX_SOURCE_HELPID);

		new PreferenceLinkArea(composite, SWT.WRAP | SWT.MULTI, "org.eclipse.wst.sse.ui.preferences.editor", CSSUIMessages._UI_STRUCTURED_TEXT_EDITOR_PREFS_LINK,//$NON-NLS-1$
					(IWorkbenchPreferenceContainer) getContainer(), null).getControl().setLayoutData(GridDataFactory.fillDefaults().hint(150, SWT.DEFAULT).create());
		new Label(composite, SWT.NONE).setLayoutData(GridDataFactory.swtDefaults().create());

		createContentsForFormattingGroup(composite);
		createContentsForContentAssistGroup(composite);
		setSize(composite);
		loadPreferences();

		return composite;
	}

	private void createContentsForContentAssistGroup(Composite parent) {
		// not content assist, but preferred case
		Group caseGroup = createGroup(parent, 4);
		caseGroup.setText(CSSUIMessages.PrefsLabel_CaseGroup);

		// use group for radio buttons so that associated label is read
		Group identGroup = createGroup(caseGroup, 1);
		identGroup.setText(CSSUIMessages.PrefsLabel_CaseIdent);
		fIdentUpper = createRadioButton(identGroup, CSSUIMessages.PrefsLabel_CaseIdentUpper);
		fIdentLower = createRadioButton(identGroup, CSSUIMessages.PrefsLabel_CaseIdentLower);

		// use group for radio buttons so that associated label is read
		Group selectorGroup = createGroup(caseGroup, 1);
		selectorGroup.setText(CSSUIMessages.PrefsLabel_SelectorTagName);
		fSelectorUpper = createRadioButton(selectorGroup, CSSUIMessages.PrefsLabel_SelectorTagNameUpper);
		fSelectorLower = createRadioButton(selectorGroup, CSSUIMessages.PrefsLabel_SelectorTagNameLower);

		// use group for radio buttons so that associated label is read
		Group propNameGroup = createGroup(caseGroup, 1);
		propNameGroup.setText(CSSUIMessages.PrefsLabel_CasePropName);
		fPropNameUpper = createRadioButton(propNameGroup, CSSUIMessages.PrefsLabel_CasePropNameUpper);
		fPropNameLower = createRadioButton(propNameGroup, CSSUIMessages.PrefsLabel_CasePropNameLower);

		// use group for radio buttons so that associated label is read
		Group propValueGroup = createGroup(caseGroup, 1);
		propValueGroup.setText(CSSUIMessages.PrefsLabel_CasePropValue);
		fPropValueUpper = createRadioButton(propValueGroup, CSSUIMessages.PrefsLabel_CasePropValueUpper);
		fPropValueLower = createRadioButton(propValueGroup, CSSUIMessages.PrefsLabel_CasePropValueLower);
	}

	private void createContentsForFormattingGroup(Composite parent) {
		Group formattingGroup = createGroup(parent, 2);
		formattingGroup.setText(CSSUIMessages.Formatting_UI_);

		fLineWidthLabel = createLabel(formattingGroup, CSSUIMessages.Line_width__UI_);
		fLineWidthText = new Text(formattingGroup, SWT.SINGLE | SWT.BORDER);
		GridData gData = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING | GridData.BEGINNING);
		gData.widthHint = 25;
		fLineWidthText.setLayoutData(gData);
		fLineWidthText.addModifyListener(this);

		fPropertyPerLine = createCheckBox(formattingGroup, CSSUIMessages.PrefsLabel_WrappingInsertLineBreak);
		((GridData) fPropertyPerLine.getLayoutData()).horizontalSpan = 2;

		fNowrapAttr = createCheckBox(formattingGroup, CSSUIMessages.PrefsLabel_WrappingWithoutAttr);
		((GridData) fNowrapAttr.getLayoutData()).horizontalSpan = 2;

		// [269224] - Place the indent controls in their own composite for proper tab ordering
		Composite indentComposite = createComposite(formattingGroup, 1);
		((GridData) indentComposite.getLayoutData()).horizontalSpan = 2;
		((GridLayout) indentComposite.getLayout()).marginWidth = 0;
		((GridLayout) indentComposite.getLayout()).marginHeight = 0;

		fIndentUsingTabs = createRadioButton(indentComposite, CSSUIMessages.Indent_using_tabs_);
		((GridData) fIndentUsingTabs.getLayoutData()).horizontalSpan = 1;
		fIndentUsingSpaces = createRadioButton(indentComposite, CSSUIMessages.Indent_using_spaces);
		((GridData) fIndentUsingSpaces.getLayoutData()).horizontalSpan = 1;

		createLabel(formattingGroup, CSSUIMessages.Indentation_size);
		fIndentationSize = new Spinner(formattingGroup, SWT.READ_ONLY | SWT.BORDER);
		GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
		fIndentationSize.setLayoutData(gd);
		fIndentationSize.setToolTipText(CSSUIMessages.Indentation_size_tip);
		fIndentationSize.setMinimum(MIN_INDENTATION_SIZE);
		fIndentationSize.setMaximum(MAX_INDENTATION_SIZE);
		fIndentationSize.setIncrement(1);
		fIndentationSize.setPageIncrement(4);
		fIndentationSize.addModifyListener(this);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.preference.PreferencePage#doGetPreferenceStore()
	 */
	protected IPreferenceStore doGetPreferenceStore() {
		return CSSUIPlugin.getDefault().getPreferenceStore();
	}

	private void doSavePreferenceStore() {
		CSSUIPlugin.getDefault().savePluginPreferences();
		CSSCorePlugin.getDefault().savePluginPreferences(); // model
	}
	
	protected Preferences getModelPreferences() {
		return CSSCorePlugin.getDefault().getPluginPreferences();
	}

	protected void initializeValues() {
		initializeValuesForFormattingGroup();
		initializeValuesForContentAssistGroup();
	}
	
	private void initializeValuesForContentAssistGroup() {
		// not content assist, but preferred case
		Preferences prefs = getModelPreferences();
		fIdentUpper.setSelection(prefs.getInt(CSSCorePreferenceNames.CASE_IDENTIFIER) == CSSCorePreferenceNames.UPPER);
		fIdentLower.setSelection(prefs.getInt(CSSCorePreferenceNames.CASE_IDENTIFIER) == CSSCorePreferenceNames.LOWER);
		fSelectorUpper.setSelection(prefs.getInt(CSSCorePreferenceNames.CASE_SELECTOR) == CSSCorePreferenceNames.UPPER);
		fSelectorLower.setSelection(prefs.getInt(CSSCorePreferenceNames.CASE_SELECTOR) == CSSCorePreferenceNames.LOWER);
		fPropNameUpper.setSelection(prefs.getInt(CSSCorePreferenceNames.CASE_PROPERTY_NAME) == CSSCorePreferenceNames.UPPER);
		fPropNameLower.setSelection(prefs.getInt(CSSCorePreferenceNames.CASE_PROPERTY_NAME) == CSSCorePreferenceNames.LOWER);
		fPropValueUpper.setSelection(prefs.getInt(CSSCorePreferenceNames.CASE_PROPERTY_VALUE) == CSSCorePreferenceNames.UPPER);
		fPropValueLower.setSelection(prefs.getInt(CSSCorePreferenceNames.CASE_PROPERTY_VALUE) == CSSCorePreferenceNames.LOWER);
	}

	private void initializeValuesForFormattingGroup() {
		// Formatting
		Preferences prefs = getModelPreferences();
		fLineWidthText.setText(prefs.getString(CSSCorePreferenceNames.LINE_WIDTH));
		fPropertyPerLine.setSelection(prefs.getBoolean(CSSCorePreferenceNames.WRAPPING_ONE_PER_LINE));
		fNowrapAttr.setSelection(prefs.getBoolean(CSSCorePreferenceNames.WRAPPING_PROHIBIT_WRAP_ON_ATTR));
		
		if (CSSCorePreferenceNames.TAB.equals(getModelPreferences().getString(CSSCorePreferenceNames.INDENTATION_CHAR))) {
			fIndentUsingTabs.setSelection(true);
			fIndentUsingSpaces.setSelection(false);
		} else {
			fIndentUsingSpaces.setSelection(true);
			fIndentUsingTabs.setSelection(false);
		}
			
		fIndentationSize.setSelection(getModelPreferences().getInt(CSSCorePreferenceNames.INDENTATION_SIZE));
	}
	
	protected void performDefaults() {
		performDefaultsForFormattingGroup();
		performDefaultsForContentAssistGroup();

		validateValues();
		enableValues();

		super.performDefaults();
	}
	
	private void performDefaultsForContentAssistGroup() {
		// not content assist, but preferred case
		Preferences prefs = getModelPreferences();
		fIdentUpper.setSelection(prefs.getDefaultInt(CSSCorePreferenceNames.CASE_IDENTIFIER) == CSSCorePreferenceNames.UPPER);
		fIdentLower.setSelection(prefs.getDefaultInt(CSSCorePreferenceNames.CASE_IDENTIFIER) == CSSCorePreferenceNames.LOWER);
		fSelectorUpper.setSelection(prefs.getDefaultInt(CSSCorePreferenceNames.CASE_SELECTOR) == CSSCorePreferenceNames.UPPER);
		fSelectorLower.setSelection(prefs.getDefaultInt(CSSCorePreferenceNames.CASE_SELECTOR) == CSSCorePreferenceNames.LOWER);
		fPropNameUpper.setSelection(prefs.getDefaultInt(CSSCorePreferenceNames.CASE_PROPERTY_NAME) == CSSCorePreferenceNames.UPPER);
		fPropNameLower.setSelection(prefs.getDefaultInt(CSSCorePreferenceNames.CASE_PROPERTY_NAME) == CSSCorePreferenceNames.LOWER);
		fPropValueUpper.setSelection(prefs.getDefaultInt(CSSCorePreferenceNames.CASE_PROPERTY_VALUE) == CSSCorePreferenceNames.UPPER);
		fPropValueLower.setSelection(prefs.getDefaultInt(CSSCorePreferenceNames.CASE_PROPERTY_VALUE) == CSSCorePreferenceNames.LOWER);
	}

	private void performDefaultsForFormattingGroup() {
		// Formatting
		Preferences prefs = getModelPreferences();
		fLineWidthText.setText(prefs.getDefaultString(CSSCorePreferenceNames.LINE_WIDTH));
		fPropertyPerLine.setSelection(prefs.getDefaultBoolean(CSSCorePreferenceNames.WRAPPING_ONE_PER_LINE));
		fNowrapAttr.setSelection(prefs.getDefaultBoolean(CSSCorePreferenceNames.WRAPPING_PROHIBIT_WRAP_ON_ATTR));
		
		if (CSSCorePreferenceNames.TAB.equals(getModelPreferences().getDefaultString(CSSCorePreferenceNames.INDENTATION_CHAR))) {
			fIndentUsingTabs.setSelection(true);
			fIndentUsingSpaces.setSelection(false);
		} else {
			fIndentUsingSpaces.setSelection(true);
			fIndentUsingTabs.setSelection(false);
		}		
		fIndentationSize.setSelection(getModelPreferences().getDefaultInt(CSSCorePreferenceNames.INDENTATION_SIZE));
	}

	public boolean performOk() {
		boolean result = super.performOk();

		doSavePreferenceStore();

		return result;
	}

	protected void storeValues() {
		storeValuesForFormattingGroup();
		storeValuesForContentAssistGroup();
	}

	private void storeValuesForContentAssistGroup() {
		// not content assist, but preferred case
		Preferences prefs = getModelPreferences();
		prefs.setValue(CSSCorePreferenceNames.CASE_IDENTIFIER, (fIdentUpper.getSelection()) ? CSSCorePreferenceNames.UPPER : CSSCorePreferenceNames.LOWER);
		prefs.setValue(CSSCorePreferenceNames.CASE_SELECTOR, (fSelectorUpper.getSelection()) ? CSSCorePreferenceNames.UPPER : CSSCorePreferenceNames.LOWER);
		prefs.setValue(CSSCorePreferenceNames.CASE_PROPERTY_NAME, (fPropNameUpper.getSelection()) ? CSSCorePreferenceNames.UPPER : CSSCorePreferenceNames.LOWER);
		prefs.setValue(CSSCorePreferenceNames.CASE_PROPERTY_VALUE, (fPropValueUpper.getSelection()) ? CSSCorePreferenceNames.UPPER : CSSCorePreferenceNames.LOWER);
	}
	private void storeValuesForFormattingGroup() {
		// Formatting
		Preferences prefs = getModelPreferences();
		prefs.setValue(CSSCorePreferenceNames.LINE_WIDTH, fLineWidthText.getText());
		prefs.setValue(CSSCorePreferenceNames.WRAPPING_ONE_PER_LINE, fPropertyPerLine.getSelection());
		prefs.setValue(CSSCorePreferenceNames.WRAPPING_PROHIBIT_WRAP_ON_ATTR, fNowrapAttr.getSelection());
		
		if (fIndentUsingTabs.getSelection()) {
			getModelPreferences().setValue(CSSCorePreferenceNames.INDENTATION_CHAR, CSSCorePreferenceNames.TAB);
		} else {
			getModelPreferences().setValue(CSSCorePreferenceNames.INDENTATION_CHAR, CSSCorePreferenceNames.SPACE);
		}
		getModelPreferences().setValue(CSSCorePreferenceNames.INDENTATION_SIZE, fIndentationSize.getSelection());
	}
	
	protected void validateValues() {
		boolean isError = false;
		String widthText = null;

		if (fLineWidthText != null) {
			try {
				widthText = fLineWidthText.getText();
				int formattingLineWidth = Integer.parseInt(widthText);
				if ((formattingLineWidth < WIDTH_VALIDATION_LOWER_LIMIT) || (formattingLineWidth > WIDTH_VALIDATION_UPPER_LIMIT)) {
					throw new NumberFormatException();
				}
			}
			catch (NumberFormatException nfexc) {
				setInvalidInputMessage(widthText);
				setValid(false);
				isError = true;
			}
		}

		if (!isError) {
			setErrorMessage(null);
			setValid(true);
		}
	}
}