/*******************************************************************************
 * Copyright (c) 2002 IBM Corporation and others.
 * All rights reserved.   This program and the accompanying materials
 * are made available under the terms of the Common Public License v0.5
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v05.html
 * 
 * Contributors:
 * IBM - Initial API and implementation
 ******************************************************************************/
package org.eclipse.team.internal.ui;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.CheckStateChangedEvent;
import org.eclipse.jface.viewers.CheckboxTableViewer;
import org.eclipse.jface.viewers.ICheckStateListener;
import org.eclipse.jface.viewers.TableLayout;
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.Event;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.Text;
import org.eclipse.team.core.RepositoryProvider;
import org.eclipse.ui.help.WorkbenchHelp;
import org.eclipse.ui.model.WorkbenchContentProvider;
import org.eclipse.ui.model.WorkbenchLabelProvider;

public class ExportProjectSetMainPage extends TeamWizardPage {
	Text fileText;
	String file = ""; //$NON-NLS-1$
	Button browseButton;
	List selectedProjects = new ArrayList();

	CheckboxTableViewer tableViewer;
	Table table;

	class ProjectContentProvider extends WorkbenchContentProvider {
		public Object[] getElements(Object element) {
			if (element instanceof IProject[]) return (IProject[]) element;
			return null;
		}
	};

	public ExportProjectSetMainPage(String pageName, String title, ImageDescriptor titleImage) {
		super(pageName, title, titleImage);
	}

	/*
	 * @see IDialogPage#createControl(Composite)
	 */
	public void createControl(Composite parent) {
		Composite composite = createComposite(parent, 1);
		initializeDialogUnits(composite);

		// set F1 help
		WorkbenchHelp.setHelp(composite, IHelpContextIds.EXPORT_PROJECT_SET_PAGE);
				
		createLabel(composite, Policy.bind("ExportProjectSetMainPage.Select_the_projects_to_include_in_the_project_set__2")); //$NON-NLS-1$

		table = new Table(composite, SWT.CHECK | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
		tableViewer = new CheckboxTableViewer(table);
		table.setLayout(new TableLayout());
		GridData data = new GridData(GridData.FILL_BOTH);
		data.heightHint = 300;
		table.setLayoutData(data);
		tableViewer.setContentProvider(new ProjectContentProvider());
		tableViewer.setLabelProvider(new WorkbenchLabelProvider());
		tableViewer.addCheckStateListener(new ICheckStateListener() {
			public void checkStateChanged(CheckStateChangedEvent event) {
				IProject project = (IProject)event.getElement();
				if (event.getChecked()) {
					selectedProjects.add(project);
				} else {
					selectedProjects.remove(project);
				}
				updateEnablement();
			}
		});
		createLabel(composite, Policy.bind("ExportProjectSetMainPage.Project_Set_File_Name__3")); //$NON-NLS-1$

		Composite inner = new Composite(composite, SWT.NULL);
		inner.setLayoutData(new GridData(GridData.FILL_BOTH));
		GridLayout layout = new GridLayout();
		layout.numColumns = 3;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		inner.setLayout(layout);

		createLabel(inner, Policy.bind("ExportProjectSetMainPage.&File_name__1")); //$NON-NLS-1$
		fileText = createTextField(inner);
		if (file != null) fileText.setText(file);
		fileText.addListener(SWT.Modify, new Listener() {
			public void handleEvent(Event event) {
				file = fileText.getText();
				updateEnablement();
			}
		});

		browseButton = new Button(inner, SWT.PUSH);
		browseButton.setText(Policy.bind("ExportProjectSetMainPage.Browse_4")); //$NON-NLS-1$
		data = new GridData();
		data.horizontalAlignment = GridData.FILL;
		data.heightHint = convertVerticalDLUsToPixels(IDialogConstants.BUTTON_HEIGHT);
		int widthHint = convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH);
		data.widthHint = Math.max(widthHint, browseButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
		browseButton.setLayoutData(data);
		browseButton.addListener(SWT.Selection, new Listener() {
			public void handleEvent(Event event) {
				FileDialog d = new FileDialog(getShell(), SWT.SAVE);
				d.setFilterExtensions(new String[] {"*.psf"}); //$NON-NLS-1$
				d.setFilterNames(new String[] {Policy.bind("ExportProjectSetMainPage.Project_Set_Files_3")}); //$NON-NLS-1$
				d.setFileName(Policy.bind("ExportProjectSetMainPage.default")); //$NON-NLS-1$
				d.setFilterPath(new File(".").getAbsolutePath()); //$NON-NLS-1$
				String f = d.open();
				if (f != null) {
					fileText.setText(f);
					file = f;
				}
			}
		});

		initializeProjects();
		setControl(composite);
		updateEnablement();
	}

	private void initializeProjects() {
		List projectList = new ArrayList();
		IProject[] workspaceProjects = ResourcesPlugin.getWorkspace().getRoot().getProjects();
		for (int i = 0; i < workspaceProjects.length; i++) {
			if (RepositoryProvider.getProvider(workspaceProjects[i]) != null) {
				projectList.add(workspaceProjects[i]);
			}
		}
		tableViewer.setInput((IProject[]) projectList.toArray(new IProject[projectList.size()]));
		// Check any necessary projects
		if (selectedProjects != null) {
			tableViewer.setCheckedElements((IProject[])selectedProjects.toArray(new IProject[selectedProjects.size()]));
		}
	}
	private void updateEnablement() {
		boolean complete;
		if (selectedProjects.size() == 0) {
			setMessage(null);
			complete = false;
		} else if (file.length() == 0) {
			setMessage(null);
			complete = false;
		} else {
			File f = new File(file);
			if (f.isDirectory()) {
				setMessage(Policy.bind("ExportProjectSetMainPage.You_have_specified_a_folder_5"), ERROR); //$NON-NLS-1$
				complete = false;
			} else {
				complete = true;
			}
		}
		if (complete) {
			setMessage(null);
		}
		setPageComplete(complete);
	}

	public String getFileName() {
		return file;
	}
	public void setFileName(String file) {
		if (file != null) {
			this.file = file;
		}
	}
	
	public IProject[] getSelectedProjects() {
		return (IProject[])selectedProjects.toArray(new IProject[selectedProjects.size()]);
	}
	public void setSelectedProjects(IProject[] selectedProjects) {
		this.selectedProjects.addAll(Arrays.asList(selectedProjects));
	}
	public void setVisible(boolean visible) {
		super.setVisible(visible);
		if (visible) {
			fileText.setFocus();
		}
	}
}