package org.symbian.tools.tmw.internal.ui.wizard;

import java.io.File;

import java.net.URI;

import org.eclipse.core.databinding.DataBindingContext;

import org.eclipse.core.databinding.beans.BeansObservables;

import org.eclipse.core.databinding.observable.value.IObservableValue;

import org.eclipse.core.databinding.validation.IValidator;

import org.eclipse.core.resources.IProject;

import org.eclipse.core.resources.IResource;

import org.eclipse.core.resources.IWorkspace;

import org.eclipse.core.resources.ResourcesPlugin;

import org.eclipse.core.runtime.IPath;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Path;

import org.eclipse.core.runtime.Status;

import org.eclipse.jface.databinding.viewers.IViewerObservableValue;

import org.eclipse.jface.databinding.viewers.ViewersObservables;

import org.eclipse.jface.databinding.wizard.WizardPageSupport;

import org.eclipse.jface.dialogs.Dialog;

import org.eclipse.jface.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.ComboViewer;

import org.eclipse.jface.viewers.LabelProvider;

import org.eclipse.jface.wizard.WizardPage;

import org.eclipse.swt.SWT;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Event;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Listener;

import org.eclipse.swt.widgets.Text;

import org.eclipse.ui.PlatformUI;

import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;

import org.eclipse.ui.internal.ide.IIDEHelpContextIds;

import org.eclipse.ui.internal.ide.dialogs.ProjectContentsLocationArea;

import org.eclipse.ui.internal.ide.dialogs.ProjectContentsLocationArea.IErrorMessageReporter;

import org.symbian.tools.tmw.core.TMWCore;

import org.symbian.tools.tmw.core.runtimes.IMobileWebRuntime;

import org.symbian.tools.tmw.ui.TMWCoreUI;

@SuppressWarnings("restriction")

public final class NewApplicationDetailsWizardPage extends WizardPage {

    public static final class ProjectNameValidator implements IValidator {

        public IStatus validate(Object value) {

            IWorkspace workspace = ResourcesPlugin.getWorkspace();

            String projectFieldContents = (String) value;

            IStatus nameStatus = workspace.validateName(projectFieldContents, IResource.PROJECT);

            if (!nameStatus.isOK()) {

                return nameStatus;

            }

            IProject handle = ResourcesPlugin.getWorkspace().getRoot().getProject(projectFieldContents);

            if (handle.exists()) {

                return new Status(IStatus.ERROR, TMWCoreUI.PLUGIN_ID,

                        IDEWorkbenchMessages.WizardNewProjectCreationPage_projectExistsMessage);

            }

            return Status.OK_STATUS;

        }

    }

    private ProjectContentsLocationArea locationArea;

    private final DataBindingContext bindingContext;

    private final WizardContext context;

    public NewApplicationDetailsWizardPage(WizardContext context, DataBindingContext bindingContext) {

        setImageDescriptor(null);

        setTitle("Application Details");

        setDescription("Specify application details");

        this.context = context;

        this.bindingContext = bindingContext;

    }

    public void createControl(Composite parent) {

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

        initializeDialogUnits(parent);

        PlatformUI.getWorkbench().getHelpSystem().setHelp(root, IIDEHelpContextIds.NEW_PROJECT_WIZARD_PAGE);

        WizardPageSupport.create(this, bindingContext);

        root.setLayout(new GridLayout(2, false));

        createProjectNameGroup(root);

        createLabel(root, "");

        createLabel(root, "");

        createLabel(root, "Mobile Runtime:");

        ComboViewer viewer = new ComboViewer(root);

        viewer.setContentProvider(new ArrayContentProvider());

        viewer.setLabelProvider(new LabelProvider() {

            @Override

            public String getText(Object element) {

                return ((IMobileWebRuntime) element).getName();

            }

        });

        viewer.setInput(TMWCore.getRuntimesManager().getAllRuntimes());

        final IViewerObservableValue observeSelection = ViewersObservables.observeSingleSelection(viewer);

        final IObservableValue observableValue = BeansObservables.observeValue(context, WizardContext.RUNTIME);

        bindingContext.bindValue(observeSelection, observableValue);

        createLabel(root, "");

        createLabel(root, "");

        createLabel(root, "Application identifier:");

        context.createText(root, WizardContext.WIDGET_ID, "applicatoin identifier", bindingContext, null,

                new RegexpValidator("[\\w]*(\\.\\w[\\w]*)*", "{0} is not a valid applicatoin ID", true));

        createLabel(root, "");

        createLabel(root, "This id should be unique for successful installation of application on the device");

        createLabel(root, "");

        createLabel(root, "");

        createLabel(root, "Application name:");

        context.createText(root, WizardContext.WIDGET_NAME, "application name", bindingContext, null,

                new RegexpValidator("[^\\w\\. ]", "Application name cannot contain {0} character", false));

        createLabel(root, "");

        createLabel(root, "This will be the application display name on the device");

        Composite composite = new Composite(root, SWT.NONE);

        GridLayout gridLayout = new GridLayout(1, false);

        gridLayout.marginWidth = 0;

        composite.setLayout(gridLayout);

        composite.setLayoutData(new GridData(GridData.FILL, GridData.BEGINNING, true, true, 2, 1));

        locationArea = new ProjectContentsLocationArea(getErrorReporter(), composite);

        if (context.getProjectName() != null && context.getProjectName().trim().length() > 0) {

            locationArea.updateProjectName(context.getProjectName());

        }

        // Scale the button based on the rest of the dialog

        setButtonLayoutData(locationArea.getBrowseButton());

        setPageComplete(validatePage());

        // Show description on opening

        setErrorMessage(null);

        setMessage(null);

        setControl(root);

        Dialog.applyDialogFont(root);

    }

    private void createLabel(Composite root, String string) {

        new Label(root, SWT.NONE).setText(string);

    }

    /**

     * Creates the project name specification controls.

     *

     * @param parent

     *            the parent composite

     */

    private void createProjectNameGroup(Composite parent) {

        // new project label

        Label projectLabel = new Label(parent, SWT.NONE);

        projectLabel.setText(IDEWorkbenchMessages.WizardNewProjectCreationPage_nameLabel);

        projectLabel.setFont(parent.getFont());

        Text projectNameField = context.createText(parent, WizardContext.PROJECT_NAME, "project name", bindingContext,

                null, new ProjectNameValidator());

        projectNameField.setFont(parent.getFont());

        projectNameField.addListener(SWT.Modify, nameModifyListener);

    }

    /**

     * Returns the current project location path as entered by the user, or its

     * anticipated initial value. Note that if the default has been returned the

     * path in a project description used to create a project should not be set.

     *

     * @return the project location path or its anticipated initial value.

     */

    public IPath getLocationPath() {

        return locationArea.isDefault() ? null : new Path(locationArea.getProjectLocation());

    }

    /**

     * /** Returns the current project location URI as entered by the user, or

     * <code>null</code> if a valid project location has not been entered.

     *

     * @return the project location URI, or <code>null</code>

     * @since 3.2

     */

    public URI getLocationURI() {

        return locationArea.getProjectLocationURI();

    }

    private final Listener nameModifyListener = new Listener() {

        public void handleEvent(Event e) {

            if (isPageComplete()) {

                setLocationForSelection();

                boolean valid = validatePage();

                setPageComplete(valid);

            }

        }

    };

    /**

     * Get an error reporter for the receiver.

     *

     * @return IErrorMessageReporter

     */

    private IErrorMessageReporter getErrorReporter() {

        return new IErrorMessageReporter() {

            /*

             * (non-Javadoc)

             *

             * @see

             * org.eclipse.ui.internal.ide.dialogs.ProjectContentsLocationArea

             * .IErrorMessageReporter#reportError(java.lang.String)

             */

            public void reportError(String errorMessage, boolean infoOnly) {

                if (infoOnly) {

                    setMessage(errorMessage, IStatus.INFO);

                    setErrorMessage(null);

                } else {

                    setErrorMessage(errorMessage);

                }

                boolean valid = errorMessage == null;

                if (valid) {

                    valid = validatePage();

                }

                setPageComplete(valid);

            }

        };

    }

    /**

     * Set the location to the default location if we are set to useDefaults.

     */

    void setLocationForSelection() {

        locationArea.updateProjectName(context.getProjectName());

    }

    /**

     * Returns whether this page's controls currently all contain valid values.

     *

     * @return <code>true</code> if all controls are valid, and

     *         <code>false</code> if at least one is invalid

     */

    protected boolean validatePage() {

        if (isPageComplete() || context.getProjectName().trim().length() == 0) {

            return false;

        }

        String projectName = context.getProjectName();

        IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject(projectName);

        locationArea.setExistingProject(project);

        String validLocationMessage = locationArea.checkValidLocation();

        if (validLocationMessage != null) { // there is no destination location

                                            // given

            setErrorMessage(validLocationMessage);

            return false;

        }

        File file = new File(locationArea.getProjectLocationURI());

        if (file.isFile()) {

            setErrorMessage(String.format("%s is an existing file", file));

            return false;

        } else if (file.isDirectory() && file.listFiles().length > 0) {

            setErrorMessage(String.format("%s is a non-empty folder", file));

            return false;

        }

        setErrorMessage(null);

        setMessage(null);

        return true;

    }

    /**

     * Returns the useDefaults.

     *

     * @return boolean

     */

    public boolean useDefaults() {

        return locationArea.isDefault();

    }

    @Override

    public void setVisible(boolean visible) {

        // TODO Auto-generated method stub

        super.setVisible(visible);

        setErrorMessage(null);

    }

}