package bndtools.wizards.project;

import org.bndtools.core.ui.icons.Icons;
import org.bndtools.core.ui.wizards.shared.TemplateSelectionWizardPage;
import org.bndtools.templating.Template;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.preference.PreferenceDialog;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.window.Window;
import org.eclipse.jface.wizard.WizardDialog;
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.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Link;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.dialogs.PreferencesUtil;

import aQute.bnd.build.Workspace;
import bndtools.Plugin;
import bndtools.central.Central;
import bndtools.wizards.workspace.WorkspaceSetupWizard;

class ProjectTemplateSelectionWizardPage extends TemplateSelectionWizardPage {

    private Image warningImg = null;

    ProjectTemplateSelectionWizardPage(String pageName, String templateType, Template emptyTemplate) {
        super(pageName, templateType, emptyTemplate);
    }

    @Override
    protected Control createHeaderControl(Composite parent) {
        Composite composite;

        Workspace workspace = Central.getWorkspaceIfPresent();
        if (workspace == null || workspace.isDefaultWorkspace()) {
            composite = new Composite(parent, SWT.NONE);
            GridLayout layout = new GridLayout(2, false);
            layout.marginWidth = 0;
            layout.marginHeight = 0;
            layout.marginBottom = 15;
            layout.verticalSpacing = 15;
            composite.setLayout(layout);

            Label lblWarning = new Label(composite, SWT.NONE);
            warningImg = Icons.desc("warning.big")
                .createImage(parent.getDisplay());
            lblWarning.setImage(warningImg);

            Link link = new Link(composite, SWT.NONE);
            link.setText("WARNING! The bnd workspace has not been configured. <a href=\"#workspace\">Create a workspace first</a> \n or configure a <a href=\"#prefs\">Template Repository</a> in Bndtools Preferences.");
            link.addSelectionListener(new SelectionAdapter() {
                @Override
                public void widgetSelected(SelectionEvent ev) {
                    WizardDialog dialog = (WizardDialog) getContainer();
                    dialog.close();

                    if ("#workspace".equals(ev.text)) {
                        // We are going to open the New Workspace wizard in a new dialog.
                        // If that wizard completes successfully then we can reopen the New Project wizard.

                        WorkspaceSetupWizard workspaceWizard = new WorkspaceSetupWizard();
                        workspaceWizard.init(PlatformUI.getWorkbench(), StructuredSelection.EMPTY);
                        dialog = new WizardDialog(dialog.getShell(), workspaceWizard);

                        if (Window.OK == dialog.open()) {
                            try {
                                NewBndProjectWizard projectWizard = new NewBndProjectWizardFactory().create();
                                projectWizard.init(PlatformUI.getWorkbench(), StructuredSelection.EMPTY);
                                new WizardDialog(dialog.getShell(), projectWizard).open();
                            } catch (CoreException e) {
                                Plugin.getDefault()
                                    .getLog()
                                    .log(new Status(IStatus.ERROR, Plugin.PLUGIN_ID, 0, "Unable to open New Bnd Project wizard", e));
                            }
                        }
                    } else if ("#prefs".equals(ev.text)) {
                        // Open the preference dialog with the template repositories page open.
                        // We can't reopen the New Project wizard after because we don't know that the user changed
                        // anything.
                        PreferenceDialog prefsDialog = PreferencesUtil.createPreferenceDialogOn(getShell(), "bndtools.prefPages.repos", null, null);
                        prefsDialog.open();
                    }
                }
            });
            GridData gd = new GridData(SWT.FILL, SWT.CENTER, true, false);
            link.setLayoutData(gd);

            // ControlDecoration decor = new ControlDecoration(link, SWT.LEFT, composite);
            // decor.setImage(FieldDecorationRegistry.getDefault().getFieldDecoration(FieldDecorationRegistry.DEC_WARNING).getImage());

            Label separator = new Label(composite, SWT.SEPARATOR | SWT.HORIZONTAL);
            separator.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1));
        } else {
            // There is a workspace, just return null (no controls will be inserted into the panel).
            composite = null;
        }
        return composite;
    }

    @Override
    public void dispose() {
        super.dispose();
        if (warningImg != null && !warningImg.isDisposed())
            warningImg.dispose();
    }

}