package org.nightlabs.jfire.issuetracking.ui.issue.editor;

import java.text.DateFormat;
import java.util.List;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.forms.editor.FormPage;
import org.eclipse.ui.forms.events.ExpansionAdapter;
import org.eclipse.ui.forms.events.ExpansionEvent;
import org.eclipse.ui.forms.widgets.ExpandableComposite;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.nightlabs.base.ui.composite.XComposite;
import org.nightlabs.base.ui.composite.XComposite.LayoutMode;
import org.nightlabs.jfire.issue.Issue;
import org.nightlabs.jfire.issue.IssueComment;
import org.nightlabs.jfire.issuetracking.ui.resource.Messages;

/**
 * @author Chairat Kongarayawetchakun <!-- chairat [AT] nightlabs [DOT] de -->
 *
 */
public class IssueCommentListSection
extends AbstractIssueEditorGeneralSection
{
	private Issue issue;
	private FormToolkit toolkit;
	private XComposite commentComposite;

	private int oldSize;

	public IssueCommentListSection(FormPage page, Composite parent, final IssueEditorPageController controller) {
		super(page, parent, controller);
		getSection().setText(Messages.getString("org.nightlabs.jfire.issuetracking.ui.issue.editor.IssueCommentListSection.section.text")); //$NON-NLS-1$
		getSection().setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		// Sets up the toolkit.
		toolkit = new FormToolkit(getSection().getShell().getDisplay());

		commentComposite = new XComposite(getSection(), SWT.NONE, LayoutMode.TIGHT_WRAPPER);
		commentComposite.getGridLayout().numColumns = 1;

		getSection().setClient(commentComposite);
	}

	private boolean firstLoaded = true;

	@Override
	protected void doSetIssue(Issue newIssue) {

		if (issue != null && newIssue.getComments().size() == oldSize) {
			return;
		}

		issue = newIssue;
		oldSize = issue.getComments().size();

		getSection().setText(String.format(
				Messages.getString("org.nightlabs.jfire.issuetracking.ui.issue.editor.IssueCommentListSection.section.fillNo.text"),  //$NON-NLS-1$
				oldSize)
		);

		if (firstLoaded) {
			List<IssueComment> comments = newIssue.getComments();
			for (int i = 0; i < comments.size(); i++) {
				addComment(commentComposite, comments.get(i), i == comments.size() - 1 ? true : false);
			}
			firstLoaded = false;
		}
		else {
			if (newIssue.getComments().size() > 0) {
				addComment(commentComposite, newIssue.getComments().get(newIssue.getComments().size() - 1), true);
			}
		}

		reflowParentForm();
	}

	protected void reflowParentForm() {
		getManagedForm().getForm().getBody().layout(true, true);
		getManagedForm().getForm().reflow(true);
	}

	private static DateFormat dateTimeFormat = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);

	private void addComment(Composite parent, IssueComment comment, boolean expand) {
		ExpandableComposite commentEntry = new ExpandableComposite(
				parent, SWT.NONE, ExpandableComposite.COMPACT | ExpandableComposite.TREE_NODE | ExpandableComposite.EXPANDED);
		commentEntry.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		commentEntry.setFont(new Font(getSection().getDisplay(), new FontData("Courier", 10, SWT.BOLD))); //$NON-NLS-1$
		commentEntry.setText(String.format("%s - %s",  //$NON-NLS-1$
				comment.getUser().getName(),
				dateTimeFormat.format(comment.getCreateTimestamp())));

		toolkit.adapt(commentEntry);

		/********Using Text********/
		Text text = toolkit.createText(commentEntry, comment.getText(), SWT.MULTI | SWT.WRAP);
		text.setEditable(false);

		text.setFont(new Font(getSection().getDisplay(), new FontData("Courier", 10, SWT.NORMAL))); //$NON-NLS-1$
		commentEntry.setClient(text);

//		/********Using FormText********/
//		FormText text = toolkit.createFormText(commentEntry, false);
//		text.setText(comment.getText(),
//				false,
//				false);
//		text.setWhitespaceNormalized(false);
//		commentEntry.setClient(text);

		commentEntry.addExpansionListener(new ExpansionAdapter() {
			@Override
			public void expansionStateChanged(ExpansionEvent e) {
				// resizes the application window.
				reflowParentForm();
			}
		});

		commentEntry.setExpanded(expand);

		//Adds actions to each comment, Chairat
		Menu bar = new Menu(commentEntry);
		commentEntry.setMenu(bar);
		MenuItem fileMenu = new MenuItem(bar, SWT.CASCADE);
		fileMenu.setText("&File");
	}
}