package no.uio.ifi.refaktor.handlers;

import no.uio.ifi.refaktor.extractors.Prefix;
import no.uio.ifi.refaktor.extractors.UnionOfLongestCommonPrefixesExtractor;
import no.uio.ifi.refaktor.utils.ParseUtils;
import no.uio.ifi.refaktor.utils.SmartTextSelection;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.text.TextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.texteditor.ITextEditor;

public class TestPropertyExtractorHandler extends SelectionAbstractHandler {

	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		ITextEditor editor = getEditor(event);
		IDocument document = getDocument(editor);
		
		ITextSelection strippedTextSelection = ParseUtils.stripTextSelection(document, getTextSelection(event));
		SmartTextSelection smartTextSelection = new SmartTextSelection(document, strippedTextSelection);
		editor.getSite().getSelectionProvider().setSelection(smartTextSelection);
		
		UnionOfLongestCommonPrefixesExtractor extractor = new UnionOfLongestCommonPrefixesExtractor(smartTextSelection);
//		LongestCommonPrefixExtractor extractor = new LongestCommonPrefixExtractor(smartTextSelection);
		String dialogText = "";
		if (extractor.selectionIsValid()) {
			extractor.extractProperty();
			for (Prefix p: extractor.getPrefixes().values()) {
				dialogText += p.toString() + " (" + p.getCount() + ")\n";
			}
//			dialogText += extractor.stringProperty();
		} else {
			dialogText = "Selection is invalid";
		}

		MessageDialog.openInformation(HandlerUtil.getActiveWorkbenchWindowChecked(event).getShell(), "Test Property Extractor", dialogText);
		return null;
	}

	private TextSelection getTextSelection(ExecutionEvent event) throws ExecutionException {
		ISelection selection = HandlerUtil.getCurrentSelectionChecked(event);
		assert selection instanceof TextSelection;
		return (TextSelection) selection;
	}

}