package no.uio.ifi.refaktor.handlers;

import static no.uio.ifi.refaktor.RefaktorAssert.assertThat;
import static org.hamcrest.CoreMatchers.instanceOf;
import no.uio.ifi.refaktor.analyze.ExtractAndMoveMethodAnalysisResult;
import no.uio.ifi.refaktor.analyze.analyzers.SearchBasedExtractAndMoveMethodAnalyzer;
import no.uio.ifi.refaktor.analyze.comparators.FavorNoUnfixesAnalysisResultComparator;
import no.uio.ifi.refaktor.analyze.exceptions.NoTargetFoundException;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jdt.core.IMethod;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ITreeSelection;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.handlers.HandlerUtil;

public class SearchBasedExtractAndMoveMethodAnalysisHandler extends AbstractHandler {

	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		ISelection selection = HandlerUtil.getCurrentSelectionChecked(event);
		IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindowChecked(event);

		assertThat(selection, instanceOf(ITreeSelection.class));
		ITreeSelection treeSelection = (ITreeSelection) selection;
		Object o = treeSelection.getFirstElement();
		assertThat(o, instanceOf(IMethod.class));
		IMethod method = (IMethod) o;

		String message = "";
		try {
			SearchBasedExtractAndMoveMethodAnalyzer analyzer = new SearchBasedExtractAndMoveMethodAnalyzer(method, new FavorNoUnfixesAnalysisResultComparator());
			analyzer.analyze();
			ExtractAndMoveMethodAnalysisResult result = analyzer.getResult();
			message = "Result:\n\nText selection:\n" + result.textSelection 
					+ "\n\nSelected text:\n" + result.textSelection.getText()
					+ "\n\nNumber of text selections analyzed:\n" + result.numberOfTextSelectionsAnalyzed
					+ "\n\nOriginal target:\n" + result.calculateOriginalTarget();
		} catch (NoTargetFoundException e) {
			message = "No solution found for " + method;
		}

		MessageDialog.openInformation(window.getShell(), "no.uio.ifi.refaktor", message);
		return null;
	}

}