/*
 * Created on Mar 6, 2003
 *
 * To change this generated comment go to 
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package org.eclipse.wst.common.tests.collector;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Enumeration;
import java.util.Hashtable;

import junit.framework.TestSuite;

import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;

/**
 * @author jsholl
 *
 * To change this generated comment go to 
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class TestCollectorGUI extends Composite implements ModifyListener {

    private TestCollectorInnerPanes innerPanes = null;
    private Combo combo = null;

    private Hashtable testSuites = new Hashtable();
    private Hashtable classLoaders = new Hashtable();

    /**
     * @param parent
     * @param style
     */
    public TestCollectorGUI(Composite parent, int style) {
        super(parent, style);

        loadConfiguration();

        createPartControl();
    }

    private void loadConfiguration() {
        TestCollectorPlugin plugin = TestCollectorPlugin.instance;
        IExtension[] suitesExtensions = plugin.suitesExtensionPoint.getExtensions();

        for (int i = 0; i < suitesExtensions.length; i++) {
            IExtension extension = suitesExtensions[i];
            IConfigurationElement[] tests = extension.getConfigurationElements();
            for (int j = 0; j < tests.length; j++) {
                try {
                    IConfigurationElement element = tests[j];
                    String suiteName = element.getAttribute("suiteName");
                    String suiteClass = element.getAttribute("suiteClass");
                    testSuites.put(suiteName, suiteClass);
                    classLoaders.put(suiteName, extension.getDeclaringPluginDescriptor().getPluginClassLoader());
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public void createPartControl() {
        GridLayout gridLayout = new GridLayout();
        gridLayout.numColumns = 1;
        setLayout(gridLayout);

        GridData gridData = new GridData(GridData.FILL_HORIZONTAL);
        gridData.horizontalSpan = 1;

        combo = new Combo(this, SWT.READ_ONLY);
        Enumeration keys = testSuites.keys();
        ArrayList arrayList = new ArrayList();
        while (keys.hasMoreElements()) {
            arrayList.add(keys.nextElement());
        }

        Collections.sort(arrayList, new Comparator() {
            public int compare(Object o1, Object o2) {
                return ((String) o1).compareTo(((String) o2));
            }
        });

        for (int i = 0; i < arrayList.size(); i++) {
            combo.add((String) arrayList.get(i));
        }
        combo.setLayoutData(gridData);
        combo.addModifyListener(this);
        if (combo.getItemCount() > 0) {
            combo.select(0);
        }
    }

    /* (non-Javadoc)
     * @see org.eclipse.swt.events.ModifyListener#modifyText(org.eclipse.swt.events.ModifyEvent)
     */
    public void modifyText(ModifyEvent e) {
        if (e.getSource() == combo) {
            updateCombo(e);
        }
    }

    private void updateCombo(ModifyEvent e) {
        if (null != innerPanes) {
            innerPanes.dispose();
        }
        try {
            String className = (String) testSuites.get(combo.getText());
            ClassLoader classLoader = (ClassLoader) classLoaders.get(combo.getText());
            TestSuite suite = (TestSuite) classLoader.loadClass(className).newInstance();

            innerPanes = new TestCollectorInnerPanes(this, SWT.NULL, new SuiteHelper(suite));

            GridData gridData = new GridData(GridData.FILL_BOTH);
            gridData.horizontalSpan = 1;
            innerPanes.setLayoutData(gridData);
            layout();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

}