/*******************************************************************************
 * Copyright (c) 2010 György Orosz.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     György Orosz - initial API and implementation
 ******************************************************************************/
package org.erlide.wrangler.refactoring.ui.warning;

import java.util.ArrayList;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.part.ViewPart;
import org.erlide.util.ErlLogger;

/**
 * Displays warning messages got from Wrangler
 *
 * @author Gyorgy Orosz
 * @version %I%, %G%
 */
public class WarningView extends ViewPart implements IWarningHandler {

    /**
     * The ID of the view as specified by the extension.
     */
    public static final String ID = "org.erlide.wrangler.refactoring.ui.warning.WarningView";

    private TableViewer viewer;

    private final ArrayList<WarningMessage> warningMessages = new ArrayList<>();

    protected final class RemoveAction extends Action {
        protected RemoveAction() {
            setText("Remove all");
            setToolTipText("Remove all warning message");
            setImageDescriptor(PlatformUI.getWorkbench().getSharedImages()
                    .getImageDescriptor(ISharedImages.IMG_ELCL_REMOVEALL));

        }

        @Override
        public void run() {
            removeAll();
        }
    }

    // private Action doubleClickAction;

    class ViewContentProvider implements IStructuredContentProvider {
        @Override
        public void inputChanged(final Viewer v, final Object oldInput,
                final Object newInput) {
        }

        @Override
        public void dispose() {
        }

        @Override
        public Object[] getElements(final Object parent) {
            return warningMessages.toArray();
        }
    }

    class ViewLabelProvider extends LabelProvider implements ITableLabelProvider {
        @Override
        public String getColumnText(final Object obj, final int index) {
            return getText(((WarningMessage) obj).getMessage());
        }

        @Override
        public Image getColumnImage(final Object obj, final int index) {
            return getImage(obj);
        }

        @Override
        public Image getImage(final Object obj) {
            return PlatformUI.getWorkbench().getSharedImages()
                    .getImage(ISharedImages.IMG_OBJS_WARN_TSK);
        }
    }

    class NameSorter extends ViewerSorter {
        @Override
        public int compare(final Viewer theViewer, final Object e1, final Object e2) {
            final WarningMessage w1 = (WarningMessage) e1;
            final WarningMessage w2 = (WarningMessage) e2;
            return -1 * w1.getTimestamp().compareTo(w2.getTimestamp());
        }
    }

    /**
     * The constructor.
     */
    public WarningView() {
    }

    /**
     * This is a callback that will allow us to create the viewer and initialize
     * it.
     */
    @Override
    public void createPartControl(final Composite parent) {
        viewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
        viewer.setContentProvider(new ViewContentProvider());
        viewer.setLabelProvider(new ViewLabelProvider());
        viewer.setSorter(new NameSorter());
        viewer.setInput(getViewSite());
        final IToolBarManager mgr = getViewSite().getActionBars().getToolBarManager();
        mgr.add(new RemoveAction());

    }

    /**
     * Passing the focus request to the viewer's control.
     */
    @Override
    public void setFocus() {
        viewer.getControl().setFocus();
    }

    @Override
    public void addMessage(final String message) {
        warningMessages.add(new WarningMessage(message));
    }

    @Override
    public void refresh() {
        try {
            viewer.refresh();
        } catch (final Exception e) {
            ErlLogger.error(e);
        }

    }

    @Override
    public void removeAll() {
        warningMessages.clear();
        refresh();
    }
}