/*
 * Created on 15 mai 2004
 * Copyright 2004 J�r�me N�gre
 */
package net.sourceforge.phpeclipse.news.view;

import java.util.ArrayList;

import net.sourceforge.phpeclipse.news.Channel;
import net.sourceforge.phpeclipse.news.IconManager;
import net.sourceforge.phpeclipse.news.Item;
import net.sourceforge.phpeclipse.news.Plugin;
import net.sourceforge.phpeclipse.news.RssListener;
import net.sourceforge.phpeclipse.news.dialogs.NewChannelDialog;
import net.sourceforge.phpeclipse.webbrowser.views.BrowserView;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.part.ViewPart;

/**
 * @author J�r�me N�gre
 */
public class ExplorerView extends ViewPart implements RssListener {

  private TreeViewer treeViewer;

  private NewsTreeViewerProvider provider;

  private Action refreshAction;

  private Action newChannelAction;

  public ExplorerView() {
    super();
  }

  public void dispose() {
    Plugin.getDefault().removeRssListener(this);
    super.dispose();
  }

  public void createPartControl(Composite parent) {
    treeViewer = new TreeViewer(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
    provider = new NewsTreeViewerProvider();
    treeViewer.setContentProvider(provider);
    treeViewer.setLabelProvider(provider);
    treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
      public void selectionChanged(SelectionChangedEvent event) {
        Object selected = ((StructuredSelection) event.getSelection()).getFirstElement();
        if (selected != null) {
          if (selected instanceof Channel) {
            Plugin.getDefault().notifyChannelSelected((Channel) selected, ExplorerView.this);
          } else if (selected instanceof Item) {
            Plugin.getDefault().notifyItemSelected((Item) selected, ExplorerView.this);
          }
        }
      }
    });

    createActions();
    createMenu();
    createToolBar();

    Plugin.getDefault().addRssListener(this);
    treeViewer.setInput(Plugin.getDefault());
  }

  public void setFocus() {
    treeViewer.getControl().setFocus();
  }

  public void onChannelListChanged(ArrayList channels) {
    treeViewer.setInput(Plugin.getDefault());
  }

  public void onChannelStatusChanged(final Channel channel) {
    treeViewer.getControl().getDisplay().asyncExec(new Runnable() {
      public void run() {
        treeViewer.refresh(channel);
      }
    });
  }

  public void onChannelSelected(Channel channel) {
    System.out.println("Explorer.onChannelSelected -> " + channel);
  }

  public void onItemStatusChanged(final Item item) {
    treeViewer.getControl().getDisplay().asyncExec(new Runnable() {
      public void run() {
        treeViewer.refresh(item);
      }
    });
  }

  private void createActions() {
    //refresh
    refreshAction = new Action("Refresh", IconManager.getImageDescriptor(IconManager.ICON_ACTION_REFRESH)) {
      public void run() {
        Plugin.getDefault().update();
      }
    };
    refreshAction.setToolTipText("Refresh");

    //  newChannel
    newChannelAction = new Action("Add New Channel") {
      public void run() {
        NewChannelDialog ncd = new NewChannelDialog(ExplorerView.this.getViewSite().getShell());
        ncd.open();
      }
    };
  }

  private void createMenu() {
    IMenuManager mgr = getViewSite().getActionBars().getMenuManager();
    mgr.add(newChannelAction);
  }

  private void createToolBar() {
    IToolBarManager mgr = getViewSite().getActionBars().getToolBarManager();
    mgr.add(refreshAction);
  }

  private void setUrl(String url) {
    IWorkbenchPage page = Plugin.getDefault().getActivePage();
    try {
      IViewPart part = page.findView(BrowserView.ID_BROWSER);
      if (part == null) {
        part = page.showView(BrowserView.ID_BROWSER);
      } else {
        page.bringToTop(part);
      }
      ((BrowserView) part).setUrl(url);
    } catch (Exception e) {
    }
  }

  //    public void onItemSelected(Item tiem) {
  //		// NOP
  //	}
  public void onItemSelected(Item item) {
    if (item != null) { // && uiReady && linkAction.isChecked()) {
      //			if(showDescritionAction.isChecked()) {
      //				String desc = item.getDescription();
      //				if(desc == null)
      //					desc = HTML_NO_DESCRIPTION;
      //				browser.setText(MessageFormat.format(HTML,new String[]{desc, encodeNewLine(desc), item.getUsableLink(),
      // item.getUsableTitle()}));
      //			} else {
      setUrl(item.getUsableLink());
      //			}
      //XXX this is a hack, should be done otherwise
      boolean channelStatus = item.getChannel().isUnread();
      item.setReadFlag(true);
      Plugin.getDefault().notifyItemStatusChanged(item, this);
      if (channelStatus != item.getChannel().isUnread()) {
        Plugin.getDefault().notifyChannelStatusChanged(item.getChannel(), this);
      }
    }
  }
}