package com.limegroup.gnutella.gui.actions;

import java.awt.Toolkit;
import java.awt.datatransfer.StringSelection;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;

import com.limegroup.gnutella.FileDetails;
import com.limegroup.gnutella.browser.MagnetOptions;
import com.limegroup.gnutella.gui.FileDetailsProvider;
import com.limegroup.gnutella.gui.GUIMediator;
import com.limegroup.gnutella.gui.search.MagnetClipboardListener;
import com.limegroup.gnutella.settings.QuestionsHandler;

/**
 * Action that creates a list of magnet links for a selection of {@link
 * FileDesc FileDescs} and copies the list to the clipboard. 
 *  <p>
 * It also makes sure that the {@link
 * com.limegroup.gnutella.gui.search.MagnetClipboardListener} doesn't pick up
 * the exact same list when the main frame becomes active.
 */
public class CopyMagnetLinkToClipboardAction extends AbstractAction {

	private FileDetailsProvider provider;
	
	public CopyMagnetLinkToClipboardAction(FileDetailsProvider provider) {
		this.provider = provider;
		putValue(Action.NAME, GUIMediator.getStringResource
				("MAGNET_COPY_MAGNET_LINKS_LABEL"));
		putValue(Action.SHORT_DESCRIPTION, GUIMediator.getStringResource
				("MAGNET_COPY_MAGNET_LINKS_TOOLTIP"));
	}

	
	public void actionPerformed(ActionEvent e) {
		setClipboardString();
	}
		
	private void setClipboardString() {
		FileDetails[] files = provider.getFileDetails();
		StringBuffer buffer = new StringBuffer();
		
		boolean isFirewalled = false;
		// TODO fberger maybe introduce this in the future
//		boolean notCopiedAll = false;
		String sep = System.getProperty("line.separator");
		
		for (int i = 0; i < files.length; i++) {
			if (buffer.length() > 0) {
				buffer.append(sep);
			}
			MagnetOptions magnet = MagnetOptions.createMagnet(files[i]);
			if (magnet.isDownloadable()) {
				isFirewalled |= files[i].isFirewalled();
				buffer.append(magnet.toExternalForm());
			}
//			else {
//				notCopiedAll = true;
//			}
		}

		final String text = buffer.toString();
		MagnetClipboardListener.getInstance().setCopiedText(text);
		StringSelection sel = new StringSelection(text);
		Toolkit.getDefaultToolkit().getSystemClipboard().setContents(sel, sel);
		
		if (isFirewalled) {
			GUIMediator.showWarning("MAGNET_COPY_MAGNET_LINKS_WARNING",
					QuestionsHandler.FIREWALLED_MAGNET_LINK);
		}
	}

}