/*******************************************************************************
 * Copyright (c) 2004, 2013 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ant.internal.launching.debug.model;

import com.ibm.icu.text.MessageFormat;

import java.util.HashMap;
import java.util.Map;

import org.eclipse.ant.internal.launching.debug.IAntDebugConstants;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.core.model.LineBreakpoint;

/**
 * Ant line breakpoint
 */
public class AntLineBreakpoint extends LineBreakpoint {

	/**
	 * Default constructor is required for the breakpoint manager to re-create persisted breakpoints. After instantiating a breakpoint, the
	 * <code>setMarker(...)</code> method is called to restore this breakpoint's attributes.
	 */
	public AntLineBreakpoint() {
	}

	/**
	 * Constructs a line breakpoint on the given resource at the given line number. The line number is 1-based (i.e. the first line of a file is line
	 * number 1).
	 * 
	 * @param resource
	 *            file on which to set the breakpoint
	 * @param lineNumber
	 *            1-based line number of the breakpoint
	 * @throws CoreException
	 *             if unable to create the breakpoint
	 */
	public AntLineBreakpoint(IResource resource, int lineNumber) throws CoreException {
		this(resource, lineNumber, new HashMap<String, Object>(), true);
	}

	/**
	 * Constructs a line breakpoint on the given resource at the given line number. The line number is 1-based (i.e. the first line of a file is line
	 * number 1).
	 * 
	 * @param resource
	 *            file on which to set the breakpoint
	 * @param lineNumber
	 *            1-based line number of the breakpoint
	 * @param attributes
	 *            the marker attributes to set
	 * @param register
	 *            whether to add this breakpoint to the breakpoint manager
	 * @throws CoreException
	 *             if unable to create the breakpoint
	 */
	public AntLineBreakpoint(final IResource resource, final int lineNumber, final Map<String, Object> attributes, final boolean register) throws CoreException {
		IWorkspaceRunnable wr = new IWorkspaceRunnable() {
			@Override
			public void run(IProgressMonitor monitor) throws CoreException {
				IMarker marker = resource.createMarker(IAntDebugConstants.ID_ANT_LINE_BREAKPOINT_MARKER);
				setMarker(marker);
				attributes.put(IBreakpoint.ENABLED, Boolean.TRUE);
				attributes.put(IMarker.LINE_NUMBER, new Integer(lineNumber));
				attributes.put(IBreakpoint.ID, IAntDebugConstants.ID_ANT_DEBUG_MODEL);
				attributes.put(IMarker.MESSAGE, MessageFormat.format(DebugModelMessages.AntLineBreakpoint_0, new Object[] { Integer.toString(lineNumber) }));
				ensureMarker().setAttributes(attributes);

				register(register);
			}
		};
		run(getMarkerRule(resource), wr);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IBreakpoint#getModelIdentifier()
	 */
	@Override
	public String getModelIdentifier() {
		return IAntDebugConstants.ID_ANT_DEBUG_MODEL;
	}

	/**
	 * @return whether this breakpoint is a run to line breakpoint
	 */
	public boolean isRunToLine() {
		try {
			return ensureMarker().getAttribute(IAntDebugConstants.ANT_RUN_TO_LINE, false);
		}
		catch (DebugException e) {
			return false;
		}
	}

	/**
	 * Add this breakpoint to the breakpoint manager, or sets it as unregistered.
	 */
	private void register(boolean register) throws CoreException {
		if (register) {
			DebugPlugin.getDefault().getBreakpointManager().addBreakpoint(this);
		} else {
			setRegistered(false);
		}
	}
}