/*
 * Created on 23.11.2004
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package net.sourceforge.phpeclipse.xdebug.php.model;

import org.eclipse.debug.core.DebugEvent;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IDebugEventSetListener;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.core.model.IStackFrame;
import org.eclipse.debug.core.model.IThread;

/**
 * @author Axel
 * 
 * TODO To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
public class XDebugThread extends XDebugElement implements IThread,
		IDebugEventSetListener {

	/**
	 * Breakpoints this thread is suspended at or <code>null</code> if none.
	 */

	private IStackFrame[] fStackFrames = null;

	private IBreakpoint[] fBreakpoints;

	/**
	 * Whether this thread is stepping
	 */
	private boolean fStepping = false;

	/**
	 * Constructs a new thread for the given target
	 * 
	 * @param target
	 *            VM
	 */
	public XDebugThread(XDebugTarget target) {
		super(target);
		DebugPlugin.getDefault().addDebugEventListener(this);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IThread#getStackFrames()
	 */
	public IStackFrame[] getStackFrames() throws DebugException {
		if (isSuspended()) {
			if (fStackFrames == null) {
				// XDebugCorePlugin.log(IStatus.INFO,"vor getStackFrames");
				fStackFrames = ((XDebugTarget) getDebugTarget())
						.getStackFrames();
				// XDebugCorePlugin.log(IStatus.INFO,"nach getStackFrames");
			}
			return fStackFrames;
		} else {
			return new IStackFrame[0];
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IThread#hasStackFrames()
	 */
	public boolean hasStackFrames() throws DebugException {
		return isSuspended();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IThread#getPriority()
	 */
	public int getPriority() throws DebugException {
		return 0;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IThread#getTopStackFrame()
	 */
	public IStackFrame getTopStackFrame() throws DebugException {
		IStackFrame[] frames = getStackFrames();
		if (frames.length > 0) {
			return frames[0];
		}
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IThread#getName()
	 */
	public String getName() throws DebugException {
		// if (fStackFrames!=null)
		// return fStackFrames[0].getName();
		// else
		return "Thread[1]";
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IThread#getBreakpoints()
	 */
	public IBreakpoint[] getBreakpoints() {
		if (fBreakpoints == null) {
			return new IBreakpoint[0];
		}
		return fBreakpoints;
	}

	/**
	 * Sets the breakpoints this thread is suspended at, or <code>null</code>
	 * if none.
	 * 
	 * @param breakpoints
	 *            the breakpoints this thread is suspended at, or
	 *            <code>null</code> if none
	 */
	protected void setBreakpoints(IBreakpoint[] breakpoints) {
		fBreakpoints = breakpoints;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.ISuspendResume#canResume()
	 */
	public boolean canResume() {
		return isSuspended();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.ISuspendResume#canSuspend()
	 */
	public boolean canSuspend() {
		return !isSuspended();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.ISuspendResume#isSuspended()
	 */
	public boolean isSuspended() {
		return getDebugTarget().isSuspended();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.ISuspendResume#resume()
	 */
	public void resume() throws DebugException {
		fStackFrames = null;
		fBreakpoints = null;
		getDebugTarget().resume();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.ISuspendResume#suspend()
	 */
	public void suspend() throws DebugException {
		getDebugTarget().suspend();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IStep#canStepInto()
	 */
	public boolean canStepInto() {
		return isSuspended();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IStep#canStepOver()
	 */
	public boolean canStepOver() {
		return isSuspended();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IStep#canStepReturn()
	 */
	public boolean canStepReturn() {
		if (fStackFrames != null)
			return (fStackFrames.length > 1);
		else
			return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IStep#isStepping()
	 */
	public boolean isStepping() {
		return fStepping;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IStep#stepInto()
	 */
	public void stepInto() throws DebugException {
		fStackFrames = null;
		fBreakpoints = null;
		((XDebugTarget) getDebugTarget()).step_into();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IStep#stepOver()
	 */
	public void stepOver() throws DebugException {
		fStackFrames = null;
		fBreakpoints = null;
		((XDebugTarget) getDebugTarget()).step_over();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IStep#stepReturn()
	 */
	public void stepReturn() throws DebugException {
		fStackFrames = null;
		fBreakpoints = null;
		((XDebugTarget) getDebugTarget()).step_out();

	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.ITerminate#canTerminate()
	 */
	public boolean canTerminate() {
		return !isTerminated();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.ITerminate#isTerminated()
	 */
	public boolean isTerminated() {
		return getDebugTarget().isTerminated();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.ITerminate#terminate()
	 */
	public void terminate() throws DebugException {
		getDebugTarget().terminate();
	}

	/**
	 * Sets whether this thread is stepping
	 * 
	 * @param stepping
	 *            whether stepping
	 */
	protected void setStepping(boolean stepping) {
		fStepping = stepping;
	}

	public void handleDebugEvents(DebugEvent[] events) {
		DebugEvent de = events[0];
		System.out.println(de.toString());

	}

	public void removeEventListeners() {
		DebugPlugin.getDefault().removeDebugEventListener(this);

	}
}