/*
 * 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 java.net.URI;
import java.net.URISyntaxException;

import net.sourceforge.phpeclipse.xdebug.core.PHPDebugUtils;
import net.sourceforge.phpeclipse.xdebug.core.DebugConnection.DebugResponse;

import org.eclipse.core.runtime.Path;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.model.IRegisterGroup;
import org.eclipse.debug.core.model.IStackFrame;
import org.eclipse.debug.core.model.IThread;
import org.eclipse.debug.core.model.IVariable;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * @author Axel
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class XDebugStackFrame  extends XDebugElement implements IStackFrame {
	
	private XDebugThread fThread;
//	private String fName;
	private int fLineNo;
	private String fFileName;
	private int fId;
	private IVariable[] fVariables;
	private String fLevel;
	private String fType;
	private String fWhere;
	
	/**
	 * Constructs a stack frame in the given thread with the given
	 * frame data.
	 * 
	 * @param thread
	 * @param data frame data
	 * @param id stack frame id (0 is the bottom of the stack)
	 */
	public XDebugStackFrame(XDebugThread thread, Node stackNode, int id) {
		super((XDebugTarget) thread.getDebugTarget());
		fId = id;
		fThread = thread;
		init(stackNode);
	}
	
	/**
	 * Initializes this frame based on its data
	 * 
	 * @param data
	 */
	private void init(Node stackNode) {
		
		fLevel=PHPDebugUtils.getAttributeValue(stackNode,"level");
		fType=PHPDebugUtils.getAttributeValue(stackNode,"type");
		String fileName=PHPDebugUtils.unescapeString(PHPDebugUtils.getAttributeValue(stackNode,"filename"));
		String lineNo=PHPDebugUtils.getAttributeValue(stackNode,"lineno");

		if (lineNo!="")
			fLineNo= Integer.parseInt(lineNo);
		
		fWhere=PHPDebugUtils.getAttributeValue(stackNode,"where");
		
		fFileName = (new Path(fileName)).lastSegment();
		int id=-1;
		try {
			id=((XDebugTarget)getDebugTarget()).sendRequest("context_get","-d "+fLevel);
		} catch (DebugException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		DebugResponse response=((XDebugTarget)getDebugTarget()).getResponse(id);
		Node responseNode = response.getParentNode();
		NodeList property = responseNode.getChildNodes();
		fVariables = new IVariable[property.getLength()];
		for (int i = 0; i < property.getLength(); i++) {
			Node propertyNode = property.item(i);
			fVariables[i] = new XDebugVariable(this, propertyNode);
		}

//		int numVars = strings.length - 3;
//		fVariables = new IVariable[numVars];
//		for (int i = 0; i < numVars; i++) {
//			fVariables[i] = new XDebugVariable(this, strings[i + 3]);
//		}
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStackFrame#getThread()
	 */
	public IThread getThread() {
		return fThread;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStackFrame#getVariables()
	 */
	public IVariable[] getVariables() throws DebugException {
		return fVariables;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStackFrame#hasVariables()
	 */
	public boolean hasVariables() throws DebugException {
		return fVariables.length > 0;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStackFrame#getLineNumber()
	 */
	public int getLineNumber() throws DebugException {
		return fLineNo;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStackFrame#getCharStart()
	 */
	public int getCharStart() throws DebugException {
		return -1;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStackFrame#getCharEnd()
	 */
	public int getCharEnd() throws DebugException {
		return -1;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStackFrame#getName()
	 */
	public String getName() throws DebugException {
		return fFileName+"::"+fWhere+ " : lineno "+ fLineNo;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStackFrame#getRegisterGroups()
	 */
	public IRegisterGroup[] getRegisterGroups() throws DebugException {
		return null;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStackFrame#hasRegisterGroups()
	 */
	public boolean hasRegisterGroups() throws DebugException {
		return false;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#canStepInto()
	 */
	public boolean canStepInto() {
		return getThread().canStepInto();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#canStepOver()
	 */
	public boolean canStepOver() {
		return getThread().canStepOver();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#canStepReturn()
	 */
	public boolean canStepReturn() {
		return getThread().canStepReturn();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#isStepping()
	 */
	public boolean isStepping() {
		return getThread().isStepping();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#stepInto()
	 */
	public void stepInto() throws DebugException {
		getThread().stepInto();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#stepOver()
	 */
	public void stepOver() throws DebugException {
		getThread().stepOver();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IStep#stepReturn()
	 */
	public void stepReturn() throws DebugException {
		getThread().stepReturn();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#canResume()
	 */
	public boolean canResume() {
		return getThread().canResume();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#canSuspend()
	 */
	public boolean canSuspend() {
		return getThread().canSuspend();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#isSuspended()
	 */
	public boolean isSuspended() {
		return getThread().isSuspended();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#resume()
	 */
	public void resume() throws DebugException {
		getThread().resume();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ISuspendResume#suspend()
	 */
	public void suspend() throws DebugException {
		getThread().suspend();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ITerminate#canTerminate()
	 */
	public boolean canTerminate() {
		return getThread().canTerminate();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ITerminate#isTerminated()
	 */
	public boolean isTerminated() {
		return getThread().isTerminated();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.ITerminate#terminate()
	 */
	public void terminate() throws DebugException {
		getThread().terminate();
	}
	
	/**
	 * Returns the name of the source file this stack frame is associated
	 * with.
	 * 
	 * @return the name of the source file this stack frame is associated
	 * with
	 */
	public String getSourceName() {
		return fFileName;
	}
	/* (non-Javadoc)
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	public boolean equals(Object obj) {
		if (obj instanceof XDebugStackFrame) {
			XDebugStackFrame sf = (XDebugStackFrame)obj;
			try {
				return sf.getSourceName().equals(getSourceName()) &&
					sf.getLineNumber() == getLineNumber() &&
					sf.fId == fId;
			} catch (DebugException e) {
			}
		}
		return false;
	}
	/* (non-Javadoc)
	 * @see java.lang.Object#hashCode()
	 */
	public int hashCode() {
		return getSourceName().hashCode() + fId;
	}
	
	/**
	 * Returns this stack frame's unique identifier within its thread
	 * 
	 * @return this stack frame's unique identifier within its thread
	 */
	protected int getIdentifier() {
		return fId;
	}
}