/******************************************************************************
* Copyright (C) 2011-2012  Hussain Bohra 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:
*     Hussain Bohra <hussain.bohra@tavant.com> - initial API and implementation
*     Fabio Zadrozny <fabiofz@gmail.com>       - ongoing maintenance
******************************************************************************/
package org.python.pydev.debug.model;

import org.python.pydev.debug.core.ConfigureExceptionsFileUtils;
import org.python.pydev.shared_core.callbacks.ListenerList;

public class PyPropertyTraceManager {

    // Static variables
    public static final String PROPERTY_TRACE_STATE = "property_trace_state.prefs";

    private static PyPropertyTraceManager pyPropertyTraceManager;

    // For instance
    private ListenerList<IPropertyTraceListener> listeners = new ListenerList<IPropertyTraceListener>(
            IPropertyTraceListener.class);

    /**
     * Singleton: private constructor.
     */
    private PyPropertyTraceManager() {

    }

    public static synchronized PyPropertyTraceManager getInstance() {
        if (pyPropertyTraceManager == null) {
            pyPropertyTraceManager = new PyPropertyTraceManager();
        }
        return pyPropertyTraceManager;
    }

    // Getters

    public String getPyPropertyTraceState() {
        return ConfigureExceptionsFileUtils.readFromMetadataFile(PROPERTY_TRACE_STATE);
    }

    public void setPyPropertyTraceState(boolean replaceProperty, boolean disableGetterTrace,
            boolean disableSetterTrace, boolean disableDelterTrace) {

        String propertyTrace = Boolean.toString(replaceProperty) + ConfigureExceptionsFileUtils.DELIMITER
                + Boolean.toString(disableGetterTrace) + ConfigureExceptionsFileUtils.DELIMITER
                + Boolean.toString(disableSetterTrace) + ConfigureExceptionsFileUtils.DELIMITER
                + Boolean.toString(disableDelterTrace);
        ConfigureExceptionsFileUtils.writeToFile(PyPropertyTraceManager.PROPERTY_TRACE_STATE, propertyTrace, false);

        for (IPropertyTraceListener listener : this.listeners.getListeners()) {
            listener.onSetPropertyTraceConfiguration();
        }
    }

    // Listeners

    public void addListener(IPropertyTraceListener listener) {
        this.listeners.add(listener);
    }

    public void removeListener(IPropertyTraceListener listener) {
        this.listeners.remove(listener);
    }
}