/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */

package net.sourceforge.phpeclipse.preferences;

import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferenceStore;
import org.eclipse.jface.util.IPropertyChangeListener;
//import org.eclipse.jface.util.PropertyChangeEvent;

/**
 * An overlaying preference store.
 */
public class OverlayPreferenceStore implements IPreferenceStore {

	public static final class TypeDescriptor {
		private TypeDescriptor() {
		}
	};

	public static final TypeDescriptor BOOLEAN = new TypeDescriptor();

	public static final TypeDescriptor DOUBLE = new TypeDescriptor();

	public static final TypeDescriptor FLOAT = new TypeDescriptor();

	public static final TypeDescriptor INT = new TypeDescriptor();

	public static final TypeDescriptor LONG = new TypeDescriptor();

	public static final TypeDescriptor STRING = new TypeDescriptor();

	public static class OverlayKey {

		TypeDescriptor fDescriptor;

		String fKey;

		public OverlayKey(TypeDescriptor descriptor, String key) {
			fDescriptor = descriptor;
			fKey = key;
		}
	};

//	private class PropertyListener implements IPropertyChangeListener {
//
//		/*
//		 * @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
//		 */
//		public void propertyChange(PropertyChangeEvent event) {
//			OverlayKey key = findOverlayKey(event.getProperty());
//			if (key != null)
//				propagateProperty(fParent, key, fStore);
//		}
//	};

	private IPreferenceStore fParent;

	private IPreferenceStore fStore;

	private OverlayKey[] fOverlayKeys;

	//private PropertyListener fPropertyListener;

	public OverlayPreferenceStore(IPreferenceStore parent,
			OverlayKey[] overlayKeys) {
		fParent = parent;
		fOverlayKeys = overlayKeys;
		fStore = new PreferenceStore();
	}

	private OverlayKey findOverlayKey(String key) {
		for (int i = 0; i < fOverlayKeys.length; i++) {
			if (fOverlayKeys[i].fKey.equals(key))
				return fOverlayKeys[i];
		}
		return null;
	}

	private boolean covers(String key) {
		return (findOverlayKey(key) != null);
	}

//	private void propagateProperty(IPreferenceStore orgin, OverlayKey key,
//			IPreferenceStore target) {
//
//		if (orgin.isDefault(key.fKey)) {
//			if (!target.isDefault(key.fKey))
//				target.setToDefault(key.fKey);
//			return;
//		}
//
//		TypeDescriptor d = key.fDescriptor;
//		if (BOOLEAN == d) {
//
//			boolean originValue = orgin.getBoolean(key.fKey);
//			boolean targetValue = target.getBoolean(key.fKey);
//			if (targetValue != originValue)
//				target.setValue(key.fKey, originValue);
//
//		} else if (DOUBLE == d) {
//
//			double originValue = orgin.getDouble(key.fKey);
//			double targetValue = target.getDouble(key.fKey);
//			if (targetValue != originValue)
//				target.setValue(key.fKey, originValue);
//
//		} else if (FLOAT == d) {
//
//			float originValue = orgin.getFloat(key.fKey);
//			float targetValue = target.getFloat(key.fKey);
//			if (targetValue != originValue)
//				target.setValue(key.fKey, originValue);
//
//		} else if (INT == d) {
//
//			int originValue = orgin.getInt(key.fKey);
//			int targetValue = target.getInt(key.fKey);
//			if (targetValue != originValue)
//				target.setValue(key.fKey, originValue);
//
//		} else if (LONG == d) {
//
//			long originValue = orgin.getLong(key.fKey);
//			long targetValue = target.getLong(key.fKey);
//			if (targetValue != originValue)
//				target.setValue(key.fKey, originValue);
//
//		} else if (STRING == d) {
//
//			String originValue = orgin.getString(key.fKey);
//			String targetValue = target.getString(key.fKey);
//			if (targetValue != null && originValue != null
//					&& !targetValue.equals(originValue))
//				target.setValue(key.fKey, originValue);
//
//		}
//	}

//	public void propagate() {
//		for (int i = 0; i < fOverlayKeys.length; i++)
//			propagateProperty(fStore, fOverlayKeys[i], fParent);
//	}

	private void loadProperty(IPreferenceStore orgin, OverlayKey key,
			IPreferenceStore target, boolean forceInitialization) {
		TypeDescriptor d = key.fDescriptor;
		if (BOOLEAN == d) {

			if (forceInitialization)
				target.setValue(key.fKey, true);
			target.setValue(key.fKey, orgin.getBoolean(key.fKey));
			target.setDefault(key.fKey, orgin.getDefaultBoolean(key.fKey));

		} else if (DOUBLE == d) {

			if (forceInitialization)
				target.setValue(key.fKey, 1.0D);
			target.setValue(key.fKey, orgin.getDouble(key.fKey));
			target.setDefault(key.fKey, orgin.getDefaultDouble(key.fKey));

		} else if (FLOAT == d) {

			if (forceInitialization)
				target.setValue(key.fKey, 1.0F);
			target.setValue(key.fKey, orgin.getFloat(key.fKey));
			target.setDefault(key.fKey, orgin.getDefaultFloat(key.fKey));

		} else if (INT == d) {

			if (forceInitialization)
				target.setValue(key.fKey, 1);
			target.setValue(key.fKey, orgin.getInt(key.fKey));
			target.setDefault(key.fKey, orgin.getDefaultInt(key.fKey));

		} else if (LONG == d) {

			if (forceInitialization)
				target.setValue(key.fKey, 1L);
			target.setValue(key.fKey, orgin.getLong(key.fKey));
			target.setDefault(key.fKey, orgin.getDefaultLong(key.fKey));

		} else if (STRING == d) {

			if (forceInitialization)
				target.setValue(key.fKey, "1"); //$NON-NLS-1$
			target.setValue(key.fKey, orgin.getString(key.fKey));
			target.setDefault(key.fKey, orgin.getDefaultString(key.fKey));

		}
	}

	public void load() {
		for (int i = 0; i < fOverlayKeys.length; i++)
			loadProperty(fParent, fOverlayKeys[i], fStore, true);
	}

//	public void loadDefaults() {
//		for (int i = 0; i < fOverlayKeys.length; i++)
//			setToDefault(fOverlayKeys[i].fKey);
//	}

//	public void start() {
//		if (fPropertyListener == null) {
//			fPropertyListener = new PropertyListener();
//			fParent.addPropertyChangeListener(fPropertyListener);
//		}
//	}

//	public void stop() {
//		if (fPropertyListener != null) {
//			fParent.removePropertyChangeListener(fPropertyListener);
//			fPropertyListener = null;
//		}
//	}

	/*
	 * @see IPreferenceStore#addPropertyChangeListener(IPropertyChangeListener)
	 */
	public void addPropertyChangeListener(IPropertyChangeListener listener) {
		fStore.addPropertyChangeListener(listener);
	}

	/*
	 * @see IPreferenceStore#removePropertyChangeListener(IPropertyChangeListener)
	 */
	public void removePropertyChangeListener(IPropertyChangeListener listener) {
		fStore.removePropertyChangeListener(listener);
	}

	/*
	 * @see IPreferenceStore#firePropertyChangeEvent(String, Object, Object)
	 */
	public void firePropertyChangeEvent(String name, Object oldValue,
			Object newValue) {
		fStore.firePropertyChangeEvent(name, oldValue, newValue);
	}

	/*
	 * @see IPreferenceStore#contains(String)
	 */
	public boolean contains(String name) {
		return fStore.contains(name);
	}

	/*
	 * @see IPreferenceStore#getBoolean(String)
	 */
	public boolean getBoolean(String name) {
		return fStore.getBoolean(name);
	}

	/*
	 * @see IPreferenceStore#getDefaultBoolean(String)
	 */
	public boolean getDefaultBoolean(String name) {
		return fStore.getDefaultBoolean(name);
	}

	/*
	 * @see IPreferenceStore#getDefaultDouble(String)
	 */
	public double getDefaultDouble(String name) {
		return fStore.getDefaultDouble(name);
	}

	/*
	 * @see IPreferenceStore#getDefaultFloat(String)
	 */
	public float getDefaultFloat(String name) {
		return fStore.getDefaultFloat(name);
	}

	/*
	 * @see IPreferenceStore#getDefaultInt(String)
	 */
	public int getDefaultInt(String name) {
		return fStore.getDefaultInt(name);
	}

	/*
	 * @see IPreferenceStore#getDefaultLong(String)
	 */
	public long getDefaultLong(String name) {
		return fStore.getDefaultLong(name);
	}

	/*
	 * @see IPreferenceStore#getDefaultString(String)
	 */
	public String getDefaultString(String name) {
		return fStore.getDefaultString(name);
	}

	/*
	 * @see IPreferenceStore#getDouble(String)
	 */
	public double getDouble(String name) {
		return fStore.getDouble(name);
	}

	/*
	 * @see IPreferenceStore#getFloat(String)
	 */
	public float getFloat(String name) {
		return fStore.getFloat(name);
	}

	/*
	 * @see IPreferenceStore#getInt(String)
	 */
	public int getInt(String name) {
		return fStore.getInt(name);
	}

	/*
	 * @see IPreferenceStore#getLong(String)
	 */
	public long getLong(String name) {
		return fStore.getLong(name);
	}

	/*
	 * @see IPreferenceStore#getString(String)
	 */
	public String getString(String name) {
		return fStore.getString(name);
	}

	/*
	 * @see IPreferenceStore#isDefault(String)
	 */
	public boolean isDefault(String name) {
		return fStore.isDefault(name);
	}

	/*
	 * @see IPreferenceStore#needsSaving()
	 */
	public boolean needsSaving() {
		return fStore.needsSaving();
	}

	/*
	 * @see IPreferenceStore#putValue(String, String)
	 */
	public void putValue(String name, String value) {
		if (covers(name))
			fStore.putValue(name, value);
	}

	/*
	 * @see IPreferenceStore#setDefault(String, double)
	 */
	public void setDefault(String name, double value) {
		if (covers(name))
			fStore.setDefault(name, value);
	}

	/*
	 * @see IPreferenceStore#setDefault(String, float)
	 */
	public void setDefault(String name, float value) {
		if (covers(name))
			fStore.setDefault(name, value);
	}

	/*
	 * @see IPreferenceStore#setDefault(String, int)
	 */
	public void setDefault(String name, int value) {
		if (covers(name))
			fStore.setDefault(name, value);
	}

	/*
	 * @see IPreferenceStore#setDefault(String, long)
	 */
	public void setDefault(String name, long value) {
		if (covers(name))
			fStore.setDefault(name, value);
	}

	/*
	 * @see IPreferenceStore#setDefault(String, String)
	 */
	public void setDefault(String name, String value) {
		if (covers(name))
			fStore.setDefault(name, value);
	}

	/*
	 * @see IPreferenceStore#setDefault(String, boolean)
	 */
	public void setDefault(String name, boolean value) {
		if (covers(name))
			fStore.setDefault(name, value);
	}

	/*
	 * @see IPreferenceStore#setToDefault(String)
	 */
	public void setToDefault(String name) {
		fStore.setToDefault(name);
	}

	/*
	 * @see IPreferenceStore#setValue(String, double)
	 */
	public void setValue(String name, double value) {
		if (covers(name))
			fStore.setValue(name, value);
	}

	/*
	 * @see IPreferenceStore#setValue(String, float)
	 */
	public void setValue(String name, float value) {
		if (covers(name))
			fStore.setValue(name, value);
	}

	/*
	 * @see IPreferenceStore#setValue(String, int)
	 */
	public void setValue(String name, int value) {
		if (covers(name))
			fStore.setValue(name, value);
	}

	/*
	 * @see IPreferenceStore#setValue(String, long)
	 */
	public void setValue(String name, long value) {
		if (covers(name))
			fStore.setValue(name, value);
	}

	/*
	 * @see IPreferenceStore#setValue(String, String)
	 */
	public void setValue(String name, String value) {
		if (covers(name))
			fStore.setValue(name, value);
	}

	/*
	 * @see IPreferenceStore#setValue(String, boolean)
	 */
	public void setValue(String name, boolean value) {
		if (covers(name))
			fStore.setValue(name, value);
	}
}