/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

package com.nokia.carbide.cpp.internal.pi.analyser;

import java.util.ArrayList;

import java.util.HashMap;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.swt.widgets.Composite;

import com.nokia.carbide.cpp.internal.pi.manager.PluginRegisterer;

import com.nokia.carbide.cpp.internal.pi.model.GenericTrace;

import com.nokia.carbide.cpp.internal.pi.model.TraceDataRepository;

import com.nokia.carbide.cpp.internal.pi.plugin.model.AbstractPiPlugin;

import com.nokia.carbide.cpp.internal.pi.test.AnalysisInfoHandler;

import com.nokia.carbide.cpp.pi.util.GeneralMessages;

/*

 * Try to encapsulate data related to each opened NPI file (e.g. AnalysTab and NPI related data) 

 * in one centralized location, instead of tossing around classes within UI/processing code

 */

public class NpiInstanceRepository {

	static public final int DISPOSED_UID = -1;

	private class UidObject {

		// this is just for generating UID

	};

	static private NpiInstanceRepository instance;

	// the UID of current UI

	private static int activeInstance;

	// all these maps are maintained by UID of instances

	private static HashMap<Integer, UidObject> uidObjectMap = new HashMap<Integer, UidObject>();

	private static HashMap<Integer, HashMap<String,GenericTrace>> traceCollectionMap = new HashMap<Integer, HashMap<String,GenericTrace>>();

	private static HashMap<Integer, HashMap<String,Object>> persistCollectionMap = new HashMap<Integer, HashMap<String,Object>>();

	private static HashMap<Integer, ArrayList<AbstractPiPlugin>> pluginListMap = new HashMap<Integer, ArrayList<AbstractPiPlugin>>();

	private static HashMap<Integer, ArrayList<ProfileVisualiser>> profilePagesMap = new  HashMap<Integer, ArrayList<ProfileVisualiser>>();

	private static HashMap<Integer, Composite> parentCompositeMap = new HashMap<Integer, Composite>();

	private static HashMap<Integer, AnalysisInfoHandler> analysisInfoHandlerMap = new HashMap<Integer, AnalysisInfoHandler>();

	private NpiInstanceRepository() {

		// singleton

	}

	public static NpiInstanceRepository getInstance() {

		if (instance == null) {

			instance = new NpiInstanceRepository();

		}

		return instance;

	}

	public int register(Composite composite) {

		UidObject uidObject = new UidObject();

		Integer uid = new Integer(uidObject.hashCode());

		uidObjectMap.put(uid, uidObject);

		HashMap<String,GenericTrace> traceCollection = new HashMap<String,GenericTrace>();

		traceCollectionMap.put(uid, traceCollection);

		HashMap<String,Object> persistCollection = new HashMap<String,Object>();

		persistCollectionMap.put(uid, persistCollection);

		ArrayList<AbstractPiPlugin> pluginList = new ArrayList<AbstractPiPlugin>();

		pluginListMap.put(uid, pluginList);

		ArrayList<ProfileVisualiser> profilePages = new ArrayList<ProfileVisualiser>();

		profilePagesMap.put(uid, profilePages);

		parentCompositeMap.put(uid, composite);

		AnalysisInfoHandler analysisInfoHandler = new AnalysisInfoHandler();

		analysisInfoHandlerMap.put(uid, analysisInfoHandler);

		TraceDataRepository.getInstance().registerTraces(uid.intValue());

		PluginRegisterer.registerAllPlugins();

		switchActiveUid(uid);

		return uid;	

	}

	public void unregister(int instanceUid) {

		Integer uidInteger = new Integer(instanceUid);

		uidObjectMap.remove(uidInteger);

		HashMap<String,GenericTrace> traceCollection = traceCollectionMap.get(uidInteger);

		traceCollection.clear();

		traceCollectionMap.remove(uidInteger);

		HashMap<String,Object> persistCollection =  persistCollectionMap.get(uidInteger);

		persistCollection.clear();

		persistCollectionMap.remove(uidInteger);

		ArrayList<AbstractPiPlugin> pluginList =  pluginListMap.get(uidInteger);

		pluginList.clear();

		pluginListMap.remove(uidInteger);

		ArrayList<ProfileVisualiser> profilePages = profilePagesMap.get(uidInteger);

		profilePages.clear();

		profilePagesMap.remove(uidInteger);

		parentCompositeMap.remove(uidInteger);

		analysisInfoHandlerMap.remove(uidInteger);

		TraceDataRepository.getInstance().removeTraces(instanceUid);

		// In general it's a good idea to keep memory footprint low

		System.runFinalization();

		System.gc();

	}

	public int size() {

		return uidObjectMap.size();

	}

	public void setParentComposite(int instanceUid, Composite parent) {

		parentCompositeMap.remove(instanceUid);

		parentCompositeMap.put(instanceUid, parent);

	}

	public void activeUidAddTrace(String className, GenericTrace trace) {

		int instanceUid = activeUid();

		instance.addTrace(instanceUid, className, trace);

	}

	private void addTrace(int instanceUid, String className, GenericTrace trace) {

		HashMap<String,GenericTrace> newEntry = traceCollectionMap.get(instanceUid);

		newEntry.put(className + ".trace", trace); //$NON-NLS-1$

		traceCollectionMap.put(instanceUid, newEntry);

	}

	public GenericTrace activeUidGetTrace(String className) {

		int instanceUid = activeUid();

		return getTrace(instanceUid, className);

	}

	private GenericTrace getTrace(int instanceUid, String className) {

		HashMap<String,GenericTrace> entry = traceCollectionMap.get(instanceUid);

		assertLog(entry != null, Messages.getString("NpiInstanceRepository.0") + instanceUid); //$NON-NLS-1$

		if (entry == null) {

			entry = new HashMap<String,GenericTrace>();

		}

		return entry.get(className + ".trace"); //$NON-NLS-1$

	}

	public void activeUidRemoveTrace(String className) {

		int instanceUid = activeUid();

		removeTrace(instanceUid, className);

	}

	private void removeTrace(int instanceUid, String className) {

		HashMap<String,GenericTrace> entry = traceCollectionMap.get(instanceUid);

		// if we don't have any opened NPI, the active one == disposed and trace will be

		// harmlessly removed one more time upon exit

		if (instanceUid != DISPOSED_UID) {

			assertLog(entry != null, Messages.getString("NpiInstanceRepository.1") + instanceUid); //$NON-NLS-1$

		}

		if (entry == null) {

			return;

		}

		entry.remove(className);

	}

	public void switchActiveUid(int instanceUid) {

		activeInstance = instanceUid;

	}

	public int activeUid() {

		return activeInstance;

	}

	// return array list of this tab's plugins

	public ArrayList<AbstractPiPlugin> getPlugins(int instanceUid)	{

		ArrayList<AbstractPiPlugin> pluginList = pluginListMap.get(instanceUid);

		assertLog(pluginList != null, Messages.getString("NpiInstanceRepository.2") + instanceUid); //$NON-NLS-1$

		if (pluginList == null) {

			pluginList = new ArrayList<AbstractPiPlugin>();

		}

		return pluginList;

	}

	// add the plugin to this tab's list

	public void addPlugin(int instanceUid, AbstractPiPlugin plugin) {

		ArrayList<AbstractPiPlugin> pluginList = pluginListMap.get(instanceUid);

		assertLog(pluginList != null, Messages.getString("NpiInstanceRepository.3") + instanceUid); //$NON-NLS-1$

		if (pluginList != null && !pluginList.contains(plugin))

			pluginList.add(plugin);

	}

	// return array list of this tab's pages

	public ArrayList<ProfileVisualiser> activeUidGetProfilePages() {

		int instanceUid = activeUid();

		return getProfilePages(instanceUid);

	}

	// return array list of this tab's pages

	private ArrayList<ProfileVisualiser> getProfilePages(int instanceUid) {

		ArrayList<ProfileVisualiser> pages = profilePagesMap.get(instanceUid);

		assertLog(pages != null, Messages.getString("NpiInstanceRepository.4") + instanceUid); //$NON-NLS-1$

		if (pages == null) {

			pages = new ArrayList<ProfileVisualiser>();

		}

		return pages;

	}

	// return a particular page

	public ProfileVisualiser getProfilePage(int instanceUid, int index) {

		ArrayList<ProfileVisualiser> pages  = profilePagesMap.get(instanceUid);

		assertLog(pages != null, Messages.getString("NpiInstanceRepository.5") + instanceUid); //$NON-NLS-1$

		if (pages == null) {

			pages = new ArrayList<ProfileVisualiser>();

		}

		ProfileVisualiser visualizer;

		try {

			visualizer = pages.get(index);

		} catch (IndexOutOfBoundsException e) {

			return null;

		} catch (Exception e) {

			return null;

		}

		return visualizer;

	}

	public Composite activeUidGetParentComposite() {

		int instanceUid = activeUid();

		Composite parent = parentCompositeMap.get(instanceUid);

		return parent;

	}

	public AnalysisInfoHandler activeUidGetAnalysisInfoHandler() {

		int instanceUid = activeUid();

	    return getAnalysisInfoHandler(instanceUid);

	}

	public AnalysisInfoHandler getAnalysisInfoHandler(int instanceUid) {

		return analysisInfoHandlerMap.get(instanceUid);

	}

	public void activeUidSetPersistState (String key, Object state) {

		int instanceUid = activeUid();

		setPersistState(instanceUid, key, state);

	}

	public void setPersistState (int instanceUid, String key, Object state) {

		HashMap<String, Object> entry = persistCollectionMap.get(instanceUid);

		entry.put(key, state);

	}

	private Object getPersistDefault (String key) {

		if (key.equals("com.nokia.carbide.cpp.pi.address.thresholdCountThread") || //$NON-NLS-1$

				key.equals("com.nokia.carbide.cpp.pi.address.thresholdCountBinary") || //$NON-NLS-1$

				key.equals("com.nokia.carbide.cpp.pi.address.thresholdCountFunction") ) { //$NON-NLS-1$

			return new Integer(-1);

		}

		if (key.equals("com.nokia.carbide.cpp.pi.address.thresholdLoadThread") || //$NON-NLS-1$

				key.equals("com.nokia.carbide.cpp.pi.address.thresholdLoadBinary")) { //$NON-NLS-1$

			return new Double(0.001);

		}

		if (key.equals("com.nokia.carbide.cpp.pi.address.thresholdLoadFunction")) { //$NON-NLS-1$

			return new Double(0.0001);

		}

		if (key.equals("com.nokia.carbide.cpp.pi.address.useOnlyThreadThresholds")) {	//$NON-NLS-1$

			return new Boolean(false);

		}

		return null;

	}

	public Object activeUidGetPersistState (String key) {

		int instanceUid = activeUid();

		return getPersistState(instanceUid, key);

	}

	public Object getPersistState (int instanceUid, String key) {

		HashMap<String, Object> entry = persistCollectionMap.get(instanceUid);

		Object object = entry.get(key);

		if (object != null) {

			return object;

		}

		return getPersistDefault(key);

	}

	private void assertLog(boolean cond, String message) {

		if (!cond) {

			GeneralMessages.PiLog(message, IStatus.ERROR);

		}

	}

}