/*
 * 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.memory.actions;

import java.text.DecimalFormat;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

import com.nokia.carbide.cpp.internal.pi.analyser.NpiInstanceRepository;
import com.nokia.carbide.cpp.internal.pi.analyser.ProfileVisualiser;
import com.nokia.carbide.cpp.pi.editors.PIPageEditor;
import com.nokia.carbide.cpp.pi.memory.MaxMemoryItem;
import com.nokia.carbide.cpp.pi.memory.MemThread;
import com.nokia.carbide.cpp.pi.memory.MemThreadTable;
import com.nokia.carbide.cpp.pi.memory.MemTrace;
import com.nokia.carbide.cpp.pi.memory.MemTraceGraph;
import com.nokia.carbide.cpp.pi.memory.Messages;


public class MemoryStatisticsDialog {

	private Shell shell;
	private GridData gridData;
	private DecimalFormat formatKBytes = new DecimalFormat(Messages.getString("MemoryStatisticsDialog.KBformat")); //$NON-NLS-1$
	private DecimalFormat formatBytes  = new DecimalFormat(Messages.getString("MemoryStatisticsDialog.BytesFormat")); //$NON-NLS-1$
	private MemTrace trace;
	private double startTime;
	private double endTime;
	
	public MemoryStatisticsDialog(Display display)
	{
		Group group;
		
		shell = new Shell(display, SWT.APPLICATION_MODAL | SWT.DIALOG_TRIM);
		shell.setText(Messages.getString("MemoryStatisticsDialog.statistics")); //$NON-NLS-1$
		shell.setLayout(new GridLayout(3, false));

    	startTime = PIPageEditor.currentPageEditor().getStartTime();
    	endTime   = PIPageEditor.currentPageEditor().getEndTime();

		trace = (MemTrace)NpiInstanceRepository.getInstance().activeUidGetTrace("com.nokia.carbide.cpp.pi.memory"); //$NON-NLS-1$
		
//		group = new Group(shell, SWT.SHADOW_NONE);
//		group.setText(Messages.getString("MemoryStatisticsDialog.memoryModel")); //$NON-NLS-1$
//		group.setFont(PIPageEditor.helvetica_9);
//		gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
//		gridData.horizontalSpan = 3;
//		group.setLayoutData(gridData);
//		group.setLayout(new GridLayout(3, false));//new FillLayout());
//		
//		String model = ""; //$NON-NLS-1$
//		if (trace.getMemoryModel() == MemTrace.MEMORY_MULTIPLE)
//			model = Messages.getString("MemoryStatisticsDialog.multiple"); //$NON-NLS-1$
//		else if (trace.getMemoryModel() == MemTrace.MEMORY_MOVING)
//			model = Messages.getString("MemoryStatisticsDialog.moving"); //$NON-NLS-1$
//		else if (trace.getMemoryModel() == MemTrace.MEMORY_DIRECT)
//			model = Messages.getString("MemoryStatisticsDialog.direct"); //$NON-NLS-1$
//		else
//			model = Messages.getString("MemoryStatisticsDialog.notRecorded"); //$NON-NLS-1$
//
//		textGrid(group, model, SWT.CENTER, SWT.CENTER, 3); //$NON-NLS-1$

		group = new Group(shell, SWT.SHADOW_NONE);
		group.setText(Messages.getString("MemoryStatisticsDialog.interval")); //$NON-NLS-1$
		group.setFont(PIPageEditor.helvetica_9);
		gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
		gridData.horizontalSpan = 3;
		group.setLayoutData(gridData);
		group.setLayout(new GridLayout(3, false));//new FillLayout());
		textGrid(group, showTimeInterval(startTime, endTime), SWT.CENTER, SWT.CENTER, 3);
		
		int pageIndex = PIPageEditor.currentPageIndex();
		
		MemTraceGraph graph = (MemTraceGraph) trace.getTraceGraph(pageIndex); // since graph intervals are in lockstep, any pageIndex will do
		MemThreadTable table = graph.getMemThreadTable();
		
		MaxMemoryItem systemUseByInterval = trace.getSystemUseByInterval((long) (startTime * 1000.0), (long) (endTime * 1000.0));
		
		group = new Group(shell, SWT.NONE);
		group.setText(Messages.getString("MemoryStatisticsDialog.onDevice")); //$NON-NLS-1$
		group.setFont(PIPageEditor.helvetica_9);
		gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
		gridData.horizontalSpan = 3;
		group.setLayoutData(gridData);
		group.setLayout(new GridLayout(3, false));//new FillLayout());
		
		String usedKB     = Messages.getString("MemoryStatisticsDialog.notRecorded"); //$NON-NLS-1$
		String usedBytes  = ""; //$NON-NLS-1$
		String freeKB     = usedKB;
		String freeBytes  = usedBytes;
		String totalKB    = usedKB;
		String totalBytes = usedBytes;

		if ((long) (endTime * 1000.0 + 0.5) >= trace.getFirstSampleNumber()) {
			long deviceTotalMemory = systemUseByInterval.maxTotal;
			long deviceUsedMemory  = systemUseByInterval.maxChunks;

			usedKB     = formatKBytes.format(deviceUsedMemory / 1024.0);
			usedBytes  = formatBytes.format(deviceUsedMemory);
			freeKB     = formatKBytes.format((deviceTotalMemory - deviceUsedMemory) / 1024.0);
			freeBytes  = formatBytes.format(deviceTotalMemory - deviceUsedMemory);
			totalKB    = formatKBytes.format(deviceTotalMemory / 1024.0);
			totalBytes = formatBytes.format(deviceTotalMemory);
		}
		textGrid(group, Messages.getString("MemoryStatisticsDialog.used"), SWT.LEFT, SWT.CENTER, 1); //$NON-NLS-1$
		textGrid(group, usedKB, SWT.RIGHT, SWT.CENTER, 1);
		textGrid(group, usedBytes, SWT.RIGHT, SWT.CENTER, 1);
		textGrid(group, Messages.getString("MemoryStatisticsDialog.free"), SWT.LEFT, SWT.CENTER, 1); //$NON-NLS-1$
		textGrid(group, freeKB, SWT.RIGHT, SWT.CENTER, 1);
		textGrid(group, freeBytes, SWT.RIGHT, SWT.CENTER, 1);
		textGrid(group, Messages.getString("MemoryStatisticsDialog.total"),  SWT.LEFT, SWT.CENTER, 1); //$NON-NLS-1$
		textGrid(group, totalKB, SWT.RIGHT, SWT.CENTER, 1);
		textGrid(group, totalBytes, SWT.RIGHT, SWT.CENTER, 1);

		group = new Group(shell, SWT.NONE);
		group.setText(Messages.getString("MemoryStatisticsDialog.currentSelection")); //$NON-NLS-1$
		group.setFont(PIPageEditor.helvetica_9);
		gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
		gridData.horizontalSpan = 3;
		group.setLayoutData(gridData);
		group.setLayout(new GridLayout(3, false));//new FillLayout());
		
		String chunkKB    = Messages.getString("MemoryStatisticsDialog.notRecorded"); //$NON-NLS-1$
		String chunkBytes = ""; //$NON-NLS-1$
		String stackKB    = chunkKB;
		String stackBytes = chunkBytes;

		if ((long) (endTime * 1000.0 + 0.5) >= trace.getFirstSampleNumber()) {
			float selectedMaxChunks    = 0;
			float selectedMaxStackHeap = 0;

			Object[] selected = table.getTableViewer().getCheckedElements();
			
			for (int i = 0; i < selected.length; i++) {
				if (selected[i] instanceof MemThread) {
					MemThread checked = (MemThread) selected[i];
					selectedMaxChunks    += checked.maxMemoryItem.maxChunks;
					selectedMaxStackHeap += checked.maxMemoryItem.maxStackHeap;
				}
			}

			chunkKB    = formatKBytes.format(selectedMaxChunks / 1024.0);
			chunkBytes = formatBytes.format((long) selectedMaxChunks);
			stackKB    = formatKBytes.format(selectedMaxStackHeap / 1024.0);
			stackBytes = formatBytes.format((long) selectedMaxStackHeap);
		}

		textGrid(group, Messages.getString("MemoryStatisticsDialog.chunks"),  SWT.LEFT, SWT.CENTER, 1); //$NON-NLS-1$
		textGrid(group, chunkKB, SWT.RIGHT, SWT.CENTER, 1);
		textGrid(group, chunkBytes, SWT.RIGHT, SWT.CENTER, 1);
		textGrid(group, Messages.getString("MemoryStatisticsDialog.stackHeap"), SWT.LEFT, SWT.CENTER, 1); //$NON-NLS-1$
		textGrid(group, stackKB, SWT.RIGHT, SWT.CENTER, 1);
		textGrid(group, stackBytes, SWT.RIGHT, SWT.CENTER, 1);
		
		// create the Close button
		Button close = new Button(shell, SWT.NONE);
		close.setText(Messages.getString("MemoryStatisticsDialog.close")); //$NON-NLS-1$
		gridData = new GridData(SWT.CENTER, SWT.CENTER, true, true);
		gridData.minimumWidth = 60;
		gridData.horizontalSpan = 3;
		close.setLayoutData(gridData);
		close.addSelectionListener(new SelectionListener(){

			public void widgetSelected(SelectionEvent e) {
				shell.close();
			}

			public void widgetDefaultSelected(SelectionEvent e) {
				widgetSelected(e);
			}
		});

		shell.pack();
		shell.open();

		while (!shell.isDisposed()) {
			if (!shell.getDisplay().readAndDispatch()) {
				shell.getDisplay().sleep();
			}
		}
	}
	
	private void textGrid(Composite parent, String text, int labelStyle, int gridStyle, int gridSpan)
	{
		Label label = new Label(parent, labelStyle);
		label.setFont(PIPageEditor.helvetica_9);
		label.setText(text);
		gridData = new GridData(SWT.FILL, gridStyle, true, true);
		gridData.horizontalSpan = gridSpan;
		label.setLayoutData(gridData);		
	}

	public void dispose()
	{
		if (this.shell != null) {
			if (!this.shell.isDisposed()) {
				this.shell.close();				
			}
			this.shell.dispose();
		}

		this.shell = null;
	}

	private static String showTimeInterval(double startTime, double endTime)
	{
		return ProfileVisualiser.timeFormat.format(startTime)
		     + Messages.getString("MemoryStatisticsDialog.interval1") + ProfileVisualiser.timeFormat.format(endTime) //$NON-NLS-1$
		     + Messages.getString("MemoryStatisticsDialog.interval2") + ProfileVisualiser.timeFormat.format(endTime - startTime) //$NON-NLS-1$
		     + Messages.getString("MemoryStatisticsDialog.interval3"); //$NON-NLS-1$
	}
}