package org.ntlab.traceDebugger;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.ntlab.traceAnalysisPlatform.tracer.trace.TraceJSON;
import org.ntlab.traceDebugger.analyzerProvider.AbstractAnalyzer;
import org.ntlab.traceDebugger.analyzerProvider.DeltaExtractionAnalyzer;
import org.ntlab.traceDebugger.analyzerProvider.VariableUpdatePointFinder;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle
 */
public class TraceDebuggerPlugin extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "org.ntlab.traceDebugger"; //$NON-NLS-1$
	
	private static DebuggingController debuggingController = DebuggingController.getInstance();;

	private static AbstractAnalyzer analyzer;
	
	private static int uniqueIdForViews = 0;
	
	private static Map<String, Set<IViewPart>> viewIdToAllViews = new HashMap<>();
	
	private static Map<String, IViewPart> viewIdToActiveView = new HashMap<>();
	
	// The shared instance
	private static TraceDebuggerPlugin plugin;
	
	private static boolean isJapanese = true;
	
	/**
	 * The constructor
	 */
	public TraceDebuggerPlugin() {
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		plugin = null;
		super.stop(context);
	}

	/**
	 * Returns the shared instance
	 *
	 * @return the shared instance
	 */
	public static TraceDebuggerPlugin getDefault() {
		return plugin;
	}
	
	public boolean fileOpenAction(Shell shell) {
		if (debuggingController.isLoadingTraceFile()) {
			if (isJapanese()) {
				MessageDialog.openInformation(null, "読み込み中", "トレースファイルを読み込み中です");
			} else {
				MessageDialog.openInformation(null, "Loading", "This debugger is loading the trace.");	
			}
			return false;
		}
		if (debuggingController.isRunning()) {
			if (isJapanese()) {
				MessageDialog.openInformation(null, "実行中", "トレース上で実行中です");
			} else {
				MessageDialog.openInformation(null, "Running", "This debugger is running on the trace.");	
			}
			return false;
		}
		FileDialog fileDialog = new FileDialog(shell, SWT.OPEN);
		fileDialog.setText(isJapanese() ? "トレースファイルを開く" : "Open Trace File");
		fileDialog.setFilterExtensions(new String[]{"*.*"});
		String path = fileDialog.open();
		if (path == null) return false;
		
		((CallStackView)getActiveView(CallStackView.ID)).reset();
		((VariableView)getActiveView(VariableView.ID)).reset();
		((BreakPointView)getActiveView(BreakPointView.ID)).reset();
		TracePointsRegisterView tracePointsView = (TracePointsRegisterView)getActiveView(TracePointsRegisterView.ID);
		if (tracePointsView != null) tracePointsView.reset();
		CallTreeView callTreeView = (CallTreeView)getActiveView(CallTreeView.ID);
		if (callTreeView != null) callTreeView.reset();
		loadTraceFileOnNewThread(path);
		return true;
	}
	
	private void loadTraceFileOnNewThread(final String filePath) {
		final String msg = isJapanese() ? "トレースファイルを読み込み中" : "Loading Trace File";
		Job job = new Job(msg) {
			@Override
			protected IStatus run(IProgressMonitor monitor) {
				monitor.beginTask(msg + " (" + filePath + ")", IProgressMonitor.UNKNOWN);
				debuggingController.setLodingTraceFile();
				analyzer = null;
				TraceJSON trace = new TraceJSON(filePath);
				analyzer = new DeltaExtractionAnalyzer(trace);
				VariableUpdatePointFinder.getInstance().setTrace(trace);
				final TraceBreakPoints traceBreakPoints = new TraceBreakPoints(trace);

				// GUIの操作はGUIのイベントディスパッチを行っているスレッドからしか操作できないのでそうする
				final BreakPointView breakpointView = (BreakPointView)getActiveView(BreakPointView.ID);
				Control control = breakpointView.getViewer().getControl();
				control.getDisplay().syncExec(new Runnable() {
					@Override
					public void run() {
						breakpointView.updateTraceBreakPoints(traceBreakPoints);
						breakpointView.updateImagesForBreakPoint(true);
					}
				});
				monitor.done();
				if (!(monitor.isCanceled())) {
					debuggingController.setHasLoadedTraceFile();
					return Status.OK_STATUS;
				} else {
					debuggingController.setHasNotLoadedTraceFile();
					return Status.CANCEL_STATUS;
				}
			}
		};
		job.setUser(true);
		job.schedule();
	}
	
	public static AbstractAnalyzer getAnalyzer() {
		return analyzer;
	}
	
	public static IViewPart getActiveView(String viewId) {
		return viewIdToActiveView.get(viewId);
	}
	
	public static Map<String, Set<IViewPart>> getAllViews() {
		return viewIdToAllViews;
	}
	
	public static Set<IViewPart> getViews(String viewId) {
		return viewIdToAllViews.get(viewId);
	}
	
	public static void setAnalyzer(AbstractAnalyzer analyzer) {
		TraceDebuggerPlugin.analyzer = analyzer;
	}
	
	public static void setActiveView(String viewId, IViewPart activeView) {
		viewIdToActiveView.put(viewId, activeView);
		addView(viewId, activeView);
	}
	
	private static void addView(String viewId, IViewPart view) {
		Set<IViewPart> views = viewIdToAllViews.get(viewId);
		if (views == null) {
			views = new HashSet<IViewPart>();
			viewIdToAllViews.put(viewId, views);
		}
		views.add(view);
	}

	public static IViewPart createNewView(String viewId, int mode) {
		String secondaryId = "View" + (uniqueIdForViews++);
		IWorkbenchPage workbenchPage = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
		try {
			return workbenchPage.showView(viewId, secondaryId, mode);
		} catch (PartInitException e) {
			throw new RuntimeException(e);
		}
	}
	
	public static void removeView(String viewId, IViewPart view) {
		viewIdToActiveView.remove(viewId, view);
		Set<IViewPart> views = viewIdToAllViews.get(viewId);
		if (views != null) {
			views.remove(view);
		}
	}
	
	@Override
	protected void initializeImageRegistry(ImageRegistry reg) {
		// note: ブレークポイントビューに関するアイコン
		reg.put(BreakPointView.DEBUG_ELCL, getImageDescriptor("/icons/debug/debug_elcl.png"));
		reg.put(BreakPointView.DEBUG_DLCL, getImageDescriptor("/icons/debug/debug_dlcl.png"));
		reg.put(BreakPointView.IMPORT_BREAKPOINT_ELCL, getImageDescriptor("/icons/debug/import_brkpts_elcl.png"));
		reg.put(BreakPointView.IMPORT_BREAKPOINT_DLCL, getImageDescriptor("/icons/debug/import_brkpts_dlcl.png"));
		reg.put(BreakPointViewRelatedDelta.STEP_NEXT_ELCL, getImageDescriptor("/icons/debug/stepnext_elcl.png"));
		reg.put(BreakPointViewRelatedDelta.STEP_NEXT_DLCL, getImageDescriptor("/icons/debug/stepnext_dlcl.png"));
		reg.put(BreakPointViewRelatedDelta.STEP_BACK_INTO_ELCL, getImageDescriptor("/icons/debug/stepbackinto_elcl.png"));
		reg.put(BreakPointViewRelatedDelta.STEP_BACK_INTO_DLCL, getImageDescriptor("/icons/debug/stepbackinto_dlcl.png"));
		reg.put(BreakPointViewRelatedDelta.STEP_BACK_OVER_ELCL, getImageDescriptor("/icons/debug/stepbackover_elcl.png"));
		reg.put(BreakPointViewRelatedDelta.STEP_BACK_OVER_DLCL, getImageDescriptor("/icons/debug/stepbackover_dlcl.png"));
		reg.put(BreakPointViewRelatedDelta.STEP_BACK_RETURN_ELCL, getImageDescriptor("/icons/debug/stepbackreturn_elcl.png"));
		reg.put(BreakPointViewRelatedDelta.STEP_BACK_RETURN_DLCL, getImageDescriptor("/icons/debug/stepbackreturn_dlcl.png"));
		reg.put(BreakPointViewRelatedDelta.BACK_RESUME_ELCL, getImageDescriptor("/icons/debug/backresume_elcl.png"));		
		reg.put(BreakPointViewRelatedDelta.BACK_RESUME_DLCL, getImageDescriptor("/icons/debug/backresume_dlcl.png"));
		
		// note: 変数ビューに関するアイコン
		reg.put(VariableLabelProvider.PSEUDO_VARIABLE, getImageDescriptor("/icons/variable/specialvariable.png"));
		reg.put(VariableLabelProvider.THIS_VARIABLE, getImageDescriptor("/icons/variable/thisvariable.png"));
		reg.put(VariableLabelProvider.FIELD_VARIABLE, getImageDescriptor("/icons/variable/fieldvariable.png"));
		reg.put(VariableLabelProvider.ARG_VARIABLE, getImageDescriptor("/icons/variable/localvariable.png"));
	}
	
	public static ImageDescriptor getImageDescriptor(String path) {
		return imageDescriptorFromPlugin(PLUGIN_ID, path);
	}
	
	public static boolean isJapanese() {
		return isJapanese;
	}
}