package org.ntlab.traceDebugger;

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

import org.eclipse.core.resources.IMarker;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.viewers.TreeNode;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.IWorkbenchPage;
import org.ntlab.traceAnalysisPlatform.tracer.trace.MethodExecution;
import org.ntlab.traceAnalysisPlatform.tracer.trace.MethodInvocation;
import org.ntlab.traceAnalysisPlatform.tracer.trace.TracePoint;
import org.ntlab.traceDebugger.Variable.VariableType;
import org.ntlab.traceDebugger.analyzerProvider.Alias;
import org.ntlab.traceDebugger.analyzerProvider.DeltaMarkerManager;
import org.ntlab.traceDebugger.analyzerProvider.VariableUpdatePointFinder;

public class VariableViewRelatedDelta extends VariableView {
	protected IAction jumpAction;
	private IAction deltaActionForContainerToComponent;
	private IAction deltaActionForThisToAnother;
	public static final String ID = "org.ntlab.traceDebugger.variableViewRelatedDelta";

	public VariableViewRelatedDelta() {
		// TODO Auto-generated constructor stub
		System.out.println("VariableViewRelatedDeltaクラスが生成されたよ!");
	}

	@Override
	public void createPartControl(Composite parent) {
		// TODO Auto-generated method stub
		System.out.println("VariableViewRelatedDelta#createPartControl(Composite)が呼ばれたよ!");
		super.createPartControl(parent);
		TraceDebuggerPlugin.setActiveView(ID, this);
	}

	@Override
	public void setFocus() {
		// TODO Auto-generated method stub
		TraceDebuggerPlugin.setActiveView(ID, this);
		viewer.getControl().setFocus();
	}

	@Override
	protected void createActions() {
		super.createActions();
		jumpAction = new Action() {
			public void run() {
				TracePoint tp = null;
				TracePoint before = DebuggingController.getInstance().getCurrentTp();
				VariableType variableType = selectedVariable.getVariableType();
				if (variableType.equals(VariableType.USE_VALUE)) {
					String containerId = selectedVariable.getContainerId();
					String fieldName = selectedVariable.getFullyQualifiedVariableName();
					tp = VariableUpdatePointFinder.getInstance().getPoint(containerId, fieldName, before);
				} else if (variableType.equals(VariableType.USE_RETURN)) {
					String receiverId = selectedVariable.getContainerId();
					String valueId = selectedVariable.getValueId();
					String receiverClassName = selectedVariable.getContainerClassName();
					VariableUpdatePointFinder finder = VariableUpdatePointFinder.getInstance();
					if (receiverClassName.contains("Iterator") || receiverClassName.contains("Itr")
							|| receiverClassName.contains("Collections$UnmodifiableCollection$1")) {
						tp = finder.getIteratorPoint(receiverId);
						if (tp == null) return;
						MethodInvocation mi = ((MethodInvocation)tp.getStatement()); 
						receiverId = mi.getCalledMethodExecution().getThisObjId();
					}
					tp = finder.getDefinitionInvocationPoint(receiverId, valueId, before);
				}
				if (tp == null) return;
				DebuggingController controller = DebuggingController.getInstance();
				controller.jumpToTheTracePoint(tp, false);
			}
		};
		jumpAction.setText("Jump to Definition");
		jumpAction.setToolTipText("Jump to Definition");

		deltaActionForContainerToComponent = new Action() {
			@Override
			public void run() {				
				DeltaMarkerView newDeltaMarkerView = (DeltaMarkerView)TraceDebuggerPlugin.createNewView(DeltaMarkerView.ID, IWorkbenchPage.VIEW_ACTIVATE);
				newDeltaMarkerView.extractDelta(selectedVariable, true);				
			}
		};
		deltaActionForContainerToComponent.setText("Extract Delta");
		deltaActionForContainerToComponent.setToolTipText("Extract Delta");

		deltaActionForThisToAnother = new Action() {
			@Override
			public void run() {
				DeltaMarkerView newDeltaMarkerView = (DeltaMarkerView)TraceDebuggerPlugin.createNewView(DeltaMarkerView.ID, IWorkbenchPage.VIEW_ACTIVATE);				
				newDeltaMarkerView.extractDelta(selectedVariable, false);
			}
		};
		deltaActionForThisToAnother.setText("Extract Delta");
		deltaActionForThisToAnother.setToolTipText("Extract Delta");
	}
	
	@Override
	protected void createPopupMenu() {
		MenuManager menuMgr = new MenuManager("#PopupMenu");
		menuMgr.setRemoveAllWhenShown(true);
		menuMgr.addMenuListener(new IMenuListener() {
			@Override
			public void menuAboutToShow(IMenuManager manager) {
				// 右クリックする度に呼び出される
				VariableType variableType = selectedVariable.getVariableType();
				if (variableType.equals(VariableType.USE_VALUE)) {
					manager.add(jumpAction);
					jumpAction.setText("Jump to Definition");
					jumpAction.setToolTipText("Jump to Definition");
				} else if (variableType.equals(VariableType.USE_RETURN)) {
					manager.add(jumpAction);
					if (updateDeltaActionForThisToAnotherTexts(selectedVariable)) {
						manager.add(deltaActionForThisToAnother);
					}
					jumpAction.setText("Jump to Addition");
					jumpAction.setToolTipText("Jump to Addition");
				} else if (variableType.isDef()) {
					if (updateDeltaActionForContainerToComponentTexts(selectedVariable)) {
						manager.add(deltaActionForContainerToComponent);
					}
					if (updateDeltaActionForThisToAnotherTexts(selectedVariable)) {
						String text1 = deltaActionForThisToAnother.getText();
						String text2 = deltaActionForContainerToComponent.getText();
						if (!(text1.equals(text2))) {
							manager.add(deltaActionForThisToAnother);
						}
					}
				} else if (variableType.equals(VariableType.PARAMETER)) {
					if (updateDeltaActionForThisToAnotherTexts(selectedVariable)) {
						manager.add(deltaActionForThisToAnother);
					}
				}
				manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
			}
		});
		Menu menu = menuMgr.createContextMenu(viewer.getControl());
		viewer.getControl().setMenu(menu);
		getSite().registerContextMenu(menuMgr, viewer);
	}

	private boolean updateDeltaActionForContainerToComponentTexts(Variable variable) {
		String valueId = selectedVariable.getValueId();
		String valueClassName = selectedVariable.getValueClassName();
		valueClassName = valueClassName.substring(valueClassName.lastIndexOf(".") + 1);
		String containerId = selectedVariable.getContainerId();
		String containerClassName = selectedVariable.getContainerClassName();
		if (containerId != null  && containerClassName != null) {
			containerClassName = containerClassName.substring(containerClassName.lastIndexOf(".") + 1);
			String textForContainerToComponent = String.format("Extract Delta (%s: %s → %s: %s)", containerId, containerClassName, valueId, valueClassName);
			deltaActionForContainerToComponent.setText(textForContainerToComponent);
			deltaActionForContainerToComponent.setToolTipText(textForContainerToComponent);
			return true;
		} else {
			deltaActionForContainerToComponent.setText("");
			deltaActionForContainerToComponent.setToolTipText("");
			return false;
		}
	}
	
	private boolean updateDeltaActionForThisToAnotherTexts(Variable variable) {
		String valueId = selectedVariable.getValueId();
		String valueClassName = selectedVariable.getValueClassName();
		valueClassName = valueClassName.substring(valueClassName.lastIndexOf(".") + 1);
		TracePoint before = selectedVariable.getBeforeTracePoint();
		String thisId = before.getMethodExecution().getThisObjId();
		String thisClassName = before.getMethodExecution().getThisClassName();
		if (thisId != null && thisClassName != null) {			
			thisClassName = thisClassName.substring(thisClassName.lastIndexOf(".") + 1);
			String textForThisToAnother = String.format("Extract Delta (%s: %s → %s: %s)", thisId, thisClassName, valueId, valueClassName);
			deltaActionForThisToAnother.setText(textForThisToAnother);
			deltaActionForThisToAnother.setToolTipText(textForThisToAnother);
			return true;
		} else {
			deltaActionForThisToAnother.setText("");
			deltaActionForThisToAnother.setToolTipText("");
			return false;
		}
	}

	public void markAndExpandVariablesByDeltaMarkers(Map<String, List<IMarker>> markers) {
		List<IMarker> srcSideDeltaMarkers = markers.get(DeltaMarkerManager.SRC_SIDE_DELTA_MARKER);
		List<IMarker> dstSideDeltaMarkers = markers.get(DeltaMarkerManager.DST_SIDE_DELTA_MARKER);
		List<IMarker> coordinatorMarker = markers.get(DeltaMarkerManager.COORDINATOR_DELTA_MARKER);
		if (srcSideDeltaMarkers != null) {
			markVariables(DeltaMarkerManager.SRC_SIDE_DELTA_MARKER, srcSideDeltaMarkers);	
		}
		if (dstSideDeltaMarkers != null) {
			markVariables(DeltaMarkerManager.DST_SIDE_DELTA_MARKER, dstSideDeltaMarkers);	
		}
		if (coordinatorMarker != null) {
			markVariables(DeltaMarkerManager.COORDINATOR_DELTA_MARKER, coordinatorMarker);	
		}
		viewer.refresh();
		expandAllMarkedNodes();
	}
	
	private void markVariables(String markerId, List<IMarker> markerList) {
		Set<String> idSet = new HashSet<>();
		Map<String, Object> additionalAttributesForVariables = new HashMap<>();
		additionalAttributesForVariables.put("markerId", markerId);
		for (IMarker marker : markerList) {
			try {
				Object data = marker.getAttribute(DeltaMarkerManager.DELTA_MARKER_ATR_DATA);
				if (data instanceof Alias) {
					idSet.add(((Alias)data).getObjectId());
				} else if (data instanceof MethodExecution) {
					idSet.add(((MethodExecution)data).getThisObjId());
				}
			} catch (CoreException e) {
				e.printStackTrace();
			}
		}
		variables.addAdditionalAttributes(idSet, additionalAttributesForVariables);
	}
	
	private void expandAllMarkedNodes() {
		Set<TreeNode> expandedNodes = new HashSet<>();
		for (TreeItem item : viewer.getTree().getItems()) {
			Object obj = item.getData();
			if (!(obj instanceof TreeNode)) continue;
			collectNodes((TreeNode)obj, expandedNodes);
		}
		viewer.setExpandedElements(expandedNodes.toArray(new Object[expandedNodes.size()]));
	}
	
	private void collectNodes(TreeNode node, final Set<TreeNode> expandedNodes) {
		Object value = node.getValue();
		if (!(value instanceof Variable)) return;
		Variable variable = (Variable)value;
		if (variable.getAdditionalAttribute("markerId") != null) {
			TreeNode parent = node.getParent();
			if (parent != null) {
				expandedNodes.add(parent);
			}
		}
		TreeNode[] children = node.getChildren();
		if (children == null) return;
		for (TreeNode child : children) {
			collectNodes(child, expandedNodes);
		}
	}	
}