/**
 * <copyright>
 * </copyright>
 *
 * $Id$
 */
package org.eclipselabs.mscript.computation.computationmodel.ui.editor.presentation;


import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.emf.ecore.xmi.XMLResource;
import org.eclipse.emf.edit.ui.provider.ExtendedImageRegistry;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.actions.WorkspaceModifyOperation;
import org.eclipse.ui.dialogs.WizardNewFileCreationPage;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.part.ISetSelectionTarget;
import org.eclipselabs.mscript.computation.computationmodel.ComputationModel;
import org.eclipselabs.mscript.computation.computationmodel.ComputationModelFactory;
import org.eclipselabs.mscript.computation.computationmodel.ComputationModelPackage;
import org.eclipselabs.mscript.computation.computationmodel.FixedPointFormat;
import org.eclipselabs.mscript.computation.computationmodel.FloatingPointFormat;
import org.eclipselabs.mscript.computation.computationmodel.FloatingPointFormatKind;
import org.eclipselabs.mscript.computation.computationmodel.NumberFormatMapping;
import org.eclipselabs.mscript.computation.computationmodel.ui.ComputationModelUIPlugin;
import org.eclipselabs.mscript.typesystem.IntegerType;
import org.eclipselabs.mscript.typesystem.RealType;
import org.eclipselabs.mscript.typesystem.TypeSystemFactory;


/**
 * This is a simple wizard for creating a new model file.
 * <!-- begin-user-doc -->
 * <!-- end-user-doc -->
 * @generated NOT
 */
public class ComputationModelWizard extends Wizard implements INewWizard {
	/**
	 * The supported extensions for created files.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public static final List<String> FILE_EXTENSIONS =
		Collections.unmodifiableList(Arrays.asList(ComputationModelUIPlugin.INSTANCE.getString("_UI_ComputationModelEditorFilenameExtensions").split("\\s*,\\s*")));

	/**
	 * A formatted list of supported file extensions, suitable for display.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public static final String FORMATTED_FILE_EXTENSIONS =
		ComputationModelUIPlugin.INSTANCE.getString("_UI_ComputationModelEditorFilenameExtensions").replaceAll("\\s*,\\s*", ", ");

	/**
	 * This caches an instance of the model package.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ComputationModelPackage computationModelPackage = ComputationModelPackage.eINSTANCE;

	/**
	 * This caches an instance of the model factory.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ComputationModelFactory computationModelFactory = computationModelPackage.getComputationModelFactory();

	/**
	 * This is the file creation page.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected ComputationModelWizardNewFileCreationPage newFileCreationPage;

	/**
	 * Remember the selection during initialization for populating the default container.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected IStructuredSelection selection;

	/**
	 * Remember the workbench during initialization.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected IWorkbench workbench;

	/**
	 * This just records the information.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void init(IWorkbench workbench, IStructuredSelection selection) {
		this.workbench = workbench;
		this.selection = selection;
		setWindowTitle(ComputationModelUIPlugin.INSTANCE.getString("_UI_Wizard_label"));
		setDefaultPageImageDescriptor(ExtendedImageRegistry.INSTANCE.getImageDescriptor(ComputationModelUIPlugin.INSTANCE.getImage("full/wizban/NewComputationModel")));
	}

	/**
	 * Create a new model.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
	protected EObject createInitialModel() {
		ComputationModel computationModel = ComputationModelFactory.eINSTANCE.createComputationModel();
		
		FloatingPointFormat floatingPointFormat = ComputationModelFactory.eINSTANCE.createFloatingPointFormat();
		floatingPointFormat.setKind(FloatingPointFormatKind.BINARY64);
		computationModel.getNumberFormats().add(floatingPointFormat);
		
		FixedPointFormat fixedPointFormat = ComputationModelFactory.eINSTANCE.createFixedPointFormat();
		fixedPointFormat.setIntegerLength(31);
		computationModel.getNumberFormats().add(fixedPointFormat);
		
		NumberFormatMapping mapping = ComputationModelFactory.eINSTANCE.createNumberFormatMapping();
		RealType realType = TypeSystemFactory.eINSTANCE.createRealType();
		realType.setUnit(TypeSystemFactory.eINSTANCE.createUnit());
		mapping.setOwnedDataType(realType);
		mapping.setNumberFormat(floatingPointFormat);
		computationModel.getNumberFormatMappings().add(mapping);

		mapping = ComputationModelFactory.eINSTANCE.createNumberFormatMapping();
		IntegerType integerType = TypeSystemFactory.eINSTANCE.createIntegerType();
		integerType.setUnit(TypeSystemFactory.eINSTANCE.createUnit());
		mapping.setOwnedDataType(integerType);
		mapping.setNumberFormat(fixedPointFormat);
		computationModel.getNumberFormatMappings().add(mapping);

		return computationModel;
	}

	/**
	 * Do the work after everything is specified.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public boolean performFinish() {
		try {
			// Remember the file.
			//
			final IFile modelFile = getModelFile();

			// Do the work within an operation.
			//
			WorkspaceModifyOperation operation =
				new WorkspaceModifyOperation() {
					@Override
					protected void execute(IProgressMonitor progressMonitor) {
						try {
							// Create a resource set
							//
							ResourceSet resourceSet = new ResourceSetImpl();

							// Get the URI of the model file.
							//
							URI fileURI = URI.createPlatformResourceURI(modelFile.getFullPath().toString(), true);

							// Create a resource for this file.
							//
							Resource resource = resourceSet.createResource(fileURI);

							// Add the initial model object to the contents.
							//
							EObject rootObject = createInitialModel();
							if (rootObject != null) {
								resource.getContents().add(rootObject);
							}

							// Save the contents of the resource to the file system.
							//
							Map<Object, Object> options = new HashMap<Object, Object>();
							options.put(XMLResource.OPTION_ENCODING, "UTF-8");
							resource.save(options);
						}
						catch (Exception exception) {
							ComputationModelUIPlugin.INSTANCE.log(exception);
						}
						finally {
							progressMonitor.done();
						}
					}
				};

			getContainer().run(false, false, operation);

			// Select the new file resource in the current view.
			//
			IWorkbenchWindow workbenchWindow = workbench.getActiveWorkbenchWindow();
			IWorkbenchPage page = workbenchWindow.getActivePage();
			final IWorkbenchPart activePart = page.getActivePart();
			if (activePart instanceof ISetSelectionTarget) {
				final ISelection targetSelection = new StructuredSelection(modelFile);
				getShell().getDisplay().asyncExec
					(new Runnable() {
						 public void run() {
							 ((ISetSelectionTarget)activePart).selectReveal(targetSelection);
						 }
					 });
			}

			// Open an editor on the new file.
			//
			try {
				page.openEditor
					(new FileEditorInput(modelFile),
					 workbench.getEditorRegistry().getDefaultEditor(modelFile.getFullPath().toString()).getId());					 	 
			}
			catch (PartInitException exception) {
				MessageDialog.openError(workbenchWindow.getShell(), ComputationModelUIPlugin.INSTANCE.getString("_UI_OpenEditorError_label"), exception.getMessage());
				return false;
			}

			return true;
		}
		catch (Exception exception) {
			ComputationModelUIPlugin.INSTANCE.log(exception);
			return false;
		}
	}

	/**
	 * This is the one page of the wizard.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated NOT
	 */
	public class ComputationModelWizardNewFileCreationPage extends WizardNewFileCreationPage {
		/**
		 * Pass in the selection.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public ComputationModelWizardNewFileCreationPage(String pageId, IStructuredSelection selection) {
			super(pageId, selection);
		}

		/**
		 * The framework calls this to see if the file is correct.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		@Override
		protected boolean validatePage() {
			if (super.validatePage()) {
				String extension = new Path(getFileName()).getFileExtension();
				if (extension == null || !FILE_EXTENSIONS.contains(extension)) {
					String key = FILE_EXTENSIONS.size() > 1 ? "_WARN_FilenameExtensions" : "_WARN_FilenameExtension";
					setErrorMessage(ComputationModelUIPlugin.INSTANCE.getString(key, new Object [] { FORMATTED_FILE_EXTENSIONS }));
					return false;
				}
				return true;
			}
			return false;
		}

		/**
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		public IFile getModelFile() {
			return ResourcesPlugin.getWorkspace().getRoot().getFile(getContainerFullPath().append(getFileName()));
		}
	}

	/**
	 * The framework calls this to create the contents of the wizard.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
		@Override
	public void addPages() {
		// Create a page, set the title, and the initial model file name.
		//
		newFileCreationPage = new ComputationModelWizardNewFileCreationPage("Whatever", selection);
		newFileCreationPage.setTitle(ComputationModelUIPlugin.INSTANCE.getString("_UI_ComputationModelWizard_label"));
		newFileCreationPage.setDescription(ComputationModelUIPlugin.INSTANCE.getString("_UI_ComputationModelWizard_description"));
		newFileCreationPage.setFileName(ComputationModelUIPlugin.INSTANCE.getString("_UI_ComputationModelEditorFilenameDefaultBase") + "." + FILE_EXTENSIONS.get(0));
		addPage(newFileCreationPage);

		// Try and get the resource selection to determine a current directory for the file dialog.
		//
		if (selection != null && !selection.isEmpty()) {
			// Get the resource...
			//
			Object selectedElement = selection.iterator().next();
			if (selectedElement instanceof IResource) {
				// Get the resource parent, if its a file.
				//
				IResource selectedResource = (IResource)selectedElement;
				if (selectedResource.getType() == IResource.FILE) {
					selectedResource = selectedResource.getParent();
				}

				// This gives us a directory...
				//
				if (selectedResource instanceof IFolder || selectedResource instanceof IProject) {
					// Set this for the container.
					//
					newFileCreationPage.setContainerFullPath(selectedResource.getFullPath());

					// Make up a unique new name here.
					//
					String defaultModelBaseFilename = ComputationModelUIPlugin.INSTANCE.getString("_UI_ComputationModelEditorFilenameDefaultBase");
					String defaultModelFilenameExtension = FILE_EXTENSIONS.get(0);
					String modelFilename = defaultModelBaseFilename + "." + defaultModelFilenameExtension;
					for (int i = 1; ((IContainer)selectedResource).findMember(modelFilename) != null; ++i) {
						modelFilename = defaultModelBaseFilename + i + "." + defaultModelFilenameExtension;
					}
					newFileCreationPage.setFileName(modelFilename);
				}
			}
		}
	}

	/**
	 * Get the file from the page.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public IFile getModelFile() {
		return newFileCreationPage.getModelFile();
	}

}
