package org.eclipse.emf.refactor.metrics.generator;

import java.lang.reflect.InvocationTargetException;
import java.util.LinkedList;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectNature;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.emf.refactor.metrics.core.Metric;
import org.eclipse.emf.refactor.metrics.interfaces.IOperation;
import org.eclipse.emf.refactor.metrics.managers.MetricManager;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;

public class NewMetricWizardComposite extends Wizard implements INewWizard, INewMetricWizard {
	
	protected static final String TRANSFORMATIONS_DIR = "/transformations/";
	private final String WINDOW_TITLE = "New Metric";
	private MetricBasicDataWizardPage basicDataPage;
	private CompositeDataWizardPage compositePage;
	private String name, id, description, metamodel, context, jar;
	private LinkedList<IProject> projects;
	private IProject targetProject;

	public NewMetricWizardComposite() { }

	@Override
	public void init(IWorkbench workbench, IStructuredSelection selection) {
		initProjects();
	}
	
	@Override
	public void addPages() {
		setWindowTitle(WINDOW_TITLE);
		basicDataPage = new MetricBasicDataWizardPage();
		addPage(basicDataPage);
		compositePage = new CompositeDataWizardPage();
		addPage(compositePage);
	}
	
	@Override
	public boolean canFinish() {
		return (basicDataPage.isPageComplete() && compositePage.isPageComplete());
	}

	@Override
	public boolean performFinish() {
		try{
			getContainer().run(true, true, new IRunnableWithProgress(){
				public void run(IProgressMonitor monitor)throws InvocationTargetException, InterruptedException{
					GenerationManager.getInstance();
					GenerationManager.createNewMetric(monitor, getMetricInfo(), targetProject);
				}
			});
		}
		catch(InvocationTargetException e){
			e.printStackTrace();
			return false;
		}
		catch(InterruptedException e){
			e.printStackTrace();
			return false;
		}
		return true;
	}
	
	private void initProjects(){
		this.projects = new LinkedList<IProject>();
		IProject[] allProjects = ResourcesPlugin.getWorkspace().getRoot().getProjects();
		for (IProject project : allProjects) {
			if (project.isOpen()) {
				IProjectNature nature = null;
				try {
					nature = project.getNature("org.eclipse.pde.PluginNature");
				} catch (CoreException e) {
					e.printStackTrace();
				}
				if (null != nature) 
					this.projects.add(project);
			}
		}
	}
	
	private CompositeMetricInfo getMetricInfo() {
		MetricManager.getInstance();
		String proj = this.targetProject.getLocation().toString();
		Metric first = compositePage.getFirstMetric();
		Metric second = compositePage.getSecondMetric();
		String operationName = compositePage.getOperationName();
		IOperation operation = MetricManager.getOperation(operationName);
		CompositeMetricInfo info = new CompositeMetricInfo(this.name, this.id, this.description, 
						this.metamodel, this.context, proj, first, second, operation, getJar());
		return info;
	}
	
	
	private String getJar() {
		return jar;
	}
	
	public MetricBasicDataWizardPage getDataPage() {
		return basicDataPage;
	}
	
	public LinkedList<IProject> getProjects() {
		return projects;
	}
	
	public IProject getTargetProject() {
		return targetProject;
	}
	
	public String getMetamodel() {
		return metamodel;
	}

	public String getContext() {
		return context;
	}
	
	public void setName(String name) {
		this.name = name;
	}

	public void setId(String id) {
		this.id = id;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	public void setMetamodel(String metamodel) {
		this.metamodel = metamodel;
	}

	public void setContext(String context) {
		this.context = context;
	}

	public void setTargetProject(String projectName){
		for (IProject project : projects)
			if (project.getName().equals(projectName))
				this.targetProject = project;
	}

	public void setJar(String jar) {
		this.jar = jar;
	}
	
	public CompositeDataWizardPage getCompositePage() {
		return compositePage;
	}

	@Override
	public int getPageNumbers() {
		return 2;
	}

	@Override
	public WizardPage getSecondPage() {
		return this.compositePage;
	}

}