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package org.ufcspa.simdecs.diagram.mb;

import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import javax.el.MethodExpression;
import javax.faces.event.ActionEvent;
import javax.faces.event.MethodExpressionActionListener;
import org.primefaces.component.menu.Menu;
import org.primefaces.component.menuitem.MenuItem;
import org.primefaces.model.DefaultMenuModel;
import org.primefaces.model.MenuModel;
import org.ufcspa.simdecs.diagram.elements.Node;
import org.ufcspa.simdecs.diagram.elements.NodeElement;
import org.ufcspa.simdecs.diagram.elements.NodeTextProperty;
import org.ufcspa.simdecs.diagram.elements.SwimLane;
import org.ufcspa.simdecs.diagram.mb.beans.PropertyEditorBean;
import org.ufcspa.simdecs.diagram.util.ReflectionUtils;

/**
 *
 * @author maroni
 */
public class EditNode extends DefaultManagedBean {

    private final String BASE_ELEMENT_PACKAGE = "org.ufcspa.simdecs.diagram.elements";
    private MenuModel menuActionList;
    private EditDiagram editDiagram;
    private Class currentNodeClass;
    private List<PropertyEditorBean> properties;
    private SwimLane currentSwimLane;

    public EditNode() {
        menuActionList = new DefaultMenuModel();
        properties = new ArrayList<PropertyEditorBean>();
    }
    
    public EditDiagram getEditDiagram() {
        return editDiagram;
    }

    public void setEditDiagram(EditDiagram editDiagram) {
        this.editDiagram = editDiagram;
    }

    public MenuModel getMenuActionList() {
        return menuActionList;
    }

    public void setMenuActionList(MenuModel menuActionList) {
        this.menuActionList = menuActionList;
    }

    public void prepareActionMenu() throws ClassNotFoundException, IOException, NoSuchMethodException, IllegalAccessException, InstantiationException, IllegalArgumentException, InvocationTargetException {
        String pActorID = getTextParameter("pActorID");
        currentSwimLane = editDiagram.getDiagramManager().getSwimLane(pActorID);

        menuActionList = new DefaultMenuModel();

        for(Class cclass: ReflectionUtils.getClasses(BASE_ELEMENT_PACKAGE)) {
            if (cclass.getAnnotation(NodeElement.class) != null) {
                Constructor nodeConstructor = cclass.getConstructor(new Class[]{String.class, Locale.class});
                Node node = (Node) nodeConstructor.newInstance(getMessageBundle(), getLocale());

                if (currentSwimLane.getNodes().isEmpty() && !node.isFirst())
                    continue;
                
                if (!node.isGrantedOnThisSwimLane(currentSwimLane))
                    continue;
                LinkedList nodes = currentSwimLane.getNodes();
                if (nodes != null && !nodes.isEmpty() && !node.isGrantedAfterThisNode((Node)nodes.getLast()))
                    continue;
                
                MenuItem item = new MenuItem();
                item.setValue(node.getName());
                item.setId("menuItem-" + node.getId());
                item.setOnstart("dialogAddNodeMenu.hide();");
                item.setOncomplete("dialogEditNodeMenu.show();");
                item.setUpdate("fEditNodeMenu");

                MethodExpression actionExpression = getFacesContext().getApplication().getExpressionFactory().createMethodExpression(getFacesContext().getELContext(),
                        "#{editNode.processAddNode}",
                        null,
                        new Class[]{ActionEvent.class});

                item.addActionListener(new MethodExpressionActionListener(actionExpression));
                menuActionList.addMenuItem(item);
            }
        }
        
        Menu menu = (Menu) getComponentById("fAddNodeMenu:dinamycAddNodeMenu");
        menu.getChildren().clear();
        menu.clearInitialState();
        menu.setModel(menuActionList);
        menu.buildMenuFromModel();
    }

    public void processAddNode(ActionEvent event) throws ClassNotFoundException {
        String callerID = event.getComponent().getClientId();
        String callerClassStrName = callerID.substring(callerID.indexOf("-") + 1, callerID.indexOf("-", callerID.indexOf("-") + 1));
        currentNodeClass = Class.forName(BASE_ELEMENT_PACKAGE + '.' + callerClassStrName);

        properties = new ArrayList<PropertyEditorBean>();
        for (Field field : currentNodeClass.getDeclaredFields()) {
            NodeTextProperty textAnnotation = field.getAnnotation(NodeTextProperty.class);

            if (textAnnotation != null) {
                PropertyEditorBean property = new PropertyEditorBean();
                property.setReflectionField(field);
                property.setName(getResourceMessage(textAnnotation.namei18n()));
                property.setMinLength(textAnnotation.minLength());
                property.setMaxLength(textAnnotation.maxLength());
                property.setRequired(textAnnotation.required());
                properties.add(property);
            }
        }

        Menu menu = (Menu) getComponentById("fAddNodeMenu:dinamycAddNodeMenu");
    }
 
    public void addNode() throws NoSuchMethodException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
        Constructor nodeConstructor = currentNodeClass.getConstructor(new Class[]{String.class, Locale.class});
        Node node = (Node) nodeConstructor.newInstance(getMessageBundle(), getLocale());
        
        for (PropertyEditorBean property : properties) {
            Method acessor = ReflectionUtils.getSetterMethod(currentNodeClass, property.getReflectionField());
            acessor.invoke(node, property.getValue());
        }
        
        currentSwimLane.addNode(node);
        
    }

    public List<PropertyEditorBean> getProperties() {
        return properties;
    }

    public void setProperties(List<PropertyEditorBean> properties) {
        this.properties = properties;
    }


}