package com.onaro.sanscreen.client.view.actions;


import java.awt.event.ActionEvent;
import java.util.Map;
import java.util.ResourceBundle;

import javax.swing.Action;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import com.onaro.sanscreen.client.view.ActionFactory;
import com.onaro.sanscreen.client.view.selection.ObjectSelectionModel;
import com.onaro.util.IllegalInitException;
import com.onaro.util.jfc.ConfigurableAction;
import com.onaro.util.jfc.RoleRestrictedAction;


/**
 * An actoin that redirects to another action. Used when multiple instances of
 * a single actions are used in different cotexts.
 */
public class Redirect extends ConfigurableAction {

    private static final long serialVersionUID = 1L;

	/**
     *  The target action that is invoked when this action is invoked. Should be
     * resolved before its first usage.
     */
    private Action targetAction;

    /**
     * Name of the target action. Used to resolve the action to redirect to.
     */
    private String targetActionName;

    /**
     * Static reference to the system logger.
     */
    static Logger logger = LogManager.getLogger(Redirect.class);

    /**
     * Constucts a redirecting action.
     *
     * @param resources contains the action's properties
     * 
     */
    public Redirect(ActionFactory.ActionInitInfo actionInitInfo, ResourceBundle resources)
            throws IllegalInitException {
        super(actionInitInfo, resources);

        targetActionName = actionInitInfo.getProperty("targetAction"); //$NON-NLS-1$
        if (targetActionName == null || targetActionName.length() == 0) {
            throw new IllegalInitException("Missing target action name in redirect action " + actionInitInfo); //$NON-NLS-1$
        }
    }

    /**
     * Constucts a redirecting action.
     *
     * @param name the name of this action
     * @param targetActionName the name of the action to invoke when this action is invoked
     * @param resources contains the action's properties
     * 
     */
    public Redirect(String name, String targetActionName, ResourceBundle resources)
            throws IllegalInitException {
        super(name, resources);

        assert targetActionName != null : "Target action name cannot be null"; //$NON-NLS-1$
        this.targetActionName = targetActionName;
    }

    /**
     * When the action is performed, switch the views.
     *
     * @param event
     */
    public void actionPerformed(ActionEvent event) {
        assert targetAction != null : "Target action for name '" + targetActionName + "' wasn't resolved"; //$NON-NLS-1$ //$NON-NLS-2$
        targetAction.actionPerformed(event);
    }

    /**
     * the redirect action forwards the enable by selection, and sets its enable state according
     * to the result
     * @param selection
     */
    @Override
	public void setEnableBySelection(ObjectSelectionModel selection) {
        assert targetAction != null : "Target action for name '" + targetActionName + "' wasn't resolved"; //$NON-NLS-1$ //$NON-NLS-2$
        if( targetAction instanceof ConfigurableAction ) {
            if (targetAction instanceof RoleRestrictedAction && ((RoleRestrictedAction)targetAction).isRestricted()) {
                setEnabled(false);
            } else {
                ConfigurableAction configurableAction = (ConfigurableAction)targetAction;
                configurableAction.setEnableBySelection(selection);
                setEnabled( configurableAction.isEnabled() );
            }
        }
    }

    /**
     * Resolve the target action by searching it in the given map.
     *
     * @param actions map of action names to actions
     * 
     */
    public void resolve(Map<String,ConfigurableAction> actions) throws IllegalInitException {
        targetAction = actions.get(targetActionName);
        if (targetAction == null) {
            throw new IllegalInitException("Action '" + targetActionName + "' wasn't found at " + actions); //$NON-NLS-1$ //$NON-NLS-2$
        }
    }

   
}