package net.sourceforge.fenixedu.presentationTier.Action.base;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sourceforge.fenixedu.applicationTier.IUserView;
import net.sourceforge.fenixedu.applicationTier.Filtro.exception.FenixFilterException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.RootDomainObject;
import net.sourceforge.fenixedu.presentationTier.Action.resourceAllocationManager.utils.ServiceUtils;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import pt.ist.fenixWebFramework.security.UserView;

public abstract class FenixAction extends Action {

    protected static final RootDomainObject rootDomainObject = RootDomainObject.getInstance();

    private static final String ACTION_MESSAGES_REQUEST_KEY = "FENIX_ACTION_MESSAGES";

    protected IUserView getUserView(HttpServletRequest request) {
	return UserView.getUser();
    }

    protected Person getLoggedPerson(HttpServletRequest request) {
	final IUserView userView = getUserView(request);
	return userView == null ? null : userView.getPerson();
    }

    @Override
    public ActionForward execute(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	ActionMessages actionMessages = new ActionMessages();
	request.setAttribute(ACTION_MESSAGES_REQUEST_KEY, actionMessages);
	final ActionForward actionForward = super.execute(mapping, actionForm, request, response);
	actionMessages = (ActionMessages) request.getAttribute(ACTION_MESSAGES_REQUEST_KEY);
	if (!actionMessages.isEmpty()) {
	    saveMessages(request, actionMessages);
	    addMessages(request, actionMessages);
	}

	return actionForward;
    }

    protected void saveMessages(final HttpServletRequest request) {
	final ActionMessages actionMessages = (ActionMessages) request.getAttribute(ACTION_MESSAGES_REQUEST_KEY);
	if (actionMessages != null && !actionMessages.isEmpty()) {
	    saveMessages(request, actionMessages);
	}
    }

    protected ActionMessages getActionMessages(HttpServletRequest request) {
	ActionMessages actionMessages = (ActionMessages) request.getAttribute(ACTION_MESSAGES_REQUEST_KEY);
	if (actionMessages == null) {
	    actionMessages = new ActionMessages();
	    request.setAttribute(ACTION_MESSAGES_REQUEST_KEY, actionMessages);
	}
	return actionMessages;
    }

    protected boolean hasActionMessage(HttpServletRequest request) {
	final ActionMessages actionMessages = (ActionMessages) request.getAttribute(ACTION_MESSAGES_REQUEST_KEY);
	return actionMessages != null && !actionMessages.isEmpty();
    }

    protected void addActionMessage(HttpServletRequest request, String key, String... args) {
	this.getActionMessages(request).add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage(key, args));
    }

    protected Object executeService(final String serviceName, final Object[] serviceArgs) throws FenixFilterException,
	    FenixServiceException {
	return ServiceUtils.executeService(serviceName, serviceArgs);
    }

    protected void addErrorMessage(HttpServletRequest request, String property, String key, String... args) {
	final ActionMessages messages = getErrors(request);
	messages.add(property, new ActionMessage(key, args));
	saveErrors(request, messages);
    }

}