/**
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.exoplatform.applicationregistry.webui.component;

import java.util.Collections;
import java.util.List;

import javax.portlet.PortletPreferences;

import org.exoplatform.application.gadget.Gadget;
import org.exoplatform.application.gadget.GadgetRegistryService;
import org.exoplatform.application.registry.Application;
import org.exoplatform.application.registry.ApplicationCategory;
import org.exoplatform.application.registry.ApplicationRegistryService;
import org.exoplatform.applicationregistry.webui.Util;
import org.exoplatform.commons.serialization.api.annotations.Serialized;
import org.exoplatform.portal.application.PortalRequestContext;
import org.exoplatform.portal.config.model.ApplicationType;
import org.exoplatform.portal.webui.portal.UIPortal;
import org.exoplatform.web.application.ApplicationMessage;
import org.exoplatform.webui.application.WebuiRequestContext;
import org.exoplatform.webui.application.portlet.PortletRequestContext;
import org.exoplatform.webui.config.annotation.ComponentConfig;
import org.exoplatform.webui.config.annotation.EventConfig;
import org.exoplatform.webui.core.UIApplication;
import org.exoplatform.webui.core.UIContainer;
import org.exoplatform.webui.event.Event;
import org.exoplatform.webui.event.EventListener;
import org.exoplatform.webui.event.MonitorEvent;

/** Created by The eXo Platform SAS Author : Pham Thanh Tung thanhtungty@gmail.com Jun 24, 2008 */
@ComponentConfig(template = "app:/groovy/applicationregistry/webui/component/UIApplicationOrganizer.gtmpl", events = {
        @EventConfig(listeners = UIApplicationOrganizer.ShowCategoryActionListener.class),
        @EventConfig(listeners = UIApplicationOrganizer.ImportAllApplicationsActionListener.class, confirm = "UIOrganizer.msg.importAll"),
        @EventConfig(listeners = UIApplicationOrganizer.SelectApplicationActionListener.class),
        @EventConfig(listeners = UIApplicationOrganizer.AddCategoryActionListener.class),
        @EventConfig(listeners = UIApplicationOrganizer.RemoveCategoryActionListener.class, confirm = "UIOrganizer.msg.deleteCategory"),
        @EventConfig(listeners = UIApplicationOrganizer.EditCategoryActionListener.class),
        @EventConfig(listeners = UIApplicationOrganizer.AddApplicationActionListener.class),
        @EventConfig(listeners = UIApplicationOrganizer.RemoveApplicationActionListener.class, confirm = "UIOrganizer.msg.deleteApplication") })
@Serialized
public class UIApplicationOrganizer extends UIContainer {

    private ApplicationCategory selectedCategory;

    private List<ApplicationCategory> categories;

    private Application selectedApplication = null;

    private List<Application> applications;

    public UIApplicationOrganizer() throws Exception {
        reload();
    }

    public void reload() throws Exception {
        initApplicationCategories();
        if (categories == null || categories.isEmpty()) {
            selectedCategory = null;
            applications = null;
            selectedApplication = null;
            getChildren().clear();
            UIMessageBoard uiMessageBoard = addChild(UIMessageBoard.class, null, null);
            uiMessageBoard.setMessage(new ApplicationMessage("UIOrganizer.msg.noCategory", null));
        } else {
            setSelectedCategory(categories.get(0));
        }

        if (getParent() != null) {
            UIGadgetManagement gadgetManager = getParent().findFirstComponentOfType(UIGadgetManagement.class);
            if (gadgetManager != null)
                gadgetManager.reload();
        }

        PortalRequestContext portalContext = org.exoplatform.portal.webui.util.Util.getPortalRequestContext();
        UIPortal uiPortal = org.exoplatform.portal.webui.util.Util.getUIPortal();
        // TODO why use MonitorEvent that not just Event
        MonitorEvent<UIPortal> pnevent = new MonitorEvent<UIPortal>(uiPortal, "ChangeApplicationList", portalContext);
        uiPortal.broadcast(pnevent, Event.Phase.PROCESS);
    }

    public void initApplicationCategories() throws Exception {
        ApplicationRegistryService service = getApplicationComponent(ApplicationRegistryService.class);
        categories = service.getApplicationCategories(new Util.CategoryComparator());
    }

    public List<ApplicationCategory> getCategories() {
        return categories;
    }

    public ApplicationCategory getSelectedCategory() {
        return selectedCategory;
    }

    public void setSelectedCategory(String name) throws Exception {
        for (ApplicationCategory ele : categories) {
            if (ele.getName().equals(name)) {
                setSelectedCategory(ele);
                break;
            }
        }
    }

    public void setSelectedCategory(ApplicationCategory category) throws Exception {
        selectedCategory = category;
        if (category == null)
            return;
        applications = category.getApplications();
        if (applications == null || applications.isEmpty()) {
            setSelectedApplication(null);
            return;
        }
        Collections.sort(applications, new Util.ApplicationComparator());

        // Correct IconUrl of gadget
        GadgetRegistryService gadgetService = getApplicationComponent(GadgetRegistryService.class);
        for (Application app : applications) {
            if (ApplicationType.GADGET.equals(app.getType())) {
                Gadget gadget = gadgetService.getGadget(app.getApplicationName());
                if (gadget != null)
                    app.setIconURL(gadget.getThumbnail());
            }
        }

        setSelectedApplication(applications.get(0));
    }

    public ApplicationCategory getCategory(String name) {
        for (ApplicationCategory category : categories) {
            if (category.getName().equals(name)) {
                return category;
            }
        }
        return null;
    }

    public Application getSelectedApplication() {
        return selectedApplication;
    }

    public void setSelectedApplication(Application app) throws Exception {
        selectedApplication = app;
        if (selectedApplication == null) {
            getChildren().clear();
            UIMessageBoard uiMessageBoard = addChild(UIMessageBoard.class, null, null);
            uiMessageBoard.setMessage(new ApplicationMessage("UIOrganizer.msg.emptyCategory", null));
            return;
        }
        UIApplicationInfo uiAppInfo = getChild(UIApplicationInfo.class);
        if (uiAppInfo == null) {
            getChildren().clear();
            uiAppInfo = addChild(UIApplicationInfo.class, null, null);
        }
        uiAppInfo.setApplication(selectedApplication);
    }

    public List<Application> getApplications() {
        return applications;
    }

    public Application getApplication(String name) {
        for (Application ele : applications) {
            if (ele.getId().equals(name)) {
                return ele;
            }
        }
        return null;
    }

    public void selectApplication(String name) throws Exception {
        for (Application ele : applications) {
            if (ele.getId().equals(name)) {
                setSelectedApplication(ele);
                break;

            }
        }
    }

    public boolean isShowImport() {
        PortletRequestContext pcontext = (PortletRequestContext) WebuiRequestContext.getCurrentInstance();
        PortletPreferences pref = pcontext.getRequest().getPreferences();
        return Boolean.parseBoolean(pref.getValue("showImport", "true"));
    }

    public void processRender(WebuiRequestContext context) throws Exception {
        super.processRender(context);
    }

    public static class ShowCategoryActionListener extends EventListener<UIApplicationOrganizer> {

        public void execute(Event<UIApplicationOrganizer> event) throws Exception {
            String categoryName = event.getRequestContext().getRequestParameter(OBJECTID);
            WebuiRequestContext ctx = event.getRequestContext();
            UIApplicationOrganizer uiOrganizer = event.getSource();
            ApplicationRegistryService service = uiOrganizer.getApplicationComponent(ApplicationRegistryService.class);
            ApplicationCategory existingCate = service.getApplicationCategory(categoryName);
            if (existingCate == null) {
                UIApplication uiApp = ctx.getUIApplication();
                uiApp.addMessage(new ApplicationMessage("UIOrganizer.msg.categoryNoExist", null));
                uiOrganizer.reload();
                return;
            }
            uiOrganizer.setSelectedCategory(categoryName);
            ctx.addUIComponentToUpdateByAjax(uiOrganizer);
        }

    }

    public static class ImportAllApplicationsActionListener extends EventListener<UIApplicationOrganizer> {

        public void execute(Event<UIApplicationOrganizer> event) throws Exception {
            UIApplicationOrganizer uiOrganizer = event.getSource();
            ApplicationRegistryService service = uiOrganizer.getApplicationComponent(ApplicationRegistryService.class);

            service.importAllPortlets();
            service.importExoGadgets();
            uiOrganizer.reload();
            event.getRequestContext().addUIComponentToUpdateByAjax(uiOrganizer);
        }

    }

    public static class SelectApplicationActionListener extends EventListener<UIApplicationOrganizer> {

        public void execute(Event<UIApplicationOrganizer> event) throws Exception {
            WebuiRequestContext ctx = event.getRequestContext();
            String appName = ctx.getRequestParameter(OBJECTID);
            UIApplicationOrganizer uiOrganizer = event.getSource();
            Application selectedApp = uiOrganizer.getApplication(appName);
            ApplicationRegistryService service = uiOrganizer.getApplicationComponent(ApplicationRegistryService.class);
            String selectedAppId = selectedApp.getId();
            if (service.getApplication(selectedAppId) == null) {
                UIApplication uiApp = ctx.getUIApplication();
                uiApp.addMessage(new ApplicationMessage("UIOrganizer.msg.applicationNoExist", null));
                ApplicationCategory selectedCategory = uiOrganizer.getSelectedCategory();
                if (service.getApplicationCategory(selectedCategory.getName()) != null) {
                    uiOrganizer.setSelectedCategory(selectedCategory);
                } else {
                    uiOrganizer.reload();
                }
                return;
            }
            uiOrganizer.selectApplication(appName);
            ctx.addUIComponentToUpdateByAjax(uiOrganizer);
        }

    }

    public static class AddCategoryActionListener extends EventListener<UIApplicationOrganizer> {

        public void execute(Event<UIApplicationOrganizer> event) throws Exception {
            UIApplicationOrganizer uiOrganizer = event.getSource();
            uiOrganizer.getChildren().clear();
            uiOrganizer.addChild(UICategoryForm.class, null, null);
            event.getRequestContext().addUIComponentToUpdateByAjax(uiOrganizer);
        }

    }

    public static class RemoveCategoryActionListener extends EventListener<UIApplicationOrganizer> {

        public void execute(Event<UIApplicationOrganizer> event) throws Exception {
            UIApplicationOrganizer uiOrganizer = event.getSource();
            String name = event.getRequestContext().getRequestParameter(OBJECTID);
            UICategoryForm uiCategoryForm = uiOrganizer.getChild(UICategoryForm.class);
            if (uiCategoryForm != null) {
                ApplicationCategory edittingCategory = uiCategoryForm.getCategory();
                if (edittingCategory != null && edittingCategory.getName().equals(name)) {
                    UIApplication uiApp = event.getRequestContext().getUIApplication();
                    uiApp.addMessage(new ApplicationMessage("UIOrganizer.msg.deleteCategoryInUse", null));
                    return;
                }
            }
            ApplicationRegistryService service = uiOrganizer.getApplicationComponent(ApplicationRegistryService.class);
            if (service.getApplicationCategory(name) != null) {
                service.remove(uiOrganizer.getCategory(name));
            }
            uiOrganizer.reload();
            event.getRequestContext().addUIComponentToUpdateByAjax(uiOrganizer);
        }

    }

    public static class EditCategoryActionListener extends EventListener<UIApplicationOrganizer> {

        public void execute(Event<UIApplicationOrganizer> event) throws Exception {
            UIApplicationOrganizer uiOrganizer = event.getSource();
            String name = event.getRequestContext().getRequestParameter(OBJECTID);
            UICategoryForm uiCategoryForm = uiOrganizer.createUIComponent(UICategoryForm.class, null, null);
            uiCategoryForm.setValue(uiOrganizer.getCategory(name));
            uiOrganizer.getChildren().clear();
            uiOrganizer.addChild(uiCategoryForm);
            event.getRequestContext().addUIComponentToUpdateByAjax(uiOrganizer);
        }

    }

    public static class AddApplicationActionListener extends EventListener<UIApplicationOrganizer> {

        public void execute(Event<UIApplicationOrganizer> event) throws Exception {
            UIApplicationOrganizer uiOrganizer = event.getSource();
            uiOrganizer.getChildren().clear();
            uiOrganizer.addChild(UIAddApplicationForm.class, null, null);
            event.getRequestContext().addUIComponentToUpdateByAjax(uiOrganizer);
        }

    }

    public static class RemoveApplicationActionListener extends EventListener<UIApplicationOrganizer> {

        public void execute(Event<UIApplicationOrganizer> event) throws Exception {
            UIApplicationOrganizer uiOrganizer = event.getSource();
            String appName = event.getRequestContext().getRequestParameter(OBJECTID);
            UIApplicationForm uiApplicationForm = uiOrganizer.getChild(UIApplicationForm.class);
            if (uiApplicationForm != null) {
                Application app = uiApplicationForm.getApplication();
                if (app != null && app.getApplicationName().equals(appName)) {
                    UIApplication uiApp = event.getRequestContext().getUIApplication();
                    uiApp.addMessage(new ApplicationMessage("UIOrganizer.msg.deleteApplicationInUse", null));
                    return;
                }
            }
            ApplicationRegistryService service = uiOrganizer.getApplicationComponent(ApplicationRegistryService.class);
            Application app = uiOrganizer.getApplication(appName);
            if (service.getApplication(app.getId()) != null) {
                service.remove(app);
            }
            String cateName = uiOrganizer.getSelectedCategory().getName();
            uiOrganizer.reload();
            uiOrganizer.setSelectedCategory(cateName);
            event.getRequestContext().addUIComponentToUpdateByAjax(uiOrganizer);
        }

    }

}
