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

import com.onaro.client.leekui.runtime.OnaroAdapterUtils;
import com.onaro.sanscreen.client.ejb.logging.UsageLog;
import com.onaro.sanscreen.client.ejb.logging.UsageLogType;
import com.onaro.sanscreen.client.view.ActionFactory.ActionInitInfo;
import com.onaro.sanscreen.client.view.ViewDirector;
import com.onaro.sanscreen.client.view.selection.ObjectSelectionModel;
import com.onaro.sanscreen.server.interfaces.DataObjectTypeEnum;
import com.onaro.sanscreen.server.interfaces.data.IDataObjectType;
import com.onaro.util.IllegalInitException;
import com.onaro.util.jfc.date.TimeSpan;
import com.onaro.util.launch.LaunchUrl;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.eclipse.core.runtime.IAdaptable;

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

/**
 * Action to display the Insight web page corresponding to the selected object.
 */
public class VisitWebPageAction extends SingleSelectionAction {
    public static final String ID = "VisitWebPage"; //$NON-NLS-1$
    public static final String RESOURCE = "menu.performance.inventory.visit.web.page"; //$NON-NLS-1$

    private static final Logger logger = LogManager.getLogger (VisitWebPageAction.class);
    private static final long serialVersionUID = 1L;
    private static final String URN_FORMAT = "#assets/%s/%d"; //$NON-NLS-1$
    private static final String URN_TIMESPAN_FORMAT = "#assets/%s/%d?fromTime=%d&toTime=%d"; //$NON-NLS-1$

    // TODO: Query web UI to determine which object types have a web page and the URN for each page.
    private static final Map<DataObjectTypeEnum, String> PAGE_MAP =
            new HashMap<DataObjectTypeEnum, String>();
    static {
        // TEMP: For now, the supported web pages are hard-coded.
        PAGE_MAP.put (DataObjectTypeEnum.APPLICATION, "applications"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.DATA_STORE, "dataStores"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.DISK, "disks"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.HOST, "hosts"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.INTERNAL_VOLUME, "internalVolumes"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.QTREE, "qtrees"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.STORAGE, "storages"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.STORAGE_NODE, "storageNodes"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.STORAGE_POOL, "storagePools"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.VIRTUAL_MACHINE, "virtualMachines"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.VIRTUAL_MACHINE_DISK, "vmdks"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.VOLUME, "volumes"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.SWITCH, "switches"); //$NON-NLS-1$
        PAGE_MAP.put (DataObjectTypeEnum.PORT, "ports"); //$NON-NLS-1$
    }

    /**
     * Create action to show web page for selection
     * @param actionInitInfo Provides action command label
     * @param resources {@link ResourceBundle}
     * @param targetView View on which the action is invoked
     * @throws IllegalInitException
     */
    public VisitWebPageAction (ActionInitInfo actionInitInfo, ResourceBundle resources,
            ViewDirector targetView) throws IllegalInitException {
        super (actionInitInfo, resources, targetView);
    }

    /**
     * Indicates if action can be performed on an adaptable, i.e., whether the menu command
     * should be enabled.
     * @param adaptable data object whose web page is to be visited
     * @return {@code true} if action can be performed
     */
    public static boolean hasPage (IAdaptable adaptable) {
        if (adaptable == null) {
            return false;
        }

        // Ensure a DataObject is selected.
        IDataObjectType dataObjectType = OnaroAdapterUtils.getAdapter (adaptable, IDataObjectType.class);
        if (dataObjectType == null) {
            return false;
        }

        // Ensure selected data object has a web page.
        DataObjectTypeEnum typeEnum = dataObjectType.getDataObjectTypeEnum();
        return PAGE_MAP.containsKey (typeEnum);
    }

    /**
     * Visits the web page corresponding to an adaptable (data object).
     * @param adaptable data object whose web page is to be visited
     * @param view view in which action is performed (used for logging action)
     * @param timespan {@link TimeSpan} for which performance data should be displayed;
     * may be {@code null} to indicate default time span
     */
    public static void visitPage (IAdaptable adaptable, ViewDirector view, TimeSpan timespan) {
        if (adaptable == null) {
            logger.error ("Can't visit web page. No object is selected."); //$NON-NLS-1$
            return;
        }

        // Get object type.
        IDataObjectType dataObjectType = OnaroAdapterUtils.getAdapter (adaptable, IDataObjectType.class);
        DataObjectTypeEnum typeEnum = dataObjectType.getDataObjectTypeEnum();

        // Get object ID.
        final Long objectId = OnaroAdapterUtils.getAdapter (adaptable, Long.class);
        if (objectId == null) {
            logger.error ("Can't visit web page. Object ID is null"); //$NON-NLS-1$
            return;
        }

        // Launch web site.
        String urlStr = getUrl (typeEnum, objectId, timespan);
        if (urlStr != null) {
            LaunchUrl.launch (urlStr);
        }

        // Log usage.
        String objectTypeDisplay = dataObjectType.getDataObjectClass().getSimpleName();
        UsageLog.log (UsageLogType.VISIT_WEB_PAGE,
                "targetView", view.getName(), //$NON-NLS-1$
                "targetObjectType", objectTypeDisplay); //$NON-NLS-1$
    }

    /**
     * Gets the OCI URL for a data object.
     * @param typeEnum {@link DataObjectTypeEnum}
     * @param objectId
     * @param timespan {@link TimeSpan} for which performance data should be displayed;
     * may be {@code null} to indicate default time span
     * @return URL string
     */
    public static String getUrl (DataObjectTypeEnum typeEnum, Long objectId, TimeSpan timespan) {
        // Get web page resource for object type.
        String resource = PAGE_MAP.get (typeEnum);
        if (resource == null) {
            // isSelected method should have prevented getting here.
            logger.error ("Can't visit web page for selection type " + typeEnum.name()); //$NON-NLS-1$
            return null;
        }

        // Compose URL.
        final String urnStr = timespan == null? String.format (URN_FORMAT, resource, objectId):
            String.format (URN_TIMESPAN_FORMAT, resource, objectId,
                    Long.valueOf(timespan.getFromTime().getTime()),
                    Long.valueOf(timespan.getToTime().getTime()));
        return LaunchUrl.makeUrlRelativeToWebUi (urnStr);
    }

    @Override
    protected boolean isSelected (ObjectSelectionModel selectionModel) {
        return hasPage (selectionModel.getFirstSelectedAdaptable());
    }

    @Override
    public void actionPerformed (ActionEvent e) {
        visitPage (getSelectedAdaptable(), targetView, targetView.getNavigationInfo().getTimeSpan());
    }
}