package org.gcube.portlets.user.geoportaldataviewer.server;

import static org.gcube.application.geoportal.client.GeoportalAbstractPlugin.statefulMongoConcessioni;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.gcube.application.geoportal.client.legacy.ConcessioniManagerI;
import org.gcube.application.geoportal.common.model.legacy.Concessione;
import org.gcube.application.geoportal.common.model.legacy.UploadedImage;
import org.gcube.application.geoportalcommon.ConvertToDataViewModel;
import org.gcube.application.geoportalcommon.shared.products.model.UploadedImageDV;
import org.gcube.portlets.user.geoportaldataviewer.server.util.SessionUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The Class ConcessioneImageUtil.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR francesco.mangiacrapa@isti.cnr.it
 * 
 *         Sep 7, 2021
 */
public class ConcessioneImageUtil {

	private static final Logger LOG = LoggerFactory.getLogger(ConcessioneImageUtil.class);

	/**
	 * Gets the uploaded images for id.
	 *
	 * @param httpServletRequest the http servlet request
	 * @param itemType           the item type
	 * @param itemId             the item id
	 * @param maxImages          the max images
	 * @return the uploaded images for id
	 * @throws Exception the exception
	 */
	public List<UploadedImageDV> getUploadedImagesForId(HttpServletRequest httpServletRequest, String itemType,
			String itemId, Integer maxImages) throws Exception {
		LOG.info("getUploadedImagesForId [itemId: " + itemId + ", itemType: " + itemType + "] called");

		if (itemType == null)
			throw new Exception("Invalid parameter. The itemType is null");

		if (itemId == null)
			throw new Exception("Invalid parameter. The itemId is null");

		List<UploadedImageDV> listUI = null;

		try {

			if (itemType.equalsIgnoreCase("concessione")) {

				LOG.info("Trying to get concessione for id " + itemId);
				SessionUtil.getCurrentContext(httpServletRequest, true);
				SessionUtil.getCurrentToken(httpServletRequest, true);
				ConcessioniManagerI concessioniManager = statefulMongoConcessioni().build();
				Concessione concessione = concessioniManager.getById(itemId);
				if (concessione != null) {
					LOG.info("For id " + itemId + ", got concessione " + concessione.getNome() + " from service");
					List<UploadedImage> images = concessione.getImmaginiRappresentative();

					if (images != null) {
						listUI = new ArrayList<UploadedImageDV>();
						int max = maxImages < images.size() ? maxImages : images.size();
						for (int i = 0; i < max; i++) {
							UploadedImageDV ui = ConvertToDataViewModel.toUploadedImage(images.get(i));
							listUI.add(ui);
						}
						LOG.info("For id " + itemId + ", got " + listUI.size() + " image/s");
					}
				} else
					throw new Exception("Concessione with id '" + itemId + "' not available");
			}

			return listUI;

		} catch (Exception e) {
			String erroMsg = UploadedImage.class.getSimpleName() + " not available for "
					+ Concessione.class.getSimpleName() + " with id " + itemId;
			LOG.error(erroMsg, e);
			throw new Exception(erroMsg);
		}

	}

}