/*
 * Copyright 2010-2020 James Pether Sörling
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *	$Id$
 *  $HeadURL$
*/
package com.hack23.cia.web.impl.ui.application.views.user.document.pagemode;

import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.lang3.StringUtils;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document.OutputSettings;
import org.jsoup.safety.Whitelist;
import org.springframework.security.access.annotation.Secured;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;

import com.hack23.cia.model.external.riksdagen.documentcontent.impl.DocumentContentData;
import com.hack23.cia.model.external.riksdagen.documentcontent.impl.DocumentContentData_;
import com.hack23.cia.model.internal.application.system.impl.ApplicationEventGroup;
import com.hack23.cia.service.api.DataContainer;
import com.hack23.cia.service.api.action.user.DocumentWordCountRequest;
import com.hack23.cia.service.api.action.user.DocumentWordCountResponse;
import com.hack23.cia.web.impl.ui.application.action.ViewAction;
import com.hack23.cia.web.impl.ui.application.views.common.labelfactory.LabelFactory;
import com.hack23.cia.web.impl.ui.application.views.common.sizing.ContentRatio;
import com.hack23.cia.web.impl.ui.application.views.common.viewnames.DocumentPageMode;
import com.vaadin.shared.ui.ContentMode;
import com.vaadin.ui.FormLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.Layout;
import com.vaadin.ui.MenuBar;
import com.vaadin.ui.Panel;
import com.vaadin.ui.VerticalLayout;

/**
 * The Class DocumentDataPageModContentFactoryImpl.
 */
@Component
public final class DocumentDataPageModContentFactoryImpl extends AbstractDocumentPageModContentFactoryImpl {

	/** The Constant DOCUMENT_DATA. */
	private static final String DOCUMENT_DATA = "Document Data";

	/** The Constant END_FONT. */
	private static final String END_FONT = "</font> ";

	/** The Constant END_FONT_SIZE. */
	private static final String END_FONT_SIZE = ")\">";

	/** The Constant END_PARAGRAPH. */
	private static final String END_PARAGRAPH = "</p>";

	/** The Constant MAX_RESULTS. */
	private static final int MAX_RESULTS = 60;

	/** The Constant START_FONT_SIZE. */
	private static final String START_FONT_SIZE = "<font size=\"";

	/** The Constant START_PARAGRAPH. */
	private static final String START_PARAGRAPH = "<p>";

	/**
	 * Instantiates a new document data page mod content factory impl.
	 */
	public DocumentDataPageModContentFactoryImpl() {
		super();
	}

	private static String createWordCloud(final Map<String, Integer> wordMap) {
		final StringBuilder builder = new StringBuilder();
		builder.append(START_PARAGRAPH);
		for (final Entry<String, Integer> entry : wordMap.entrySet()) {
			builder.append(START_FONT_SIZE).append(entry.getValue()).append(END_FONT_SIZE).append(entry.getKey())
					.append(END_FONT);
		}
		builder.append(END_PARAGRAPH);
		return builder.toString();
	}

	@Secured({ "ROLE_ANONYMOUS", "ROLE_USER", "ROLE_ADMIN" })
	@Override
	public Layout createContent(final String parameters, final MenuBar menuBar, final Panel panel) {
		final VerticalLayout panelContent = createPanelContent();

		final String pageId = getPageId(parameters);

		getDocumentMenuItemFactory().createDocumentMenuBar(menuBar, pageId);

		LabelFactory.createHeader2Label(panelContent, DOCUMENT_DATA);

		final DataContainer<DocumentContentData, String> documentContentDataDataContainer = getApplicationManager()
				.getDataContainer(DocumentContentData.class);

		final List<DocumentContentData> documentContentlist = documentContentDataDataContainer
				.getAllBy(DocumentContentData_.id, pageId);

		if (!documentContentlist.isEmpty()) {

			final Panel formPanel = new Panel();
			formPanel.setSizeFull();

			panelContent.addComponent(formPanel);

			final FormLayout formContent = new FormLayout();
			formPanel.setContent(formContent);

			final String cleanContent = Jsoup.clean(documentContentlist.get(0).getContent(), "", Whitelist.simpleText(),
					new OutputSettings().indentAmount(4));

			final Label htmlContent = new Label(cleanContent, ContentMode.PREFORMATTED);

			formContent.addComponent(htmlContent);

			final DocumentWordCountRequest documentWordCountRequest = new DocumentWordCountRequest();
			documentWordCountRequest.setDocumentId(pageId);
			documentWordCountRequest.setMaxResults(MAX_RESULTS);
			documentWordCountRequest.setSessionId(RequestContextHolder.currentRequestAttributes().getSessionId());
			final DocumentWordCountResponse resp = (DocumentWordCountResponse) getApplicationManager()
					.service(documentWordCountRequest);

			if (resp.getWordCountMap() != null) {
				final Label wordCloud = new Label(createWordCloud(resp.getWordCountMap()), ContentMode.HTML);
				formContent.addComponent(wordCloud);
			}

			panelContent.setExpandRatio(formPanel, ContentRatio.GRID);

		}

		panel.setContent(panelContent);
		getPageActionEventHelper().createPageEvent(ViewAction.VISIT_DOCUMENT_VIEW, ApplicationEventGroup.USER, NAME,
				parameters, pageId);

		return panelContent;

	}

	@Override
	public boolean matches(final String page, final String parameters) {
		return NAME.equals(page) && StringUtils.contains(parameters, DocumentPageMode.DOCUMENTDATA.toString());
	}

}