/**
 * 
 */
package org.gcube.portlets.user.newsfeed.client.templates;

import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;

import org.gcube.portal.databook.client.GCubeSocialNetworking;
import org.gcube.portal.databook.shared.Comment;
import org.gcube.portal.databook.shared.Feed;
import org.gcube.portal.databook.shared.UserInfo;
import org.gcube.portlets.user.newsfeed.client.event.AddLikeEvent;
import org.gcube.portlets.user.newsfeed.client.event.DeleteCommentEvent;
import org.gcube.portlets.user.newsfeed.client.event.DeleteFeedEvent;
import org.gcube.portlets.user.newsfeed.client.event.SeeCommentsEvent;
import org.gcube.portlets.user.newsfeed.client.event.SeeLikesEvent;
import org.gcube.portlets.user.newsfeed.client.event.StopTimerEvent;
import org.gcube.portlets.user.newsfeed.client.panels.NewsFeedPanel;
import org.gcube.portlets.user.newsfeed.shared.EnhancedFeed;
import org.gcube.portlets.user.wsmail.client.forms.MailForm;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.RunAsyncCallback;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.MouseOutEvent;
import com.google.gwt.event.dom.client.MouseOverEvent;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * @author Massimiliano Assante. ISTI-CNR
 *
 */
public class TweetTemplate extends Composite {

	private static TweetTemplateUiBinder uiBinder = GWT
			.create(TweetTemplateUiBinder.class);

	interface TweetTemplateUiBinder extends UiBinder<Widget, TweetTemplate> {
	}


	public static final String loading = GWT.getModuleBaseURL() + "../images/loading-comments.gif";

	private static final int MAX_SHOWTEXT_LENGTH = 256;

	private EnhancedFeed myFeed;
	private UserInfo myUserInfo;

	private HandlerManager eventBus;
	private ArrayList<SingleComment> myComments;
	private boolean commentingDisabled = false;
	private boolean commentsFetched = false;
	private int totalComments = 0;
	private HTML showAllComments = new HTML();
	private boolean isAppFeed = false;
	/**
	 * tell if this tweet is belonging to the current user
	 */
	private boolean isUsers = false;

	@UiField
	HTML contentArea;
	@UiField
	HTML seeMore;
	@UiField
	HTML timeArea;
	@UiField
	HTML likeArea;
	@UiField
	HTML commentArea;
	@UiField
	HTML messageArea;
	@UiField
	Image avatarImage;
	@UiField
	HTMLPanel mainHTML;
	@UiField
	HTML likesNo;
	@UiField
	HTML commentsNo;
	@UiField
	VerticalPanel commentsPanel;
	@UiField 
	HTML closeImage;
	@UiField 
	VerticalPanel previewPanel;
	@UiField
	Label messageSeparator;

	/**
	 *  used when fetching tweets from server
	 * @param myUserInfo
	 * @param myFeed
	 * @param isUsers
	 * @param eventBus
	 */
	public TweetTemplate(UserInfo myUserInfo, EnhancedFeed myFeed, HandlerManager eventBus) {
		initWidget(uiBinder.createAndBindUi(this));
		this.myUserInfo = myUserInfo;
		this.myFeed = myFeed;
		isAppFeed = myFeed.getFeed().isApplicationFeed();
		Feed feed = myFeed.getFeed();
		if (feed.getUri() != null && feed.getUri().compareTo("") != 0 && feed.getLinkTitle() != null && feed.getLinkTitle().compareTo("") != 0 ) {
			previewPanel.add(new LinkPreviewer(feed.getLinkTitle(), feed.getLinkDescription(), feed.getLinkHost(), feed.getUriThumbnail(), feed.getUri()));
		}
		this.eventBus = eventBus;
		this.isUsers = myFeed.isUsers();
		myComments = new ArrayList<SingleComment>();
		if (isUsers) {
			closeImage.setStyleName("closeImage");
			closeImage.setTitle("Delete");
		}
		//show if the user has already liked this
		if (myFeed.isLiked()) {
			likeArea.setHTML(NewsFeedPanel.LIKED_LABEL);

		}
		else
			likeArea.setHTML("<a>" + NewsFeedPanel.LIKE_LABEL + "</a>");

		commentArea.setHTML("<a>" + NewsFeedPanel.COMMENT_LABEL + "</a>");

		String feedText = feed.getDescription();
		if ( (! feedText.startsWith("<span")) && feedText.length() > MAX_SHOWTEXT_LENGTH) {
			feedText = feedText.substring(0, MAX_SHOWTEXT_LENGTH) + "...";
			seeMore.setHTML("<a class=\"seemore\"> See More </a>");
		}

		if (! isAppFeed) {
			messageArea.setHTML("<a>" + NewsFeedPanel.MESSAGE_LABEL + "</a>");
			contentArea.setHTML("<a class=\"link\" href=\""+GCubeSocialNetworking.USER_PROFILE_LINK+"\">"+feed.getFullName()+"</a> " + feedText);
		}
		else {
			//			messageSeparator.setVisible(false);
			contentArea.setHTML("<a class=\"link\" href=\""+feed.getUri()+"\">"+feed.getFullName()+"</a> " + feedText);
			closeImage.setTitle("Delete this Application feed (Administrator Only)");
			if (isAppFeed) {
				try{
					String vreName = feed.getVreid().substring(feed.getVreid().lastIndexOf("/")+1);
					messageArea.setHTML("<a class=\"link\" href=\""+feed.getUri()+"\"> go App [" +vreName + "]</a>");
				}
				catch (Exception e) {}
			}
		}

		avatarImage.setUrl(feed.getThumbnailURL());
		avatarImage.setPixelSize(50, 50);
		try {
			String formattedTime = DateTimeFormat.getFormat("MMMM dd, h:mm a").format(feed.getTime());
			timeArea.setHTML(formattedTime);

			if (! feed.getCommentsNo().equals("0")) {
				commentsNo.setHTML(feed.getCommentsNo());
				commentsNo.setStyleName("comments-number");
				commentsNo.setTitle("People commented this.");
			} 
			if (! feed.getLikesNo().equals("0")) {
				likesNo.setHTML(feed.getLikesNo());
				likesNo.setStyleName("likes-number");
				likesNo.setTitle("Show People who have " + NewsFeedPanel.LIKED_LABEL + " this.");
			}
			totalComments = Integer.parseInt(feed.getCommentsNo());
		}
		catch (NumberFormatException e) {
			totalComments = 0;
		}
		catch (Exception e) {
			timeArea.setHTML("just now");
		}
		commentsPanel.setStyleName("commentsPanel");
		if (myFeed.getComments() != null && myFeed.getComments().size() > 0) {
			if (totalComments > 2) {
				showAllComments = getShowAllCommentsLink(totalComments);
				commentsPanel.add(showAllComments);
				commentsNo.setStyleName("show-comments-number");
				commentsNo.setTitle("Show all Comments");
			}
			for (Comment comment : myFeed.getComments()) {
				addComment(new SingleComment(comment, this, (comment.getUserid().equals(myUserInfo.getUsername()))));
			}			
		} 
	}

	/**
	 * used when getting tweets from the client
	 * @param myUserInfo
	 * @param feed
	 * @param eventBus
	 * @param hidden
	 */
	public TweetTemplate(UserInfo myUserInfo, EnhancedFeed feed, HandlerManager eventBus, boolean hidden) {
		this(myUserInfo, feed, eventBus);
		contentArea.getElement().getParentElement().getParentElement().setClassName("div-table-col content hidden");
	}

	@UiHandler("contentArea")
	public void onHover(MouseOutEvent event) {
		if (isUsers) 
			closeImage.removeStyleName("uiCloseButton");
	}

	@UiHandler("contentArea")
	public void onHover(MouseOverEvent event) {
		if (isUsers) 
			closeImage.addStyleName("uiCloseButton");
	}

	@UiHandler("closeImage") 
	void onDeleteFeedClick(ClickEvent e) {
		if (isUsers) 
			eventBus.fireEvent(new DeleteFeedEvent(this));
	}	


	@UiHandler("seeMore") 
	void onSeeMoreClick(ClickEvent e) {
		contentArea.setHTML("<a class=\"link\" href=\""+GCubeSocialNetworking.USER_PROFILE_LINK+"\">"+myFeed.getFeed().getFullName()+"</a> " + myFeed.getFeed().getDescription());
		seeMore.setHTML("");
	}	



	@UiHandler("likeArea")
	void onLikeClick(ClickEvent e) {
		if (!likeArea.getText().equals(NewsFeedPanel.LIKED_LABEL)) {
			try {
				eventBus.fireEvent(new StopTimerEvent(true));  //reset the refresh page timer

				int cur = Integer.parseInt(myFeed.getFeed().getLikesNo());
				cur++;
				if (cur == 1) {
					myFeed.getFeed().setLikesNo("1");
					likesNo.setHTML("1");
					likesNo.setStyleName("likes-number");
					likesNo.setTitle("People who have " + NewsFeedPanel.LIKED_LABEL + " this");
				} else {
					myFeed.getFeed().setLikesNo(""+cur);
					likesNo.setHTML(""+cur);
				}
				eventBus.fireEvent(new AddLikeEvent(this, myFeed.getFeed().getKey()));
				likeArea.setHTML(NewsFeedPanel.LIKED_LABEL);
			}
			catch (NumberFormatException ex) {
				likeArea.setHTML("Error on the server");
			}
		}
	}

	@UiHandler("commentArea")
	void onAddCommentClick(ClickEvent e) {
		if (! commentingDisabled) {
			if (! commentsFetched && totalComments > 2) { //if so, need to load all comments before adding a comment
				fireSeeComments(true);	
			}			
			showAddCommentForm();
			eventBus.fireEvent(new StopTimerEvent(false));  //stop the refresh page timer
		}
		else
			GWT.log("Commenting disabled");
	}

	@UiHandler("messageArea")
	void onMessageClick(ClickEvent e) {
		if (! isAppFeed) {
			eventBus.fireEvent(new StopTimerEvent(false));  //stop the refresh page timer
			final List<String> listToLogin = new ArrayList<String>();
			listToLogin.add(myFeed.getFeed().getEntityId());
			GWT.runAsync(new RunAsyncCallback() {
				@Override
				public void onSuccess() {
					new MailForm(listToLogin);
				}
				public void onFailure(Throwable reason) {
					Window.alert("Could not load this component: " + reason.getMessage());
				}   
			});
			
		}
	}

	public void showAddCommentForm() {
		final AddCommentTemplate toAdd = new AddCommentTemplate(this, myUserInfo, eventBus);			
		commentsPanel.add(toAdd);
		commentingDisabled = true;
		final Timer t = new Timer() {

			@Override
			public void run() {
				toAdd.setStyleName("comment-show");		
				toAdd.setFocus();

			}
		};
		t.schedule(10);
	}

	private HTML getShowAllCommentsLink(int commentsNo) {
		final HTML toReturn = new HTML("<div class=\"more-comment\"><a class=\"link\" style=\"font-size:11px;\">Show all " + commentsNo + " comments<a/></div>");
		toReturn.addClickHandler(new ClickHandler() {			
			@Override
			public void onClick(ClickEvent event) {
				fireSeeComments(false);			
			}
		});
		return toReturn;
	}

	private void fireSeeComments(boolean commentForm2Add) {
		eventBus.fireEvent(new SeeCommentsEvent(this, commentForm2Add));
	}

	@UiHandler("likesNo")
	void onSeeLikes(ClickEvent e) {
		eventBus.fireEvent(new SeeLikesEvent(myFeed.getFeed().getKey()));
	}
	@UiHandler("commentsNo")
	void onSeeComments(ClickEvent e) {
		fireSeeComments(false);
	}

	public void setcontentAreaStyle(String cssclass) {
		contentArea.getElement().getParentElement().getParentElement().setClassName("div-table-col content visible");
	}

	public boolean isCommenting() {
		return commentingDisabled;
	}

	public void setCommentingDisabled(boolean commenting) {
		this.commentingDisabled = commenting;
	}
	public String getFeedKey() {
		return myFeed.getFeed().getKey();
	}

	public void remove(Widget w) {
		mainHTML.remove(w);
	}

	public void addComment(SingleComment comment) {
		myComments.add(comment);
		commentsPanel.add(comment);
	}

	public void clearComments() {
		myComments.clear();
		commentsPanel.clear();
	}

	public void showLoadingComments() {
		showAllComments.setHTML("<div class=\"more-comment\"><img style=\"padding-right:15px;\"src=\""+ loading +"\" /></div>");
	}

	public boolean isCommentsFetched() {
		return commentsFetched;
	}

	public void setCommentsFetched(boolean commentsFetched) {
		this.commentsFetched = commentsFetched;
	}
	public HandlerManager getEventBus() {
		return eventBus;
	}
	public void updateCommentsNumberCount() {
		if (myComments.size() == 1) {
			commentsNo.setStyleName("comments-number");
			commentsNo.setTitle("Persons who have commented this.");
		}			
		commentsNo.setHTML(""+myComments.size());
	}
	public UserInfo getMyUserInfo() {
		return myUserInfo;
	}
	
	public String getMyFeedUserId() {
		return myFeed.getFeed().getEntityId();
	}
	
	public String getMyFeedText() {
		return myFeed.getFeed().getDescription();
	}
}