package org.gcube.gcat.moderation.thread.social;

import java.io.StringWriter;
import java.util.Set;

import org.gcube.common.authorization.utils.manager.SecretManager;
import org.gcube.common.authorization.utils.manager.SecretManagerProvider;
import org.gcube.common.authorization.utils.secret.Secret;
import org.gcube.gcat.api.moderation.CMItemStatus;
import org.gcube.gcat.api.moderation.Moderated;
import org.gcube.gcat.moderation.thread.ModerationThread;
import org.gcube.gcat.social.Message;
import org.gcube.gcat.social.SocialMessage;
import org.gcube.gcat.social.SocialUsers;
import org.gcube.gcat.utils.Constants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Luca Frosini (ISTI - CNR)
 */
public class SocialMessageModerationThread extends ModerationThread {

	private static final Logger logger = LoggerFactory.getLogger(SocialMessageModerationThread.class);
	
	protected StringBuffer getMainItemInfo(CMItemStatus cmItemStatus) {
		StringBuffer stringBuffer = new StringBuffer();
		stringBuffer.append("Status: ");
		stringBuffer.append(cmItemStatus.getFancyValue());
		stringBuffer.append("\n");
		stringBuffer.append("Title: ");
		stringBuffer.append(itemTitle);
		stringBuffer.append("\n");
		stringBuffer.append("Name: ");
		stringBuffer.append(itemName);
		stringBuffer.append("\n");
		stringBuffer.append("ID: ");
		stringBuffer.append(itemID);
		stringBuffer.append("\n");
		stringBuffer.append("URL: ");
		stringBuffer.append(itemURL);
		stringBuffer.append("\n\n");
		return stringBuffer;
	}
	
	public void postItemCreated() throws Exception{
		String fullName = ckanUser.getNameSurname();
		CMItemStatus cmItemStatus = CMItemStatus.PENDING;
		StringBuffer stringBuffer = getMainItemInfo(cmItemStatus);
		
		stringBuffer.append("Message:\n");
		stringBuffer.append(fullName);
		stringBuffer.append(" created '");
		stringBuffer.append(itemTitle);
		stringBuffer.append("'. It is now in ");
		stringBuffer.append(cmItemStatus.getFancyValue());
		stringBuffer.append(" state and must be moderated.");
		
		postMessage(cmItemStatus, stringBuffer.toString());
		
	}

	public void postItemUpdated() throws Exception {
		String fullName = ckanUser.getNameSurname();
		CMItemStatus cmItemStatus = CMItemStatus.PENDING;
		StringBuffer stringBuffer = getMainItemInfo(cmItemStatus);
		
		stringBuffer.append("Message:\n");
		stringBuffer.append(fullName);
		stringBuffer.append(" updated '");
		stringBuffer.append(itemTitle);
		stringBuffer.append("'. It is now in ");
		stringBuffer.append(cmItemStatus.getFancyValue());
		stringBuffer.append(" state and must be moderated.");
		
		postMessage(cmItemStatus, stringBuffer.toString());
	}
	
	protected StringBuffer addUserWithRole(String fullName, String role, StringBuffer stringBuffer) {
		stringBuffer.append(fullName);
		stringBuffer.append(" [");
		stringBuffer.append(role);
		stringBuffer.append("] ");
		return stringBuffer;
	}
	
	public void postItemRejected(String userMessage) throws Exception {
		String fullName = ckanUser.getNameSurname();
		CMItemStatus cmItemStatus = CMItemStatus.REJECTED;
		
		StringBuffer stringBuffer = getMainItemInfo(cmItemStatus);
		
		stringBuffer.append("Message:\n");
		stringBuffer = addUserWithRole(fullName, Moderated.CATALOGUE_MODERATOR, stringBuffer);
		stringBuffer.append("rejected '");
		stringBuffer.append(itemTitle);
		stringBuffer.append("'.");
		stringBuffer.append(" The author can delete or update it.");
		
		if(userMessage!=null && userMessage.length()>0) {
			stringBuffer.append("\n\n");
			stringBuffer = addUserWithRole(fullName, Moderated.CATALOGUE_MODERATOR, stringBuffer);
			stringBuffer.append("added the following comment:\n");
			stringBuffer.append(userMessage);
		}
		
		postMessage(cmItemStatus, stringBuffer.toString());
	}
	
	public void postItemApproved(String userMessage) throws Exception{
		String fullName = ckanUser.getNameSurname();
		CMItemStatus cmItemStatus = CMItemStatus.APPROVED;
		
		StringBuffer stringBuffer = getMainItemInfo(cmItemStatus);
		
		stringBuffer.append("Message:\n");
		stringBuffer = addUserWithRole(fullName, Moderated.CATALOGUE_MODERATOR, stringBuffer);
		stringBuffer.append("approved the '");
		stringBuffer.append(itemTitle);
		stringBuffer.append("'.");
		stringBuffer.append(" It is now available in the catalogue at ");
		stringBuffer.append(itemURL);
		
		if(userMessage!=null && userMessage.length()>0) {
			stringBuffer.append("\n\n");
			stringBuffer = addUserWithRole(fullName, Moderated.CATALOGUE_MODERATOR, stringBuffer);
			stringBuffer.append("added the following comment:\n");
			stringBuffer.append(userMessage);
		}
		
		postMessage(cmItemStatus, stringBuffer.toString());
	}
	
	
	protected String getSubject(CMItemStatus cmItemStatus) {
		StringWriter stringWriter = new StringWriter();
		stringWriter.append("[Catalogue Service] ");
		stringWriter.append(itemTitle);
		stringWriter.append(" (name:");
		stringWriter.append(itemName);
		stringWriter.append(" - id:");
		stringWriter.append(itemID);
		stringWriter.append(")");
		return stringWriter.toString(); 
	}
	
	protected Message getMessage(CMItemStatus cmItemStatus, String messageString) throws Exception {
		Message message = new Message(); 
		message.setMessage(messageString);
		message.setSubject(getSubject(cmItemStatus));
		Set<String> moderators = SocialUsers.getUsernamesByRole(Moderated.CATALOGUE_MODERATOR);
		message.setUsers(moderators);
		return message;
	}
	
	@Override
	protected void postMessage(CMItemStatus cmItemStatus, String messageString) throws Exception {
		SecretManager secretManager = SecretManagerProvider.instance.get();
		String username = secretManager.getUser().getUsername();
		Message message = getMessage(cmItemStatus, messageString);
		message.addUser(username);
		Secret secret = Constants.getCatalogueSecret();
		secretManager.startSession(secret);
		try {
			sendMessage(message);
		}finally {
			secretManager.endSession();
		}
	}

	@Override
	public void postUserMessage(CMItemStatus cmItemStatus, String userMessage) throws Exception {
		String fullName = ckanUser.getNameSurname();
		StringBuffer stringBuffer = getMainItemInfo(cmItemStatus);
		stringBuffer = addUserWithRole(fullName, isItemAuthor() ? "Author" : Moderated.CATALOGUE_MODERATOR, stringBuffer);
		stringBuffer.append("sent the following comment:\n");
		stringBuffer.append(userMessage);
		Message message = getMessage(cmItemStatus, stringBuffer.toString());
		SecretManager secretManager = SecretManagerProvider.instance.get();
		String username = secretManager.getUser().getUsername();
		message.addUser(username);
		Secret secret = Constants.getCatalogueSecret();
		secretManager.startSession(secret);
		try {
			sendMessage(message);
		}finally {
			secretManager.endSession();
		}
	}

	protected void sendMessage(Message message) throws Exception {
		SocialMessage socialMessage = new SocialMessage();
		socialMessage.setMessage(message);
		socialMessage.start();
	}
	
	@Override
	protected void createModerationThread() throws Exception {
		// Nothing to do 
	}

}