package org.gcube.gcat.moderation.thread;

import org.gcube.com.fasterxml.jackson.databind.ObjectMapper;
import org.gcube.gcat.api.moderation.CMItemStatus;
import org.gcube.gcat.moderation.thread.social.SocialMessageModerationThread;
import org.gcube.gcat.persistence.ckan.CKANUser;

/**
 * @author Luca Frosini (ISTI - CNR)
 */
public abstract class ModerationThread {
	
	protected String itemID;
	protected String itemName;
	
	protected CKANUser ckanUser;
	protected ObjectMapper objectMapper;
	
	public static ModerationThread getDefaultInstance() {
		// return new FakeModerationThread();
		return new SocialMessageModerationThread();
	}
	
	public ModerationThread() {
		this.objectMapper = new ObjectMapper();
	}
	
	public void setItemCoordinates(String itemID, String itemName) {
		this.itemID = itemID;
		this.itemName = itemName;
	}
	
	public void setCKANUser(CKANUser ckanUser) {
		this.ckanUser = ckanUser;
	}
	
	/**
	 * The message is sent as gCat
	 * @param cmItemStatus
	 * @param message
	 * @throws Exception
	 */
	protected abstract void postMessage(CMItemStatus cmItemStatus, String message) throws Exception;
	
	/**
	 * The message is sent as User
	 * @param cmItemStatus
	 * @param userMessage
	 * @throws Exception
	 */
	public abstract void postUserMessage(CMItemStatus cmItemStatus, String userMessage) throws Exception;
	
	protected abstract void createModerationThread() throws Exception ;
	
	public void postItemCreated() throws Exception{
		createModerationThread();
		String username = ckanUser.getNameSurname();
		CMItemStatus cmItemStatus = CMItemStatus.PENDING;
		String message = String.format("@**%s** has created the item with name '%s' (id='%s'). The item is now in **%s** state and must be moderated.", 
				username, itemName, itemID, cmItemStatus.getFancyValue());
		postMessage(cmItemStatus, message);
	}

	public void postItemUpdated() throws Exception {
		String username = ckanUser.getNameSurname();
		CMItemStatus cmItemStatus = CMItemStatus.PENDING;
		String message = String.format("@**%s** has updated the item with name '%s' (id='%s'). The item is now in **%s** state and must be moderated.", 
				username, itemName, itemID, cmItemStatus.getFancyValue());
		postMessage(cmItemStatus, message);
	}
	
	public void postItemRejected(String userMessage) throws Exception {
		String username = ckanUser.getNameSurname();
		CMItemStatus cmItemStatus = CMItemStatus.REJECTED;
		String message = String.format("@**%s** has **%s** the item with name '%s' (id='%s'). The author can delete the item or update it to try to meet moderators requests if any.", 
				username, cmItemStatus.getFancyValue(), itemName, itemID);
		postMessage(cmItemStatus, message);
		postUserMessage(cmItemStatus, userMessage);
	}
	
	public void postItemApproved(String userMessage) throws Exception{
		String username = ckanUser.getNameSurname();
		CMItemStatus cmItemStatus = CMItemStatus.APPROVED;
		String message = String.format("@**%s** has **%s** the item with name '%s' (id='%s'). The item is now available in the catalogue.", 
				username, cmItemStatus.getFancyValue(), itemName, itemID);
		postMessage(cmItemStatus, message);
		postUserMessage(cmItemStatus, userMessage);
	}
}