package org.gcube.gcat.utils;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;

import org.gcube.datacatalogue.ckanutillibrary.server.DataCatalogue;
import org.gcube.datacatalogue.ckanutillibrary.server.utils.url.EntityContext;
import org.gcube.gcat.persistence.ckan.CKAN;
import org.gcube.gcat.utils.HTTPCall.HTTPMETHOD;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

public class URIResolver {
	
	private static final String CATALOGUE_CONTEXT = "gcube_scope";
	private static final String ENTITY_TYPE = "entity_context";
	private static final String ENTITY_NAME = "entity_name";
	private static final String CATALOGUE_PLAIN_URL = "clear_url";
	
	protected ObjectMapper objectMapper;
	
	public URIResolver() {
		this.objectMapper = new ObjectMapper();
	}
	
	public String getCatalogueItemURL(String name) {
		try {
			DataCatalogue dataCatalogue = CKAN.getCatalogue();
			String uriResolverURL = dataCatalogue.getUriResolverUrl();
			
			HTTPCall httpCall = new HTTPCall(uriResolverURL);
			
			ObjectNode requestContent = objectMapper.createObjectNode();
			requestContent.put(CATALOGUE_CONTEXT, ContextUtility.getCurrentContext());
			requestContent.put(ENTITY_TYPE, EntityContext.PRODUCT.toString());
			requestContent.put(ENTITY_NAME, name);
			requestContent.put(CATALOGUE_PLAIN_URL, true);
			
			String url = httpCall.call("", HTTPMETHOD.POST, objectMapper.writeValueAsString(requestContent),
					MediaType.APPLICATION_JSON);
			
			return url;
		} catch(Exception e) {
			throw new WebApplicationException(e);
		}
	}
	
}