package org.gcube.gcat.rest;

import javax.ws.rs.GET;
import javax.ws.rs.InternalServerErrorException;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.xml.ws.WebServiceException;

import org.gcube.com.fasterxml.jackson.databind.JsonNode;
import org.gcube.com.fasterxml.jackson.databind.ObjectMapper;
import org.gcube.com.fasterxml.jackson.databind.node.ObjectNode;
import org.gcube.gcat.api.GCatConstants;
import org.gcube.gcat.persistence.ckan.CKANLicense;

import com.webcohesion.enunciate.metadata.rs.ResourceGroup;
import com.webcohesion.enunciate.metadata.rs.ResourceLabel;

/**
 * A collection to interact with licenses that are available in the catalogue.
 * A license is associated with items to define the legal right
 * to use such an item.
 * 
 * @author Luca Frosini (ISTI - CNR)
 */
@Path(License.LICENSES)
@ResourceGroup("Item Related APIs")
@ResourceLabel("License APIs")
public class License extends REST<CKANLicense> implements org.gcube.gcat.api.interfaces.License {
	
	public License() {
		super(LICENSES, null, CKANLicense.class);
	}
	
	/**
	 * @return the json array containing the licenses available in the catalogue
	 * 
	 * @pathExample /licenses
	 * @responseExample application/json classpath:/api-docs-examples/license/list-license-response.json
	 */
	@GET
	@Produces(MediaType.APPLICATION_JSON)
	public String list() throws WebServiceException {
		return super.list(-1, -1);
	}
	
	/**
	 * @return the json array containing the licenses available in the catalogue
	 * 
	 * @pathExample /licenses
	 * @responseExample application/json classpath:/api-docs-examples/license/list-license-response.json
	 */
	@GET
	@Produces(GCatConstants.APPLICATION_JSON_API)
	public String listAsJsonAPI() throws WebServiceException {
		String ret = super.list(-1, -1);
		ObjectMapper objectMapper = new ObjectMapper();
		ObjectNode objectNode = objectMapper.createObjectNode();
		try {
			JsonNode licenses = objectMapper.readTree(ret);
			objectNode.set(GCatConstants.JSON_API_DATA_FIELD_NAME, licenses);
			ret = objectMapper.writeValueAsString(objectNode);
		}catch (Exception e) {
			throw new InternalServerErrorException(e);
		}
		return ret;
	}
	
}