package net.curisit.securis.services;

import java.util.Date;
import java.util.List;

import javax.inject.Inject;
import javax.inject.Provider;
import javax.persistence.EntityManager;
import javax.persistence.Query;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

import net.curisit.integrity.commons.Utils;
import net.curisit.securis.SecurisErrorHandler;
import net.curisit.securis.db.Application;
import net.curisit.securis.db.LicenseType;
import net.curisit.securis.utils.TokenHelper;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.inject.persist.Transactional;

/**
 * LicenseType resource, this service will provide methods to create, modify and delete license types
 * 
 * @author roberto <roberto.sanchez@curisit.net>
 */
@Path("/licensetype")
public class LicenseTypeResource {

	private static final Logger log = LoggerFactory.getLogger(LicenseTypeResource.class);

	@Inject
	TokenHelper tokenHelper;

	@Inject
	Provider<EntityManager> emProvider;

	public LicenseTypeResource() {
	}

	/**
	 * 
	 * @return the server version in format majorVersion.minorVersion
	 */
	@GET
	@Path("/")
	@Produces(
		{ MediaType.APPLICATION_JSON })
	public Response index() {
		log.info("Getting license types list ");

		EntityManager em = emProvider.get();
		Query q = em.createNamedQuery("list-license_types");
		@SuppressWarnings("unchecked")
		List<Object> list = q.getResultList();

		return Response.ok(list).build();
	}

	/**
	 * 
	 * @return the server version in format majorVersion.minorVersion
	 */
	@GET
	@Path("/{ltid}")
	@Produces(
		{ MediaType.APPLICATION_JSON })
	public Response get(@PathParam("ltid") String ltid, @HeaderParam(TokenHelper.TOKEN_HEADER_PÀRAM) String token) {
		log.info("Getting license type data for id: {}: ", ltid);
		if (ltid == null || ltid.equals("")) {
			log.error("LicenseType ID is mandatory");
			return Response.status(Status.NOT_FOUND).build();
		}

		EntityManager em = emProvider.get();
		LicenseType lt = em.find(LicenseType.class, Integer.parseInt(ltid));
		if (lt == null) {
			log.error("LicenseType with id {} not found in DB", ltid);
			return Response.status(Status.NOT_FOUND).build();
		}
		return Response.ok(lt).build();
	}

	@POST
	@Path("/")
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(
		{ MediaType.APPLICATION_JSON })
	@Transactional
	public Response create(LicenseType lt, @HeaderParam(TokenHelper.TOKEN_HEADER_PÀRAM) String token) {
		log.info("Creating new license type");
		EntityManager em = emProvider.get();
		Application app = null;
		if (lt.getApplicationId() != null) {
			app = em.find(Application.class, lt.getApplicationId());
			if (app == null) {
				log.error("LicenseType application with id {} not found in DB", lt.getApplicationId());
				return Response.status(Status.NOT_FOUND).header(SecurisErrorHandler.HEADER_ERROR_MESSAGE, "License type's app not found with ID: " + lt.getApplicationId()).build();
			}
		}

		lt.setApplication(app);
		lt.setCreationTimestamp(new Date());
		em.persist(lt);

		return Response.ok(lt).build();
	}

	@PUT
	@POST
	@Path("/{ltid}")
	@Transactional
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(
		{ MediaType.APPLICATION_JSON })
	public Response modify(LicenseType lt, @PathParam("ltid") String ltid, @HeaderParam(TokenHelper.TOKEN_HEADER_PÀRAM) String token) {
		log.info("Modifying license type with id: {}", ltid);
		EntityManager em = emProvider.get();
		LicenseType currentlt = em.find(LicenseType.class, Integer.parseInt(ltid));
		if (currentlt == null) {
			log.error("LicenseType with id {} not found in DB", ltid);
			return Response.status(Status.NOT_FOUND).header(SecurisErrorHandler.HEADER_ERROR_MESSAGE, "License type not found with ID: " + ltid).build();
		}
		Application app = null;
		if (lt.getApplicationId() != null) {
			app = em.find(Application.class, lt.getApplicationId());
			if (app == null) {
				log.error("LicenseType application with id {} not found in DB", lt.getApplicationId());
				return Response.status(Status.NOT_FOUND).header(SecurisErrorHandler.HEADER_ERROR_MESSAGE, "License type's app not found with ID: " + lt.getApplicationId()).build();
			}
		}
		currentlt.setCode(lt.getCode());
		currentlt.setName(lt.getName());
		currentlt.setDescription(lt.getDescription());
		currentlt.setApplication(app);
		em.persist(currentlt);

		return Response.ok(currentlt).build();
	}

	@DELETE
	@Path("/{ltid}")
	@Transactional
	@Produces(
		{ MediaType.APPLICATION_JSON })
	public Response delete(@PathParam("ltid") String ltid, @Context HttpServletRequest request) {
		log.info("Deleting app with id: {}", ltid);
		EntityManager em = emProvider.get();
		LicenseType app = em.find(LicenseType.class, Integer.parseInt(ltid));
		if (app == null) {
			log.error("LicenseType with id {} can not be deleted, It was not found in DB", ltid);
			return Response.status(Status.NOT_FOUND).build();
		}

		em.remove(app);
		return Response.ok(Utils.createMap("success", true, "id", ltid)).build();
	}

}