/**
 * Copyright (c) 2009 - 2012 Red Hat, Inc.
 *
 * This software is licensed to you under the GNU General Public License,
 * version 2 (GPLv2). There is NO WARRANTY for this software, express or
 * implied, including the implied warranties of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. You should have received a copy of GPLv2
 * along with this software; if not, see
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * Red Hat trademarks are not licensed under GPLv2. No permission is
 * granted to use or replicate Red Hat trademarks that are incorporated
 * in this software or its documentation.
 */
package org.candlepin.resource;

import org.candlepin.auth.Principal;
import org.candlepin.common.exceptions.BadRequestException;
import org.candlepin.common.exceptions.NotFoundException;
import org.candlepin.model.DistributorVersion;
import org.candlepin.model.DistributorVersionCurator;

import com.google.inject.Inject;

import org.apache.commons.lang.StringUtils;
import org.xnap.commons.i18n.I18n;

import java.util.List;

import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
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.QueryParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import io.swagger.annotations.ApiResponse;
import io.swagger.annotations.ApiResponses;
import io.swagger.annotations.Authorization;

/**
 * DistributorVersionResource
 */
@Path("/distributor_versions")
@Api(value = "distributor_versions", authorizations = { @Authorization("basic") })
public class DistributorVersionResource {

    private I18n i18n;
    private DistributorVersionCurator curator;

    @Inject
    public DistributorVersionResource(I18n i18n,
        DistributorVersionCurator curator) {
        this.i18n = i18n;
        this.curator = curator;
    }

    @ApiOperation(notes = "Retrieves list of Distributor Versions", value = "getVersions")
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public List<DistributorVersion> getVersions(
        @QueryParam("name_search") String nameSearch,
        @QueryParam("capability") String capability,
        @Context Principal principal) {

        if (!StringUtils.isBlank(nameSearch)) {
            return curator.findByNameSearch(nameSearch);
        }
        if (!StringUtils.isBlank(capability)) {
            return curator.findByCapability(capability);
        }
        return curator.findAll();
    }

    @ApiOperation(notes = "Deletes a Distributor Version", value = "delete")
    @ApiResponses({ @ApiResponse(code = 400, message = ""), @ApiResponse(code = 404, message = "") })
    @DELETE
    @Produces(MediaType.WILDCARD)
    @Path("/{id}")
    public void delete(@PathParam("id") String id,
        @Context Principal principal) {
        DistributorVersion dv = curator.findById(id);
        if (dv != null) {
            curator.delete(dv);
        }
    }

    @ApiOperation(notes = "Creates a Distributor Version", value = "create")
    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    public DistributorVersion create(
        @ApiParam(name = "distributorVersion", required = true) DistributorVersion dv,
        @Context Principal principal) {
        DistributorVersion existing = curator.findByName(dv.getName());
        if (existing != null) {
            throw new BadRequestException(
                i18n.tr("A distributor version with name {0} " +
                        "already exists", dv.getName()));
        }
        return curator.create(dv);
    }

    @ApiOperation(notes = "Updates a Distributor Version", value = "update")
    @PUT
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    @Path("/{id}")
    public DistributorVersion update(@PathParam("id") String id,
        @ApiParam(name = "distributorVersion", required = true) DistributorVersion dv,
        @Context Principal principal) {
        DistributorVersion existing = verifyAndLookupDistributorVersion(id);
        existing.setDisplayName(dv.getDisplayName());
        existing.setCapabilities(dv.getCapabilities());
        curator.merge(existing);
        return existing;
    }

    private DistributorVersion verifyAndLookupDistributorVersion(String id) {
        DistributorVersion dv = curator.findById(id);

        if (dv == null) {
            throw new NotFoundException(i18n.tr("No such distributor version: {0}",
                id));
        }
        return dv;
    }
}