/*
 * Copyright (c) 2015 Hewlett-Packard Development Company, L.P. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */

package org.opendaylight.neutron.northbound.api;

import java.net.HttpURLConnection;
import java.util.ArrayList;
import java.util.Iterator;
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.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 javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import org.codehaus.enunciate.jaxrs.ResponseCode;
import org.codehaus.enunciate.jaxrs.StatusCodes;
import org.opendaylight.neutron.spi.INeutronL2gatewayConnectionCRUD;
import org.opendaylight.neutron.spi.NeutronCRUDInterfaces;
import org.opendaylight.neutron.spi.NeutronL2gatewayConnection;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Neutron Northbound REST APIs for L2 gateway Connection.<br>
 * This class provides REST APIs for managing L2 gateway Connection
 * * *
 * <br>
 * <br>
 * Authentication scheme : <b>HTTP Basic</b><br>
 * Authentication realm : <b>opendaylight</b><br>
 * Transport : <b>HTTP and HTTPS</b><br>
 * <br>
 * HTTPS Authentication is disabled by default. Administrator can enable it in
 * tomcat-server.xml after adding a proper keystore / SSL certificate from a
 * trusted authority.<br>
 * More info :
 * http://tomcat.apache.org/tomcat-7.0-doc/ssl-howto.html#Configuration
 */

@Path("/l2gateway-connections")
public class NeutronL2gatewayConnectionNorthbound extends AbstractNeutronNorthbound<NeutronL2gatewayConnection,
        NeutronL2gatewayConnectionRequest, INeutronL2gatewayConnectionCRUD> {

    static final Logger logger = LoggerFactory.getLogger(NeutronL2gatewayConnectionNorthbound.class);

    @Context
    UriInfo uriInfo;

    private static final String RESOURCE_NAME = "L2gatewayConnection";
    private static final String INTERFACE_NAME = "L2gatewayConnection CRUD Interface";

    @Override
    protected String getResourceName() {
        return RESOURCE_NAME;
    }

    @Override
    protected NeutronL2gatewayConnection extractFields(NeutronL2gatewayConnection o, List<String> fields) {
        return o.extractFields(fields);
    }

    @Override
    protected NeutronL2gatewayConnectionRequest newNeutronRequest(NeutronL2gatewayConnection o) {
        return new NeutronL2gatewayConnectionRequest(o);
    }

    @Override
    protected INeutronL2gatewayConnectionCRUD getNeutronCRUD() {
        NeutronCRUDInterfaces answer = new NeutronCRUDInterfaces().fetchINeutronL2gatewayConnectionCRUD(this);
        if (answer.getL2gatewayConnectionInterface() == null) {
            throw new ServiceUnavailableException(serviceUnavailable());
        }
        return answer.getL2gatewayConnectionInterface();
    }

    /**
     * Creates L2gateway Connection
     * @param  input contains connection details
     * @return status
     */
    @POST
    @Produces({ MediaType.APPLICATION_JSON })
    @Consumes({ MediaType.APPLICATION_JSON })
    @StatusCodes({ @ResponseCode(code = HttpURLConnection.HTTP_CREATED, condition = "Created"),
            @ResponseCode(code = HttpURLConnection.HTTP_BAD_REQUEST, condition = "Bad Request"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAUTHORIZED, condition = "Unauthorized"),
            @ResponseCode(code = HttpURLConnection.HTTP_FORBIDDEN, condition = "Forbidden"),
            @ResponseCode(code = HttpURLConnection.HTTP_NOT_FOUND, condition = "Not Found"),
            @ResponseCode(code = HttpURLConnection.HTTP_CONFLICT, condition = "Conflict"),
            @ResponseCode(code = HttpURLConnection.HTTP_NOT_IMPLEMENTED, condition = "Not Implemented"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })

    public Response createL2gatewayConnection(final NeutronL2gatewayConnectionRequest input) {
        logger.debug("createL2GatewayConnection   NeutronL2GatewayConnectionRequest");
        return create(input);
    }

    /**
     * Returns a list of all L2gateway Connections.
     *
     */
    @GET
    @Produces({ MediaType.APPLICATION_JSON })
    @StatusCodes({ @ResponseCode(code = HttpURLConnection.HTTP_OK, condition = "Operation successful"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAUTHORIZED, condition = "Unauthorized"),
            @ResponseCode(code = HttpURLConnection.HTTP_NOT_IMPLEMENTED, condition = "Not Implemented"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
    public Response listL2gatewayConnections(
            // return fields
            @QueryParam("fields") List<String> fields,
            @QueryParam("tenant_id") String queryTenantID,
            @QueryParam("connection_id") String queryConnectionID,
            @QueryParam("l2gateway_id") String queryL2gatewayID,
            @QueryParam("network_id") String queryNetworkID,
            @QueryParam("segment_id") String querySegmentID,
            @QueryParam("port_id") String queryPortID,
            @QueryParam("limit") String limit,
            @QueryParam("marker") String marker,
            @QueryParam("page_reverse") String pageReverse
    // sorting not supported
    ) {
        INeutronL2gatewayConnectionCRUD l2gatewayConnectionInterface = getNeutronCRUD();
        List<NeutronL2gatewayConnection> allL2gatewayConnections = l2gatewayConnectionInterface.getAll();
        List<NeutronL2gatewayConnection> ans = new ArrayList<>();
        Iterator<NeutronL2gatewayConnection> i = allL2gatewayConnections.iterator();
        while (i.hasNext()) {
            NeutronL2gatewayConnection oSS = i.next();
            if ((queryTenantID == null || queryTenantID.equals(oSS.getTenantID()))
                    && (queryConnectionID == null || queryConnectionID.equals(oSS.getID()))
                    && (queryL2gatewayID == null || queryL2gatewayID.equals(oSS.getL2gatewayID()))
                    && (queryNetworkID == null || queryNetworkID.equals(oSS.getNetworkID()))
                    && (querySegmentID == null || querySegmentID.equals(oSS.getSegmentID()))
                    && (queryPortID == null || queryPortID.equals(oSS.getPortID()))) {
                if (fields.size() > 0) {
                    ans.add(extractFields(oSS, fields));
                } else {
                    ans.add(oSS);
                }
            }
        }
        // TODO: apply pagination to results
        return Response.status(HttpURLConnection.HTTP_OK).entity(new NeutronL2gatewayConnectionRequest(ans)).build();
    }

    /**
     * Returns a specific L2gateway Connection.
     * @param l2gatewayConnectionID gateway connectID to fetch
     * @param fields attributes used for querying
     * @return status
     */
    @Path("{l2gatewayConnectionID}")
    @GET
    @Produces({ MediaType.APPLICATION_JSON })
    @StatusCodes({ @ResponseCode(code = HttpURLConnection.HTTP_OK, condition = "Operation successful"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAUTHORIZED, condition = "Unauthorized"),
            @ResponseCode(code = HttpURLConnection.HTTP_NOT_FOUND, condition = "Not Found"),
            @ResponseCode(code = HttpURLConnection.HTTP_NOT_IMPLEMENTED, condition = "Not Implemented"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
    public Response showL2gatewayID(@PathParam("l2gatewayConnectionID") String l2gatewayConnectionID,
            // return fields
            @QueryParam("fields") List<String> fields) {
        return show(l2gatewayConnectionID, fields);
    }

    /**
     * Deletes a L2gateway Connection
     * @param  l2gatewayConnectionID  connection ID to delete
     * @return status
     */
    @Path("{l2gatewayConnectionID}")
    @DELETE
    @StatusCodes({ @ResponseCode(code = HttpURLConnection.HTTP_NO_CONTENT, condition = "No Content"),
            @ResponseCode(code = HttpURLConnection.HTTP_NOT_FOUND, condition = "Not Found"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
    public Response deleteL2gatewayConnection(@PathParam("l2gatewayConnectionID") String l2gatewayConnectionID) {
        return delete(l2gatewayConnectionID);
    }

    // l2gwconnection API doesn't have update method
}