/*
 * Copyright (c) 2014, 2015 Red Hat, Inc. 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.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.MediaType;
import javax.ws.rs.core.Response;

import org.codehaus.enunciate.jaxrs.ResponseCode;
import org.codehaus.enunciate.jaxrs.StatusCodes;
import org.opendaylight.neutron.spi.INeutronLoadBalancerHealthMonitorAware;
import org.opendaylight.neutron.spi.INeutronLoadBalancerHealthMonitorCRUD;
import org.opendaylight.neutron.spi.NeutronCRUDInterfaces;
import org.opendaylight.neutron.spi.NeutronLoadBalancerHealthMonitor;

/**
 * Neutron Northbound REST APIs for Load Balancer HealthMonitor.<br>
 * This class provides REST APIs for managing neutron LoadBalancerHealthMonitor
 *
 * <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("/lbaas/healthmonitors")
public class NeutronLoadBalancerHealthMonitorNorthbound
    extends AbstractNeutronNorthbound<NeutronLoadBalancerHealthMonitor, NeutronLoadBalancerHealthMonitorRequest, INeutronLoadBalancerHealthMonitorCRUD, INeutronLoadBalancerHealthMonitorAware> {

    private static final String RESOURCE_NAME = "LoadBalancerHealthMonitor";

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

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

    @Override
    protected NeutronLoadBalancerHealthMonitorRequest newNeutronRequest(NeutronLoadBalancerHealthMonitor o) {
        return new NeutronLoadBalancerHealthMonitorRequest(o);
    }

    @Override
    protected INeutronLoadBalancerHealthMonitorCRUD getNeutronCRUD() {
        NeutronCRUDInterfaces answer = new NeutronCRUDInterfaces().fetchINeutronLoadBalancerHealthMonitorCRUD(this);
        if (answer.getLoadBalancerHealthMonitorInterface() == null) {
            throw new ServiceUnavailableException(serviceUnavailable());
        }
        return answer.getLoadBalancerHealthMonitorInterface();
    }

    @Override
    protected Object[] getInstances() {
        return NeutronUtil.getInstances(INeutronLoadBalancerHealthMonitorAware.class, this);
    }

    @Override
    protected int canCreate(Object instance, NeutronLoadBalancerHealthMonitor singleton) {
        INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
        return service.canCreateNeutronLoadBalancerHealthMonitor(singleton);
    }

    @Override
    protected void created(Object instance, NeutronLoadBalancerHealthMonitor singleton) {
        INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
        service.neutronLoadBalancerHealthMonitorCreated(singleton);
    }

    @Override
    protected int canUpdate(Object instance, NeutronLoadBalancerHealthMonitor delta, NeutronLoadBalancerHealthMonitor original) {
        INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
        return service.canUpdateNeutronLoadBalancerHealthMonitor(delta, original);
    }

    @Override
    protected void updated(Object instance, NeutronLoadBalancerHealthMonitor updated) {
        INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
        service.neutronLoadBalancerHealthMonitorUpdated(updated);
    }

    @Override
    protected int canDelete(Object instance, NeutronLoadBalancerHealthMonitor singleton) {
        INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
        return service.canDeleteNeutronLoadBalancerHealthMonitor(singleton);
    }

    @Override
    protected void deleted(Object instance, NeutronLoadBalancerHealthMonitor singleton) {
        INeutronLoadBalancerHealthMonitorAware service = (INeutronLoadBalancerHealthMonitorAware) instance;
        service.neutronLoadBalancerHealthMonitorDeleted(singleton);
    }

    /**
     * Returns a list of all LoadBalancerHealthMonitor */
    @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 listGroups(
            // return fields
            @QueryParam("fields") List<String> fields,
            // OpenStack LoadBalancerHealthMonitor attributes
            @QueryParam("id") String queryLoadBalancerHealthMonitorID,
            @QueryParam("tenant_id") String queryLoadBalancerHealthMonitorTenantID,
            // TODO "type" is being a property by the JSON parser.
            @QueryParam("type") String queryLoadBalancerHealthMonitorType,
            @QueryParam("delay") Integer queryLoadBalancerHealthMonitorDelay,
            @QueryParam("timeout") Integer queryLoadBalancerHealthMonitorTimeout,
            @QueryParam("max_retries") Integer queryLoadBalancerHealthMonitorMaxRetries,
            @QueryParam("http_method") String queryLoadBalancerHealthMonitorHttpMethod,
            @QueryParam("url_path") String queryLoadBalancerHealthMonitorUrlPath,
            @QueryParam("expected_codes") String queryLoadBalancerHealthMonitorExpectedCodes,
            @QueryParam("admin_state_up") Boolean queryLoadBalancerHealthMonitorIsAdminStateUp,
            // pagination
            @QueryParam("limit") String limit,
            @QueryParam("marker") String marker,
            @QueryParam("page_reverse") String pageReverse
            // sorting not supported
    ) {
        INeutronLoadBalancerHealthMonitorCRUD loadBalancerHealthMonitorInterface = getNeutronCRUD();
        List<NeutronLoadBalancerHealthMonitor> allLoadBalancerHealthMonitors = loadBalancerHealthMonitorInterface.getAllNeutronLoadBalancerHealthMonitors();
        List<NeutronLoadBalancerHealthMonitor> ans = new ArrayList<NeutronLoadBalancerHealthMonitor>();
        Iterator<NeutronLoadBalancerHealthMonitor> i = allLoadBalancerHealthMonitors.iterator();
        while (i.hasNext()) {
            NeutronLoadBalancerHealthMonitor nsg = i.next();
            if ((queryLoadBalancerHealthMonitorID == null ||
                    queryLoadBalancerHealthMonitorID.equals(nsg.getID())) &&
                    (queryLoadBalancerHealthMonitorTenantID == null ||
                            queryLoadBalancerHealthMonitorTenantID.equals
                                    (nsg.getTenantID())) &&
                    (queryLoadBalancerHealthMonitorType == null ||
                            queryLoadBalancerHealthMonitorType.equals
                                    (nsg.getLoadBalancerHealthMonitorType())) &&
                    (queryLoadBalancerHealthMonitorDelay == null ||
                            queryLoadBalancerHealthMonitorDelay.equals
                                    (nsg.getLoadBalancerHealthMonitorDelay())) &&
                    (queryLoadBalancerHealthMonitorTimeout == null ||
                            queryLoadBalancerHealthMonitorTimeout.equals
                                    (nsg.getLoadBalancerHealthMonitorTimeout())) &&
                    (queryLoadBalancerHealthMonitorMaxRetries == null ||
                            queryLoadBalancerHealthMonitorMaxRetries.equals
                                    (nsg.getLoadBalancerHealthMonitorMaxRetries())) &&
                    (queryLoadBalancerHealthMonitorHttpMethod == null ||
                            queryLoadBalancerHealthMonitorHttpMethod.equals
                                    (nsg.getLoadBalancerHealthMonitorHttpMethod())) &&
                    (queryLoadBalancerHealthMonitorUrlPath == null ||
                            queryLoadBalancerHealthMonitorUrlPath.equals
                                    (nsg.getLoadBalancerHealthMonitorUrlPath())) &&
                    (queryLoadBalancerHealthMonitorExpectedCodes == null ||
                            queryLoadBalancerHealthMonitorExpectedCodes.equals
                                    (nsg.getLoadBalancerHealthMonitorExpectedCodes())) &&
                    (queryLoadBalancerHealthMonitorIsAdminStateUp == null ||
                            queryLoadBalancerHealthMonitorIsAdminStateUp.equals
                                    (nsg.getLoadBalancerHealthMonitorAdminStateIsUp()))) {
                if (fields.size() > 0) {
                    ans.add(extractFields(nsg,fields));
                } else {
                    ans.add(nsg);
                }
            }
        }
        return Response.status(HttpURLConnection.HTTP_OK).entity(
                new NeutronLoadBalancerHealthMonitorRequest(ans)).build();
    }

    /**
     * Returns a specific LoadBalancerHealthMonitor */

    @Path("{loadBalancerHealthMonitorID}")
    @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 showLoadBalancerHealthMonitor(@PathParam("loadBalancerHealthMonitorID") String loadBalancerHealthMonitorID,
            // return fields
            @QueryParam("fields") List<String> fields) {
        return show(loadBalancerHealthMonitorID, fields);
    }

    /**
     * Creates new LoadBalancerHealthMonitor */

    @POST
    @Produces({ MediaType.APPLICATION_JSON })
    @Consumes({ MediaType.APPLICATION_JSON })
    @StatusCodes({
            @ResponseCode(code = HttpURLConnection.HTTP_CREATED, condition = "Created"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
    public Response createLoadBalancerHealthMonitors(final NeutronLoadBalancerHealthMonitorRequest input) {
        return create(input);
    }

    /**
     * Updates a LoadBalancerHealthMonitor Policy
     */
    @Path("{loadBalancerHealthMonitorID}")
    @PUT
    @Produces({ MediaType.APPLICATION_JSON })
    @Consumes({ MediaType.APPLICATION_JSON })
    @StatusCodes({
            @ResponseCode(code = HttpURLConnection.HTTP_OK, condition = "Operation successful"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
    public Response updateLoadBalancerHealthMonitor(
            @PathParam("loadBalancerHealthMonitorID") String loadBalancerHealthMonitorID,
            final NeutronLoadBalancerHealthMonitorRequest input) {
        return update(loadBalancerHealthMonitorID, input);
    }


    /**
     * Deletes a LoadBalancerHealthMonitor
     * */
    @Path("{loadBalancerHealthMonitorID}")
    @DELETE
    @StatusCodes({
            @ResponseCode(code = HttpURLConnection.HTTP_NO_CONTENT, condition = "No Content"),
            @ResponseCode(code = HttpURLConnection.HTTP_UNAVAILABLE, condition = "No providers available") })
    public Response deleteLoadBalancerHealthMonitor(
            @PathParam("loadBalancerHealthMonitorID") String loadBalancerHealthMonitorID) {
        return delete(loadBalancerHealthMonitorID);
    }
}