/*
 * Copyright 2012-2017 Red Hat, Inc.
 *
 * This file is part of Thermostat.
 *
 * Thermostat is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * Thermostat is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Thermostat; see the file COPYING.  If not see
 * <http://www.gnu.org/licenses/>.
 *
 * Linking this code with other modules is making a combined work
 * based on this code.  Thus, the terms and conditions of the GNU
 * General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this code give
 * you permission to link this code with independent modules to
 * produce an executable, regardless of the license terms of these
 * independent modules, and to copy and distribute the resulting
 * executable under terms of your choice, provided that you also
 * meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module
 * which is not derived from or based on this code.  If you modify
 * this code, you may extend this exception to your version of the
 * library, but you are not obligated to do so.  If you do not wish
 * to do so, delete this exception statement from your version.
 */

package com.redhat.thermostat.gateway.service.jvm.gc.http;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.DefaultValue;
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.Response;

import com.redhat.thermostat.gateway.common.core.auth.RealmAuthorizer;
import com.redhat.thermostat.gateway.common.core.model.LimitParameter;
import com.redhat.thermostat.gateway.common.core.model.OffsetParameter;
import com.redhat.thermostat.gateway.common.core.servlet.CommonQueryParams;
import com.redhat.thermostat.gateway.common.mongodb.ThermostatMongoStorage;
import com.redhat.thermostat.gateway.common.core.servlet.RequestParameters;
import com.redhat.thermostat.gateway.common.db.servlet.HttpHandlerHelper;
import com.redhat.thermostat.gateway.common.mongodb.servlet.MongoHttpHandlerHelper;
import com.redhat.thermostat.gateway.common.mongodb.servlet.ServletContextConstants;
import com.redhat.thermostat.gateway.service.jvm.gc.mongo.JvmGcMongoStorageHandler;

@Path("/")
public class JvmGcHttpHandler {


    private static final String collectionName = "jvm-gc";
    private final JvmGcMongoStorageHandler mongoStorageHandler = new JvmGcMongoStorageHandler();
    private final HttpHandlerHelper serviceHelper = new MongoHttpHandlerHelper( collectionName );

    @GET
    @Path("/jvms/{" + RequestParameters.JVM_ID +"}")
    @Consumes({ "application/json" })
    @Produces({ "application/json", "text/html; charset=utf-8" })
    public Response getJvmGc(@PathParam(RequestParameters.JVM_ID) String jvmId,
                             @QueryParam(RequestParameters.LIMIT) @DefaultValue("1") LimitParameter limit,
                             @QueryParam(RequestParameters.OFFSET) @DefaultValue("0") OffsetParameter offset,
                             @QueryParam(RequestParameters.SORT) String sort,
                             @QueryParam(RequestParameters.QUERY) String queries,
                             @QueryParam(RequestParameters.INCLUDE) String includes,
                             @QueryParam(RequestParameters.EXCLUDE) String excludes,
                             @QueryParam(RequestParameters.METADATA) @DefaultValue("false") Boolean metadata,
                             @Context HttpServletRequest httpServletRequest,
                             @Context ServletContext context) {
        return serviceHelper.handleGetWithJvmID(httpServletRequest, context, null, jvmId, new CommonQueryParams(limit, offset, sort, queries, includes, excludes, metadata));
    }


    @GET
    @Path("/systems/{" + RequestParameters.SYSTEM_ID +"}/jvms/{" + RequestParameters.JVM_ID +"}")
    @Consumes({ "application/json" })
    @Produces({ "application/json", "text/html; charset=utf-8" })
    public Response getJvmGc(@PathParam(RequestParameters.SYSTEM_ID) String systemId,
                             @PathParam(RequestParameters.JVM_ID) String jvmId,
                             @QueryParam(RequestParameters.LIMIT) @DefaultValue("1") LimitParameter limit,
                             @QueryParam(RequestParameters.OFFSET) @DefaultValue("0") OffsetParameter offset,
                             @QueryParam(RequestParameters.SORT) String sort,
                             @QueryParam(RequestParameters.QUERY) String queries,
                             @QueryParam(RequestParameters.INCLUDE) String includes,
                             @QueryParam(RequestParameters.EXCLUDE) String excludes,
                             @QueryParam(RequestParameters.METADATA) @DefaultValue("false") Boolean metadata,
                             @Context HttpServletRequest httpServletRequest,
                             @Context ServletContext context) {
        return serviceHelper.handleGetWithJvmID(httpServletRequest, context, systemId, jvmId, new CommonQueryParams(limit, offset, sort, queries, includes, excludes, metadata));
    }

    @PUT
    @Path("/systems/{" + RequestParameters.SYSTEM_ID +"}/jvms/{" + RequestParameters.JVM_ID +"}")
    @Consumes({ "application/json" })
    @Produces({ "application/json", "text/html; charset=utf-8" })
    public Response putJvmGc(String body,
                             @PathParam(RequestParameters.SYSTEM_ID) String systemId,
                             @PathParam(RequestParameters.JVM_ID) String jvmId,
                             @QueryParam(RequestParameters.QUERY) String queries,
                             @QueryParam(RequestParameters.METADATA) @DefaultValue("false") Boolean metadata,
                             @Context ServletContext context,
                             @Context HttpServletRequest httpServletRequest) {
        return serviceHelper.handlePutWithJvmId(httpServletRequest, context, systemId, jvmId, queries, metadata, body);
    }

    @POST
    @Path("/systems/{" + RequestParameters.SYSTEM_ID +"}/jvms/{" + RequestParameters.JVM_ID +"}")
    @Consumes({ "application/json" })
    @Produces({ "application/json", "text/html; charset=utf-8" })
    public Response postJvmGc(String body,
                              @PathParam(RequestParameters.SYSTEM_ID) String systemId,
                              @PathParam(RequestParameters.JVM_ID) String jvmId,
                              @QueryParam(RequestParameters.METADATA) @DefaultValue("false") Boolean metadata,
                              @Context ServletContext context,
                              @Context HttpServletRequest httpServletRequest) {
        return serviceHelper.handlePostWithJvmID(httpServletRequest, context, systemId, jvmId, metadata, body);
    }

    @DELETE
    @Path("/systems/{" + RequestParameters.SYSTEM_ID +"}/jvms/{" + RequestParameters.JVM_ID +"}")
    @Consumes({ "application/json" })
    @Produces({ "application/json", "text/html; charset=utf-8" })
    public Response deleteJvmGc(@PathParam(RequestParameters.SYSTEM_ID) String systemId,
                                @PathParam(RequestParameters.JVM_ID) String jvmId,
                                @QueryParam(RequestParameters.QUERY) String queries,
                                @QueryParam(RequestParameters.METADATA) @DefaultValue("false") Boolean metadata,
                                @Context ServletContext context,
                                @Context HttpServletRequest httpServletRequest) {
        return serviceHelper.handleDeleteWithJvmID(httpServletRequest, context, systemId, jvmId, queries, metadata);
    }

    @GET
    @Path("/delta/{jvmId}")
    @Consumes({ "application/json" })
    @Produces({ "application/json", "text/html; charset=utf-8" })
    public Response getJvmGcDelta(@PathParam("jvmId") String jvmId,
                                  @QueryParam(RequestParameters.LIMIT) @DefaultValue("1") Integer limit,
                                  @QueryParam(RequestParameters.OFFSET) @DefaultValue("0") Integer offset,
                                  @QueryParam("after") Long afterTimeStamp,
                                  @QueryParam("before") Long beforeTimeStamp,
                                  @QueryParam(RequestParameters.METADATA) @DefaultValue("false") Boolean metadata,
                                  @Context HttpServletRequest httpServletRequest,
                                  @Context ServletContext context) {
        try {
            RealmAuthorizer realmAuthorizer = (RealmAuthorizer) httpServletRequest.getAttribute(RealmAuthorizer.class.getName());

            if (realmAuthorizer.readable()) {
                ThermostatMongoStorage storage = (ThermostatMongoStorage) context.getAttribute(ServletContextConstants.MONGODB_CLIENT_ATTRIBUTE);

                String response = mongoStorageHandler.getJvmGcDelta(storage.getDatabase().getCollection(collectionName),
                        jvmId, limit, offset, afterTimeStamp, beforeTimeStamp, metadata, httpServletRequest,
                        realmAuthorizer.getReadableRealms());
                return Response.status(Response.Status.OK).entity(response).build();
            } else {
                return Response.status(Response.Status.FORBIDDEN).build();
            }
        } catch (Exception e) {
            return Response.status(Response.Status.BAD_REQUEST).build();
        }
    }
}