/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdc.be.servlets;


import java.util.Collections;
import java.util.Set;
import javax.inject.Inject;
import javax.inject.Singleton;
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 org.apache.commons.collections.MapUtils;
import org.openecomp.sdc.be.components.impl.ComponentInstanceBusinessLogic;
import org.openecomp.sdc.be.components.impl.ResourceImportManager;
import org.openecomp.sdc.be.components.impl.ServiceBusinessLogic;
import org.openecomp.sdc.be.config.BeEcompErrorManager;
import org.openecomp.sdc.be.dao.api.ActionStatus;
import org.openecomp.sdc.be.datatypes.elements.ForwardingPathDataDefinition;
import org.openecomp.sdc.be.datatypes.enums.ComponentFieldsEnum;
import org.openecomp.sdc.be.datatypes.enums.ComponentTypeEnum;
import org.openecomp.sdc.be.impl.ComponentsUtils;
import org.openecomp.sdc.be.impl.ServletUtils;
import org.openecomp.sdc.be.model.Service;
import org.openecomp.sdc.be.model.User;
import org.openecomp.sdc.be.resources.data.auditing.AuditingActionEnum;
import org.openecomp.sdc.be.ui.model.UiComponentDataTransfer;
import org.openecomp.sdc.be.ui.model.UiServiceDataTransfer;
import org.openecomp.sdc.be.user.UserBusinessLogic;
import org.openecomp.sdc.common.api.Constants;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.openecomp.sdc.exception.ResponseFormat;
import com.google.common.collect.Sets;
import com.jcabi.aspects.Loggable;
import fj.data.Either;
import io.swagger.v3.oas.annotations.OpenAPIDefinition;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.info.Info;
import io.swagger.v3.oas.annotations.media.ArraySchema;
import io.swagger.v3.oas.annotations.media.Content;
import io.swagger.v3.oas.annotations.media.Schema;
import io.swagger.v3.oas.annotations.responses.ApiResponse;
import io.swagger.v3.oas.annotations.responses.ApiResponses;
@Loggable(prepend = true, value = Loggable.DEBUG, trim = false)
@Path("/v1/catalog/services/{serviceId}/paths")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
@OpenAPIDefinition(info = @Info(title = "Service Forwarding Path", description = "Service Forwarding Path Servlet"))
@Singleton
public class ServiceForwardingPathServlet extends AbstractValidationsServlet {

    private static final Logger log = Logger.getLogger(ServiceForwardingPathServlet.class);
    private final ServiceBusinessLogic serviceBusinessLogic;

    @Inject
    public ServiceForwardingPathServlet(UserBusinessLogic userBusinessLogic,
        ComponentInstanceBusinessLogic componentInstanceBL,
        ComponentsUtils componentsUtils, ServletUtils servletUtils,
        ResourceImportManager resourceImportManager,
        ServiceBusinessLogic serviceBusinessLogic) {
        super(userBusinessLogic, componentInstanceBL, componentsUtils, servletUtils, resourceImportManager);
        this.serviceBusinessLogic = serviceBusinessLogic;
    }

    @POST
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    @Path("/")
    @Operation(description = "Create Forwarding Path", method = "POST", summary = "Create Forwarding Path",responses = @ApiResponse(
            content = @Content(array = @ArraySchema(schema = @Schema(implementation = Service.class)))))
    @ApiResponses(value =
            {@ApiResponse(responseCode = "201", description = "Create Forwarding Path"),
                    @ApiResponse(responseCode = "403", description = "Restricted operation"),
                    @ApiResponse(responseCode = "400", description = "Invalid content / Missing content"),
                    @ApiResponse(responseCode = "409", description = "Forwarding Path already exist")})
    public Response createForwardingPath(
            @Parameter(description = "Forwarding Path to create", required = true) String data,
            @Parameter(description = "Service Id") @PathParam("serviceId") String serviceId,
            @Context final HttpServletRequest request,
            @HeaderParam(value = Constants.USER_ID_HEADER) String userId) {
        return createOrUpdate(data, serviceId, request, userId, false);
    }



    @PUT
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    @Path("/")
    @Operation(description = "Update Forwarding Path", method = "PUT", summary = "Update Forwarding Path",responses = @ApiResponse(
            content = @Content(array = @ArraySchema(schema = @Schema(implementation = Service.class)))))
    @ApiResponses(value =
            {@ApiResponse(responseCode = "201", description = "Update Forwarding Path"),
                    @ApiResponse(responseCode = "403", description = "Restricted operation"),
                    @ApiResponse(responseCode = "400", description = "Invalid content / Missing content"),
                    @ApiResponse(responseCode = "409", description = "Forwarding Path already exist")})
    public Response updateForwardingPath(
            @Parameter(description = "Update Path to create", required = true) String data,
            @Parameter(description = "Service Id") @PathParam("serviceId") String serviceId,
            @Context final HttpServletRequest request,
            @HeaderParam(value = Constants.USER_ID_HEADER) String userId) {
        return createOrUpdate(data, serviceId, request, userId, true);
    }

    private Response createOrUpdate( String data, String serviceId, HttpServletRequest request, String userId, boolean isUpdate) {
        String url = request.getMethod() + " " + request.getRequestURI();
        log.debug("Start handle request of {}", url);

        User modifier = new User();
        modifier.setUserId(userId);
        log.debug("modifier id is {}", userId);

        Response response;

        try {
            String serviceIdLower = serviceId.toLowerCase();

            Either<Service, ResponseFormat> convertResponse = parseToService(data, modifier);
            if (convertResponse.isRight()) {
                log.debug("failed to parse service");
                response = buildErrorResponse(convertResponse.right().value());
                return response;
            }
            Service updatedService = convertResponse.left().value();
            Either<Service, ResponseFormat> actionResponse ;
            if (isUpdate) {
                actionResponse = serviceBusinessLogic.updateForwardingPath(serviceIdLower, updatedService, modifier, true);
            } else {
                actionResponse = serviceBusinessLogic.createForwardingPath(serviceIdLower, updatedService, modifier, true);
            }

            if (actionResponse.isRight()) {
                log.debug("failed to update or create paths");
                response = buildErrorResponse(actionResponse.right().value());
                return response;
            }

            Service service = actionResponse.left().value();
            Object result = RepresentationUtils.toRepresentation(service);
            return buildOkResponse(getComponentsUtils().getResponseFormat(ActionStatus.OK), result);

        } catch (Exception e) {
            BeEcompErrorManager.getInstance().logBeRestApiGeneralError("Forward Path Creation or update");
            log.debug("create or update forwarding path with an error", e);
            response = buildErrorResponse(getComponentsUtils().getResponseFormat(ActionStatus.GENERAL_ERROR));
            return response;

        }
    }

    @GET
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    @Path("/{forwardingPathId}")
    @Operation(description = "Get Forwarding Path", method = "GET", summary = "GET Forwarding Path",responses = @ApiResponse(
            content = @Content(array = @ArraySchema(schema = @Schema(implementation = ForwardingPathDataDefinition.class)))))
    @ApiResponses(value =
            {@ApiResponse(responseCode = "201", description = "Get Forwarding Path"),
                    @ApiResponse(responseCode = "403", description = "Restricted operation"),
                    @ApiResponse(responseCode = "400", description = "Invalid content / Missing content"),
                    @ApiResponse(responseCode = "409", description = "Forwarding Path already exist")})
    public Response getForwardingPath(
            @Parameter(description = "Forwarding Path to create", required = true) String datax,
            @Parameter(description = "Service Id") @PathParam("serviceId") String serviceId,
            @Parameter(description = "Forwarding Path Id") @PathParam("forwardingPathId") String forwardingPathId,
            @Context final HttpServletRequest request,
            @HeaderParam(value = Constants.USER_ID_HEADER) String userId) {
        String url = request.getMethod() + " " + request.getRequestURI();
        log.debug("Start handle request of {}", url);

        User modifier = new User();
        modifier.setUserId(userId);
        log.debug("modifier id is {}", userId);


        try {
            Either<UiComponentDataTransfer, ResponseFormat> serviceResponse = serviceBusinessLogic.getComponentDataFilteredByParams(serviceId, modifier, Collections.singletonList(ComponentFieldsEnum.FORWARDING_PATHS.getValue()));
            if (serviceResponse.isRight()) {
                return buildErrorResponse(serviceResponse.right().value());
            }

            UiServiceDataTransfer uiServiceDataTransfer = (UiServiceDataTransfer) serviceResponse.left().value();

            ForwardingPathDataDefinition forwardingPathDataDefinition = new ForwardingPathDataDefinition();
            if (!MapUtils.isEmpty(uiServiceDataTransfer.getForwardingPaths())) {
                forwardingPathDataDefinition = uiServiceDataTransfer.getForwardingPaths().get(forwardingPathId);
            }
            return buildOkResponse(getComponentsUtils().getResponseFormat(ActionStatus.OK), RepresentationUtils.toRepresentation(forwardingPathDataDefinition));


        } catch (Exception e) {
            BeEcompErrorManager.getInstance().logBeRestApiGeneralError("Update Service Metadata");
            log.debug("update service metadata failed with exception", e);
            return buildErrorResponse(getComponentsUtils().getResponseFormat(ActionStatus.GENERAL_ERROR));
        }
    }

    @DELETE
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    @Path("/{forwardingPathId}")
    @Operation(description = "Delete Forwarding Path", method = "DELETE", summary = "Delete Forwarding Path",responses = @ApiResponse(
            content = @Content(array = @ArraySchema(schema = @Schema(implementation = Service.class)))))
    @ApiResponses(value =
            {@ApiResponse(responseCode = "201", description = "Delete Forwarding Path"),
                    @ApiResponse(responseCode = "403", description = "Restricted operation"),
                    @ApiResponse(responseCode = "400", description = "Invalid content / Missing content"),
                    @ApiResponse(responseCode = "409", description = "Forwarding Path already exist")})
    public Response deleteForwardingPath(
            @Parameter(description = "Forwarding Path Id") @PathParam("forwardingPathId") String forwardingPathId,
            @Parameter(description = "Service Id") @PathParam("serviceId") String serviceId,
            @Context final HttpServletRequest request,
            @HeaderParam(value = Constants.USER_ID_HEADER) String userId) {
        String url = request.getMethod() + " " + request.getRequestURI();
        log.debug("Start handle request of {}", url);

        User modifier = new User();
        modifier.setUserId(userId);
        log.debug("modifier id is {}", userId);

        Response response;

        try {
            String serviceIdLower = serviceId.toLowerCase();

            Either<Set<String>, ResponseFormat> actionResponse = serviceBusinessLogic.deleteForwardingPaths(serviceIdLower, Sets.newHashSet(forwardingPathId), modifier, true);

            if (actionResponse.isRight()) {
                log.debug("failed to delete paths");
                response = buildErrorResponse(actionResponse.right().value());
                return response;
            }

            Set<String> deletedPaths = actionResponse.left().value();
            Object result = RepresentationUtils.toRepresentation(deletedPaths);
            return buildOkResponse(getComponentsUtils().getResponseFormat(ActionStatus.OK), result);

        } catch (Exception e) {
            BeEcompErrorManager.getInstance().logBeRestApiGeneralError("Delete forward paths");
            log.debug("Delete service paths with an error", e);
            response = buildErrorResponse(getComponentsUtils().getResponseFormat(ActionStatus.GENERAL_ERROR));
            return response;

        }
    }


    private Either<Service, ResponseFormat> parseToService(String serviceJson, User user) {
        return getComponentsUtils().convertJsonToObjectUsingObjectMapper(serviceJson, user, Service.class, AuditingActionEnum.CREATE_RESOURCE, ComponentTypeEnum.SERVICE);//TODO: change sSERVICE constant
    }
}