/**
 * Copyright (c) 2018 Orange
 *
 * 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.
 */

package org.onap.nbi.apis.serviceorder;

import javax.annotation.PostConstruct;
import org.onap.nbi.OnapComponentsUrlPaths;
import org.onap.nbi.apis.serviceorder.model.consumer.CreateE2EServiceInstanceResponse;
import org.onap.nbi.apis.serviceorder.model.consumer.CreateMacroServiceInstanceResponse;
import org.onap.nbi.apis.serviceorder.model.consumer.CreateServiceInstanceResponse;
import org.onap.nbi.apis.serviceorder.model.consumer.DeleteE2EServiceInstanceResponse;
import org.onap.nbi.apis.serviceorder.model.consumer.GetE2ERequestStatusResponse;
import org.onap.nbi.apis.serviceorder.model.consumer.GetRequestStatusResponse;
import org.onap.nbi.apis.serviceorder.model.consumer.MSODeleteE2EPayload;
import org.onap.nbi.apis.serviceorder.model.consumer.MSOE2EPayload;
import org.onap.nbi.apis.serviceorder.model.consumer.MSOE2EServiceActivationPayload;
import org.onap.nbi.apis.serviceorder.model.consumer.MSOE2EServiceActivationReponse;
import org.onap.nbi.apis.serviceorder.model.consumer.MSOPayload;
import org.onap.nbi.apis.serviceorder.model.consumer.ServiceResponse;
import org.onap.nbi.exceptions.BackendFunctionalException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Service;
import org.springframework.web.client.ResourceAccessException;
import org.springframework.web.client.RestTemplate;

@Service
public class SoClient {

    public static final String RESPONSE_STATUS = "response status : ";
    public static final String RETURNS = " returns ";
    public static final String ERROR_ON_CALLING = "error on calling ";
    @Autowired
    private RestTemplate restTemplate;

    @Value("${so.host}")
    private String soHostname;

    @Value("${so.onap.partner.name}")
    private String soOnapPartnerName;

    @Value("${so.header.authorization}")
    private String soHeaderAuthorization;

    private static final String HEADER_AUTHORIZATION = "Authorization";
    private static final String X_ONAP_PARTNER_HEADER = "X-ONAP-PartnerName";

    private static final Logger LOGGER = LoggerFactory.getLogger(SoClient.class);

    private String createSoUrl;
    private String createE2ESoUrl;
    private String getSoStatus;
    private String getE2ESoStatus;
    private String deleteE2ESoUrl;
    private String activationE2ESoUrl;
    private String deleteSoUrl;
    private String SoHealthCheck;

    @PostConstruct
    private void setUpAndLogSOUrl() {
        createSoUrl = new StringBuilder().append(soHostname)
                .append(OnapComponentsUrlPaths.MSO_CREATE_SERVICE_INSTANCE_PATH).toString();
        createE2ESoUrl = new StringBuilder().append(soHostname)
                .append(OnapComponentsUrlPaths.MSO_CREATE_E2ESERVICE_INSTANCE_PATH).toString();
        deleteSoUrl = new StringBuilder().append(soHostname)
                .append(OnapComponentsUrlPaths.MSO_DELETE_REQUEST_STATUS_PATH).toString();
        deleteE2ESoUrl = new StringBuilder().append(soHostname)
                .append(OnapComponentsUrlPaths.MSO_DELETE_E2ESERVICE_INSTANCE_PATH).toString();
        activationE2ESoUrl = new StringBuilder().append(soHostname)	
                .append(OnapComponentsUrlPaths.MSO_ACTIVATION_E2ESERVICE_INSTANCE_PATH).toString();
	getSoStatus = new StringBuilder().append(soHostname).append(OnapComponentsUrlPaths.MSO_GET_REQUEST_STATUS_PATH)
                .toString();
        getE2ESoStatus = new StringBuilder().append(soHostname)
                .append(OnapComponentsUrlPaths.MSO_GET_E2EREQUEST_STATUS_PATH).toString();
        SoHealthCheck =
                new StringBuilder().append(soHostname).append(OnapComponentsUrlPaths.MSO_HEALTH_CHECK).toString();

        LOGGER.info("SO create service url :  " + createSoUrl);
        LOGGER.info("SO create e2e service url :  " + createE2ESoUrl);
        LOGGER.info("SO delete service url :  " + deleteSoUrl);
        LOGGER.info("SO delete e2e service url :  " + deleteE2ESoUrl);
        LOGGER.info("SO e2e service actiavtion url :  " + activationE2ESoUrl);
	LOGGER.info("SO get so status url :  " + getSoStatus);
        LOGGER.info("SO get e2e so status url :  " + getE2ESoStatus);
        LOGGER.info("SO healthCheck :  " + SoHealthCheck);

    }

    public ResponseEntity<CreateServiceInstanceResponse> callCreateServiceInstance(MSOPayload msoPayload) {

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("Calling SO CreateServiceInstance with msoPayload : " + msoPayload.toString());
        }

        try {
            ResponseEntity<CreateServiceInstanceResponse> response = restTemplate.exchange(createSoUrl, HttpMethod.POST,
                    new HttpEntity<>(msoPayload, buildRequestHeader()), CreateServiceInstanceResponse.class);

            logResponsePost(createSoUrl, response);
            return response;

        } catch (BackendFunctionalException e) {
            LOGGER.error(ERROR_ON_CALLING + createSoUrl + " ," + e.getHttpStatus() + " , " + e.getBodyResponse());
            return new ResponseEntity(e.getBodyResponse(), e.getHttpStatus());
        } catch (ResourceAccessException e) {
            LOGGER.error(ERROR_ON_CALLING + createSoUrl + " ," + e.getMessage());
            return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }

    public ResponseEntity<CreateMacroServiceInstanceResponse> callMacroCreateServiceInstance(MSOPayload msoPayload) {

        if (LOGGER.isDebugEnabled()) {
          LOGGER.debug("Calling SO CreateServiceInstance with msoPayload : " + msoPayload.toString());
        }

        try {
          ResponseEntity<CreateMacroServiceInstanceResponse> response = restTemplate.exchange(createSoUrl,
                   HttpMethod.POST, new HttpEntity<>(msoPayload, buildRequestHeader()),CreateMacroServiceInstanceResponse.class);
          
          logMacroResponsePost(createSoUrl, response);
          return response;
        } catch (BackendFunctionalException e) {
          LOGGER.error(ERROR_ON_CALLING + createSoUrl + " ," + e.getHttpStatus() + " , " + e.getBodyResponse());
          return new ResponseEntity(e.getBodyResponse(), e.getHttpStatus());
        } catch (ResourceAccessException e) {
          LOGGER.error(ERROR_ON_CALLING + createSoUrl + " ," + e.getMessage());
          return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }
    
    public ResponseEntity<CreateE2EServiceInstanceResponse> callE2ECreateServiceInstance(MSOE2EPayload msoPayloadE2E) {

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("Calling SO CreateServiceInstanceE2E with msoPayload : " + msoPayloadE2E.toString());
        }

        try {
            ResponseEntity<CreateE2EServiceInstanceResponse> response = restTemplate.exchange(createE2ESoUrl,
                    HttpMethod.POST, new HttpEntity<>(msoPayloadE2E, buildRequestHeader()),
                    CreateE2EServiceInstanceResponse.class);

            logE2EResponsePost(createE2ESoUrl, response);
            return response;

        } catch (BackendFunctionalException e) {
            LOGGER.error(ERROR_ON_CALLING + createE2ESoUrl + " ," + e.getHttpStatus() + " , " + e.getBodyResponse());
            return new ResponseEntity(e.getBodyResponse(), e.getHttpStatus());
        } catch (ResourceAccessException e) {
            LOGGER.error(ERROR_ON_CALLING + createE2ESoUrl + " ," + e.getMessage());
            return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }

    public ResponseEntity<CreateServiceInstanceResponse> callDeleteServiceInstance(MSOPayload msoPayload,
            String serviceId) {

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("Calling SO DeleteServiceInstance with msoPayload : " + msoPayload.toString());
        }

        String url = deleteSoUrl + serviceId;

        try {
            ResponseEntity<CreateServiceInstanceResponse> response = restTemplate.exchange(url, HttpMethod.DELETE,
                    new HttpEntity<>(msoPayload, buildRequestHeader()), CreateServiceInstanceResponse.class);

            logResponsePost(url, response);
            return response;

        } catch (BackendFunctionalException e) {
            LOGGER.error(ERROR_ON_CALLING + url + " ," + e);
            return new ResponseEntity<>(e.getHttpStatus());
        } catch (ResourceAccessException e) {
            LOGGER.error(ERROR_ON_CALLING + url + " ," + e);
            return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }

    }
    //Delete Macro
    
    public ResponseEntity<CreateMacroServiceInstanceResponse> callMacroDeleteServiceInstance(MSOPayload msoPayload,
            String serviceId) {

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("Calling SO Macro DeleteServiceInstance with msoPayload : " + msoPayload.toString());
        }

        String url = deleteSoUrl + serviceId;

        try {
            ResponseEntity<CreateMacroServiceInstanceResponse> response = restTemplate.exchange(url, HttpMethod.DELETE,
                    new HttpEntity<>(msoPayload, buildRequestHeader()), CreateMacroServiceInstanceResponse.class);

            logMacroResponsePost(url, response);
            return response;

        } catch (BackendFunctionalException e) {
            LOGGER.error(ERROR_ON_CALLING + url + " ," + e);
            return new ResponseEntity<>(e.getHttpStatus());
        } catch (ResourceAccessException e) {
            LOGGER.error(ERROR_ON_CALLING + url + " ," + e);
            return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }

    }

    public ResponseEntity<CreateE2EServiceInstanceResponse> callE2EDeleteServiceInstance(String globalSubscriberId,
            String serviceType, String serviceInstanceId) {

        String url = deleteE2ESoUrl + serviceInstanceId;
        MSODeleteE2EPayload msoDeleteE2EPayload = new MSODeleteE2EPayload();
        msoDeleteE2EPayload.setGlobalSubscriberId(globalSubscriberId);
        msoDeleteE2EPayload.setServiceType(serviceType);

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("Calling SO DeleteE2EServiceInstance with url : " + url + " MSODeleteE2EPayload : "
                    + msoDeleteE2EPayload.toString());
        }

        try {
            ResponseEntity<DeleteE2EServiceInstanceResponse> deleteresponse = restTemplate.exchange(url,
                    HttpMethod.DELETE, new HttpEntity<>(msoDeleteE2EPayload, buildRequestHeader()),
                    DeleteE2EServiceInstanceResponse.class);

	    CreateE2EServiceInstanceResponse dummyresponse = buildDummyResponse(serviceInstanceId,
            		deleteresponse.getBody().getOperationId());
            ResponseEntity<CreateE2EServiceInstanceResponse> response =
                    new ResponseEntity(dummyresponse, deleteresponse.getStatusCode());
            logE2EResponsePost(url, response);
            return response;

        } catch (BackendFunctionalException e) {
            LOGGER.error(ERROR_ON_CALLING + url + " ," + e);
            return new ResponseEntity<>(e.getHttpStatus());
        } catch (ResourceAccessException e) {
            LOGGER.error(ERROR_ON_CALLING + url + " ," + e);
            return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }
    }
 	public ResponseEntity<CreateE2EServiceInstanceResponse> callServiceActivationE2EService(String globalSubscriberId,
			String serviceType, String serviceInstanceId, String operation) {
    	String url = new StringBuilder(activationE2ESoUrl).append(serviceInstanceId).append("/").append(operation).toString();
		MSOE2EServiceActivationPayload msoE2EServiceActivationPayload = new MSOE2EServiceActivationPayload();
		msoE2EServiceActivationPayload.setGlobalSubscriberId(globalSubscriberId);
		msoE2EServiceActivationPayload.setServiceType(serviceType);

		if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("Calling SO E2E Service Activation/Deactivation  with url : " + url + " MSOE2EServiceActivationPayload : "
                    + msoE2EServiceActivationPayload.toString());
        }

        try {
            ResponseEntity<MSOE2EServiceActivationReponse> activationResponse = restTemplate.exchange(url,
                    HttpMethod.POST, new HttpEntity<>(msoE2EServiceActivationPayload, buildRequestHeader()),
                    MSOE2EServiceActivationReponse.class);
            CreateE2EServiceInstanceResponse dummyresponse = buildDummyResponse(serviceInstanceId,
            		activationResponse.getBody().getOperationId());

            ResponseEntity<CreateE2EServiceInstanceResponse> response =
                    new ResponseEntity(dummyresponse, activationResponse.getStatusCode());
            logE2EResponsePost(url, response);
            return response;

        } catch (BackendFunctionalException e) {
            LOGGER.error(ERROR_ON_CALLING + url + " ," + e);
            return new ResponseEntity<>(e.getHttpStatus());
        } catch (ResourceAccessException e) {
            LOGGER.error(ERROR_ON_CALLING + url + " ," + e);
            return new ResponseEntity<>(HttpStatus.INTERNAL_SERVER_ERROR);
        }

	}

	/**
	 * @param serviceInstanceId
	 * @param operationId
	 * @return
	 * For E2E Services , Create and Delete/Activate/Deactivate Service responses are different,
	 * to maintain consistentcy with ServiceInstances Copy contents of ServiceActivationE2EReponse
	 * to CreateE2EServiceInstanceResponse
	 */
	private CreateE2EServiceInstanceResponse buildDummyResponse(String serviceInstanceId,
			String operationId) {
		CreateE2EServiceInstanceResponse dummyresponse = new CreateE2EServiceInstanceResponse();
		ServiceResponse serviceResponse = new ServiceResponse();
		dummyresponse.setService(serviceResponse);
		dummyresponse.getService().setOperationId(operationId);
		dummyresponse.getService().setServiceId(serviceInstanceId);
		return dummyresponse;
	}
    private void logResponsePost(String url, ResponseEntity<CreateServiceInstanceResponse> response) {
        LOGGER.info(RESPONSE_STATUS + response.getStatusCodeValue());
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("response body : {}", response.getBody().toString());
        }

        if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.CREATED)) {
            LOGGER.warn("HTTP call SO on {} returns {} , {}", url, response.getStatusCodeValue(),
                    response.getBody().toString());
        }
    }

    private void logMacroResponsePost(String url, ResponseEntity<CreateMacroServiceInstanceResponse> response) {
      LOGGER.info(RESPONSE_STATUS + response.getStatusCodeValue());
      if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("response body : {}", response.getBody().toString());
      }
      
      if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.CREATED)) {
        LOGGER.warn("HTTP call SO on {} returns {} , {}", url, response.getStatusCodeValue(),
                    response.getBody().toString());
      }
    }
    
    private void logE2EResponsePost(String url, ResponseEntity<CreateE2EServiceInstanceResponse> response) {
        LOGGER.info(RESPONSE_STATUS + response.getStatusCodeValue());
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("response body : {}", response.getBody().toString());
        }

        if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.CREATED)) {
            LOGGER.warn("HTTP call SO on {} returns {} , {}", url, response.getStatusCodeValue(),
                    response.getBody().toString());
        }
    }

    public GetRequestStatusResponse callGetRequestStatus(String requestId) {
        String url = getSoStatus + requestId;

        try {

            ResponseEntity<GetRequestStatusResponse> response = restTemplate.exchange(url, HttpMethod.GET,
                    new HttpEntity<>(buildRequestHeader()), GetRequestStatusResponse.class);
            logResponseGet(url, response);
            if (null == response) {
                return null;
            } else {
                return response.getBody();
            }

        } catch (BackendFunctionalException | ResourceAccessException e) {
            LOGGER.error(ERROR_ON_CALLING + url + " ," + e);
            return null;
        }
    }

    public void callCheckConnectivity() {
        String url = SoHealthCheck;
        restTemplate.exchange(url, HttpMethod.GET, new HttpEntity<>(buildRequestHeader()), String.class);

    }

    public GetE2ERequestStatusResponse callE2EGetRequestStatus(String operationId, String serviceId) {

        String callUrlFormated = getE2ESoStatus.replace("$serviceId", serviceId);
        callUrlFormated = callUrlFormated.replace("$operationId", operationId);

        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("Calling SO callE2EGetRequestStatus with url : " + callUrlFormated);
        }

        try {

            ResponseEntity<GetE2ERequestStatusResponse> response = restTemplate.exchange(callUrlFormated,
                    HttpMethod.GET, new HttpEntity<>(buildRequestHeader()), GetE2ERequestStatusResponse.class);
            logE2EResponseGet(callUrlFormated, response);
            if (null == response) {
                return null;
            } else {
                return response.getBody();
            }

        } catch (BackendFunctionalException | ResourceAccessException e) {
            LOGGER.error(ERROR_ON_CALLING + callUrlFormated + " ," + e);
            return null;
        }
    }

    private void logResponseGet(String url, ResponseEntity<GetRequestStatusResponse> response) {
        if (response != null) {
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("response status : {} , response body : {}", response.getStatusCodeValue(),
                        response.getBody().toString());
            }
            if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.OK)) {
                LOGGER.warn("HTTP call SO on {} returns {} , {}", url, response.getStatusCodeValue(),
                        response.getBody().toString());
            }
        } else {
            if (LOGGER.isWarnEnabled()) {
                LOGGER.warn("no response calling url {}", url);
            }
        }
    }

    private void logE2EResponseGet(String url, ResponseEntity<GetE2ERequestStatusResponse> response) {
        if (response != null) {
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("response status : {} , response body : {}", response.getStatusCodeValue(),
                        response.getBody().toString());
            }
            if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.OK)) {
                LOGGER.warn("HTTP call SO on {} returns {} , {}", url, response.getStatusCodeValue(),
                        response.getBody().toString());
            }
        } else {
            if (LOGGER.isWarnEnabled()) {
                LOGGER.warn("no response calling url {}", url);
            }
        }
    }

    private HttpHeaders buildRequestHeader() {
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.add(HEADER_AUTHORIZATION, soHeaderAuthorization);
        httpHeaders.add(X_ONAP_PARTNER_HEADER, soOnapPartnerName);
        httpHeaders.add("Accept", "application/json");
        httpHeaders.add("Content-Type", "application/json");
        return httpHeaders;
    }

}