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/******************************************************************************
 * © 2020 SAP SE or an SAP affiliate company. All rights reserved.            *
 ******************************************************************************/

package com.sap.cloud.spring.boot.autoconfig.services;

import com.sap.cds.mtx.impl.XsuaaParams;
import com.sap.cloud.environment.servicebinding.api.DefaultServiceBinding;
import com.sap.cloud.mt.subscription.PollingParameters;
import com.sap.cloud.environment.servicebinding.api.ServiceBinding;
import com.sap.cloud.mt.subscription.ServiceManager;
import com.sap.cloud.mt.subscription.ServiceSpecification;
import com.sap.cloud.mt.subscription.exceptions.InternalError;
import com.sap.cloud.mt.tools.api.ResilienceConfig;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.CollectionUtils;

import java.time.Duration;
import java.util.HashMap;

import java.util.Map;

import static com.sap.cds.mtx.impl.XsuaaParams.CERTIFICATE;
import static com.sap.cds.mtx.impl.XsuaaParams.CERTURL;
import static com.sap.cds.mtx.impl.XsuaaParams.CLIENTID;
import static com.sap.cds.mtx.impl.XsuaaParams.CLIENT_SECRET;
import static com.sap.cds.mtx.impl.XsuaaParams.KEY;
import static com.sap.cds.mtx.impl.XsuaaParams.URL;
import static com.sap.cds.mtx.impl.XsuaaParams.XSAPPNAME;

@EnableConfigurationProperties
@Configuration("ComSapMtInstanceManagerForServiceManagerConfig")
@ConfigurationProperties(ServiceManagerAutoConfiguration.COM_SAP_CLOUD_SERVICE_MANAGER)
@ConditionalOnProperty(name = "com.sap.cloud.service-manager.base-url")
public class ServiceManagerAutoConfiguration {
    private static final String HANA_OFFERING_NAME = "hana";
    private static final String HANA_HDI_PLAN_NAME = "hdi-shared";
    private static final Logger logger = LoggerFactory.getLogger(ServiceManagerAutoConfiguration.class);
    public static final String COM_SAP_CLOUD_SERVICE_MANAGER = "com.sap.cloud.service-manager";
    public static final String SERVICE_MANAGER = "service-manager";
    public static final String SM_URL = "sm_url";
    private String instanceName;
    private String instanceGuid;
    private String baseUrl;
    private String tokenUrl;
    private String clientId;
    private String clientSecret;
    private String certificate;
    private String certUrl;
    private String xsappname;
    private String key;
    private final Map credentials = new HashMap<>();

    private PollingParameters polling = PollingParameters.Builder.create().interval(Duration.ofSeconds(10)).timeout(Duration.ofMinutes(20)).build();
    private ResilienceConfig resilienceConfig = ResilienceConfig.builder().baseWaitTime(Duration.ofMillis(500)).numOfRetries(3).build();

    @Bean("ComSapMtInstanceManagerClientForServiceManager")
    public ServiceManager client() {
        try {
            logger.debug("Create service manager");
            ServiceSpecification serviceSpecification = ServiceSpecification.Builder.create()
                    .resilienceConfig(resilienceConfig)
                    .polling(polling)
                    .build();
            return new ServiceManager(createBinding(), serviceSpecification, HANA_OFFERING_NAME, HANA_HDI_PLAN_NAME);
        } catch (InternalError e) {
            throw new RuntimeException(e);
        }
    }

    public ResilienceConfig getResilienceConfig() {
        return resilienceConfig;
    }

    public void setResilienceConfig(ResilienceConfig resilienceConfig) {
        this.resilienceConfig = resilienceConfig;
    }

    public PollingParameters getPolling() {
        return polling;
    }

    public void setPolling(PollingParameters polling) {
        this.polling = polling;
    }

    public String getInstanceName() {
        return instanceName;
    }

    public void setInstanceName(String instanceName) {
        this.instanceName = instanceName;
    }

    public String getBaseUrl() {
        return baseUrl;
    }

    public void setBaseUrl(String baseUrl) {
        this.baseUrl = baseUrl;
    }

    public String getTokenUrl() {
        return tokenUrl;
    }

    public void setTokenUrl(String tokenUrl) {
        this.tokenUrl = tokenUrl;
    }

    public String getClientId() {
        return clientId;
    }

    public void setClientId(String clientId) {
        this.clientId = clientId;
    }

    public String getClientSecret() {
        return clientSecret;
    }

    public void setClientSecret(String clientSecret) {
        this.clientSecret = clientSecret;
    }

    public String getInstanceGuid() {
        return instanceGuid;
    }

    public void setInstanceGuid(String instanceGuid) {
        this.instanceGuid = instanceGuid;
    }

    public String getCertificate() {
        return certificate;
    }

    public void setCertificate(String certificate) {
        this.certificate = certificate;
    }

    public String getCertUrl() {
        return certUrl;
    }

    public void setCertUrl(String certUrl) {
        this.certUrl = certUrl;
    }

    public String getXsappname() {
        return xsappname;
    }

    public void setXsappname(String xsappname) {
        this.xsappname = xsappname;
    }

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public Map getCredentials() {
        return credentials;
    }

    public void setCredentials(Map credentials) {
        if (!CollectionUtils.isEmpty(credentials)) {
            this.credentials.putAll(credentials);
        }
    }

    private XsuaaParams xsuaaParamsForSM() {
        transferIntoCredentials();
        return new XsuaaParams(credentials);
    }

    private void transferIntoCredentials() {
        if (CollectionUtils.isEmpty(credentials)) {
            if (!StringUtils.isBlank(tokenUrl)) {
                credentials.put(URL, tokenUrl);
            }
            if (!StringUtils.isBlank(clientId)) {
                credentials.put(CLIENTID, clientId);
            }
            if (!StringUtils.isBlank(clientSecret)) {
                credentials.put(CLIENT_SECRET, clientSecret);
            }
            if (!StringUtils.isBlank(certificate)) {
                credentials.put(CERTIFICATE, certificate);
            }
            if (!StringUtils.isBlank(certUrl)) {
                credentials.put(CERTURL, certUrl);
            }
            if (!StringUtils.isBlank(xsappname)) {
                credentials.put(XSAPPNAME, xsappname);
            }
            if (!StringUtils.isBlank(key)) {
                credentials.put(KEY, key);
            }
            if (!StringUtils.isBlank(baseUrl)) {
                credentials.put(SM_URL, baseUrl);
            }
        }
    }

    private ServiceBinding createBinding() {
        transferIntoCredentials();
        var parameters = new HashMap();
        return DefaultServiceBinding.builder()
                .copy(parameters)
                .withServiceName(SERVICE_MANAGER)
                .withName(instanceName)
                .withCredentials(credentials).build();
    }
}