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package com.shapestone.session;

import com.shapestone.rest.jersey.hystrix.rx.HystrixRxCommand;
import com.shapestone.rest.jersey.hystrix.rx.HystrixRxMethod;
import rx.Observable;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.Entity;

import static java.util.UUID.randomUUID;
import static org.glassfish.jersey.client.rx.rxjava.RxObservable.from;

/**
 * Name: Michael Williams
 * Date: 9/12/16.
 */
public class SessionClient {

  private SessionClientData sessionClientData;
  private Client client;

  public SessionClient(SessionClientData sessionClientData, Client client) {
    this.sessionClientData = sessionClientData;
    this.client = client;
  }

  public Observable getOrCreatedSessionByPartyId(String userAgent, String ipAddress, String acceptLanguage,
                                                          String fingerPrint, String partyId, String customerPartyId) {
    return this.getOrCreatedSessionByPartyId(userAgent, ipAddress, acceptLanguage, fingerPrint, partyId, customerPartyId, null);
  }

  @SuppressWarnings("SameParameterValue")
  public Observable getOrCreatedSessionByPartyId(String userAgent, String ipAddress, String acceptLanguage,
                                                          String fingerPrint, String partyId, String customerPartyId,
                                                          String correlationId) {
    final HystrixRxMethod> hystrixMethod = () ->
      from(client.target(sessionClientData.getUrl()))
        .path("/sessions/parties/{partyId}")
        .resolveTemplate("partyId", partyId)
        .request()
        .header("User-Agent", userAgent)
        .header("Ip-Address", ipAddress)
        .header("Accept-Language", acceptLanguage)
        .header("Finger-Print", fingerPrint)
        .header("customerPartyId", customerPartyId)
        .header("correlationId", determineCorrelationId(correlationId))
        .rx()
        .post(Entity.json(null), Session.class);
    final String commandKey = "getOrCreatedSessionByPartyId";
    return new HystrixRxCommand<>(sessionClientData, hystrixMethod, commandKey).observe();
  }

  public Observable activeSessionExists(String sessionId) {
    return this.activeSessionExists(sessionId, null);
  }

  public Observable activeSessionExists(String sessionId, String correlationId) {
    final HystrixRxMethod> hystrixMethod = () ->
      from(client.target(sessionClientData.getUrl()))
          .path("/sessions/{sessionId}/is-active")
          .resolveTemplate("sessionId", sessionId)
          .request()
          .header("correlationId", determineCorrelationId(correlationId))
          .rx()
          .get(Boolean.class);
    final String commandKey = "activeSessionExists";
    return new HystrixRxCommand<>(sessionClientData, hystrixMethod, commandKey).observe();
  }

  public Observable getSessionById(String sessionId, String correlationId) {
    final HystrixRxMethod> hystrixMethod = () ->
      from(client.target(sessionClientData.getUrl()))
        .path("/sessions/{sessionId}")
        .resolveTemplate("sessionId", sessionId)
        .request()
        .header("correlationId", determineCorrelationId(correlationId))
        .rx()
        .get(Session.class);
    final String commandKey = "getSessionById";
    return new HystrixRxCommand<>(sessionClientData, hystrixMethod, commandKey).observe();
  }

  public Observable getActiveSessionById(String sessionId, String correlationId) {
    final HystrixRxMethod> hystrixMethod = () ->
      from(client.target(sessionClientData.getUrl()))
        .path("/sessions/{sessionId}/active")
        .resolveTemplate("sessionId", sessionId)
        .request()
        .header("correlationId", determineCorrelationId(correlationId))
        .rx()
        .get(Session.class);
    final String commandKey = "getActiveSessionById";
    return new HystrixRxCommand<>(sessionClientData, hystrixMethod, commandKey).observe();
  }

  private String determineCorrelationId(String correlationId) {
    return correlationId != null ? correlationId : randomUUID().toString();
  }

}