content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.camel.quarkus.component.xchange.it;
  
  import java.net.URI;
  import java.util.List;
  import java.util.Optional;
  
  import jakarta.enterprise.context.ApplicationScoped;
  import jakarta.inject.Inject;
  import jakarta.inject.Named;
  import jakarta.json.Json;
  import jakarta.json.JsonArrayBuilder;
  import jakarta.json.JsonObject;
  import jakarta.ws.rs.GET;
  import jakarta.ws.rs.Path;
  import jakarta.ws.rs.PathParam;
  import jakarta.ws.rs.Produces;
  import jakarta.ws.rs.QueryParam;
  import jakarta.ws.rs.core.MediaType;
  import org.apache.camel.ProducerTemplate;
  import org.apache.camel.component.xchange.XChangeComponent;
  import org.apache.camel.spi.annotations.Component;
  import org.eclipse.microprofile.config.Config;
  import org.eclipse.microprofile.config.ConfigProvider;
  import org.knowm.xchange.Exchange;
  import org.knowm.xchange.ExchangeFactory;
  import org.knowm.xchange.ExchangeSpecification;
  import org.knowm.xchange.binance.BinanceExchange;
  import org.knowm.xchange.currency.Currency;
  import org.knowm.xchange.currency.CurrencyPair;
  import org.knowm.xchange.dto.marketdata.Ticker;
  import org.knowm.xchange.dto.meta.CurrencyMetaData;
  import org.knowm.xchange.dto.meta.InstrumentMetaData;
  import org.knowm.xchange.kraken.KrakenExchange;
  
  @Path("/xchange")
  @ApplicationScoped
  public class XchangeResource {
  
      public static final String DEFAULT_CRYPTO_EXCHANGE = "binance";
      public static final String ALTERNATIVE_CRYPTO_EXCHANGE = "kraken";
  
      @Inject
      ProducerTemplate producerTemplate;
  
      @Path("/ticker/{exchange}")
      @GET
      @Produces(MediaType.APPLICATION_JSON)
      public JsonObject currencyTicker(
              @PathParam("exchange") String cryptoExchange,
              @QueryParam("currencyPair") String currencyPair) {
  
          Ticker ticker = producerTemplate.requestBody(
                  "xchange:" + cryptoExchange + "?service=marketdata&method=ticker&currencyPair=" + currencyPair, null,
                  Ticker.class);
          return Json.createObjectBuilder()
                  .add("last", ticker.getLast().longValue())
                  .add("bid", ticker.getBid().longValue())
                  .add("ask", ticker.getAsk().longValue())
                  .build();
      }
  
      @Path("/currency")
      @GET
      @Produces(MediaType.APPLICATION_JSON)
      @SuppressWarnings("unchecked")
      public JsonObject currencies() {
          List<Currency> currencies = producerTemplate.requestBody(
                  "xchange:" + DEFAULT_CRYPTO_EXCHANGE + "?service=metadata&method=currencies", null,
                  List.class);
          JsonArrayBuilder builder = Json.createArrayBuilder();
          currencies.forEach(c -> builder.add(c.getSymbol()));
          return Json.createObjectBuilder().add("currencies", builder.build()).build();
      }
  
      @Path("/currency/metadata/{symbol}")
      @GET
      @Produces(MediaType.TEXT_PLAIN)
      public String currencyMetadata(@PathParam("symbol") String symbol) {
          CurrencyMetaData metaData = producerTemplate.requestBody(
                  "xchange:" + DEFAULT_CRYPTO_EXCHANGE + "?service=metadata&method=currencyMetaData",
                  Currency.getInstance(symbol), CurrencyMetaData.class);
          return metaData.getScale().toString();
      }
  
      @Path("/currency/pairs")
      @GET
      @Produces(MediaType.APPLICATION_JSON)
      @SuppressWarnings("unchecked")
      public JsonObject currencyPairs() {
          List<CurrencyPair> currencyPairs = producerTemplate.requestBody(
                  "xchange:" + DEFAULT_CRYPTO_EXCHANGE + "?service=metadata&method=currencyPairs",
                  null, List.class);
          JsonArrayBuilder builder = Json.createArrayBuilder();
          currencyPairs.forEach(cp -> builder.add(cp.toString()));
          return Json.createObjectBuilder().add("currencyPairs", builder.build()).build();
      }
  
      @Path("/currency/pairs/metadata")
      @GET
      @Produces(MediaType.TEXT_PLAIN)
      public String currencyPairsMetadata(@QueryParam("base") String base, @QueryParam("counter") String counter) {
          InstrumentMetaData metaData = producerTemplate.requestBody(
                  "xchange:" + DEFAULT_CRYPTO_EXCHANGE + "?service=metadata&method=currencyPairMetaData",
                  new CurrencyPair(base, counter),
                  InstrumentMetaData.class);
          return metaData.getTradingFee().toPlainString();
      }
  
      @Named("xchange")
      public XChangeComponent xChangeComponent() {
          Config config = ConfigProvider.getConfig();
          Optional<String> wireMockUrl = config.getOptionalValue("wiremock.url", String.class);
          if (wireMockUrl.isPresent()) {
              return new WireMockedXChangeComponent();
          }
          return new XChangeComponent();
      }
  
      @Component("xchange")
      static final class WireMockedXChangeComponent extends XChangeComponent {
          @Override
          protected Exchange createExchange(Class<? extends Exchange> exchangeClass) {
              String wireMockUrlProperty;
              if (exchangeClass.equals(BinanceExchange.class)) {
                  wireMockUrlProperty = "wiremock.binance.url";
              } else if (exchangeClass.equals(KrakenExchange.class)) {
                  wireMockUrlProperty = "wiremock.kraken.url";
              } else {
                  throw new IllegalStateException("Unsupported WireMocked exchange " + exchangeClass.getSimpleName());
              }
  
              Config config = ConfigProvider.getConfig();
              String wireMockUrl = config.getValue(wireMockUrlProperty, String.class);
              URI uri = URI.create(wireMockUrl);
  
              ExchangeSpecification specification = new ExchangeSpecification(exchangeClass);
              specification.setHost("localhost");
              specification.setPort(uri.getPort());
              specification.setSslUri(wireMockUrl);
              return ExchangeFactory.INSTANCE.createExchange(specification);
          }
      }
  }
  