/**
    * Copyright (c) 2012-2015, jcabi.com
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met: 1) Redistributions of source code must retain the above
    * copyright notice, this list of conditions and the following
    * disclaimer. 2) Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following
   * disclaimer in the documentation and/or other materials provided
   * with the distribution. 3) Neither the name of the jcabi.com nor
   * the names of its contributors may be used to endorse or promote
   * products derived from this software without specific prior written
   * permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
   * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
   * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package com.jcabi.odesk;
  
  import com.jcabi.aspects.Immutable;
  import com.jcabi.aspects.Loggable;
  import com.jcabi.http.Request;
  import com.jcabi.http.RequestURI;
  import com.jcabi.http.response.JsonResponse;
  import com.jcabi.http.response.RestResponse;
  import java.io.IOException;
  import java.math.BigDecimal;
  import java.net.HttpURLConnection;
  import java.util.ArrayList;
  import java.util.Collection;
  import javax.json.JsonString;
  import javax.validation.constraints.NotNull;
  import lombok.EqualsAndHashCode;
  import lombok.ToString;
  
  /**
   * RESTful {@link Adjustments}.
   *
   * @author Yegor Bugayenko (yegor@tpc2.com)
   * @version $Id: b8bb2cf74be022b5ad523accf1c6ed1e2856b7bb $
   * @since 0.1
   */
  @Immutable
  @ToString
  @Loggable(Loggable.DEBUG)
  @EqualsAndHashCode(of = "entry")
  final class RtAdjustments implements Adjustments {
  
      /**
       * Request to use.
       */
      private final transient Request entry;
  
      /**
       * Public ctor.
       * @param req Request
       * @param name Team ref/name
       */
      RtAdjustments(final Request req, final String name) {
          this.entry = req.uri()
              .path("v2/teams")
              .path(name)
              .path("adjustments.json")
              .back();
      }
  
      // @checkstyle ParameterNumber (10 lines)
      @Override
      @NotNull(message = "adjustment ID is never NULL")
      public String add(
          @NotNull(message = "engagement ref can't be NULL")
          final String engagement,
          @NotNull(message = "charge amount can't be NULL")
          final BigDecimal charge,
          @NotNull(message = "comments can't be NULL") final String comments,
          @NotNull(message = "notes can't be NULL") final String notes)
          throws IOException {
          RequestURI uri = this.entry.uri()
              .queryParam("engagement__reference", engagement)
              .queryParam("comments", comments)
              .queryParam("notes", notes);
          if (charge != null && charge.compareTo(BigDecimal.ZERO) != 0) {
              uri = uri.queryParam("charge_amount", charge.toString());
          }
          return uri.back().method(Request.POST).fetch()
              .as(RestResponse.class)
              .assertStatus(HttpURLConnection.HTTP_OK)
             .as(JsonResponse.class)
             .json().readObject().getJsonObject("adjustment")
             .getString("reference");
     }
 
     @Override
     @NotNull(message = "iterable of adjustments is never NULL")
     public Iterable<String> iterate() throws IOException {
         final Collection<JsonString> values = this.entry.fetch()
             .as(RestResponse.class)
             .assertStatus(HttpURLConnection.HTTP_OK)
             .as(JsonResponse.class)
             .json().readObject().getJsonArray("adjustments")
             .getValuesAs(JsonString.class);
         final Collection<String> refs = new ArrayList<String>(values.size());
         for (final JsonString val : values) {
             refs.add(val.getString());
         }
         return refs;
     }
 }