/* Copyright 2002-2022 CS GROUP
    * Licensed to CS GROUP (CS) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * CS 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.orekit.files.ccsds.utils.generation;
  
  import java.io.CharArrayWriter;
  import java.io.IOException;
  
  import org.hipparchus.util.FastMath;
  import org.junit.Assert;
  import org.junit.Test;
  import org.orekit.utils.units.Unit;
  
  public class KvnGeneratorTest {
  
      @Test
      public void testSection() throws IOException {
          CharArrayWriter caw = new CharArrayWriter();
          try (Generator generator = new KvnGenerator(caw, 10, "", 25)) {
              generator.startMessage("abc", "CCSDS_ABC_VERSION", 99.0);
              generator.enterSection("BLOCK");
              generator.writeEntry("KEY", 1234567.8, Unit.parse("Hz"), false);
              generator.exitSection();
              generator.endMessage("abc");
              Assert.assertEquals("CCSDS_ABC_VERSION = 99.0\n" +
                                  "BLOCK_START\n" +
                                  "KEY        = 1234567.8   [Hz]\n" + 
                                  "BLOCK_STOP\n",
                                  caw.toString());
          }
      }
  
      @Test
      public void testCcsdsUnits() throws IOException {
          CharArrayWriter caw = new CharArrayWriter();
          try (Generator generator = new KvnGenerator(caw, 10, "", 25)) {
              generator.writeEntry("KEY_1",    1234567.8,   Unit.parse("km.kg³/√s"), false);
              generator.writeEntry("KEY_2",    1234567.8,   Unit.parse("n/a"),       false);
              generator.writeEntry("KEY_3",    1234567.8,   Unit.parse("1"),         false);
              generator.writeEntry("LOOOOONG", "1234567.8", null,                    false);
              Assert.assertEquals("KEY_1      = 1234.5678   [km*kg**3/s**0.5]\n" +
                                  "KEY_2      = 1234567.8\n" +
                                  "KEY_3      = 1234567.8\n" +
                                  "LOOOOONG   = 1234567.8\n",
                                  caw.toString());
          }
      }
  
      @Test
      public void testUnitsPadding() throws IOException {
          CharArrayWriter caw = new CharArrayWriter();
          try (Generator generator = new KvnGenerator(caw, 10, "", 20)) {
              generator.writeEntry("KEY_1", 0.5 * FastMath.PI, Unit.parse("°"), false);
              generator.writeEntry("KEY_2", FastMath.PI, Unit.parse("◦"), false);
              generator.writeEntry("PERCENT", 0.25, Unit.parse("%"), false);
              Assert.assertEquals("KEY_1      = 90.0   [deg]\n" +
                                  "KEY_2      = 180.0  [deg]\n" +
                                  "PERCENT    = 25.0   [%]\n",
                                  caw.toString());
          }
      }
  
      @Test
      public void testNoUnits() throws IOException {
          CharArrayWriter caw = new CharArrayWriter();
          try (Generator generator = new KvnGenerator(caw, 10, "", 0)) {
              generator.writeEntry("KEY_1", 0.5 * FastMath.PI, Unit.parse("°"), false);
              generator.writeEntry("KEY_2", FastMath.PI, Unit.parse("◦"), true);
              Assert.assertEquals("KEY_1      = 90.0\n" +
                                  "KEY_2      = 180.0\n", caw.toString());
          }
      }
  
  }