package jalview.datamodel;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;

import java.util.Arrays;
import java.util.List;

import org.junit.Before;
import org.junit.Test;

public class SequenceTest
{
  Sequence seq;

  @Before
  public void setUp()
  {
    seq = new Sequence("FER1", "AKPNGVL");
  }
  @Test
  public void testGetAnnotation()
  {
    // initial state returns null not an empty array
    assertNull(seq.getAnnotation());
    AlignmentAnnotation ann = addAnnotation("label1", "desc1", "calcId1",
            1f);
    AlignmentAnnotation[] anns = seq.getAnnotation();
    assertEquals(1, anns.length);
    assertSame(ann, anns[0]);

    // removing all annotations reverts array to null
    seq.removeAlignmentAnnotation(ann);
    assertNull(seq.getAnnotation());
  }

  @Test
  public void testGetAnnotation_forLabel()
  {
    AlignmentAnnotation ann1 = addAnnotation("label1", "desc1", "calcId1", 1f);
    AlignmentAnnotation ann2 = addAnnotation("label2", "desc2", "calcId2", 1f);
    AlignmentAnnotation ann3 = addAnnotation("label1", "desc3", "calcId3", 1f);
    AlignmentAnnotation[] anns = seq.getAnnotation("label1");
    assertEquals(2, anns.length);
    assertSame(ann1, anns[0]);
    assertSame(ann3, anns[1]);
  }

  private AlignmentAnnotation addAnnotation(String label,
          String description, String calcId,
          float value)
  {
    final AlignmentAnnotation annotation = new AlignmentAnnotation(label, description,
            value);
    annotation.setCalcId(calcId);
    seq.addAlignmentAnnotation(annotation);
    return annotation;
  }

  @Test
  public void testGetAlignmentAnnotations_forCalcIdAndLabel()
  {
    AlignmentAnnotation ann1 = addAnnotation("label1", "desc1", "calcId1",
            1f);
    AlignmentAnnotation ann2 = addAnnotation("label2", "desc2", "calcId2",
            1f);
    AlignmentAnnotation ann3 = addAnnotation("label2", "desc3", "calcId3",
            1f);
    AlignmentAnnotation ann4 = addAnnotation("label2", "desc3", "calcId2",
            1f);
    AlignmentAnnotation ann5 = addAnnotation("label5", "desc3", null,
            1f);
    AlignmentAnnotation ann6 = addAnnotation(null, "desc3", "calcId3",
            1f);
    List<AlignmentAnnotation> anns = seq.getAlignmentAnnotations("calcId2",
            "label2");
    assertEquals(2, anns.size());
    assertSame(ann2, anns.get(0));
    assertSame(ann4, anns.get(1));
    
    assertTrue(seq.getAlignmentAnnotations("calcId2", "label3").isEmpty());
    assertTrue(seq.getAlignmentAnnotations("calcId3", "label5").isEmpty());
    assertTrue(seq.getAlignmentAnnotations("calcId2", null).isEmpty());
    assertTrue(seq.getAlignmentAnnotations(null, "label3").isEmpty());
    assertTrue(seq.getAlignmentAnnotations(null, null).isEmpty());
  }

  /**
   * Tests for addAlignmentAnnotation. Note this method has the side-effect of
   * setting the sequenceRef on the annotation. Adding the same annotation twice
   * should be ignored.
   */
  @Test
  public void testAddAlignmentAnnotation()
  {
    assertNull(seq.annotation);
    final AlignmentAnnotation annotation = new AlignmentAnnotation("a",
            "b", 2d);
    assertNull(annotation.sequenceRef);
    seq.addAlignmentAnnotation(annotation);
    assertSame(seq, annotation.sequenceRef);
    AlignmentAnnotation[] anns = seq.getAnnotation();
    assertEquals(1, anns.length);
    assertSame(annotation, anns[0]);

    // re-adding does nothing
    seq.addAlignmentAnnotation(annotation);
    anns = seq.getAnnotation();
    assertEquals(1, anns.length);
    assertSame(annotation, anns[0]);

    // an identical but different annotation can be added
    final AlignmentAnnotation annotation2 = new AlignmentAnnotation("a",
            "b", 2d);
    seq.addAlignmentAnnotation(annotation2);
    anns = seq.getAnnotation();
    assertEquals(2, anns.length);
    assertSame(annotation, anns[0]);
    assertSame(annotation2, anns[1]);

  }

  /**
   * Test the method that returns an array, indexed by sequence position, whose
   * entries are the residue positions at the sequence position (or to the right
   * if a gap)
   */
  @Test
  public void testFindPositionMap()
  {
    /*
     * Note: Javadoc for findPosition says it returns the residue position to
     * the left of a gapped position; in fact it returns the position to the
     * right. Also it returns a non-existent residue position for a gap beyond
     * the sequence.
     */
    Sequence seq = new Sequence("TestSeq", "AB.C-D E.");
    int[] map = seq.findPositionMap();
    assertEquals(Arrays.toString(new int[]
    { 1, 2, 3, 3, 4, 4, 5, 5, 6 }), Arrays.toString(map));
  }

  /**
   * Test for getSubsequence
   */
  @Test
  public void testGetSubsequence()
  {
    SequenceI seq = new Sequence("TestSeq", "ABCDEFG");
    seq.createDatasetSequence();

    // positions are base 0, end position is exclusive
    SequenceI subseq = seq.getSubSequence(2, 4);

    assertEquals("CD", subseq.getSequenceAsString());
    // start/end are base 1 positions
    assertEquals(3, subseq.getStart());
    assertEquals(4, subseq.getEnd());
    // subsequence shares the full dataset sequence
    assertSame(seq.getDatasetSequence(), subseq.getDatasetSequence());
  }

  /**
   * Test for deriveSequence applied to a sequence with a dataset
   */
  @Test
  public void testDeriveSequence_existingDataset()
  {
    SequenceI seq = new Sequence("Seq1", "CD");
    seq.setDatasetSequence(new Sequence("Seq1", "ABCDEF"));
    seq.setStart(3);
    seq.setEnd(4);
    SequenceI derived = seq.deriveSequence();
    assertEquals("CD", derived.getSequenceAsString());
    assertSame(seq.getDatasetSequence(), derived.getDatasetSequence());
  }

  /**
   * Test for deriveSequence applied to an ungapped sequence with no dataset
   */
  @Test
  public void testDeriveSequence_noDatasetUngapped()
  {
    SequenceI seq = new Sequence("Seq1", "ABCDEF");
    assertEquals(1, seq.getStart());
    assertEquals(6, seq.getEnd());
    SequenceI derived = seq.deriveSequence();
    assertEquals("ABCDEF", derived.getSequenceAsString());
    assertEquals("ABCDEF", derived.getDatasetSequence()
            .getSequenceAsString());
  }

  /**
   * Test for deriveSequence applied to a gapped sequence with no dataset
   */
  @Test
  public void testDeriveSequence_noDatasetGapped()
  {
    SequenceI seq = new Sequence("Seq1", "AB-C.D EF");
    assertEquals(1, seq.getStart());
    assertEquals(6, seq.getEnd());
    assertNull(seq.getDatasetSequence());
    SequenceI derived = seq.deriveSequence();
    assertEquals("AB-C.D EF", derived.getSequenceAsString());
    assertEquals("ABCDEF", derived.getDatasetSequence()
            .getSequenceAsString());
  }
}