import tests.production_fixtures
import argparse
import fractions
import pathlib
import tempfile
import unittest
import unittest.mock

import generator.__main__
import generator.accompaniment
import generator.arrange.generate
import generator.guitar
import generator.fretboard
import generator.harmony
import generator.model
import generator.musicxml
import generator.parts
import generator.pitch
import tests.solo_fixtures
import tests.test_musicxml

class MusicModelTests(unittest.TestCase):
  def setUp(self):
    tests.production_fixtures.install(self)
    engraving = unittest.mock.patch('generator.engraving.pipeline.engrave_tree')
    engraving.start()
    self.addCleanup(engraving.stop)
    catalog = unittest.mock.patch('generator.catalog.build_catalog')
    catalog.start()
    self.addCleanup(catalog.stop)
    artwork = unittest.mock.patch('generator.pico_artwork.generate_titles')
    artwork.start()
    self.addCleanup(artwork.stop)
  def test_chord_semantics_are_not_voicing_heuristics(self):
    cases = {'C': {0, 4, 7}, 'Cdim': {0, 3, 6}, 'Cdim7': {0, 3, 6, 9}, 'Csus2': {0, 2, 7},
      'C7b5': {0, 4, 6, 10}, 'G7b9': {7, 11, 2, 5, 8}, 'Fmaj7#11': {5, 9, 0, 4, 11}}
    for label, expected in cases.items():
      self.assertEqual(set(generator.harmony.pitch_classes(generator.harmony.parse_symbol(label))), expected, label)
    for label, essentials in [('G7b9', {11, 5, 8}), ('C13', {4, 10, 9})]:
      definition = generator.harmony.parse_symbol(label)
      pitches = generator.fretboard.chord_pitches(definition, generator.guitar.chord_positions(generator.fretboard.chord_requirements(definition))[0])
      self.assertTrue(essentials.issubset({generator.model.pitch_number(p) % 12 for p in pitches}), label)
    with self.assertRaises(ValueError):
      generator.harmony.parse_symbol('Cunrecognized')
  def test_transposition_preserves_spelling_octaves_modes(self):
    for p in ({'letter': 'b', 'alter': 1, 'octave': 4}, {'letter': 'c', 'alter': -1, 'octave': 4}, {'letter': 'f', 'alter': 2, 'octave': 4}):
      p['alter'] = generator.model.rational(p['alter'])
      self.assertEqual(generator.pitch.shift_pitch(p, 0, 0), p)
      self.assertEqual(generator.model.pitch_number(generator.pitch.shift_pitch(p, 1, 2)), generator.model.pitch_number(p) + 2)
    source = tests.test_musicxml.parse(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note(), attributes='<key><fifths>-3</fifths><mode>minor</mode></key><transpose><diatonic>1</diatonic><chromatic>2</chromatic></transpose>'))
    result = generator.pitch.concert_document(source)
    self.assertEqual(result['metadata']['key_signature'], 'D minor')
    self.assertEqual(result['metadata']['key']['alterations'], generator.model.key_from_fifths(-1, 'minor')['alterations'])
  def test_additive_and_compound_grouping(self):
    self.assertEqual(generator.model.beat_lengths({'groups': [{'beats': [3, 2], 'unit': 8}]}), [fractions.Fraction(3, 2), fractions.Fraction(1)])
    self.assertEqual(generator.model.beat_lengths({'groups': [{'beats': [6], 'unit': 8}]}), [fractions.Fraction(3, 2)] * 2)
    self.assertEqual(generator.model.beat_lengths({'groups': [{'beats': [3], 'unit': 4}]}), [fractions.Fraction(1)] * 3)
  def test_generated_rhythm_follows_mid_measure_meter(self):
    change = '<attributes><time><beats>6</beats><beat-type>8</beat-type></time></attributes>'
    source = tests.test_musicxml.parse(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note(duration=1, kind='quarter') + change + tests.test_musicxml.xml_note(duration=3, kind='half', extra='<dot/>')))
    measure = source['staves'][0]['measures'][0]
    events = generator.parts.generated_voice(measure, 'slash')
    self.assertEqual([generator.model.fraction(n['onset']) for n in events], [0, 1, fractions.Fraction(5, 2)])
    self.assertEqual([generator.model.fraction(n['duration']) for n in events], [1, fractions.Fraction(3, 2), fractions.Fraction(3, 2)])
  def test_harmony_carry_uses_last_event_and_never_future_event(self):
    c = generator.harmony.parse_symbol('C7') | {'onset': generator.model.rational(0)}
    f = generator.harmony.parse_symbol('F7') | {'onset': generator.model.rational(2)}
    measures = [{'harmonies': [c, f]}, {'harmonies': []}]
    self.assertEqual(generator.accompaniment.carried_chords(measures), [None, f])
    self.assertIsNone(generator.accompaniment.active_chord({'harmonies': [f]}, fractions.Fraction(0), None))
    self.assertEqual(generator.accompaniment.active_chord(measures[0], fractions.Fraction(1), None), c)
  def test_tuplet_ratios_and_tie_links_validated(self):
    document = tests.test_musicxml.parse(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note()))
    tests.test_musicxml.notes(document)[0]['pitches'][0]['tie_to'] = 'missing'
    with self.assertRaisesRegex(ValueError, 'dangling tie'):
      generator.model.validate_document(document)
    document = tests.test_musicxml.parse(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note()))
    tests.test_musicxml.notes(document)[0]['duration'] = {'numerator': 8, 'denominator': 2}
    with self.assertRaisesRegex(ValueError, 'reduced'):
      generator.model.validate_document(document)
  def test_optional_turnaround_and_form(self):
    source = generator.musicxml.load_musicxml(pathlib.Path('data/songs/all-of-me.xml'))
    for part in ('acoustic', 'electric', 'vocal'):
      result = generator.arrange.generate.arrange_document(source, part)
      generator.model.validate_document(result)
      measures = result['staves'][0]['measures']
      self.assertEqual([m['section_label'] for m in measures if m.get('section_label')], ['Rhythm Lead-in', 'Vocal Melody', 'Guitar Melody', 'Acoustic Solo', 'Electric Solo', 'Vocal Melody', 'Ending'])
      self.assertFalse(measures[-1]['harmonies'])
      self.assertTrue(any(h for m in measures[:-1] for h in m['harmonies']))
      self.assertFalse(any('chord_optional' in h for m in measures for h in m['harmonies']))
      labels = [h['symbol'] for m in measures[:-1] for h in m['harmonies']]
      self.assertIn('(Am7)', labels)
      self.assertIn('(D7)', labels)
  def test_legacy_repeat_model_fields_are_rejected(self):
    for field in ('repeats', 'endings', 'initial_attributes'):
      source = tests.test_musicxml.parse(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note()))
      source['staves'][0]['measures'][0][field] = {}
      with self.assertRaisesRegex(ValueError, 'repeat notation'):
        generator.model.validate_document(source)
    for field in ('sound_ties', 'printed_ties'):
      source = tests.test_musicxml.parse(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note()))
      tests.test_musicxml.notes(source)[0]['pitches'][0][field] = []
      with self.assertRaisesRegex(ValueError, 'pass-specific tie'):
        generator.model.validate_document(source)
  def test_failure_preserves_generated_assets(self):
    with tempfile.TemporaryDirectory() as temp:
      root = pathlib.Path(temp)
      data = root / 'data'
      (data / 'songs').mkdir(parents=True)
      (data / 'songs' / 'bad.xml').write_text(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note(duration=5)), encoding='utf-8')
      output = root / 'output'
      output.mkdir()
      (output / 'last-good').write_text('preserved')
      args = argparse.Namespace(data_dir=data, output_dir=output, static_assets_dir=pathlib.Path('package/assets'), check=False)
      with self.assertRaises(ValueError):
        generator.__main__.generate_assets(args)
      self.assertEqual((output / 'last-good').read_text(), 'preserved')
      (data / 'songs' / 'bad.xml').write_text(tests.test_musicxml.xml_score('<harmony><root><root-step>C</root-step></root><kind>major</kind></harmony>' + tests.test_musicxml.xml_note()), encoding='utf-8')
      args.check = True
      # --check uses the validation-only repository fixture. An alternate
      # source tree fails its form contract before atomic publication.
      with self.assertRaisesRegex(ValueError, 'performance generator drift'):
        generator.__main__.generate_assets(args)
      self.assertEqual((output / 'last-good').read_text(), 'preserved')
  def test_instrument_transposition_is_converted_once(self):
    source = tests.test_musicxml.parse(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note(), attributes='<transpose><diatonic>-1</diatonic><chromatic>-2</chromatic></transpose>'))
    concert = generator.pitch.concert_document(source)
    p = tests.test_musicxml.notes(concert)[0]['pitches'][0]
    self.assertEqual((p['letter'], generator.model.fraction(p['alter']), p['octave']), ('b', -1, 3))
    self.assertEqual(generator.pitch.concert_document(concert), concert)
    self.assertEqual(concert['metadata']['key_signature'], 'Bb')
  def test_deterministic_generation_and_removal(self):
    with tempfile.TemporaryDirectory() as temp:
      data, output = pathlib.Path(temp) / 'data', pathlib.Path(temp) / 'output'
      (data / 'songs').mkdir(parents=True)
      source = data / 'songs' / 'fixture.xml'
      source.write_text(tests.test_musicxml.xml_score('<harmony><root><root-step>C</root-step></root><kind>major</kind></harmony>' + tests.test_musicxml.xml_note()), encoding='utf-8')
      args = argparse.Namespace(data_dir=data, output_dir=output, static_assets_dir=pathlib.Path('package/assets'), check=False)
      generator.__main__.generate_assets(args)
      first = {p.relative_to(output): p.read_bytes() for p in output.rglob('*') if p.is_file()}
      generator.__main__.generate_assets(args)
      self.assertEqual(first, {p.relative_to(output): p.read_bytes() for p in output.rglob('*') if p.is_file()})
      source.unlink()
      generator.__main__.generate_assets(args)
      self.assertFalse(list(output.rglob('*.json')))
      self.assertFalse(list(output.rglob('*.png')))
  def test_pickup_tie_survives_vocal_restoration(self):
    source = tests.test_musicxml.xml_score(tests.test_musicxml.xml_note(duration=1, kind='quarter', extra='<tie type="start"/>'), implicit=True)
    source = source.replace('</measure></part>', '</measure><measure number="2">' + tests.test_musicxml.xml_note(extra='<tie type="stop"/>') + '</measure></part>')
    result = generator.arrange.generate.arrange_document(tests.test_musicxml.parse(source), 'vocal')
    generator.model.validate_document(result)
    measures = result['staves'][0]['measures']
    start = measures[0]['voices'][0]['notes'][-1]['pitches'][0]
    end = measures[1]['voices'][0]['notes'][0]['pitches'][0]
    self.assertEqual(start['tie_to'], end['id'])