import json
import pathlib
import tempfile
import unittest
import unittest.mock

import generator.arrange.generate
import generator.parts
import generator.practice.generate
import generator.score
import generator.summary
import tests.rhythm_fixtures
import tests.test_musicxml

class CatalogTests(unittest.TestCase):
  def test_every_numbered_source_is_wired_to_three_part_paths(self):
    source = pathlib.Path('data/practice')
    sources = sorted(source.glob('*.xml'))
    self.assertEqual([p.name for p in sources], [f'{i:04}.xml' for i in range(1, 367)])
    expected = {pathlib.Path(path.stem) / (part + '.json') for path in sources for part in generator.parts.PART_TYPES}
    self.assertEqual(len(expected), 1098)
    with tempfile.TemporaryDirectory() as temporary, unittest.mock.patch('generator.practice.generate._practice_document', side_effect=lambda document, part, plan: document):
      output = pathlib.Path(temporary)
      self.assertEqual(generator.practice.generate.generate_practice_scores(source, output, rhythms=tests.rhythm_fixtures.library()), len(expected))
      self.assertEqual({p.relative_to(output) for p in output.rglob('*.json')}, expected)
      generator.summary.validate_practice_parts(output)
      generator.score.validate_generated_tree(output)
  def test_numbers_and_duplicate_titles_remain_distinct_and_songs_are_excluded(self):
    with tempfile.TemporaryDirectory() as temporary:
      source, output = pathlib.Path(temporary) / 'source', pathlib.Path(temporary) / 'output'
      source.mkdir(parents=True)
      for name in ('1000.xml', '0000.xml', '0001.xml', '0999.xml', '0010.xml', '0366.xml'):
        (source / name).write_text(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note()), encoding='utf-8')
      self.assertEqual(generator.practice.generate.generate_practice_scores(source, output, rhythms=tests.rhythm_fixtures.library()), 18)
      self.assertEqual(sorted(p.name for p in output.iterdir()), ['0000', '0001', '0010', '0366', '0999', '1000'])
      for directory in output.iterdir():
        self.assertEqual({p.name for p in directory.glob('*.json')}, {(part + '.json') for part in generator.parts.PART_TYPES})
        self.assertEqual(json.loads((directory / 'vocal.json').read_text())['metadata']['title'], 'Fixture')
  def test_invalid_names_and_legacy_nesting_preserve_output(self):
    for name in ('1.xml', '001.xml', '00001.xml', '\u0660\u0660\u0660\u0661.xml', '0001-copy.xml', '0001_copy.xml', 'chord/0001.xml', 'practice/melody/lesson/0001.xml'):
      with self.subTest(name=name), tempfile.TemporaryDirectory() as temporary:
        source, output = pathlib.Path(temporary) / 'source', pathlib.Path(temporary) / 'output'
        for relative in ('0002.xml', name):
          path = source / relative
          path.parent.mkdir(parents=True, exist_ok=True)
          path.write_text(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note()), encoding='utf-8')
        output.mkdir()
        sentinel = output / 'existing'
        sentinel.write_text('unchanged')
        with self.assertRaisesRegex(ValueError, 'practice sources'):
          generator.practice.generate.generate_practice_scores(source, output, rhythms=tests.rhythm_fixtures.library())
        self.assertEqual(list(output.iterdir()), [sentinel])
        self.assertEqual(sentinel.read_text(), 'unchanged')
  def test_empty_part_directory_fails(self):
    with tempfile.TemporaryDirectory() as temporary:
      root = pathlib.Path(temporary)
      (root / '0001').mkdir()
      with self.assertRaisesRegex(ValueError, 'practice generator drift'):
        generator.summary.validate_practice_parts(root)
  def test_songs_generate_only_authored_key_parts(self):
    with tempfile.TemporaryDirectory() as temporary:
      source, output = pathlib.Path(temporary) / 'songs', pathlib.Path(temporary) / 'output'
      source.mkdir()
      (source / 'song.xml').write_text(tests.test_musicxml.xml_score(tests.test_musicxml.xml_note('E', alter=-1), '<key><fifths>-3</fifths></key>'))
      self.assertEqual(generator.arrange.generate.generate_performance_scores(source, output, rhythms=tests.rhythm_fixtures.library()), 3)
      self.assertEqual({p.name for p in output.iterdir()}, {'song-acoustic.json', 'song-electric.json', 'song-vocal.json'})
      for path in output.iterdir():
        metadata = json.loads(path.read_text())['metadata']
        self.assertEqual(metadata['key_signature'], 'Eb')
        self.assertNotIn('variant_tonic', metadata)