"""Tests pour le module xmp_writer."""

from json_to_metadata.xmp_writer import (
    _convert_exif_to_xmp,
    _format_rational,
    _format_xmp_date,
    generate_xmp_content,
    write_xmp_sidecar,
)


class TestGenerateXmpContent:
    """Tests pour la fonction generate_xmp_content."""

    def test_basic_structure(self):
        """Génère une structure XMP valide."""
        content = generate_xmp_content({})

        assert '<?xml version="1.0"' in content
        assert 'x:xmpmeta' in content
        assert 'rdf:RDF' in content
        assert 'rdf:Description' in content

    def test_includes_namespaces(self):
        """Inclut les namespaces requis."""
        content = generate_xmp_content({})

        assert 'xmlns:dc=' in content
        assert 'xmlns:exif=' in content
        assert 'xmlns:tiff=' in content
        assert 'xmlns:xmp=' in content

    def test_maps_camera_info(self):
        """Mappe les informations de l'appareil."""
        tags = {'Make': 'Nikon', 'Model': 'FM2'}

        content = generate_xmp_content(tags)

        assert '<tiff:Make>Nikon</tiff:Make>' in content
        assert '<tiff:Model>FM2</tiff:Model>' in content

    def test_maps_exposure(self):
        """Mappe les paramètres d'exposition."""
        tags = {'ISO': 400, 'FNumber': 2.8}

        content = generate_xmp_content(tags)

        assert 'ISOSpeedRatings' in content
        assert '400' in content
        assert 'FNumber' in content

    def test_escapes_special_characters(self):
        """Échappe les caractères spéciaux XML."""
        tags = {'ImageDescription': 'Test <avec> des & caractères "spéciaux"'}

        content = generate_xmp_content(tags)

        assert '&lt;avec&gt;' in content
        assert '&amp;' in content

    def test_includes_modify_date(self):
        """Inclut la date de modification."""
        content = generate_xmp_content({})

        assert 'xmp:ModifyDate' in content


class TestWriteXmpSidecar:
    """Tests pour la fonction write_xmp_sidecar."""

    def test_creates_xmp_file(self, tmp_path):
        """Crée un fichier XMP à côté de l'image."""
        image = tmp_path / 'photo.tif'
        image.write_bytes(b'fake image')
        tags = {'Make': 'Nikon'}

        xmp_path = write_xmp_sidecar(image, tags)

        assert xmp_path.exists()
        assert xmp_path.name == 'photo.xmp'
        assert xmp_path.parent == tmp_path

    def test_xmp_content_valid(self, tmp_path):
        """Le contenu du fichier XMP est valide."""
        image = tmp_path / 'photo.jpg'
        image.write_bytes(b'fake image')
        tags = {'Make': 'Nikon', 'Model': 'FM2'}

        xmp_path = write_xmp_sidecar(image, tags)
        content = xmp_path.read_text(encoding='utf-8')

        assert '<?xml version="1.0"' in content
        assert '<tiff:Make>Nikon</tiff:Make>' in content

    def test_dry_run_mode(self, tmp_path):
        """Le mode dry-run ne crée pas de fichier."""
        image = tmp_path / 'photo.tif'
        image.write_bytes(b'fake image')

        xmp_path = write_xmp_sidecar(image, {'Make': 'Nikon'}, dry_run=True)

        assert not xmp_path.exists()
        assert xmp_path.name == 'photo.xmp'

    def test_overwrites_existing_xmp(self, tmp_path):
        """Écrase un fichier XMP existant."""
        image = tmp_path / 'photo.tif'
        image.write_bytes(b'fake image')
        xmp_path = tmp_path / 'photo.xmp'
        xmp_path.write_text('old content')

        write_xmp_sidecar(image, {'Make': 'Canon'})
        content = xmp_path.read_text()

        assert 'Canon' in content
        assert 'old content' not in content

    def test_handles_different_extensions(self, tmp_path):
        """Fonctionne avec différentes extensions d'images."""
        for ext in ['.tif', '.avif', '.heic', '.webp', '.png']:
            image = tmp_path / f'photo{ext}'
            image.write_bytes(b'fake image')

            xmp_path = write_xmp_sidecar(image, {'Make': 'Test'})

            assert xmp_path.suffix == '.xmp'
            assert xmp_path.stem == 'photo'
            xmp_path.unlink()  # Nettoyer


class TestConvertExifToXmp:
    """Tests pour la fonction _convert_exif_to_xmp."""

    def test_make_mapping(self):
        """Mappe Make vers tiff:Make."""
        result = _convert_exif_to_xmp('Make', 'Nikon')

        assert '<tiff:Make>Nikon</tiff:Make>' in result

    def test_iso_mapping(self):
        """Mappe ISO avec structure rdf:Seq."""
        result = _convert_exif_to_xmp('ISO', 400)

        assert 'ISOSpeedRatings' in result
        assert 'rdf:Seq' in result
        assert '400' in result

    def test_date_mapping(self):
        """Mappe DateTimeOriginal vers xmp:CreateDate."""
        result = _convert_exif_to_xmp('DateTimeOriginal', '2024:03:15 14:30:00')

        assert 'xmp:CreateDate' in result
        assert '2024-03-15T14:30:00' in result

    def test_gps_mapping(self):
        """Mappe les coordonnées GPS."""
        lat = _convert_exif_to_xmp('GPSLatitude', 48.8584)
        lat_ref = _convert_exif_to_xmp('GPSLatitudeRef', 'N')

        assert 'exif:GPSLatitude' in lat
        assert '48.8584' in lat
        assert 'exif:GPSLatitudeRef' in lat_ref
        assert 'N' in lat_ref

    def test_description_uses_alt(self):
        """ImageDescription utilise rdf:Alt pour le multilingue."""
        result = _convert_exif_to_xmp('ImageDescription', 'Ma photo')

        assert 'dc:description' in result
        assert 'rdf:Alt' in result
        assert 'x-default' in result

    def test_unknown_tag_returns_none(self):
        """Les tags inconnus retournent None."""
        result = _convert_exif_to_xmp('UnknownTag', 'value')

        assert result is None


class TestFormatRational:
    """Tests pour la fonction _format_rational."""

    def test_integer_value(self):
        """Formate un entier comme chaîne."""
        assert _format_rational(50) == '50'
        assert _format_rational(100.0) == '100'

    def test_fraction_value(self):
        """Formate une fraction correctement."""
        result = _format_rational(0.008)  # 1/125
        assert '1/125' in result

    def test_decimal_passthrough(self):
        """Retourne les décimaux non-fractions tels quels."""
        result = _format_rational(2.8)
        assert '2.8' in result


class TestFormatXmpDate:
    """Tests pour la fonction _format_xmp_date."""

    def test_exif_to_xmp_format(self):
        """Convertit le format EXIF en ISO."""
        result = _format_xmp_date('2024:03:15 14:30:00')

        assert result == '2024-03-15T14:30:00'

    def test_iso_passthrough(self):
        """Laisse passer les dates déjà au format ISO."""
        result = _format_xmp_date('2024-03-15T14:30:00')

        assert result == '2024-03-15T14:30:00'

    def test_date_only(self):
        """Gère les dates sans heure."""
        result = _format_xmp_date('2024-03-15')

        assert '2024-03-15' in result