"""
Minimal constants required by ACE-Step 1.5 phase-1 constrained metadata processor.
Vendored locally to avoid runtime dependency on external ACE-Step-1.5 repo folder.
"""

VALID_LANGUAGES = [
    'ar', 'az', 'bg', 'bn', 'ca', 'cs', 'da', 'de', 'el', 'en',
    'es', 'fa', 'fi', 'fr', 'he', 'hi', 'hr', 'ht', 'hu', 'id',
    'is', 'it', 'ja', 'ko', 'la', 'lt', 'ms', 'ne', 'nl', 'no',
    'pa', 'pl', 'pt', 'ro', 'ru', 'sa', 'sk', 'sr', 'sv', 'sw',
    'ta', 'te', 'th', 'tl', 'tr', 'uk', 'ur', 'vi', 'yue', 'zh',
    'unknown'
]

KEYSCALE_NOTES = ['A', 'B', 'C', 'D', 'E', 'F', 'G']
KEYSCALE_ACCIDENTALS = ['', '#', 'b', '\u266f', '\u266d']
KEYSCALE_MODES = ['major', 'minor']

VALID_KEYSCALES = set()
for note in KEYSCALE_NOTES:
    for acc in KEYSCALE_ACCIDENTALS:
        for mode in KEYSCALE_MODES:
            VALID_KEYSCALES.add(f"{note}{acc} {mode}")

BPM_MIN = 30
BPM_MAX = 300
DURATION_MIN = 10
DURATION_MAX = 600
VALID_TIME_SIGNATURES = [2, 3, 4, 6]