"""Promote one rendered camera variant; preserve the previous landing image."""
import json
import shutil
import sys
from pathlib import Path

root = Path(__file__).resolve().parents[1]
assets = root / '랜딩페이지/assets'
variant = sys.argv[1] if len(sys.argv) > 1 else 'horizontal-smooth'
if variant not in ('balanced', 'low', 'high', 'trim30', 'trim20', 'refined', 'horizontal-smooth'):
    raise SystemExit('Unknown camera variant')
source = root / ('.verify/landing-horizontal-20261109' if variant == 'horizontal-smooth' else '.verify/landing-hero-20261109')
metadata = json.loads((source / f'{variant}.json').read_text())
if variant == 'horizontal-smooth':
    assert metadata['along'] == 0 and metadata['outline']['addedOutsideSourcePixels'] == 0
    assert metadata['piers'] == 6 and metadata['abutments'] == 2
    # Full curve control points remain in the capture audit, outside the service bundle.
    metadata['outline'].pop('path')
backup = source / ('before-horizontal' if variant == 'horizontal-smooth' else 'before-refined' if variant == 'refined' else 'before-trim30')
backup.mkdir(exist_ok=True)
for name in ('okseong-model-hero.png', 'okseong-model-hero.webp', 'okseong-hero-capture.ts'):
    if (assets / name).exists() and not (backup / name).exists():
        shutil.copyfile(assets / name, backup / name)
for kind in ('png', 'webp'):
    shutil.copyfile(source / f'{variant}.{kind}', assets / f'okseong-model-hero.{kind}')
metadata['terrainFlow'] = [None if p is None else {'x': p['x'], 'y': p['y']} for p in metadata['terrainFlow']]
(assets / 'okseong-hero-capture.ts').write_text(
    '// Generated by scripts/promote-landing-hero.py from actual model projection.\n'
    'export const heroCapture = ' + json.dumps(metadata, ensure_ascii=False, indent=2) + ' as const;\n'
)