"""Copy original local Valve assets, validate WAV/MDL, record SHA256 provenance."""
import pathlib, shutil, struct, wave, hashlib, json
project = pathlib.Path(__file__).resolve().parents[1]
source = pathlib.Path.home()/'.steam/steam/steamapps/common/Half-Life/valve'
files = ['models/v_9mmar.mdl','models/w_9mmar.mdl','models/p_9mmar.mdl']
files += ['sound/weapons/'+n+'.wav' for n in ['hks1','hks2','hks3','dryfire1']]
files += ['sound/items/'+n+'.wav' for n in ['clipinsert1','cliprelease1','guncock1']]
files += ['sound/zombie/'+p.name for p in sorted((source/'sound/zombie').glob('*.wav'))]
files += ['sound/player/pl_metal%d.wav'%i for i in range(1,5)]
files += ['sound/debris/bustglass%d.wav'%i for i in range(1,4)]
manifest=[]
for relative in files:
    src=source/relative
    dst=project/'assets'/('weapons/'+src.name if relative.startswith('models/') else 'audio/'+relative.removeprefix('sound/'))
    dst.parent.mkdir(parents=True,exist_ok=True)
    shutil.copyfile(src,dst)
    row={'source':relative,'destination':str(dst.relative_to(project)),'sha256':hashlib.sha256(src.read_bytes()).hexdigest()}
    assert src.read_bytes()==dst.read_bytes()
    if src.suffix=='.wav':
        with wave.open(str(dst)) as w:
            assert w.getcomptype()=='NONE'
            row.update(channels=w.getnchannels(),bits=w.getsampwidth()*8,rate=w.getframerate(),duration=w.getnframes()/w.getframerate())
    else:
        d=dst.read_bytes(); assert d[:4]==b'IDST' and struct.unpack_from('<i',d,4)[0]==10
        row.update(textures=struct.unpack_from('<i',d,180)[0],sequence_groups=struct.unpack_from('<i',d,172)[0])
    manifest.append(row)
(project/'assets/half_life_manifest.json').write_text(json.dumps(manifest,indent=2)+'\n')
print('Validated and copied',len(manifest),'original assets; SHA256 manifest written.')