"""Portable full-source identities; no embedded PARSEC/MIST numerical rows."""
from pathlib import Path
import hashlib,json,io
import numpy as np
HERE=Path(__file__).resolve().parent
RECIPES=json.loads((HERE/'source-recipes.json').read_text())

def numeric_digest(columns,rows):
    values=np.asarray(rows,dtype='<f8').copy();values[values==0]=0
    header=('cluster-numeric-v1\n'+'\t'.join(columns)+f'\n{len(rows)}\t{len(columns)}\n').encode('ascii')
    return hashlib.sha256(header+values.tobytes()).hexdigest()

def original_model(path,source):
    text=Path(path).read_text()
    required=['PARSEC release v1.2S','# Using OBC version','# Photometric system: Gaia EDR3'] if source=='parsec' else ['# MIST version number  = 1.2','# MESA revision number =     7503','Gaia_G_EDR3']
    if not all(token in text for token in required):raise ValueError('Source version/BC/passbands changed')
    start='# Zini' if source=='parsec' else '# EEP '
    columns=next(line[1:].split() for line in text.splitlines() if line.startswith(start))
    rows=np.loadtxt(io.StringIO(text))
    if not np.isfinite(rows).all():raise ValueError('Nonfinite source row')
    return columns,rows

def verify_inputs(directory):
    directory=Path(directory);receipts=[]
    for source in RECIPES['direct']:
        path=directory/source['name'];body=path.read_bytes();sha=hashlib.sha256(body).hexdigest()
        if sha!=source['sha256'] or len(body)!=source['bytes']:raise ValueError('Fixed direct source body changed: '+source['name'])
        receipts.append({'name':source['name'],'bytes':len(body),'sha256':sha})
    for model in RECIPES['trustedModelsets']:
        source=model['sourceId'].split('-')[0]
        for table in model['tables']:
            name=f"parsec-dense-av{table['Av']:.1f}.dat" if source=='parsec' else RECIPES['mistPhotometryName']
            path=directory/name;columns,rows=original_model(path,source);digest=numeric_digest(columns,rows)
            if columns!=table['columns'] or len(rows)!=table['rows'] or digest!=table['numericSha256']:raise ValueError('Fixed original model numerical identity changed: '+name)
            receipts.append({'name':name,'bytes':path.stat().st_size,'sha256':hashlib.sha256(path.read_bytes()).hexdigest(),'numericSha256':digest})
    return receipts