#!/usr/bin/env python3
"""Verify original records against the release manifest; no model inference."""
import argparse,hashlib,json
from pathlib import Path

def digest(path):
    h=hashlib.sha256()
    with path.open('rb') as f:
        for b in iter(lambda:f.read(1024*1024),b''):h.update(b)
    return h.hexdigest()

def main():
    ap=argparse.ArgumentParser();ap.add_argument('--root',type=Path,default=Path(__file__).resolve().parent);args=ap.parse_args()
    root=args.root.resolve();manifest=json.loads((root/'MANIFEST.json').read_text());failures=[];total=0
    for row in manifest['files']:
        p=root/row['path']
        if not p.resolve().is_relative_to(root):failures.append({'path':row['path'],'error':'unsafe path'});continue
        if not p.is_file():failures.append({'path':row['path'],'error':'missing'});continue
        total+=p.stat().st_size
        if p.stat().st_size!=row['bytes'] or digest(p)!=row['sha256']:failures.append({'path':row['path'],'error':'size or SHA-256 mismatch'})
    report={'release_id':manifest['release_id'],'checked_files':len(manifest['files']),'bytes':total,'status':'passed' if not failures else 'failed','failures':failures}
    print(json.dumps(report,indent=2))
    raise SystemExit(bool(failures))
if __name__=='__main__':main()