"""Offline integrity, HF loading and lossless round-trip validation; no inference."""
from pathlib import Path
import hashlib, json, os, sys
os.environ.setdefault('HF_HUB_OFFLINE','1')
os.environ.setdefault('HF_DATASETS_OFFLINE','1')
from datasets import load_dataset, get_dataset_config_names, Image
from io_utils import decode_record

def main():
    root=Path(__file__).resolve().parents[1]
    manifest=json.loads((root/'MANIFEST.json').read_text())
    for name,expected in manifest['files'].items():
        p=root/name
        assert p.stat().st_size==expected['bytes'],name
        with p.open('rb') as f:assert hashlib.file_digest(f,'sha256').hexdigest()==expected['sha256'],name
    info=json.loads((root/'dataset_info.json').read_text())
    configs=get_dataset_config_names(str(root))
    assert set(configs)==set(info['collections'])
    allids=set();originals=set();counts={}
    for config in configs:
        folder=root/'raw'/config
        raw=[json.loads(l) for l in (folder/'data.jsonl').read_text().splitlines() if l.strip()]
        ds=load_dataset(str(root),config,split='test')
        assert len(ds)==len(raw)==info['collections'][config]['candidates']
        image='clean_image' in ds.column_names
        if image:
            first=ds[0]
            for side in ('clean','adv'):
                im=first[side+'_image'];im.load();assert im.width>0 and im.height>0
                ds=ds.cast_column(side+'_image',Image(decode=False))
        for item,expected in zip(ds,raw):
            assert decode_record(item)==expected,(config,expected['id'])
            assert expected['id'] not in allids
            allids.add(expected['id']);originals.add(expected['original_id'])
            for qid in expected['task']['question_ids']:
                assert qid in expected['clean']['questions'] and qid in expected['adv']['questions']
            if image:
                for side in ('clean','adv'):
                    assert item[side+'_image']['bytes']==(folder/expected[side]['images'][0]).read_bytes(),(config,expected['id'],side)
        counts[config]=len(ds)
    assert len(allids)==info['candidates'] and len(originals)==info['original_questions']
    print(json.dumps({'status':'passed','configs':counts,'candidates':len(allids),'original_questions':len(originals),'checksummed_files':len(manifest['files']),'all_rows_lossless':True,'all_image_bytes_match':True,'pil_decoding_per_image_config':True},indent=2))

if __name__=='__main__':main()