"""Validate manifest coverage, labels, folds, HDF5 schema, and file checksums."""
import csv
import hashlib
from collections import Counter
from pathlib import Path

import h5py


def main():
    root = Path(__file__).resolve().parents[1]
    with (root / 'manifest.csv').open(newline='') as f:
        rows = list(csv.DictReader(f))
    paths = [r['path'] for r in rows]
    assert len(rows) == 38180 and len(set(paths)) == len(rows)
    assert len({r['sample_id'] for r in rows}) == len(rows)
    assert set(paths) == {str(p.relative_to(root)) for p in (root / 'data').rglob('*.h5')}
    counts = Counter()
    for row in rows:
        path = Path(row['path'])
        assert not path.is_absolute() and '..' not in path.parts
        assert row['label'] == {'negative': '0', 'positive': '1'}[row['label_name']]
        assert row['label_name'] in path.name
        counts[row['source'], row['split'], row['fold'], row['label_name']] += 1
        filename = root / path
        assert hashlib.sha256(filename.read_bytes()).hexdigest() == row['sha256'], path
        with h5py.File(filename) as f:
            d = f[row['h5_key']]
            assert d.shape == tuple(int(row[k]) for k in ('height', 'width', 'bins')), path
            assert str(d.dtype) == row['dtype'], path
    assert Counter(r['split'] for r in rows) == {
        'train': 26600, 'validation': 5700, 'test': 5700, 'unassigned': 180}
    for i in range(1, 10):
        for label in ('negative', 'positive'):
            assert counts['experimental', 'unassigned', f'fold_{i}', label] == 10
    for split in ('train', 'validation', 'test'):
        with (root / f'metadata/synthetic_{split}.csv').open(newline='') as f:
            assert list(csv.DictReader(f)) == [r for r in rows if r['split'] == split]
    expected = [r for r in rows if r['source'] == 'experimental']
    for name in ('metadata/experimental.csv', 'data/experiment_data/manifest.csv'):
        with (root / name).open(newline='') as f:
            assert list(csv.DictReader(f)) == expected
    assert (root / 'SHA256SUMS').read_text() == ''.join(
        f"{r['sha256']}  {r['path']}\n" for r in rows)
    print('PASS: 38,180 files, hashes, schemas, portable paths, split manifests, and nine balanced folds')


if __name__ == '__main__':
    main()