# SPDX-License-Identifier: Apache-2.0
# /// script
# requires-python = ">=3.11"
# dependencies = ["jsonschema"]
# ///
"""Check every row of metadata.jsonl, filling in each file's size and SHA-256.

    uv run tools/validate.py

Run from the dataset root before an upload. A row whose folder is here is checked
against its files; one whose folder was not downloaded, against the schema only.
Exits non-zero, naming the rows that fail.
"""

import hashlib
import json
import sys
from pathlib import Path

from jsonschema import Draft202012Validator

META = Path("metadata.jsonl")
schema = Draft202012Validator(json.loads(Path("schema.json").read_text()))
rows = [json.loads(line) for line in META.read_text().splitlines() if line.strip()]
errors = []
local = 0
for row in rows:
    asset = row.get("id", "?")
    model, preview = Path(row.get("file", "")), Path(row.get("file_name", ""))
    if model.parts[:1] != (asset,) or preview.parts[:1] != (asset,):
        errors.append(f"{asset}: file and file_name must sit in the folder {asset}/")
    if not Path(asset).is_dir():
        errors += [f"{asset}: {e.message}" for e in schema.iter_errors(row)]
        continue
    local += 1
    if model.is_file():
        with model.open("rb") as f:
            row["sha256"] = hashlib.file_digest(f, "sha256").hexdigest()
        row["size_bytes"] = model.stat().st_size
    else:
        errors.append(f"{asset}: no file {model}")
    if not preview.is_file():
        errors.append(f"{asset}: no preview {preview}; run tools/preview.py {asset}")
    errors += [f"{asset}: {e.message}" for e in schema.iter_errors(row)]
ids = [row.get("id") for row in rows]
errors += [f"{i}: id used twice" for i in sorted({i for i in ids if ids.count(i) > 1})]

META.write_text("".join(json.dumps(row) + "\n" for row in rows))
print(
    "\n".join(errors) or f"{len(rows)} rows valid, {local} checked against their files"
)
sys.exit(bool(errors))