#!/usr/bin/env python3
"""Build and validate the object-level dataset manifest."""

from __future__ import annotations

import json
from pathlib import Path


ROOT = Path(__file__).resolve().parents[1]
MANIFEST = ROOT / "dataset_manifest.jsonl"


def main() -> None:
    records = []

    for category_dir in sorted(path for path in ROOT.iterdir() if path.is_dir()):
        if category_dir.name.startswith(".") or category_dir.name == "scripts":
            continue

        for object_dir in sorted(path for path in category_dir.iterdir() if path.is_dir()):
            trajectory_root = object_dir / "hoi_trajectories"
            if not trajectory_root.is_dir():
                raise RuntimeError(f"Missing trajectory directory: {trajectory_root}")

            handles = sorted(
                path.name
                for path in trajectory_root.iterdir()
                if path.is_dir() and (path / "trajectory.json").is_file()
            )
            if not handles:
                raise RuntimeError(f"No trajectories found: {trajectory_root}")

            records.append(
                {
                    "category": category_dir.name,
                    "object_id": object_dir.name,
                    "trajectory_count": len(handles),
                    "trajectory_handles": handles,
                    "trajectory_root": str(trajectory_root.relative_to(ROOT)),
                }
            )

    with MANIFEST.open("w", encoding="utf-8") as output:
        for record in records:
            output.write(json.dumps(record, sort_keys=True) + "\n")

    print(f"Wrote {len(records)} records to {MANIFEST}")


if __name__ == "__main__":
    main()