import json
import os
from pathlib import Path
import tempfile
import unittest

from vwg_bench.metrics import summarize_vwg


def find_dataset_root() -> Path:
    if os.environ.get("VWG_DATASET_ROOT"):
        return Path(os.environ["VWG_DATASET_ROOT"])
    for parent in Path(__file__).resolve().parents:
        if (parent / "data" / "test" / "metadata.jsonl").exists():
            return parent
        sibling = parent / "huggingface" / "VWG-Bench"
        if (sibling / "data" / "test" / "metadata.jsonl").exists():
            return sibling
    raise FileNotFoundError(
        "Could not locate VWG-Bench. Set VWG_DATASET_ROOT or place the "
        "dataset at release/huggingface/VWG-Bench."
    )


DATASET_ROOT = find_dataset_root()


class MetricsTest(unittest.TestCase):
    def test_optional_metrics_are_not_zero_filled(self):
        rows = [
            {
                "id": 160,
                "seed": 0,
                "result_id": "160_seed0",
                "video_quality_score": 4,
                "progress_consistency_score": 3,
                "last_frame_goal_score": 5,
            }
        ]
        with tempfile.TemporaryDirectory() as directory:
            path = Path(directory) / "results.jsonl"
            path.write_text(
                "\n".join(json.dumps(row) for row in rows) + "\n",
                encoding="utf-8",
            )
            summary = summarize_vwg(DATASET_ROOT, path)
        overall = summary["overall"]
        self.assertEqual(overall["metrics"]["progress_goal_score"]["count"], 0)
        self.assertEqual(overall["sample_macro_average"], 4)


if __name__ == "__main__":
    unittest.main()