"""Export validated public traces to a JSONL file."""

from __future__ import annotations

import argparse
import json
import sys
from pathlib import Path

PROJECT_ROOT = Path(__file__).resolve().parents[1]
if str(PROJECT_ROOT) not in sys.path:
    sys.path.insert(0, str(PROJECT_ROOT))

from src.models.schema import TraceRecord


DEFAULT_INPUT_DIR = Path("data/traces/samples")
DEFAULT_OUTPUT_PATH = Path("data/traces/samples/objectverse_public_mock_traces.jsonl")


def collect_traces(input_dir: Path = DEFAULT_INPUT_DIR) -> list[TraceRecord]:
    paths = sorted(input_dir.glob("*.json"))
    if not paths:
        raise FileNotFoundError(f"No trace JSON files found under {input_dir}")

    traces: list[TraceRecord] = []
    for path in paths:
        payload = json.loads(path.read_text(encoding="utf-8"))
        traces.append(TraceRecord.model_validate(payload))
    return traces


def export_trace_jsonl(
    input_dir: Path = DEFAULT_INPUT_DIR,
    output_path: Path = DEFAULT_OUTPUT_PATH,
) -> int:
    traces = collect_traces(input_dir)
    output_path.parent.mkdir(parents=True, exist_ok=True)
    lines = [
        json.dumps(trace.model_dump(mode="json"), ensure_ascii=False, sort_keys=True)
        for trace in traces
    ]
    output_path.write_text("\n".join(lines) + "\n", encoding="utf-8")
    return len(traces)


def _parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--input-dir", type=Path, default=DEFAULT_INPUT_DIR)
    parser.add_argument("--output", type=Path, default=DEFAULT_OUTPUT_PATH)
    return parser.parse_args()


def main() -> None:
    args = _parse_args()
    count = export_trace_jsonl(args.input_dir, args.output)
    print(f"exported {count} traces to {args.output}")


if __name__ == "__main__":
    main()