from __future__ import annotations

import argparse
import json
import sys
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(ROOT / "src"))

from inferscale.validation import validate_cases  # noqa: E402


def main() -> None:
    parser = argparse.ArgumentParser(description="Validate InferScale predictions against external measured cases")
    parser.add_argument("input", type=Path, help="JSON file containing a list of validation cases")
    parser.add_argument("--output", type=Path, help="Optional JSON report path")
    args = parser.parse_args()

    payload = json.loads(args.input.read_text())
    cases = payload if isinstance(payload, list) else payload.get("cases", [])
    report = validate_cases(cases)
    text = json.dumps(report, indent=2)
    if args.output:
        args.output.write_text(text + "\n")
    print(text)


if __name__ == "__main__":
    main()