import argparse
import json
import sys
from datetime import datetime
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent.parent))

from server.eval.precision import run_batch_precision_eval_multi_k
from server.utils import load_config


def main():
    config = load_config()
    default_path = config.get("eval", {}).get("ground_truth_path", "data/ground_truth/eval_pairs.json")
    eval_config = config.get("eval", {})
    default_ks = eval_config.get("precision_ks")
    if default_ks is None:
        default_ks = [eval_config.get("precision_k", 5)]

    parser = argparse.ArgumentParser(description="Run batch Precision@K evaluation")
    parser.add_argument("--queries", type=str, default=default_path, help="Path to eval_pairs.json")
    parser.add_argument("--ks", type=int, nargs="+", default=default_ks, help="K values for Precision@K")
    args = parser.parse_args()

    print(f"Running Precision eval for K={args.ks} on queries from {args.queries}...")
    results = run_batch_precision_eval_multi_k(args.queries, ks=args.ks)

    for k in args.ks:
        metric_key = f"precision@{k}"
        metric_results = results[metric_key]
        print(f"\nMean Precision@{k}: {metric_results['mean_precision_at_k']}")
        print("\nPer-query breakdown:")
        for r in metric_results["per_query_results"]:
            print(f"  P@{k}={r['precision_at_k']:.2f} | {r['query'][:70]}")

    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    output_path = f"eval_results_{timestamp}.json"
    with open(output_path, "w") as f:
        json.dump(results, f, indent=2)
    print(f"\nResults saved to: {output_path}")


if __name__ == "__main__":
    main()