import argparse
import json
from pathlib import Path
from typing import Dict, List


def infer_mode(summary: Dict[str, object]) -> str:
    reasoning_mode = summary.get("guide_reasoning_mode", "none")
    question_weight = float(summary.get("guide_question_attention_weight", 1.0))
    answer_weight = float(summary.get("guide_answer_attention_weight", 1.0))

    if reasoning_mode != "two_pass_explicit":
        if question_weight == 1.0 and answer_weight == 1.0:
            return "baseline"
        if question_weight > 0 and answer_weight == 0.0:
            return "question_only"
        if question_weight == 0.0 and answer_weight > 0:
            return "answer_only"
        return f"combined_{question_weight:g}_{answer_weight:g}"

    attention_source = summary.get("guide_attention_source", "default")
    reasoning_weight = float(summary.get("guide_reasoning_attention_weight", 0.0))
    if attention_source == "reasoning":
        return "question_only"
    if attention_source == "answer":
        return "answer_only"
    if attention_source == "combined":
        if reasoning_weight == 1.0 and answer_weight == 1.0:
            return "combined"
        return f"combined_{reasoning_weight:g}_{answer_weight:g}"
    return f"custom_{attention_source}"


def load_summaries(input_dir: Path, pattern: str) -> List[Dict[str, object]]:
    rows = []
    for path in sorted(input_dir.rglob(pattern)):
        with path.open() as f:
            summary = json.load(f)
        row = {
            "summary_path": str(path),
            "run_name": path.name.replace(".summary.json", ""),
            "count": int(summary.get("count", 0)),
            "accuracy": float(summary["accuracy"]),
            "prune_ratio": float(summary.get("large_model_prune_ratio", -1)),
            "prune_layer": float(summary.get("large_model_prune_layer", 0.0)),
            "reasoning_mode": summary.get("guide_reasoning_mode", "none"),
            "attention_source": summary.get("guide_attention_source", "default"),
            "question_weight": float(summary.get("guide_question_attention_weight", 1.0)),
            "reasoning_weight": float(summary.get("guide_reasoning_attention_weight", 0.0)),
            "answer_weight": float(summary.get("guide_answer_attention_weight", 0.0)),
            "results_file": summary.get("results_file", ""),
        }
        row["mode"] = infer_mode(summary)
        rows.append(row)
    return rows


def add_baseline_deltas(rows: List[Dict[str, object]]) -> None:
    baseline_by_ratio = {}
    for row in rows:
        if row["mode"] == "baseline":
            baseline_by_ratio[row["prune_ratio"]] = row["accuracy"]

    for row in rows:
        baseline_accuracy = baseline_by_ratio.get(row["prune_ratio"])
        row["baseline_accuracy"] = baseline_accuracy
        row["delta_vs_baseline"] = None if baseline_accuracy is None else row["accuracy"] - baseline_accuracy


def print_table(rows: List[Dict[str, object]]) -> None:
    headers = [
        "prune_ratio",
        "mode",
        "accuracy",
        "delta_vs_baseline",
        "reasoning_mode",
        "attention_source",
        "weights(q,a)",
        "count",
        "run_name",
    ]
    print(" | ".join(headers))
    print(" | ".join(["---"] * len(headers)))
    for row in rows:
        delta = row["delta_vs_baseline"]
        delta_text = "n/a" if delta is None else f"{delta:+.6f}"
        weights = f"{row['question_weight']:.3f},{row['answer_weight']:.3f}"
        print(
            " | ".join(
                [
                    f"{row['prune_ratio']:.3f}",
                    row["mode"],
                    f"{row['accuracy']:.6f}",
                    delta_text,
                    row["reasoning_mode"],
                    row["attention_source"],
                    weights,
                    str(row["count"]),
                    row["run_name"],
                ]
            )
        )


def main() -> None:
    parser = argparse.ArgumentParser()
    parser.add_argument("--input-dir", type=Path, required=True)
    parser.add_argument("--pattern", type=str, default="*.summary.json")
    parser.add_argument("--output-json", type=Path, default=None)
    args = parser.parse_args()

    rows = load_summaries(args.input_dir, args.pattern)
    if not rows:
        raise SystemExit(f"No summary files found under {args.input_dir} matching {args.pattern}")

    rows.sort(key=lambda item: (item["prune_ratio"], item["mode"], item["run_name"]))
    add_baseline_deltas(rows)
    print_table(rows)

    if args.output_json is not None:
        args.output_json.parent.mkdir(parents=True, exist_ok=True)
        with args.output_json.open("w") as f:
            json.dump(rows, f, ensure_ascii=False, indent=2)


if __name__ == "__main__":
    main()