import argparse
import json
import re
from collections import defaultdict
from pathlib import Path


def read_jsonl(path):
    with Path(path).open(encoding="utf-8") as handle:
        return [json.loads(line) for line in handle if line.strip()]


def tokens(text):
    return re.findall(r"[a-z0-9çğıöşü]+", str(text).lower())


def token_f1(prediction, reference):
    pred = tokens(prediction)
    ref = tokens(reference)
    if not pred or not ref:
        return float(pred == ref)
    pred_counts = defaultdict(int)
    ref_counts = defaultdict(int)
    for token in pred:
        pred_counts[token] += 1
    for token in ref:
        ref_counts[token] += 1
    overlap = sum(min(count, ref_counts[token]) for token, count in pred_counts.items())
    if overlap == 0:
        return 0.0
    precision = overlap / len(pred)
    recall = overlap / len(ref)
    return 2 * precision * recall / (precision + recall)


def section(text, name, following):
    end = "|".join(re.escape(item) for item in following)
    pattern = rf"{re.escape(name)}\s*:\s*(.*?)(?=(?:{end})\s*:|$)"
    match = re.search(pattern, text, flags=re.IGNORECASE | re.DOTALL)
    return match.group(1).strip() if match else ""


def score_one(response, reference):
    rationale = section(response, "Gerekçe", ["Karar", "Öneriler"])
    decision = section(response, "Karar", ["Öneriler"])
    recommendations = section(response, "Öneriler", [])
    expected_recommendations = " ".join(reference["expected_recommendations"])
    format_score = sum(
        bool(re.search(rf"{heading}\s*:", response, re.IGNORECASE))
        for heading in ("Gerekçe", "Karar", "Öneriler")
    ) / 3
    return {
        "rationale_f1": token_f1(rationale, reference["reasoning_summary"]),
        "decision_f1": token_f1(decision, reference["expected_decision"]),
        "recommendations_f1": token_f1(recommendations, expected_recommendations),
        "format_score": format_score,
    }


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("--predictions", required=True)
    parser.add_argument("--reference", default="benchmark/reference.jsonl")
    parser.add_argument("--questions", default="benchmark/questions.jsonl")
    parser.add_argument("--output", required=True)
    args = parser.parse_args()

    predictions = {row["id"]: row for row in read_jsonl(args.predictions)}
    references = {row["id"]: row for row in read_jsonl(args.reference)}
    questions = {row["id"]: row for row in read_jsonl(args.questions)}
    details = []

    for uid, reference in references.items():
        prediction = predictions.get(uid, {})
        response = prediction.get("response", "")
        metrics = score_one(response, reference)
        total = 100 * (
            0.30 * metrics["rationale_f1"]
            + 0.40 * metrics["decision_f1"]
            + 0.20 * metrics["recommendations_f1"]
            + 0.10 * metrics["format_score"]
        )
        details.append({
            "id": uid,
            "category": questions[uid]["category"],
            "difficulty": questions[uid]["difficulty"],
            "manual": questions[uid]["manual"],
            "score": total,
            **metrics,
            "error": prediction.get("error") or ("missing_prediction" if uid not in predictions else None),
        })

    by_category = defaultdict(list)
    for row in details:
        by_category[row["category"]].append(row["score"])
    report = {
        "num_questions": len(details),
        "num_predictions": len(predictions),
        "overall_score": sum(row["score"] for row in details) / len(details),
        "manual_subset_score": sum(row["score"] for row in details if row["manual"]) / sum(row["manual"] for row in details),
        "category_scores": {
            key: sum(values) / len(values)
            for key, values in sorted(by_category.items())
        },
        "errors": sum(row["error"] is not None for row in details),
        "details": details,
    }
    output = Path(args.output)
    output.parent.mkdir(parents=True, exist_ok=True)
    output.write_text(json.dumps(report, ensure_ascii=False, indent=2), encoding="utf-8")
    print(json.dumps({key: value for key, value in report.items() if key != "details"}, ensure_ascii=False, indent=2))


if __name__ == "__main__":
    main()