# -*- coding: utf-8 -*-
"""Baseline eval for PoetryMTEB/ClassicalChinesePoetryThemeClassification."""
from __future__ import annotations

import argparse
import json
from collections import Counter
from pathlib import Path

from datasets import load_dataset
from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn.linear_model import LogisticRegression
from sklearn.metrics import accuracy_score, classification_report, f1_score
from sklearn.pipeline import Pipeline


def main() -> None:
    p = argparse.ArgumentParser()
    p.add_argument("--repo", default="PoetryMTEB/ClassicalChinesePoetryThemeClassification")
    p.add_argument("--seed", type=int, default=42)
    p.add_argument("--out-json", default="")
    args = p.parse_args()
    ds = load_dataset(args.repo)
    train, test = ds["train"], ds["test"]
    clf = Pipeline(
        [
            ("tfidf", TfidfVectorizer(analyzer="char", ngram_range=(1, 3), max_features=50000)),
            (
                "lr",
                LogisticRegression(
                    max_iter=2000, random_state=args.seed, multi_class="multinomial"
                ),
            ),
        ]
    )
    clf.fit(list(train["poem"]), list(train["label"]))
    pred = clf.predict(list(test["poem"]))
    y_test = list(test["label"])
    id2name = {int(a): b for a, b in zip(train["label"], train["label_name"])}
    target_names = [id2name[i] for i in sorted(id2name)]
    metrics = {
        "accuracy": float(accuracy_score(y_test, pred)),
        "macro_f1": float(f1_score(y_test, pred, average="macro")),
        "micro_f1": float(f1_score(y_test, pred, average="micro")),
        "n_train": len(train),
        "n_test": len(test),
        "label_counts_test": dict(Counter(int(x) for x in y_test)),
        "report": classification_report(
            y_test, pred, target_names=target_names, digits=4
        ),
    }
    print(json.dumps({k: v for k, v in metrics.items() if k != "report"}, indent=2))
    print(metrics["report"])
    if args.out_json:
        Path(args.out_json).write_text(
            json.dumps(metrics, ensure_ascii=False, indent=2), encoding="utf-8"
        )


if __name__ == "__main__":
    main()