"""Summarization and easy English services."""
from __future__ import annotations

from typing import Tuple

from src.config import SUMMARY_SYSTEM_PROMPT, EASY_ENGLISH_SYSTEM_PROMPT
from src.model_loader import get_model_and_tokenizer
from src.generation import chat_generate


def summarize(text: str) -> Tuple[str, str]:
    """Summarize Japanese text in English. Returns (summary, status)."""
    if not text or not text.strip():
        return "", ""

    model, tokenizer = get_model_and_tokenizer()
    messages = [
        {"role": "system", "content": SUMMARY_SYSTEM_PROMPT},
        {"role": "user", "content": text.strip()},
    ]
    summary = chat_generate(model, tokenizer, messages, max_new_tokens=512, do_sample=False)
    return summary, ""


def easy_english(text: str) -> Tuple[str, str]:
    """Rewrite English text into simple English. Returns (easy_text, status)."""
    if not text or not text.strip():
        return "", ""

    model, tokenizer = get_model_and_tokenizer()
    messages = [
        {"role": "system", "content": EASY_ENGLISH_SYSTEM_PROMPT},
        {"role": "user", "content": text.strip()},
    ]
    easy = chat_generate(model, tokenizer, messages, max_new_tokens=512, do_sample=False)
    return easy, ""