import json
import os
from typing import List

QUEUE_FILE = "translation_queue.json"


def load_queue() -> List[str]:
    if not os.path.exists(QUEUE_FILE):
        return []
    try:
        with open(QUEUE_FILE, "r", encoding="utf-8") as f:
            data = json.load(f)
            return data.get("queue", [])
    except Exception:
        return []


def save_queue(queue: List[str]):
    with open(QUEUE_FILE, "w", encoding="utf-8") as f:
        json.dump({"queue": queue}, f, ensure_ascii=False, indent=2)


def add_to_queue(filename: str):
    queue = load_queue()
    if filename not in queue:
        queue.append(filename)
        save_queue(queue)


def remove_from_queue(filename: str):
    queue = load_queue()
    if filename in queue:
        queue.remove(filename)
        save_queue(queue)


def translate_from_queue(start_translation_func):
    from utils import notify_telegram
    import threading
    import time

    queue = load_queue()
    if not queue:
        print("[QUEUE] Черга пуста")
        return

    filename = queue[0]
    try:
        print(f"[QUEUE] Спроба перекладу з черги: {filename}")
        start_translation_func(filename)
        remove_from_queue(filename)
        notify_telegram(f"[✅] Файл з черги перекладено: {filename}")

        if load_queue():
            threading.Timer(3, translate_from_queue, args=(start_translation_func,)).start()

    except Exception as e:
        error_text = str(e).lower()
        if (
            "too many requests" in error_text
            or "you are allowed to make" in error_text
            or "5 requests per second" in error_text
        ):
            notify_telegram(
                f"[🛑] Знову ліміт при перекладі з черги. Повтор через 30 хвилин.\nФайл: {filename}"
            )
            threading.Timer(1800, translate_from_queue, args=(start_translation_func,)).start()
        else:
            notify_telegram(f"[⚠️] Помилка при перекладі з черги: {filename}\n{str(e)}")
            remove_from_queue(filename)