import os
import logging
from functools import lru_cache

import boto3
from botocore.config import Config

from config import ACCESS_KEY, SECRET_KEY, BUCKET_NAME

logger = logging.getLogger("s3_client")

ENDPOINT_URL = "https://storage.yandexcloud.net"


@lru_cache(maxsize=1)
def _build_s3_client():
    return boto3.client(
        "s3",
        endpoint_url=ENDPOINT_URL,
        aws_access_key_id=ACCESS_KEY,
        aws_secret_access_key=SECRET_KEY,
        config=Config(
            connect_timeout=30,
            read_timeout=300,
            retries={"max_attempts": 3},
        ),
    )


def upload_file(file_path: str) -> str | None:
    key_name = os.path.basename(file_path)
    try:
        client = _build_s3_client()
        client.upload_file(file_path, BUCKET_NAME, key_name)
        file_url = f"{ENDPOINT_URL}/{BUCKET_NAME}/{key_name}"
        logger.info("Файл загружен в S3: %s", file_url)
        return file_url
    except Exception as exc:
        logger.exception("Ошибка загрузки в S3: %s", exc)
        return None