import logging
import os
import sys
import uuid
from datetime import datetime
from logging.handlers import RotatingFileHandler
from pathlib import Path

LOG_DIR = Path(__file__).resolve().parent.parent / "logs"
LOG_DIR.mkdir(exist_ok=True)

LOG_FORMAT = logging.Formatter(
    "[%(asctime)s] [%(levelname)s] [%(name)s] %(message)s",
    datefmt="%Y-%m-%d %H:%M:%S",
)

MAX_LOG_FILES = 20

_root_handler: RotatingFileHandler | None = None
_console_handler: logging.StreamHandler | None = None


def _init_handlers():
    global _root_handler, _console_handler
    if _root_handler:
        return

    ts = datetime.now().strftime("%Y%m%d_%H%M%S")
    uid = uuid.uuid4().hex[:6]
    log_file = LOG_DIR / f"turbosu_{ts}_{uid}.log"

    _root_handler = RotatingFileHandler(
        log_file, maxBytes=10 * 1024 * 1024, backupCount=20, encoding="utf-8"
    )
    _root_handler.setLevel(logging.DEBUG)
    _root_handler.setFormatter(LOG_FORMAT)

    _console_handler = logging.StreamHandler(sys.stdout)
    _console_handler.setLevel(logging.INFO)
    _console_handler.setFormatter(LOG_FORMAT)

    logs = sorted(LOG_DIR.glob("turbosu_*.log*"), key=lambda p: p.stat().st_mtime)
    while len(logs) > MAX_LOG_FILES:
        oldest = logs.pop(0)
        try:
            oldest.unlink()
        except OSError:
            pass


def setup_logger(name: str, level: int = logging.DEBUG) -> logging.Logger:
    _init_handlers()

    logger = logging.getLogger(name)
    logger.setLevel(level)
    logger.propagate = False

    if not logger.handlers:
        logger.addHandler(_root_handler)
        logger.addHandler(_console_handler)

    return logger


def get_logger(name: str) -> logging.Logger:
    return setup_logger(name)