"""General utility helpers for file operations and logging."""

from __future__ import annotations

import logging
from pathlib import Path

from .constants import APP_NAME, LOG_FILE_NAME


def setup_logger(gradle_home: Path) -> logging.Logger:
    """Configure and return the application logger.

    Logs are written to ``<gradle_home>/gradle-mirror.log`` and include timestamps.
    """

    gradle_home.mkdir(parents=True, exist_ok=True)
    log_path = gradle_home / LOG_FILE_NAME

    logger = logging.getLogger(APP_NAME)
    if logger.handlers:
        return logger

    logger.setLevel(logging.INFO)
    formatter = logging.Formatter(
        fmt="%(asctime)s | %(levelname)s | %(name)s | %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
    )

    file_handler = logging.FileHandler(log_path, encoding="utf-8")
    file_handler.setFormatter(formatter)

    logger.addHandler(file_handler)
    logger.propagate = False
    return logger


def read_text_if_exists(path: Path) -> str:
    """Read UTF-8 text if file exists; otherwise return empty string."""

    if not path.exists():
        return ""
    return path.read_text(encoding="utf-8")


def write_text(path: Path, content: str) -> None:
    """Write UTF-8 text content, creating parent folders if needed."""

    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(content, encoding="utf-8")