app/logger.py

import logging
import os
from logging.handlers import RotatingFileHandler

LOG_DIR = "./logs"

def get_logger(name: str) -> logging.Logger:
    os.makedirs(LOG_DIR, exist_ok=True)

    logger = logging.getLogger(name)

    if logger.handlers:
        return logger

    logger.setLevel(logging.DEBUG)

    # Dosya handler — 5MB, max 3 dosya
    file_handler = RotatingFileHandler(
        os.path.join(LOG_DIR, f"{name}.log"),
        maxBytes=5 * 1024 * 1024,
        backupCount=3,
        encoding="utf-8"
    )
    file_handler.setLevel(logging.DEBUG)
    file_fmt = logging.Formatter("%(asctime)s | %(levelname)-8s | %(message)s", datefmt="%Y-%m-%d %H:%M:%S")
    file_handler.setFormatter(file_fmt)

    # Console handler
    console_handler = logging.StreamHandler()
    console_handler.setLevel(logging.INFO)
    console_fmt = logging.Formatter("%(levelname)-8s | %(message)s")
    console_handler.setFormatter(console_fmt)

    logger.addHandler(file_handler)
    logger.addHandler(console_handler)

    return logger


def get_jsonl_logger(name: str) -> logging.Logger:
    """Returns a logger that writes raw JSON lines (no prefix) to logs/{name}.jsonl.
    Intended for machine-readable per-query traces."""
    os.makedirs(LOG_DIR, exist_ok=True)

    logger = logging.getLogger(f"jsonl.{name}")

    if logger.handlers:
        return logger

    logger.setLevel(logging.INFO)
    logger.propagate = False  # do not bubble up to root

    file_handler = RotatingFileHandler(
        os.path.join(LOG_DIR, f"{name}.jsonl"),
        maxBytes=5 * 1024 * 1024,
        backupCount=3,
        encoding="utf-8"
    )
    file_handler.setLevel(logging.INFO)
    file_handler.setFormatter(logging.Formatter("%(message)s"))
    logger.addHandler(file_handler)

    return logger