import logging
import os
import tempfile
import sys

# Determine log level from environment variable `LOG_LEVEL` (e.g. DEBUG, INFO)
raw_level = os.getenv("LOG_LEVEL", "INFO").upper()
level = logging.INFO
if raw_level.isdigit():
	try:
		level = int(raw_level)
	except Exception:
		level = logging.INFO
else:
	level = getattr(logging, raw_level, logging.INFO)

logging.basicConfig(level=level, format='[%(levelname)s] %(asctime)s: %(name)s: %(message)s')
LOGGER = logging.getLogger('botmafieux')
LOGGER.setLevel(level)

# Decide log file path: prefer LOG_FILE, then CONFIG_PATH/botmafieux.log, then /tmp
preferred = os.getenv('LOG_FILE')
if not preferred:
	cfg_path = "/logs"
	if cfg_path:
		preferred = os.path.join(cfg_path, 'botmafieux.log')
	else:
		preferred = os.path.join(tempfile.gettempdir(), 'botmafieux.log')

formatter = logging.Formatter('%(asctime)s:%(levelname)s:%(name)s: %(message)s')

try:
	handler = logging.FileHandler(filename=preferred, encoding='utf-8', mode='a')
	handler.setFormatter(formatter)
	LOGGER.addHandler(handler)
except (PermissionError, OSError) as e:
	# Fall back to console logging if file cannot be opened
	stream_handler = logging.StreamHandler(sys.stdout)
	stream_handler.setFormatter(formatter)
	LOGGER.addHandler(stream_handler)
	# Print a warning directly to stderr in case logging isn't yet configured elsewhere
	print(f"[WARN] Could not open log file '{preferred}' for writing: {e}. Falling back to stdout.", file=sys.stderr)