import os

def try_parse(type, value: str):
    try:
        return type(value)
    except Exception:
        return None

# MQTT config
MQTT_BROKER_HOST = os.environ.get("MQTT_BROKER_HOST") or "mqtt"
MQTT_BROKER_PORT = try_parse(int, os.environ.get("MQTT_BROKER_PORT")) or 1883
MQTT_TOPIC = os.environ.get("MQTT_TOPIC") or "agent"

# Data-related config
USER_ID = try_parse(int, os.environ.get("USER_ID")) or 1
DELAY = try_parse(float, os.environ.get("DELAY")) or 1
GPS_SOURCE = os.environ.get("GPS_SOURCE") or "data/gps.csv"
