# core/config.py
import os
import sys
import yaml

DEFAULT_CONFIG = {
    "port": None,
    "baudrate": 115200,
    "timeout": 5.0
}

def load_config(cli_args=None):
    config = DEFAULT_CONFIG.copy()

    cwd_config = os.path.join(os.getcwd(), "config.yaml")
    script_dir = os.path.dirname(os.path.abspath(sys.argv[0]))
    script_config = os.path.join(script_dir, "config.yaml")

    yaml_path = cwd_config if os.path.exists(cwd_config) else script_config if os.path.exists(script_config) else None

    if yaml_path:
        try:
            with open(yaml_path, "r", encoding="utf-8") as f:
                yaml_data = yaml.safe_load(f)
                if yaml_data and "serial" in yaml_data:
                    config["port"] = yaml_data["serial"].get("port", config["port"])
                    config["baudrate"] = yaml_data["serial"].get("baudrate", config["baudrate"])
                    config["timeout"] = yaml_data["serial"].get("timeout", config["timeout"])
        except Exception as e:
            print(f"Fehler beim Laden der Konfigurationsdatei {yaml_path}: {e}")

    if cli_args:
        if getattr(cli_args, "port", None) is not None:
            config["port"] = cli_args.port
        if getattr(cli_args, "baudrate", None) is not None:
            config["baudrate"] = cli_args.baudrate
        if getattr(cli_args, "timeout", None) is not None:
            config["timeout"] = cli_args.timeout

    return config