import json
import os

# User config file (not tracked by git)
CONFIG_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "config.json")

DEFAULT_CONFIG = {
    "civitai": {
        "proxy": None,
        "timeout_seconds": 30,
    }
}


def load_config() -> dict:
    """Load user config from config.json, fall back to defaults."""
    if not os.path.exists(CONFIG_PATH):
        return DEFAULT_CONFIG.copy()
    try:
        with open(CONFIG_PATH, "r", encoding="utf-8") as f:
            user_config = json.load(f)
        config = DEFAULT_CONFIG.copy()
        if "civitai" in user_config:
            config["civitai"].update(user_config["civitai"])
        return config
    except (json.JSONDecodeError, OSError):
        return DEFAULT_CONFIG.copy()


def get_proxy_url() -> str | None:
    """Get proxy URL string (e.g. 'http://127.0.0.1:7890') or None.

    Priority:
      1. config.json 'civitai.proxy' (explicit user setting)
      2. HTTP_PROXY / HTTPS_PROXY environment variables
      3. No proxy
    """
    config = load_config()
    proxy = config.get("civitai", {}).get("proxy")
    if proxy is not None:
        return str(proxy) if proxy else None

    # Fallback to environment variables
    https_proxy = os.environ.get("HTTPS_PROXY") or os.environ.get("https_proxy")
    if https_proxy:
        return https_proxy
    http_proxy = os.environ.get("HTTP_PROXY") or os.environ.get("http_proxy")
    if http_proxy:
        return http_proxy
    return None


def get_timeout() -> int:
    """Get request timeout in seconds."""
    config = load_config()
    return config.get("civitai", {}).get("timeout_seconds", 30)