use std::fs;
use std::path::Path;

#[derive(serde::Serialize, serde::Deserialize)]
pub struct Config {
    pub api_base_url: String,
    pub sn: Option<String>,
}

impl Config {
    pub fn load(path: &Path) -> Self {
        if path.exists() {
            fs::read_to_string(path)
                .ok()
                .and_then(|s| serde_json::from_str(&s).ok())
                .unwrap_or_default()
        } else {
            Config::default()
        }
    }

    pub fn save(&self, path: &Path) {
        if let Ok(json) = serde_json::to_string_pretty(self) {
            fs::write(path, json).ok();
        }
    }
}

impl Default for Config {
    fn default() -> Self {
        Config {
            api_base_url: "http://localhost:8080".to_string(),
            sn: None,
        }
    }
}