use std::fs;
use serde::{Deserialize, Serialize};
use serde::de::DeserializeOwned;

const CONFIG_LOCATIONS: [&str; 3] = [
    "config.json",
    "/etc/kps/config.json",
    "~/.config/kps/config.json",
];

#[derive(Serialize, Deserialize, Debug)]
pub struct ClientConfig {
    pub private_key: String,
    pub db_path: String,
    pub server_url: String,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct ServerConfig {
    pub public_key: String,
    pub vaults_directory: String
}

pub fn read_config<T: DeserializeOwned>() -> Option<T> {
    for file in CONFIG_LOCATIONS {
        let data = fs::read_to_string(file);
        if let Ok(data) = data {
            return Some(serde_json::from_str(data.as_str()).expect("Malformed config file"));
        }
    }
    None
}