use serde::Deserialize;
use std::env;
use std::fs::File;
use std::io::BufReader;

#[derive(Deserialize)]
pub struct EmailServer {
    pub server_name: String,
    pub email: String,
    pub password: String,
}

#[derive(Deserialize)]
pub struct Address {
    pub name: String,
    pub user: String,
    pub domain: String,
}

#[derive(Deserialize)]
pub struct Config {
    pub path_prefix: String,
    pub email_server: EmailServer,
    pub email_from: Address,
    pub email_to: Address,
}

impl Config {
    pub fn new() -> Self {
        let config_file_var = "CF_CONFIG_FILE";
        let config_path = env::var(config_file_var)
            .unwrap_or_else(|_| panic!("Environment variable {config_file_var} missing!"));

        let config_file = File::open(&config_path).unwrap_or_else(|e| {
            panic!("Can not open the config file at the path {config_path}: {e}")
        });
        let config_reader = BufReader::new(config_file);
        let config: Self =
            serde_json::from_reader(config_reader).expect("Can not parse the config file as JSON!");

        config
    }
}