use std::env;

use async_std::{fs, path::PathBuf};

#[derive(Clone)]
pub struct Config {
    pub files_dir: PathBuf,
    pub max_file_size: Option<u64>,
}

pub async fn get_config() -> Config {
    let max_file_size = env::var("UPLOAD_MAX_BYTES")
        .ok()
        .and_then(|variable| variable.parse().ok())
        .unwrap_or(8 * 1024 * 1024);
    let max_file_size = (max_file_size != 0).then(|| max_file_size);

    let files_dir = PathBuf::from(env::var("FILES_DIR").unwrap_or_else(|_| "./files".to_owned()));
    fs::create_dir_all(&files_dir)
        .await
        .expect("could not create directory for storing files");

    Config {
        files_dir,
        max_file_size,
    }
}