use std::{process, sync::mpsc::channel};

use models::Environment;

mod db;
mod error;
mod models;
mod requests;
mod services;

use db::{create_connection_pool, run_migrations};
use requests::start_app;
use services::{start_emailer_service, UserConfirmationMessage};
use tokio::runtime::Handle;

#[tokio::main]
async fn main() {
    let (tx, rx) = channel::<UserConfirmationMessage>();

    let env = match Environment::init(tx) {
        Ok(env) => env,
        Err(err) => {
            eprintln!("{err}");
            process::exit(1);
        }
    };

    let pool = create_connection_pool(env.db_connection_uri()).await;
    if let Err(err) = run_migrations(&pool).await {
        eprintln!("{err:?}");
        process::exit(2);
    }

    start_emailer_service(Handle::current(), env.assets_dir(), rx);

    if let Err(err) = start_app(pool, env).await {
        eprintln!("{err:?}");
        process::exit(3);
    }
}