use std::{time::{UNIX_EPOCH, SystemTime}, env, net::IpAddr};

use config::Config;

use server::server::Server;
use tracing::metadata::LevelFilter;
use tracing_subscriber::{
    filter::filter_fn, prelude::__tracing_subscriber_SubscriberExt, util::SubscriberInitExt, Layer,
};

mod config;
mod packet;
mod server;

#[tokio::main]
async fn main() {
    tracing_subscriber::registry()
        .with(
            tracing_subscriber::fmt::layer()
                .with_filter(LevelFilter::TRACE)
                .with_filter(filter_fn(|metadata| {
                    metadata.target().starts_with("wrapper")
                })),
        )
        .init();

    let mut config = Config::new();

    if let Ok(port) = env::var("PORT").unwrap_or(String::new()).parse::<u16>() {
        config.set_port(port);
    }

    if let Ok(fallback) = env::var("FALLBACK_DNS").unwrap_or(String::new()).parse::<IpAddr>() {
        config.set_fallback_ns(&fallback);
    }

    let server = Server::new(config).await.expect("Failed to bind server");

    server.run().await.unwrap();
}

pub fn get_time() -> u64 {
    let start = SystemTime::now();
    let since_the_epoch = start
        .duration_since(UNIX_EPOCH)
        .expect("Time went backwards");
    since_the_epoch.as_millis() as u64
}