use actix_web::middleware::Logger;
use actix_web::{App, HttpResponse, HttpServer, Responder, get, post, web};
use clap::Parser;
use env_logger::Env;

/// Simple hello world HTTP server
#[derive(clap::Parser, Debug)]
#[command(version, about, long_about = None)]
struct Args {
    /// Listen address
    #[arg(env, short, long, default_value = "0.0.0.0:8000")]
    listen_addr: String,
}

#[get("/")]
async fn hello() -> impl Responder {
    HttpResponse::Ok().body("Hello world!")
}

#[post("/echo")]
async fn echo(req_body: String) -> impl Responder {
    HttpResponse::Ok().body(req_body)
}

async fn manual_hello() -> impl Responder {
    HttpResponse::Ok().body("Hey there!")
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    env_logger::init_from_env(Env::default().default_filter_or("info"));

    let args = Args::parse();

    log::info!("Starting to listen on {}", args.listen_addr);

    HttpServer::new(|| {
        App::new()
            .wrap(Logger::default())
            .service(hello)
            .service(echo)
            .route("/hey", web::get().to(manual_hello))
    })
    .bind(args.listen_addr)?
    .run()
    .await
}

#[cfg(test)]
mod test {
    use crate::Args;
    #[test]
    fn verify_cli() {
        use clap::CommandFactory;
        Args::command().debug_assert()
    }
}