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mod errors;
mod logger;

use axum::{
    http::{header, Request},
    routing::get,
    Json, Router,
};
use serde::Serialize;
use std::time::Duration;
use tower_http::sensitive_headers::SetSensitiveHeadersLayer;
use tower_http::{classify::ServerErrorsFailureClass, trace::TraceLayer};
use tracing::Span;

#[tokio::main]
async fn main() {
    let app = create_app().await;

    let addr: String =
        std::env::var("ALLOWED_HOST").unwrap_or_else(|_| "localhost:3000".to_string());
    tracing::info!("Listening on {}", addr);

    axum::Server::bind(&"127.0.0.1:3000".parse().unwrap())
        .serve(app.into_make_service())
        .await
        .unwrap();
}

async fn create_app() -> Router {
    logger::setup();

    Router::new()
        .route("/", get(hej))
        // Mark the `Authorization` request header as sensitive so it doesn't
        // show in logs.
        .layer(SetSensitiveHeadersLayer::new(std::iter::once(
            header::AUTHORIZATION,
        )))
        .layer(
            TraceLayer::new_for_http()
                .on_request(|request: &Request<_>, _span: &Span| {
                    tracing::info!("{} {}", request.method(), request.uri());
                })
                .on_failure(
                    |error: ServerErrorsFailureClass, latency: Duration, _span: &Span| {
                        tracing::error!("{} | {} s", error, latency.as_secs());
                    },
                ),
        )
}

// Example root which says hi
async fn hej() -> Result<Json<Hej>, errors::Error> {
    Ok(Json(Hej::new("hej verden".to_string())))
}

#[derive(Debug, Serialize)]
struct Hej {
    hello: String,
}

impl Hej {
    fn new(hello: String) -> Self {
        Self { hello }
    }
}