mod dem;
use std::io::{self, BufRead};

use crate::dem::elevation_from_coordinates;

use axum_macros::debug_handler;
use axum::{
    extract::Path, http::StatusCode, routing::{get, post}, Json, Router, 
};


#[tokio::main]
async fn main() {
    // initialize tracing
    tracing_subscriber::fmt::init();

    // build our application with a route
    let app = Router::new()
        // `GET /` goes to `root`
        .route("/", get(root))
        .route("/elevation/:lat/:lon", get(get_elevation));

    // run our app with hyper, listening globally on port 3000
    let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
    axum::serve(listener, app).await.unwrap();
}

// basic handler that responds with a static string
async fn root() -> &'static str {
    "Hello, World!"
}


#[debug_handler]
async fn get_elevation(Path((lat, lon)): Path<(f64, f64)>) -> String{
    let ele = elevation_from_coordinates(lat, lon);
    format!("{ele}")
}