use anyhow::Result;
use log::LevelFilter;

use kochab::{Request, Response, Server};

#[tokio::main]
/// This is a super quick demonstration of how you can check user certificates with kochab
///
/// The goal of this example is just to read the user's certificate and tell them their
/// certificate fingerprint, or if they aren't using a certificate, just tell them that
/// they didn't provide one.
///
/// You can of course require a certificate by sending a [`Response::client_certificate_required()`].
/// But, if you're interested in more advanced user management features, like letting
/// users create an account and persist data, you might want to check out the
/// user_management feature.
async fn main() -> Result<()> {

    // We set up logging so we can see what's happening.  This isn't technically required,
    // and you can use a simpler solution (like env_logger::init()) during production
    env_logger::builder()
        .filter_module("kochab", LevelFilter::Debug)
        .init();

    Server::new()                       // Create a new server
        .add_route("/", handle_request) // Bind our handling function to the root path
        .serve_ip("localhost:1965")     // Start serving content on the default gemini port
        .await
}

/// This is the actual handler that does most of the actual work.
/// It'll be called by the server when we receive a request
async fn handle_request(request: Request) -> Result<Response> {

    if let Some(fingerprint) = request.fingerprint() {
        let message = format!(
            "You connected with a certificate with a fingerprint of:\n{}",
            fingerprint,
        );

        Ok(Response::success_plain(message))
    } else {
        // The user didn't provide a certificate
        Ok(Response::client_certificate_required("You didn't provide a client certificate"))
    }
}