use log::{debug, error, info};
use std::env;
use surf::Url;

#[async_std::main]
async fn main() -> Result<(), std::io::Error> {
    // TODO json logging in the future?
    let logger_env = env_logger::Env::new().filter_or("RUST_LOG", "info");
    env_logger::init_from_env(logger_env);

    info!("Starting the kittybox server...");

    let redis_uri: String;
    match env::var("REDIS_URI") {
        Ok(val) => {
            debug!("Redis connection: {}", val);
            redis_uri = val
        }
        Err(_) => {
            error!("REDIS_URI is not set, cannot find a database");
            std::process::exit(1);
        }
    };
    let token_endpoint: Url;
    match env::var("TOKEN_ENDPOINT") {
        Ok(val) => {
            debug!("Token endpoint: {}", val);
            match Url::parse(&val) {
                Ok(val) => token_endpoint = val,
                _ => {
                    error!("Token endpoint URL cannot be parsed, aborting.");
                    std::process::exit(1)
                }
            }
        }
        Err(_) => {
            error!("TOKEN_ENDPOINT is not set, will not be able to authorize users!");
            std::process::exit(1)
        }
    }
    let authorization_endpoint: Url;
    match env::var("AUTHORIZATION_ENDPOINT") {
        Ok(val) => {
            debug!("Auth endpoint: {}", val);
            match Url::parse(&val) {
                Ok(val) => authorization_endpoint = val,
                _ => {
                    error!("Authorization endpoint URL cannot be parsed, aborting.");
                    std::process::exit(1)
                }
            }
        }
        Err(_) => {
            error!("AUTHORIZATION_ENDPOINT is not set, will not be able to confirm token and ID requests using IndieAuth!");
            std::process::exit(1)
        }
    }

    let media_endpoint: Option<String> = env::var("MEDIA_ENDPOINT").ok();

    let internal_token: Option<String> = env::var("KITTYBOX_INTERNAL_TOKEN").ok();

    let host = env::var("SERVE_AT")
        .ok()
        .unwrap_or_else(|| "0.0.0.0:8080".to_string());
    let app = kittybox::get_app_with_redis(
        token_endpoint,
        authorization_endpoint,
        redis_uri,
        media_endpoint,
        internal_token
    )
    .await;
    app.listen(host).await
}