#![allow(dead_code)]
use super::challenge::NodeUpdate;
use crate::{
    datastore::{Store, LOCALHOST},
    grpc::challenge::{update_client::UpdateClient, Empty},
};
use solana_sdk::{pubkey::Pubkey, signature::keypair::Keypair};
use std::{str::FromStr, sync::Arc};
use tokio::{
    sync::broadcast::Sender,
    time::{sleep, Duration},
};
use tokio_stream::{wrappers::BroadcastStream, StreamExt};

#[derive(Clone)]
pub struct ConnManager {
    ds: Arc<Store>,
    tx: Sender<NodeUpdate>,
}

impl ConnManager {
    pub fn init(ds: Arc<Store>, tx: Sender<NodeUpdate>) -> Self {
        Self { ds, tx }
    }

    pub async fn start_with_node(self, node_ip: String) {
        self.connect_wrapper(node_ip).await;
    }

    pub async fn start(self) {
        loop {
            if let Some(node) = self.ds.get_random_node() {
                if node != LOCALHOST {
                    self.connect_wrapper(node.clone()).await;
                }
            }
            sleep(Duration::from_secs(3)).await;
        }
    }

    async fn connect_wrapper(&self, node_ip: String) {
        let ds = self.ds.clone();
        ds.add_conn(&node_ip);
        if let Err(e) = self.connect(node_ip.clone()).await {
            println!("Client connection for {node_ip} failed: {e:?}");
        }
        ds.delete_conn(&node_ip);
    }

    async fn connect(&self, node_ip: String) -> Result<(), Box<dyn std::error::Error>> {
        use detee_sgx::{prelude::*, RaTlsConfigBuilder};
        use hyper::Uri;
        use hyper_util::{client::legacy::connect::HttpConnector, rt::TokioExecutor};
        use tokio_rustls::rustls::ClientConfig;

        println!("Connecting to {node_ip}...");

        let mrsigner_hex = "83E8A0C3ED045D9747ADE06C3BFC70FCA661A4A65FF79A800223621162A88B76";
        let mrsigner =
            crate::sgx::mrsigner_from_hex(mrsigner_hex).expect("mrsigner decoding failed");
        let config = RaTlsConfig::new()
            .allow_instance_measurement(InstanceMeasurement::new().with_mrsigners(vec![mrsigner]));

        let tls = ClientConfig::from_ratls_config(config)
            .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, format!("{}", e)))?;

        let mut http = HttpConnector::new();
        http.enforce_http(false);

        let cloned_node_ip = node_ip.clone();

        let connector = tower::ServiceBuilder::new()
            .layer_fn(move |s| {
                let tls = tls.clone();

                hyper_rustls::HttpsConnectorBuilder::new()
                    .with_tls_config(tls)
                    .https_or_http()
                    .enable_http2()
                    .wrap_connector(s)
            })
            .map_request(move |_| {
                Uri::from_str(&format!("https://{cloned_node_ip}:31373"))
                    .expect("Could not parse URI")
            })
            .service(http);

        let client =
            hyper_util::client::legacy::Client::builder(TokioExecutor::new()).build(connector);

        let uri = Uri::from_static("https://example.com");
        let mut client = UpdateClient::with_origin(client, uri);

        let rx = self.tx.subscribe();
        let rx_stream = BroadcastStream::new(rx).filter_map(|n| n.ok());
        let response = client.get_updates(rx_stream).await?;
        let mut resp_stream = response.into_inner();

        let _ = self.tx.send((LOCALHOST.to_string(), self.ds.get_localhost()).into());

        while let Some(mut update) = resp_stream.message().await? {
            // "localhost" IPs need to be changed to the real IP of the counterpart
            if update.ip == LOCALHOST {
                update.ip = node_ip.clone();
                // since we are connecting TO this server, we have a guarantee that this
                // server is not behind NAT, so we can set it public
                update.public = true;
            }

            // update the entire network in case the information is new
            if self.ds.process_node_update(update.clone().into()).await
                && self.tx.send(update.clone()).is_err()
            {
                println!("tokio broadcast receivers had an issue consuming the channel");
            };
        }

        Ok(())
    }
}

pub async fn key_grabber(node_ip: String) -> Result<(Keypair, Pubkey), Box<dyn std::error::Error>> {
    use detee_sgx::{prelude::*, RaTlsConfigBuilder};
    use hyper::Uri;
    use hyper_util::{client::legacy::connect::HttpConnector, rt::TokioExecutor};
    use tokio_rustls::rustls::ClientConfig;

    println!("Getting key from {node_ip}...");

    let mrsigner_hex = "83E8A0C3ED045D9747ADE06C3BFC70FCA661A4A65FF79A800223621162A88B76";
    let mrsigner = crate::sgx::mrsigner_from_hex(mrsigner_hex).expect("mrsigner decoding failed");
    let config = RaTlsConfig::new()
        .allow_instance_measurement(InstanceMeasurement::new().with_mrsigners(vec![mrsigner]));

    let tls = ClientConfig::from_ratls_config(config)
        .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, format!("{}", e)))?;

    let mut http = HttpConnector::new();
    http.enforce_http(false);

    let cloned_node_ip = node_ip.clone();

    let connector = tower::ServiceBuilder::new()
        .layer_fn(move |s| {
            let tls = tls.clone();

            hyper_rustls::HttpsConnectorBuilder::new()
                .with_tls_config(tls)
                .https_or_http()
                .enable_http2()
                .wrap_connector(s)
        })
        .map_request(move |_| {
            Uri::from_str(&format!("https://{cloned_node_ip}:31373")).expect("Could not parse URI")
        })
        .service(http);

    let client = hyper_util::client::legacy::Client::builder(TokioExecutor::new()).build(connector);

    let uri = Uri::from_static("https://example.com");
    let mut client = UpdateClient::with_origin(client, uri);

    let response = client.get_keys(tonic::Request::new(Empty {})).await?;
    let response = &response.into_inner();
    let keypair = response.keypair.clone();
    let keypair = match Keypair::from_bytes(&keypair) {
        Ok(k) => k,
        Err(_) => return Err("Could not parse keypair.".into()),
    };
    let token_address = Pubkey::from_str(&response.token_address)
        .map_err(|_| "Could not parse wallet address.".to_string())?;
    Ok((keypair, token_address))
}