// SPDX-License-Identifier: Apache-2.0

use super::test_utils::Key;
use crate::common::test_utils::{generate_random_public_ip, get_ip_info};
use anyhow::Result;
use detee_shared::app_proto::brain_app_daemon_client::BrainAppDaemonClient;
use detee_shared::app_proto::{self, NewAppRes, RegisterAppNodeReq};
use detee_shared::common_proto::MappedPort;
use futures::StreamExt;
use tokio::sync::mpsc;
use tokio_stream::wrappers::ReceiverStream;
use tonic::transport::Channel;

pub async fn mock_app_daemon(
    brain_channel: &Channel,
    daemon_error: Option<String>,
) -> Result<String> {
    let mut daemon_client = BrainAppDaemonClient::new(brain_channel.clone());
    let daemon_key = Key::new();

    register_app_node(&mut daemon_client, &daemon_key, &Key::new().pubkey).await?;

    let (tx, brain_msg_rx) = tokio::sync::mpsc::channel(1);

    tokio::spawn(daemon_listener(daemon_client.clone(), daemon_key.clone(), tx));

    let (daemon_msg_tx, rx) = tokio::sync::mpsc::channel(1);
    tokio::spawn(daemon_msg_sender(
        daemon_client.clone(),
        daemon_key.clone(),
        daemon_msg_tx.clone(),
        rx,
    ));

    tokio::spawn(daemon_engine(daemon_msg_tx.clone(), brain_msg_rx, daemon_error));

    tokio::time::sleep(tokio::time::Duration::from_secs(1)).await;

    Ok(daemon_key.pubkey)
}

pub async fn register_app_node(
    client: &mut BrainAppDaemonClient<Channel>,
    key: &Key,
    operator_wallet: &str,
) -> Result<Vec<app_proto::DelAppReq>> {
    log::info!("Registering app_node: {}", key.pubkey);
    let node_pubkey = key.pubkey.clone();

    let ip = generate_random_public_ip().to_string();
    let ip_info = get_ip_info(&ip).await?;

    let req = RegisterAppNodeReq {
        node_pubkey,
        operator_wallet: operator_wallet.to_string(),
        main_ip: ip_info.ip,
        city: ip_info.city,
        country: ip_info.country,
        region: ip_info.region,
        price: 1200,
    };

    let mut grpc_stream = client.register_app_node(key.sign_request(req)?).await?.into_inner();

    let mut deleted_app_reqs = Vec::new();
    while let Some(stream_update) = grpc_stream.next().await {
        match stream_update {
            Ok(del_app_req) => {
                deleted_app_reqs.push(del_app_req);
            }
            Err(e) => {
                panic!("Received error instead of deleted_app_reqs: {e:?}");
            }
        }
    }
    Ok(deleted_app_reqs)
}

pub async fn daemon_listener(
    mut client: BrainAppDaemonClient<Channel>,
    key: Key,
    tx: mpsc::Sender<app_proto::BrainMessageApp>,
) -> Result<()> {
    log::info!("listening app_daemon");
    let mut grpc_stream =
        client.brain_messages(key.sign_stream_auth_app(vec![])?).await?.into_inner();

    while let Some(Ok(stream_update)) = grpc_stream.next().await {
        log::info!("app deamon got notified: {:?}", &stream_update);
        let _ = tx.send(stream_update).await;
    }

    Ok(())
}

pub async fn daemon_msg_sender(
    mut client: BrainAppDaemonClient<Channel>,
    key: Key,
    tx: mpsc::Sender<app_proto::DaemonMessageApp>,
    rx: mpsc::Receiver<app_proto::DaemonMessageApp>,
) -> Result<()> {
    log::info!("sender app_daemon");
    let rx_stream = ReceiverStream::new(rx);
    tx.send(app_proto::DaemonMessageApp {
        msg: Some(app_proto::daemon_message_app::Msg::Auth(key.sign_stream_auth_app(vec![])?)),
    })
    .await?;
    client.daemon_messages(rx_stream).await?;
    Ok(())
}

pub async fn daemon_engine(
    tx: mpsc::Sender<app_proto::DaemonMessageApp>,
    mut rx: mpsc::Receiver<app_proto::BrainMessageApp>,
    new_app_err: Option<String>,
) -> Result<()> {
    log::info!("daemon engine app_daemon");
    while let Some(brain_msg) = rx.recv().await {
        match brain_msg.msg {
            Some(app_proto::brain_message_app::Msg::NewAppReq(new_app_req)) => {
                let exposed_ports =
                    [vec![34500], new_app_req.resource.unwrap_or_default().ports].concat();

                let mapped_ports = exposed_ports
                    .into_iter()
                    .map(|port| MappedPort { host_port: port, guest_port: port })
                    .collect::<Vec<MappedPort>>();

                let res_data = NewAppRes {
                    app_id: new_app_req.app_id,
                    mapped_ports,
                    ip_address: "127.0.0.1".to_string(),
                    error: new_app_err.clone().unwrap_or_default(),
                };

                let res = app_proto::DaemonMessageApp {
                    msg: Some(app_proto::daemon_message_app::Msg::NewAppRes(res_data)),
                };
                tx.send(res).await?;
            }
            Some(app_proto::brain_message_app::Msg::DeleteAppReq(del_app_req)) => {
                println!("MOCK_APP_DAEMON::delete app request for {}", del_app_req.app_id);
            }
            None => todo!(),
        }
    }

    Ok(())
}