// 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::vm_proto;
use detee_shared::vm_proto::brain_vm_daemon_client::BrainVmDaemonClient;
use detee_shared::vm_proto::RegisterVmNodeReq;
use futures::StreamExt;
use tokio::sync::mpsc;
use tokio_stream::wrappers::ReceiverStream;
use tonic::transport::Channel;

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

    register_vm_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_vm_node(
    client: &mut BrainVmDaemonClient<Channel>,
    key: &Key,
    operator_wallet: &str,
) -> Result<Vec<vm_proto::DeleteVmReq>> {
    log::info!("Registering vm_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 = RegisterVmNodeReq {
        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,
    };

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

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

pub async fn daemon_listener(
    mut client: BrainVmDaemonClient<Channel>,
    key: Key,
    tx: mpsc::Sender<vm_proto::BrainVmMessage>,
) -> Result<()> {
    log::info!("listening vm_daemon");
    let mut grpc_stream =
        client.brain_messages(key.sign_stream_auth_vm(vec![])?).await?.into_inner();

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

    Ok(())
}

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

pub async fn daemon_engine(
    tx: mpsc::Sender<vm_proto::VmDaemonMessage>,
    mut rx: mpsc::Receiver<vm_proto::BrainVmMessage>,
    new_vm_err: Option<String>,
) -> Result<()> {
    log::info!("daemon engine vm_daemon");
    while let Some(brain_msg) = rx.recv().await {
        match brain_msg.msg {
            Some(vm_proto::brain_vm_message::Msg::NewVmReq(new_vm_req)) => {
                let exposed_ports = [vec![22], new_vm_req.extra_ports].concat();
                let args = Some(vm_proto::MeasurementArgs {
                    dtrfs_api_endpoint: String::from("184.107.169.199:48865"),
                    exposed_ports,
                    ovmf_hash: String::from(
                        "0346619257269b9a61ee003e197d521b8e2283483070d163a34940d6a1d40d76",
                    ),
                    ips: vec![],
                });

                let new_vm_resp = vm_proto::NewVmResp {
                    vm_id: new_vm_req.vm_id.clone(),
                    args,
                    error: new_vm_err.clone().unwrap_or_default(),
                };

                let res_data = vm_proto::VmDaemonMessage {
                    msg: Some(vm_proto::vm_daemon_message::Msg::NewVmResp(new_vm_resp)),
                };
                tx.send(res_data).await?;
            }
            Some(vm_proto::brain_vm_message::Msg::UpdateVmReq(_update_vm_req)) => {
                todo!()
            }
            Some(vm_proto::brain_vm_message::Msg::DeleteVm(del_vm_req)) => {
                println!("MOCK_VM_DAEMON::delete vm request for {}", del_vm_req.vm_id);
            }
            None => todo!(),
        }
    }

    Ok(())
}