use detee_shared::general_proto::brain_general_cli_server::BrainGeneralCliServer;
use detee_shared::vm_proto::brain_vm_cli_server::BrainVmCliServer;
use detee_shared::vm_proto::brain_vm_daemon_server::BrainVmDaemonServer;
use dotenv::dotenv;
use hyper_util::rt::TokioIo;
use std::net::SocketAddr;
use std::sync::Arc;
use surreal_brain::grpc;
use surrealdb::engine::remote::ws::Client;
use surrealdb::Surreal;
use tokio::io::DuplexStream;
use tokio::net::TcpListener;
use tokio::sync::OnceCell;
use tonic::transport::{Channel, Endpoint, Server, Uri};
use tower::service_fn;

pub static DB_STATE: OnceCell<()> = OnceCell::const_new();

pub async fn prepare_test_db() -> Surreal<Client> {
    dotenv().ok();

    let db_url = std::env::var("DB_URL").expect("DB_URL not set in .env");
    let db_user = std::env::var("DB_USER").expect("DB_USER not set in .env");
    let db_pass = std::env::var("DB_PASS").expect("DB_PASS not set in .env");
    let db_ns = "test_brain";
    let db_name = "test_migration_db";

    let db = surreal_brain::db::db_connection(&db_url, &db_user, &db_pass, &db_ns, &db_name)
        .await
        .unwrap();
    DB_STATE
        .get_or_init(|| async {
            let old_brain_data = surreal_brain::old_brain::BrainData::load_from_disk().unwrap();
            db.query(format!("REMOVE DATABASE {db_name}")).await.unwrap();
            db.query(std::fs::read_to_string("interim_tables.surql").unwrap()).await.unwrap();
            surreal_brain::db::migration0(&db, &old_brain_data).await.unwrap();
        })
        .await;
    db
}

pub async fn run_service_in_background() -> SocketAddr {
    dotenv().ok();
    let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
    let addr = listener.local_addr().unwrap();

    let db_url = std::env::var("DB_URL").expect("DB_URL not set in .env");
    let db_user = std::env::var("DB_USER").expect("DB_USER not set in .env");
    let db_pass = std::env::var("DB_PASS").expect("DB_PASS not set in .env");
    let db_ns = "test_brain";
    let db_name = "test_migration_db";

    tokio::spawn(async move {
        let db = surreal_brain::db::db_connection(&db_url, &db_user, &db_pass, &db_ns, &db_name)
            .await
            .unwrap();
        let db_arc = Arc::new(db);

        Server::builder()
            .add_service(BrainGeneralCliServer::new(grpc::general::BrainGeneralCliServer::new(
                db_arc.clone(),
            )))
            .add_service(BrainVmCliServer::new(grpc::vm::BrainVmCliServer::new(db_arc.clone())))
            .add_service(BrainVmDaemonServer::new(grpc::vm::BrainVmDaemonServer::new(db_arc.clone())))
            .serve_with_incoming(tokio_stream::wrappers::TcpListenerStream::new(listener))
            .await
            .unwrap();
    });

    tokio::time::sleep(tokio::time::Duration::from_millis(300)).await;

    addr
}

pub async fn run_service_for_stream_server() -> DuplexStream {
    dotenv().ok();
    let (client, server) = tokio::io::duplex(1024);

    let db_url = std::env::var("DB_URL").expect("DB_URL not set in .env");
    let db_user = std::env::var("DB_USER").expect("DB_USER not set in .env");
    let db_pass = std::env::var("DB_PASS").expect("DB_PASS not set in .env");
    let db_ns = "test_brain";
    let db_name = "test_migration_db";

    tokio::spawn(async move {
        let db = surreal_brain::db::db_connection(&db_url, &db_user, &db_pass, &db_ns, &db_name)
            .await
            .unwrap();
        let db_arc = Arc::new(db);

        tonic::transport::Server::builder()
            .add_service(BrainGeneralCliServer::new(grpc::general::BrainGeneralCliServer::new(db_arc.clone())))
            .add_service(BrainVmCliServer::new(grpc::vm::BrainVmCliServer::new(db_arc.clone())))
            .add_service(BrainVmDaemonServer::new(grpc::vm::BrainVmDaemonServer::new(db_arc.clone())))
            .serve_with_incoming(tokio_stream::once(Ok::<_, std::io::Error>(server)))
            .await
    });
    client
}

pub async fn connect_stream_client_channel(c_stream: DuplexStream) -> Channel {
    let mut client = Some(c_stream);

    Endpoint::from_static("http://127.0.0.1:0")
        .connect_with_connector(service_fn(move |_: Uri| {
            let client = client.take().unwrap();
            async move { Ok::<TokioIo<DuplexStream>, std::io::Error>(TokioIo::new(client)) }
        }))
        .await
        .unwrap()
}

pub async fn run_service_for_stream() -> Channel {
    let client = run_service_for_stream_server().await;
    connect_stream_client_channel(client).await
}