use super::{Node, NodeContext, NodeKind, NodeRequest, NodeResponse};
use crate::error::ServiceError;
use futures::Future;
use serde::Deserialize;
use serde_yml::Value;
use std::{pin::Pin, sync::Arc};

pub struct ErrorKind;

#[derive(Deserialize)]
#[serde(transparent)]
struct Error(String);

impl NodeKind for ErrorKind {
    fn name(&self) -> &'static str {
        "error"
    }
    fn instanciate(&self, config: Value) -> anyhow::Result<Arc<dyn Node>> {
        Ok(Arc::new(serde_yml::from_value::<Error>(config)?))
    }
}

impl Node for Error {
    fn handle<'a>(
        &'a self,
        _context: &'a mut NodeContext,
        _request: NodeRequest,
    ) -> Pin<Box<dyn Future<Output = Result<NodeResponse, ServiceError>> + Send + Sync + 'a>> {
        Box::pin(async move { Err(ServiceError::Custom(self.0.clone())) })
    }
}