use std::fmt::Debug;
use std::sync::Arc;

use giterated_models::{
    error::OperationError,
    object::{GiteratedObject, Object, ObjectRequestError},
    object_backend::ObjectBackend,
    operation::GiteratedOperation,
};

use crate::vtable::{AnyFailure, AnySuccess, OperationVTable};

use super::PluginState;

#[derive(Clone)]
pub struct RuntimeHandle {
    inner: Arc<RuntimeHandleInner>,
}

impl RuntimeHandle {
    pub async fn handle_serialized(
        &self,
        operation_name: &str,
        object: &str,
        operation: &[u8],
    ) -> Result<Vec<u8>, OperationError<Vec<u8>>> {
        todo!()
    }
}

#[repr(C)]
struct RuntimeHandleInner {
    state: PluginState,
    handle_serialized: unsafe extern "C" fn(
        object_kind: &str,
        operation_name: &str,
        object: &str,
        operation_payload: &[u8],
    ) -> HandlerResult,
}

unsafe impl Send for RuntimeHandleInner {}
unsafe impl Sync for RuntimeHandleInner {}

#[repr(C)]
struct HandlerResult {
    operation_vtable: OperationVTable,
    result: Result<AnySuccess, OperationError<AnyFailure>>,
}

#[async_trait::async_trait(?Send)]
impl<S: Send + Sync + Clone> ObjectBackend<S> for RuntimeHandle {
    async fn object_operation<O, D>(
        &self,
        object: O,
        operation: &str,
        payload: D,
        operation_state: &S,
    ) -> Result<D::Success, OperationError<D::Failure>>
    where
        O: GiteratedObject + Debug + 'static,
        D: GiteratedOperation<O> + Debug + 'static,
        D::Success: Clone,
        D::Failure: Clone,
    {
        todo!()
    }

    async fn get_object<O: GiteratedObject + Debug + 'static>(
        &self,
        object_str: &str,
        operation_state: &S,
    ) -> Result<Object<S, O, Self>, OperationError<ObjectRequestError>> {
        todo!()
    }
}