package main

import (
	"context"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/model"
)

// streamSubject is the bus subject the loop's OnStream closure publishes each
// structured stream event to. The gateway hub subscribes to ws.> and carries a
// dedicated branch for this subject that maps the model.StreamEvent to the typed
// downstream WS event (message.*/thinking.*/tool_call.*) with a seq number.
//
// It MUST stay in sync with wsStreamSubject in internal/services/gateway/ws_hub.go;
// the two packages cannot share a const without pulling the gateway into the
// main binary's import graph, so the literal is duplicated and documented.
const streamSubject = "ws.stream"

// streamChunk is the loop's OnStream callback. It publishes one structured
// stream event to the gateway's streaming subject so the hub fans it out to
// every client as the matching typed WS event. It is a no-op when no bus is
// wired and never blocks the loop: bus.Publish is asynchronous and a full
// per-subscription buffer drops the event rather than stalling the model stream.
func (a *app) streamChunk(ev model.StreamEvent) {
	if a.bus == nil {
		return
	}
	if err := a.bus.Publish(context.Background(), streamSubject, ev); err != nil {
		a.log.Warn("stream event publish", "err", err)
	}
}