import type { ErrorReport } from "./error";
import type { ProgressEvent } from "./progress";
import type { SceneSnapshotIR } from "./scene-ir";

export type EngineCommand =
  | { type: "init"; protocolVersion: number }
  | { type: "getSceneSnapshot"; sinceRevision?: number }
  | { type: "setFrame"; frame: number }
  | { type: "setObjectVisibility"; objectId: string; visible: boolean }
  | { type: "shutdown" };

export interface EngineRequest {
  requestId: string;
  expectedRevision: number;
  command: EngineCommand;
}

export interface EngineCapabilities {
  engine: "mock" | "blender-wasm";
  protocolVersion: number;
  supportsBlend: boolean;
  supportsMeshEdit: boolean;
}

export interface EngineResponse {
  requestId: string;
  ok: boolean;
  revision: number;
  capabilities?: EngineCapabilities;
  snapshot?: SceneSnapshotIR;
  progress?: ProgressEvent;
  reports?: ErrorReport[];
}