import type {
  CircuitTreeResponseDto,
  ProjectHistoryStateDto,
} from "../types";

export interface CircuitEditorSnapshot {
  tree: CircuitTreeResponseDto;
  history: ProjectHistoryStateDto;
}

export async function loadCircuitEditorSnapshot(
  readTree: () => Promise<CircuitTreeResponseDto>,
  readHistory: () => Promise<ProjectHistoryStateDto>,
  maxAttempts = 3
): Promise<CircuitEditorSnapshot> {
  for (let attempt = 0; attempt < maxAttempts; attempt += 1) {
    const tree = await readTree();
    const history = await readHistory();
    if (tree.currentRevision === history.currentRevision) {
      return { tree, history };
    }
  }

  throw new Error(
    "Der Projektstand hat sich während des Ladens geändert. Bitte erneut versuchen."
  );
}