import { injectable, type AssertionResult } from "@codemation/core";

@injectable()
export class AssertionResultGuard {
  isAssertionResult(value: unknown): value is AssertionResult {
    if (typeof value !== "object" || value === null) return false;
    const candidate = value as Partial<AssertionResult>;
    if (typeof candidate.name !== "string") return false;
    if (typeof candidate.score !== "number" || Number.isNaN(candidate.score)) return false;
    if (
      candidate.passThreshold !== undefined &&
      (typeof candidate.passThreshold !== "number" || Number.isNaN(candidate.passThreshold))
    ) {
      return false;
    }
    if (candidate.errored !== undefined && candidate.errored !== true) return false;
    return true;
  }
}