research

export interface FactCheckResult {
  publisher: string;
  rating: string;
  url: string;
  reviewDate: string;
}

export interface FactCheckResponse {
  claim: string;
  factChecks: FactCheckResult[];
  covered: boolean;
}

export async function checkGoogleFactCheck(
  claim: string,
  apiKey?: string,
): Promise<FactCheckResponse> {
  const params = new URLSearchParams({ query: claim, languageCode: "en" });
  if (apiKey) params.set("key", apiKey);
  const url = `https://factchecktools.googleapis.com/v1alpha1/claims:search?${params}`;
  const ctrl = new AbortController();
  const timer = setTimeout(() => ctrl.abort(), 10_000);
  try {
    const res = await fetch(url, {
      signal: ctrl.signal,
      headers: { "User-Agent": "research-plugin/1.0" },
    });
    if (!res.ok) throw new Error(`Fact Check API HTTP ${res.status}`);
    const data = await res.json() as {
      claims?: Array<{
        claimReview?: Array<{
          publisher?: { name?: string; site?: string };
          url?: string;
          reviewDate?: string;
          textualRating?: string;
        }>;
      }>;
    };
    const factChecks: FactCheckResult[] = [];
    for (const c of data.claims ?? []) {
      for (const r of c.claimReview ?? []) {
        factChecks.push({
          publisher: r.publisher?.name ?? r.publisher?.site ?? "Unknown",
          rating: r.textualRating ?? "Unknown",
          url: r.url ?? "",
          reviewDate: r.reviewDate ?? "",
        });
      }
    }
    return { claim, factChecks, covered: factChecks.length > 0 };
  } finally {
    clearTimeout(timer);
  }
}