export type StatsResponse = {
  total: number;
  byTemplate: Record<string, number>;
  updatedAt: string | null;
};

const configuredStatsApiBase = (import.meta.env.VITE_STATS_API_BASE || "").replace(/\/$/, "");

function buildStatsApiUrl(path: string) {
  return configuredStatsApiBase ? `${configuredStatsApiBase}${path}` : path;
}

export async function fetchStats(): Promise<StatsResponse> {
  const response = await fetch(buildStatsApiUrl("/api/stats"));

  if (!response.ok) {
    throw new Error("获取统计信息失败。");
  }

  return response.json();
}

export async function incrementGenerationCount(templateId: string): Promise<StatsResponse> {
  const response = await fetch(buildStatsApiUrl("/api/generate-count"), {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
    },
    body: JSON.stringify({ templateId }),
  });

  if (!response.ok) {
    throw new Error("记录生成次数失败。");
  }

  return response.json();
}