import "server-only";

import { getYoutubeSubscriberCount } from "./youtube";
import { getRobloxFollowerCount } from "./roblox";
import { getDiscordMemberCount } from "./discord";
import { getTiktokProfile, type TiktokProfile } from "./tiktok";

export type { TiktokProfile };

import { FollowerCounts } from "./utils";

const CACHE_KEY = "erika:follower_counts";
const CACHE_KEY_TIKTOK = "erika:tiktok_profile";
const CACHE_TTL = 3600; // 1 hour

export interface FetchResult {
  counts: FollowerCounts;
  tiktokProfile: TiktokProfile;
}

async function fetchFollowerCountsFromAPIs(): Promise<FetchResult> {
  const [youtube, roblox, discord, tiktokProfileResult] = await Promise.all([
    getYoutubeSubscriberCount(),
    getRobloxFollowerCount(),
    getDiscordMemberCount(),
    getTiktokProfile(),
  ]);

  const counts: FollowerCounts = {
    youtube,
    roblox,
    discord,
    tiktok: tiktokProfileResult.followerCount,
  };

  return { counts, tiktokProfile: tiktokProfileResult };
}

export async function getFollowerCounts(): Promise<FetchResult> {
  try {
    const { getRedisClient } = await import("@/lib/redis");
    const redis = await getRedisClient();
    const [cachedCounts, cachedProfile] = await Promise.all([
      redis.get(CACHE_KEY),
      redis.get(CACHE_KEY_TIKTOK),
    ]);
    if (cachedCounts && cachedProfile) {
      return {
        counts: JSON.parse(cachedCounts),
        tiktokProfile: JSON.parse(cachedProfile),
      };
    }
  } catch {
    // Redis unavailable, fall through to fetch
  }

  const result = await fetchFollowerCountsFromAPIs();

  try {
    const { getRedisClient } = await import("@/lib/redis");
    const redis = await getRedisClient();
    await Promise.all([
      redis.set(CACHE_KEY, JSON.stringify(result.counts), "EX", CACHE_TTL),
      redis.set(
        CACHE_KEY_TIKTOK,
        JSON.stringify(result.tiktokProfile),
        "EX",
        CACHE_TTL,
      ),
    ]);
  } catch {
    // Redis unavailable, skip caching
  }

  return result;
}