import { HandlerContext, Handlers } from "$fresh/server.ts";
import { searchMovie, searchTVShow } from "@lib/tmdb.ts";
import * as cache from "@lib/cache/cache.ts";
import { AccessDeniedError, BadRequestError } from "@lib/errors.ts";
import { json } from "@lib/helpers.ts";

type CachedMovieQuery = {
  lastUpdated: number;
  data: unknown;
};

const CACHE_INTERVAL = 1000 * 60 * 24 * 30;

const GET = async (
  req: Request,
  ctx: HandlerContext,
) => {
  const session = ctx.state.session;
  if (!session) {
    throw new AccessDeniedError();
  }

  const u = new URL(req.url);

  const query = u.searchParams.get("q");

  if (!query) {
    throw new BadRequestError();
  }

  const type = u.searchParams.get("type") || "movie";

  const cacheId = `/${type}/query/${query}`;

  const cachedResponse = await cache.get<CachedMovieQuery>(cacheId);
  if (
    cachedResponse && Date.now() < (cachedResponse.lastUpdated + CACHE_INTERVAL)
  ) {
    return json(cachedResponse.data);
  }

  const res = type === "movie"
    ? await searchMovie(query)
    : await searchTVShow(query);

  cache.set(
    cacheId,
    JSON.stringify({
      lastUpdated: Date.now(),
      data: res,
    }),
  );

  return new Response(JSON.stringify(res.results));
};

export const handler: Handlers = {
  GET,
};