import { NextRequest } from "next/server";
import { z } from "zod";
import { searchEntries, getEntryFacets } from "@/server/repo";
import { parseIdList } from "@/utils/params";

const querySchema = z.object({
  q: z.string().optional(),
  page: z.coerce.number().int().positive().optional(),
  pageSize: z.coerce.number().int().positive().max(100).optional(),
  genreId: z.coerce.number().int().positive().optional(),
  languageId: z
    .string()
    .trim()
    .length(2, "languageId must be a 2-char code")
    .optional(),
  machinetypeId: z.string().optional(),
  year: z.coerce.number().int().optional(),
  sort: z.enum(["title", "id_desc"]).optional(),
  scope: z.enum(["title", "title_aliases", "title_aliases_origins"]).optional(),
  facets: z.coerce.boolean().optional(),
});

export async function GET(req: NextRequest) {
  const { searchParams } = new URL(req.url);
  const parsed = querySchema.safeParse({
    q: searchParams.get("q") ?? undefined,
    page: searchParams.get("page") ?? undefined,
    pageSize: searchParams.get("pageSize") ?? undefined,
    genreId: searchParams.get("genreId") ?? undefined,
    languageId: searchParams.get("languageId") ?? undefined,
    machinetypeId: searchParams.get("machinetypeId") ?? undefined,
    year: searchParams.get("year") ?? undefined,
    sort: searchParams.get("sort") ?? undefined,
    scope: searchParams.get("scope") ?? undefined,
    facets: searchParams.get("facets") ?? undefined,
  });
  if (!parsed.success) {
    return new Response(
      JSON.stringify({ error: parsed.error.flatten() }),
      { status: 400, headers: { "content-type": "application/json" } }
    );
  }
  const machinetypeId = parseIdList(parsed.data.machinetypeId);
  const searchParamsParsed = { ...parsed.data, machinetypeId };
  const data = await searchEntries(searchParamsParsed);
  const body = parsed.data.facets
    ? { ...data, facets: await getEntryFacets(searchParamsParsed) }
    : data;
  return new Response(JSON.stringify(body), {
    headers: { "content-type": "application/json" },
  });
}

// Ensure Node.js runtime (required for mysql2)
export const runtime = "nodejs";