import { NextRequest, NextResponse } from "next/server";

const BFF_BASE = process.env.BFF_URL || "http://localhost:8080";

export async function GET(request: NextRequest) {
  const { searchParams } = request.nextUrl;
  const q = searchParams.get("q") || "";
  const type = searchParams.get("type") || "all";
  const page = searchParams.get("page") || "1";
  const limit = searchParams.get("limit") || "20";

  if (!q.trim()) {
    return NextResponse.json({
      query: "",
      type,
      results: [],
      total: 0,
      page: 1,
      limit: 20,
      total_pages: 0,
    });
  }

  try {
    const url = new URL("/api/v1/search", BFF_BASE);
    url.searchParams.set("q", q);
    url.searchParams.set("type", type);
    url.searchParams.set("page", page);
    url.searchParams.set("limit", limit);

    const res = await fetch(url.toString(), {
      headers: { Accept: "application/json" },
    });

    if (!res.ok) {
      return NextResponse.json(
        {
          query: q,
          type,
          results: [],
          total: 0,
          page: Number(page),
          limit: Number(limit),
          total_pages: 0,
        },
        { status: res.status },
      );
    }

    const data = await res.json();
    // Unwrap BFF envelope: { data: { ... } } → { ... }
    const payload = data.data ?? data;
    return NextResponse.json(payload);
  } catch {
    return NextResponse.json(
      {
        query: q,
        type,
        results: [],
        total: 0,
        page: Number(page),
        limit: Number(limit),
        total_pages: 0,
      },
      { status: 502 },
    );
  }
}