frontend/app/(main)/page.tsx

"use client";

import { SearchBar } from "@/components/molecules/search-bar";
import { CategorySidebar } from "@/components/organisms/navigation";
import { ProductGrid } from "@/components/organisms/product-grid";
import { eateryClient } from "@/lib/apollo-clients";
import { allEateriesQuery } from "@/lib/types";
import { gql } from "@apollo/client";
import { useQuery } from "@apollo/client/react";
import { useRouter } from "next/navigation";
import { useEffect, useState } from "react";

const GET_EATERY_COUNT = gql`
  {
    allEateries {
      id
    }
  }
`;

/**
 * Main page — sidebar + product grid layout.
 *
 * Layout:
 *   [Sidebar (sticky, collapsible)] | [Main content (scrollable)]
 *
 * Sidebar state:
 *   - Desktop (≥ 1024px): expanded by default
 *   - Mobile  (< 1024px): collapsed by default
 */
export default function Home() {
  const router = useRouter();

  const [isSidebarOpen, setIsSidebarOpen] = useState(false);
  const [searchQuery, setSearchQuery] = useState("");

  const { data, loading, error } = useQuery<allEateriesQuery>(
    GET_EATERY_COUNT,
    {
      client: eateryClient,
      fetchPolicy: "no-cache",
    },
  );

  useEffect(() => {
    if (!loading && data) {
      console.log(data);

      const count = data.allEateries.length ?? 0;
      if (count === 0) {
        router.push("/manager-signup");
      }
    }
  }, [data, loading, router]);

  useEffect(() => {
    const mq = window.matchMedia("(min-width: 1024px)");
    // eslint-disable-next-line react-hooks/set-state-in-effect
    setIsSidebarOpen(mq.matches);
    const handler = (e: MediaQueryListEvent) => setIsSidebarOpen(e.matches);
    mq.addEventListener("change", handler);
    return () => mq.removeEventListener("change", handler);
  }, []);

  if (loading) return <div>Loading...</div>;
  if (error) return <div>Error: {error.message}</div>;

  return (
    <div className="bg-background flex min-h-[calc(100vh-var(--spacing-header-height))] items-start">
      {/* ── Main content ── */}
      <main className="min-w-0 flex-1 px-4 py-6 md:px-6 lg:px-8">
        {/* ── Section heading + search bar ── */}
        <div className="mb-5 flex flex-col justify-between gap-3 sm:flex-row sm:items-center">
          {/* Search bar */}
          <SearchBar
            value={searchQuery}
            onChange={(q) => {
              setSearchQuery(q);
            }}
            onClear={() => setSearchQuery("")}
            placeholder="Search items..."
            className="sm:max-w-xs"
          />
        </div>

        {/* ── Product grid (organism handles mobile category menu + grid) ── */}
        <ProductGrid searchQuery={searchQuery} isSidebarOpen={isSidebarOpen} />
      </main>
    </div>
  );
}