"use client";

import { FormEvent, useEffect, useMemo, useState } from "react";
import Link from "next/link";
import { useSearchParams } from "next/navigation";
import { Suspense } from "react";
import { Button, Container } from "@/components/ui";
import { loadCommercialBundles, loadCommercialProducts } from "@/modules/commercial/adapters";
import type { CommercialBundle, CommercialProduct } from "@/modules/commercial/types";
import { resolveProductLaunchUrl } from "@/modules/commercial/types";
import { CommercialEmptyState, CommercialSkeleton } from "@/modules/commercial/components";

const HELP_HITS = [
  { id: "help-discover", label: "کشف کسب‌وکار", href: "/discover", kind: "help" },
  { id: "help-billing", label: "Billing و Trial", href: "/billing", kind: "help" },
  { id: "help-domains", label: "دامنه و SSL", href: "/domains", kind: "help" },
  { id: "help-settings", label: "تنظیمات حساب", href: "/dashboard/settings", kind: "settings" },
  { id: "help-center", label: "مرکز راهنما", href: "/help", kind: "help" },
];

function SearchInner() {
  const params = useSearchParams();
  const initial = params.get("q") || "";
  const [q, setQ] = useState(initial);
  const [query, setQuery] = useState(initial);
  const [products, setProducts] = useState<CommercialProduct[]>([]);
  const [bundles, setBundles] = useState<CommercialBundle[]>([]);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    void Promise.all([loadCommercialProducts(), loadCommercialBundles()]).then(([p, b]) => {
      if (p.availability === "ready") setProducts(p.data);
      if (b.availability === "ready") setBundles(b.data);
      setLoading(false);
    });
  }, []);

  const needle = query.trim().toLowerCase();

  const results = useMemo(() => {
    if (!needle) return [];
    const hits: Array<{ id: string; label: string; href: string; kind: string }> = [];
    for (const p of products) {
      if (
        p.display_name.toLowerCase().includes(needle) ||
        p.product_code.toLowerCase().includes(needle) ||
        (p.category || "").toLowerCase().includes(needle)
      ) {
        hits.push({
          id: p.product_code,
          label: p.display_name,
          href: resolveProductLaunchUrl(p) || `/setup/${encodeURIComponent(p.product_code)}`,
          kind: "product",
        });
      }
    }
    for (const b of bundles) {
      if (
        b.display_name.toLowerCase().includes(needle) ||
        b.bundle_code.toLowerCase().includes(needle)
      ) {
        hits.push({
          id: b.bundle_code,
          label: b.display_name,
          href: "/apps",
          kind: "bundle",
        });
      }
    }
    for (const h of HELP_HITS) {
      if (h.label.toLowerCase().includes(needle) || h.kind.includes(needle)) {
        hits.push(h);
      }
    }
    return hits;
  }, [needle, products, bundles]);

  const onSubmit = (e: FormEvent) => {
    e.preventDefault();
    setQuery(q);
  };

  return (
    <Container className="py-12">
      <h1 className="text-3xl font-extrabold text-secondary dark:text-gray-100">جستجوی سراسری</h1>
      <p className="mt-2 text-sm text-gray-600 dark:text-gray-400">
        اپ‌ها، محصولات، باندل‌ها، تنظیمات و راهنما.
      </p>
      <form onSubmit={onSubmit} className="mt-6 flex flex-wrap gap-2">
        <input
          value={q}
          onChange={(e) => setQ(e.target.value)}
          placeholder="جستجو…"
          aria-label="عبارت جستجو"
          className="min-w-[220px] flex-1 rounded-xl border border-gray-200 px-4 py-2.5 text-sm dark:border-gray-700 dark:bg-gray-900"
        />
        <Button type="submit">جستجو</Button>
      </form>

      {loading ? <div className="mt-8"><CommercialSkeleton rows={3} /></div> : null}

      {!loading && !needle ? (
        <div className="mt-8">
          <CommercialEmptyState
            title="عبارتی وارد کنید"
            description="نام محصول، باندل یا موضوع راهنما را جستجو کنید."
            actionHref="/apps"
            actionLabel="مرور Apps"
            secondaryHref="/help"
            secondaryLabel="مرکز راهنما"
          />
        </div>
      ) : null}

      {!loading && needle && !results.length ? (
        <div className="mt-8">
          <CommercialEmptyState
            title="نتیجه‌ای نیست"
            description="چیزی با این عبارت در رجیستری یا راهنما پیدا نشد."
            actionHref="/discover"
            actionLabel="کشف کسب‌وکار"
            secondaryHref="/help"
            secondaryLabel="راهنما"
          />
        </div>
      ) : null}

      {results.length ? (
        <ul className="mt-8 space-y-2">
          {results.map((r) => (
            <li key={`${r.kind}-${r.id}`}>
              <Link
                href={r.href}
                className="flex items-center justify-between rounded-xl border border-gray-100 bg-white px-4 py-3 text-sm hover:border-primary dark:border-gray-800 dark:bg-gray-900"
              >
                <span className="font-medium text-secondary dark:text-gray-100">{r.label}</span>
                <span className="text-[10px] uppercase text-gray-400">{r.kind}</span>
              </Link>
            </li>
          ))}
        </ul>
      ) : null}
    </Container>
  );
}

export default function SearchPage() {
  return (
    <Suspense fallback={<Container className="py-16 text-center text-sm text-gray-500">…</Container>}>
      <SearchInner />
    </Suspense>
  );
}