"use client";

import Image from "next/image";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { Search, X } from "lucide-react";
import { FormEvent, useEffect, useState } from "react";
import { Input } from "@/components/ui/input";
import type { Product } from "@/lib/headless/types";

export function PredictiveSearch() {
  const router = useRouter();
  const [query, setQuery] = useState("");
  const [matches, setMatches] = useState<Product[]>([]);
  const [loading, setLoading] = useState(false);
  const normalized = query.trim();

  useEffect(() => {
    if (normalized.length < 2) {
      setMatches([]);
      setLoading(false);
      return;
    }

    const controller = new AbortController();
    setLoading(true);
    const timer = setTimeout(() => {
      fetch(`/api/search?q=${encodeURIComponent(normalized)}`, {
        signal: controller.signal,
      })
        .then((response) => response.json())
        .then((data: { products?: Product[] }) => {
          setMatches((data.products ?? []).slice(0, 6));
        })
        .catch((error) => {
          if ((error as Error).name !== "AbortError") setMatches([]);
        })
        .finally(() => setLoading(false));
    }, 250);

    return () => {
      clearTimeout(timer);
      controller.abort();
    };
  }, [normalized]);

  const submit = (event: FormEvent<HTMLFormElement>) => {
    event.preventDefault();
    const value = query.trim();
    if (!value) return;
    router.push(`/catalog?q=${encodeURIComponent(value)}`);
    setQuery("");
  };

  return (
    <form onSubmit={submit} className="relative w-full">
      <div className="flex items-center rounded-full border-2 border-slate-200 bg-white pl-5 pr-1.5 shadow-sm transition focus-within:border-ari-marino focus-within:ring-4 focus-within:ring-ari-coral-claro/30">
        <Input value={query} onChange={(event) => setQuery(event.target.value)} placeholder="Busca juguetes, mochilas, personajes…" className="h-[48px] border-0 bg-transparent p-0 shadow-none focus-visible:ring-0" />
        {query && <button type="button" aria-label="Limpiar búsqueda" className="mr-1 shrink-0 rounded-full p-1.5 text-slate-400 hover:bg-slate-100" onClick={() => setQuery("")}><X className="size-4" /></button>}
        <button type="submit" aria-label="Buscar" className="grid size-10 shrink-0 place-items-center rounded-full bg-ari-marino text-white transition hover:brightness-110">
          <Search className="size-4.5" />
        </button>
      </div>
      {loading && normalized.length >= 2 && matches.length === 0 && (
        <div className="absolute left-0 right-0 top-[calc(100%+10px)] z-50 rounded-2xl border border-slate-200 bg-white p-4 text-center text-sm text-slate-500 shadow-2xl">
          Buscando…
        </div>
      )}
      {matches.length > 0 && (
        <div className="absolute left-0 right-0 top-[calc(100%+10px)] z-50 overflow-hidden rounded-2xl border border-slate-200 bg-white p-2 shadow-2xl">
          {matches.map((product) => (
            <Link key={product.id} href={`/product/${product.slug}`} prefetch={false} className="grid grid-cols-[54px_1fr] items-center gap-3 rounded-xl p-2 hover:bg-ari-marino/5" onClick={() => setQuery("")}>
              <div className="relative aspect-square overflow-hidden rounded-lg bg-slate-100"><Image src={product.thumbnail} alt="" fill sizes="54px" className="object-cover" /></div>
              <div><strong className="line-clamp-1 text-sm">{product.name}</strong><span className="text-xs text-slate-500">{product.category} · {product.collection}</span></div>
            </Link>
          ))}
          <button type="submit" className="mt-1 w-full rounded-xl bg-ari-marino px-4 py-3 text-sm font-black text-white hover:brightness-110">Buscar “{query.trim()}” en todo el catálogo</button>
        </div>
      )}
    </form>
  );
}