/**
 * SearchPanel — full hybrid_search page with form controls and rich result cards.
 *
 * Syncs URL params so results are shareable. Click a result to open its chunk
 * anchor in the V2 view.
 */
"use client";
import Image from "next/image";
import Link from "next/link";
import { useEffect, useState } from "react";
import { useRouter, useSearchParams } from "next/navigation";
import { SearchAutocomplete } from "./search-autocomplete";

interface Hit {
  chunk_id: string;
  doc_id: string;
  page: number;
  type: string;
  bbox: { x: number; y: number; w: number; h: number } | null;
  classification: string | null;
  snippet: string;
  score: number;
  href: string;
}

export function SearchPanel({
  initialQ,
  initialLang,
  initialType,
  initialDocId,
}: {
  initialQ: string;
  initialLang: "pt" | "en";
  initialType: string;
  initialDocId: string;
}) {
  const router = useRouter();
  const params = useSearchParams();
  const [q, setQ] = useState(initialQ);
  const [lang, setLang] = useState<"pt" | "en">(initialLang);
  const [type, setType] = useState(initialType);
  const [docId, setDocId] = useState(initialDocId);
  const [hits, setHits] = useState<Hit[]>([]);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  // Initial fetch if URL had params
  useEffect(() => {
    if (initialQ) doSearch(initialQ, initialLang, initialType, initialDocId);
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  async function doSearch(qStr: string, l: "pt" | "en", t: string, d: string) {
    if (!qStr.trim()) return;
    setLoading(true);
    setError(null);
    const sp = new URLSearchParams({ q: qStr, lang: l, top_k: "25" });
    if (t) sp.set("type", t);
    if (d) sp.set("doc_id", d);
    try {
      const r = await fetch(`/api/search/hybrid?${sp}`);
      if (!r.ok) {
        const j = await r.json().catch(() => ({}));
        setError(j.message ?? `HTTP ${r.status}`);
        setHits([]);
        return;
      }
      const j = (await r.json()) as { hits?: Hit[] };
      setHits(j.hits ?? []);
    } catch (e) {
      setError((e as Error).message);
      setHits([]);
    } finally {
      setLoading(false);
    }
  }

  function submit(e: React.FormEvent) {
    e.preventDefault();
    // Sync URL (shareable)
    const sp = new URLSearchParams(params.toString());
    sp.set("q", q);
    sp.set("lang", lang);
    if (type) sp.set("type", type);
    else sp.delete("type");
    if (docId) sp.set("doc_id", docId);
    else sp.delete("doc_id");
    router.replace(`/search?${sp}`);
    doSearch(q, lang, type, docId);
  }

  return (
    <div>
      <form
        onSubmit={submit}
        className="space-y-3 mb-8 p-4 border border-[rgba(0,255,156,0.15)] bg-[#0a121e] rounded"
      >
        <div className="relative">
          <label className="font-mono text-[10px] uppercase tracking-widest text-[#5a6678] block mb-1">
            query
          </label>
          <input
            value={q}
            onChange={(e) => setQ(e.target.value)}
            placeholder="ex. objetos esféricos avistados em Kansas, MJ-12, Roswell..."
            className="w-full bg-transparent border border-[rgba(0,255,156,0.20)] focus:border-[#00ff9c] rounded px-3 py-2 font-mono text-sm text-[#c8d4e6] outline-none"
            autoFocus
          />
          <SearchAutocomplete query={q} onPick={() => setQ("")} />
        </div>
        <div className="flex flex-wrap items-end gap-3">
          <div>
            <label className="font-mono text-[10px] uppercase tracking-widest text-[#5a6678] block mb-1">
              idioma
            </label>
            <div className="flex gap-1">
              {(["pt", "en"] as const).map((l) => (
                <button
                  key={l}
                  type="button"
                  onClick={() => setLang(l)}
                  className={`px-3 py-1 font-mono text-xs rounded border ${
                    lang === l
                      ? "border-[#00ff9c] text-[#00ff9c] bg-[rgba(0,255,156,0.10)]"
                      : "border-[rgba(127,219,255,0.20)] text-[#8896aa]"
                  }`}
                >
                  {l}
                </button>
              ))}
            </div>
          </div>
          <div>
            <label className="font-mono text-[10px] uppercase tracking-widest text-[#5a6678] block mb-1">
              chunk type
            </label>
            <select
              value={type}
              onChange={(e) => setType(e.target.value)}
              className="bg-[#0a121e] border border-[rgba(0,255,156,0.20)] focus:border-[#00ff9c] rounded px-2 py-1 font-mono text-xs text-[#c8d4e6] outline-none"
            >
              <option value="">qualquer</option>
              {[
                "paragraph",
                "heading",
                "image",
                "stamp",
                "signature",
                "table_marker",
                "address_block",
                "form_field",
                "classification_marking",
                "redaction",
              ].map((t) => (
                <option key={t} value={t}>
                  {t}
                </option>
              ))}
            </select>
          </div>
          <div className="flex-1 min-w-[180px]">
            <label className="font-mono text-[10px] uppercase tracking-widest text-[#5a6678] block mb-1">
              filtrar doc
            </label>
            <input
              value={docId}
              onChange={(e) => setDocId(e.target.value)}
              placeholder="opcional: doc-id exato"
              className="w-full bg-transparent border border-[rgba(0,255,156,0.20)] focus:border-[#00ff9c] rounded px-2 py-1 font-mono text-xs text-[#c8d4e6] outline-none"
            />
          </div>
          <button
            type="submit"
            disabled={!q.trim() || loading}
            className="px-4 py-1.5 font-mono text-xs uppercase tracking-widest border border-[#00ff9c] text-[#00ff9c] bg-[rgba(0,255,156,0.10)] hover:bg-[rgba(0,255,156,0.20)] rounded disabled:opacity-40 disabled:cursor-not-allowed"
          >
            {loading ? "buscando…" : "buscar"}
          </button>
        </div>
      </form>

      {error && (
        <div className="mb-6 p-3 border border-[rgba(255,107,107,0.30)] bg-[rgba(255,107,107,0.05)] rounded font-mono text-xs text-[#ff6b6b]">
          retrieval indisponível: {error}
        </div>
      )}

      <div className="space-y-3">
        {hits.map((h) => {
          const cropUrl = h.bbox
            ? `/api/crop?doc=${encodeURIComponent(h.doc_id)}&page=${h.page}` +
              `&x=${h.bbox.x}&y=${h.bbox.y}&w=${h.bbox.w}&h=${h.bbox.h}&w_px=320`
            : null;
          return (
            <Link
              key={`${h.doc_id}-${h.chunk_id}`}
              href={h.href}
              className="block p-3 bg-[#0a121e] border border-[rgba(127,219,255,0.20)] hover:border-[#00ff9c] rounded transition flex gap-4"
            >
              {cropUrl && (
                <Image
                  src={cropUrl}
                  alt=""
                  width={160}
                  height={100}
                  className="block w-40 h-24 object-cover bg-black rounded flex-shrink-0"
                  unoptimized
                />
              )}
              <div className="min-w-0 flex-1">
                <div className="flex items-center gap-2 text-[10px] font-mono mb-1">
                  <span className="text-[#00ff9c] font-bold">{h.chunk_id}</span>
                  <span className="text-[#5a6678]">p{h.page}</span>
                  <span className="text-[#5a6678]">{h.type}</span>
                  {h.classification && (
                    <span className="text-[#ff6b6b]">{h.classification}</span>
                  )}
                  <span className="ml-auto text-[#8896aa]">{h.score.toFixed(3)}</span>
                </div>
                <p className="text-[#c8d4e6] text-sm line-clamp-3 mb-1">{h.snippet}</p>
                <div className="text-[10px] font-mono text-[#5a6678] truncate">{h.doc_id}</div>
              </div>
            </Link>
          );
        })}
      </div>

      {!loading && !error && initialQ && hits.length === 0 && (
        <div className="text-center text-[#5a6678] font-mono text-sm py-12">
          nenhum resultado
        </div>
      )}
    </div>
  );
}