"use client";

import { Search } from "lucide-react";
import { useRouter } from "next/navigation";
import { useState } from "react";

export default function SearchBox({ tag }: { tag?: string | null }) {
  const [query, setQuery] = useState("");
  const router = useRouter();

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    const trimmed = query.trim();
    if (!trimmed) return;
    const params = new URLSearchParams({ q: trimmed });
    if (tag) params.set("tag", tag);
    router.push(`/search?${params.toString()}`);
  };

  return (
    <form onSubmit={handleSubmit} className="relative w-full">
      <input
        type="text"
        value={query}
        onChange={(e) => setQuery(e.target.value)}
        placeholder="搜索视频、图文描述或语音内容..."
        className="w-full bg-white/80 dark:bg-zinc-800/80 border border-zinc-300 dark:border-zinc-700 rounded-full px-5 py-3 pl-12 pr-12 text-zinc-900 dark:text-white placeholder-zinc-500 dark:placeholder-zinc-400 focus:outline-none focus:ring-2 focus:ring-blue-500/50 focus:border-blue-500 transition-all shadow-sm"
      />
      <Search
        size={20}
        className="absolute left-4 top-1/2 -translate-y-1/2 text-zinc-500 dark:text-zinc-400"
      />
      <button
        type="submit"
        className="absolute right-2 top-1/2 -translate-y-1/2 px-4 py-1.5 bg-blue-600 hover:bg-blue-700 text-white text-sm rounded-full font-medium transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
        disabled={!query.trim()}
      >
        搜索
      </button>
    </form>
  );
}