/**
 * Polderfest 2027 — chat pagina
 * --------------------------------------------------
 * Les 11 — useChat hook + Tailwind chat UI.
 * Plaats dit bestand op: app/chat/page.tsx
 *
 * Werking:
 *   - useChat() regelt messages, input, submit-handler, streaming
 *   - Praat met /api/chat (de route.ts)
 *   - Disabled tijdens streaming
 *
 * Vereist:
 *   - app/api/chat/route.ts (zie route.ts)
 *   - npm i ai
 *   - Tailwind aanwezig in project (standaard in create-next-app)
 */

"use client";

import { useChat } from "ai/react";

export default function ChatPage() {
  const { messages, input, handleInputChange, handleSubmit, status } =
    useChat();

  return (
    <main className="max-w-2xl mx-auto p-6 flex flex-col h-screen">
      <h1 className="text-2xl font-bold mb-4">
        Polderfest 2027 — vraag de AI
      </h1>

      <div className="flex-1 overflow-y-auto space-y-4 mb-4">
        {messages.map((m) => (
          <div
            key={m.id}
            className={
              m.role === "user"
                ? "bg-blue-50 p-3 rounded-lg ml-12"
                : "bg-gray-50 p-3 rounded-lg mr-12"
            }
          >
            <div className="font-medium text-sm text-gray-500 mb-1">
              {m.role === "user" ? "Jij" : "Festival AI"}
            </div>
            <div className="whitespace-pre-wrap">{m.content}</div>
          </div>
        ))}
      </div>

      <form onSubmit={handleSubmit} className="flex gap-2">
        <input
          value={input}
          onChange={handleInputChange}
          placeholder="Stel een vraag over de line-up..."
          className="flex-1 p-3 border rounded-lg"
          disabled={status !== "ready"}
        />
        <button
          type="submit"
          disabled={status !== "ready"}
          className="px-6 py-3 bg-blue-600 text-white rounded-lg disabled:opacity-50"
        >
          Stuur
        </button>
      </form>
    </main>
  );
}