"use client";

import { useState, type FormEvent } from "react";

const fieldClass =
  "w-full rounded-2xl border border-anouma-taupe/30 bg-white px-5 py-3 text-base text-anouma-plum placeholder:text-anouma-plum/50 focus:border-anouma-mauve-dark focus:outline-none";

export function RegisterForm({ slug }: { slug: string }) {
  const [name, setName] = useState("");
  const [email, setEmail] = useState("");
  const [status, setStatus] = useState<"idle" | "loading" | "done" | "error">("idle");
  const [error, setError] = useState<string | null>(null);

  async function handleSubmit(e: FormEvent<HTMLFormElement>) {
    e.preventDefault();
    setStatus("loading");
    setError(null);
    try {
      const res = await fetch(`/api/meetings/${slug}/register`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ name, email }),
      });
      const data = await res.json();
      if (!res.ok) {
        setError(data.error || "Anmeldung leider nicht möglich.");
        setStatus("error");
        return;
      }
      setStatus("done");
    } catch {
      setError("Verbindung fehlgeschlagen. Bitte versuche es erneut.");
      setStatus("error");
    }
  }

  if (status === "done") {
    return (
      <p className="rounded-2xl bg-anouma-cream-light p-5 text-sm leading-relaxed text-anouma-plum" role="status">
        Danke für deine Anmeldung — wir freuen uns auf dich!
      </p>
    );
  }

  return (
    <form onSubmit={handleSubmit} className="space-y-4">
      <div>
        <label htmlFor="reg-name" className="mb-1.5 block text-sm font-medium text-anouma-plum">
          Name
        </label>
        <input
          id="reg-name"
          type="text"
          required
          value={name}
          onChange={(e) => setName(e.target.value)}
          className={fieldClass}
          autoComplete="name"
        />
      </div>
      <div>
        <label htmlFor="reg-email" className="mb-1.5 block text-sm font-medium text-anouma-plum">
          E-Mail
        </label>
        <input
          id="reg-email"
          type="email"
          required
          value={email}
          onChange={(e) => setEmail(e.target.value)}
          className={fieldClass}
          autoComplete="email"
        />
      </div>
      {error && (
        <p role="alert" className="text-sm text-red-700">
          {error}
        </p>
      )}
      <button
        type="submit"
        disabled={status === "loading"}
        className="rounded-full bg-anouma-mauve-dark px-6 py-3 text-sm font-medium text-white transition-colors duration-300 hover:bg-anouma-plum disabled:opacity-60"
      >
        {status === "loading" ? "Wird gesendet …" : "Zum Termin anmelden"}
      </button>
    </form>
  );
}