"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import Link from "next/link";
import { signUp } from "@/lib/auth-client";

export default function RegisterPage() {
  const router = useRouter();
  const [name, setName] = useState("");
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  async function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
    e.preventDefault();
    setLoading(true);
    setError(null);

    const { error: signUpError } = await signUp.email({
      email,
      password,
      name,
      callbackURL: "/me",
    });

    if (signUpError) {
      setError(signUpError.message ?? "Đăng ký không thành công");
      setLoading(false);
      return;
    }

    router.push("/me");
    router.refresh();
  }

  return (
    <div className="mx-auto flex min-h-screen w-full max-w-md flex-col justify-center px-4 py-16">
      <div className="rounded-2xl border border-stone-800 bg-stone-950/60 p-8 shadow-2xl backdrop-blur">
        <h1 className="font-serif text-3xl font-semibold text-stone-100">Đăng ký</h1>
        <p className="mt-2 text-sm text-stone-400">
          Tạo tài khoản để lưu lá số của bạn và gia đình
        </p>

        <form onSubmit={handleSubmit} className="mt-6 space-y-4">
          <div>
            <label htmlFor="name" className="mb-1.5 block text-sm text-stone-300">
              Họ tên
            </label>
            <input
              id="name"
              type="text"
              required
              value={name}
              onChange={(e) => setName(e.target.value)}
              className="w-full rounded-md border border-stone-700 bg-stone-900 px-4 py-2.5 text-stone-100 placeholder:text-stone-500 focus:border-amber-500 focus:ring-2 focus:ring-amber-500/20 focus:outline-none"
              placeholder="Nguyễn Văn A"
              autoComplete="name"
            />
          </div>

          <div>
            <label htmlFor="email" className="mb-1.5 block text-sm text-stone-300">
              Email
            </label>
            <input
              id="email"
              type="email"
              required
              value={email}
              onChange={(e) => setEmail(e.target.value)}
              className="w-full rounded-md border border-stone-700 bg-stone-900 px-4 py-2.5 text-stone-100 placeholder:text-stone-500 focus:border-amber-500 focus:ring-2 focus:ring-amber-500/20 focus:outline-none"
              placeholder="ban@example.com"
              autoComplete="email"
            />
          </div>

          <div>
            <label htmlFor="password" className="mb-1.5 block text-sm text-stone-300">
              Mật khẩu
            </label>
            <input
              id="password"
              type="password"
              required
              minLength={8}
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              className="w-full rounded-md border border-stone-700 bg-stone-900 px-4 py-2.5 text-stone-100 placeholder:text-stone-500 focus:border-amber-500 focus:ring-2 focus:ring-amber-500/20 focus:outline-none"
              placeholder="Tối thiểu 8 ký tự"
              autoComplete="new-password"
            />
          </div>

          {error ? (
            <div className="rounded-md border border-red-900 bg-red-950/40 px-3 py-2 text-sm text-red-300">
              {error}
            </div>
          ) : null}

          <button
            type="submit"
            disabled={loading}
            className="w-full rounded-md bg-amber-500 py-3 font-semibold text-stone-950 transition hover:brightness-105 disabled:cursor-not-allowed disabled:opacity-60"
          >
            {loading ? "Đang xử lý…" : "Tạo tài khoản"}
          </button>
        </form>

        <p className="mt-6 text-center text-sm text-stone-400">
          Đã có tài khoản?{" "}
          <Link href="/login" className="text-amber-400 hover:text-amber-300">
            Đăng nhập
          </Link>
        </p>
      </div>
    </div>
  );
}