"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { signIn } from "next-auth/react";

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

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

    const res = await fetch("/api/register", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ name, email, password }),
    });

    if (!res.ok) {
      const data = await res.json().catch(() => ({}));
      setError(data.error ?? "Registration failed");
      setLoading(false);
      return;
    }

    const signInRes = await signIn("credentials", {
      email,
      password,
      redirect: false,
    });

    setLoading(false);

    if (signInRes?.error) {
      setError("Registered, but sign-in failed. Try logging in.");
      return;
    }

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

  return (
    <div className="mx-auto flex min-h-screen max-w-sm flex-col justify-center px-4">
      <h1 className="mb-6 text-2xl font-semibold">Create your agency account</h1>
      <form onSubmit={handleSubmit} className="flex flex-col gap-4">
        <input
          type="text"
          placeholder="Name"
          required
          value={name}
          onChange={(e) => setName(e.target.value)}
          className="rounded-md border border-gray-300 px-3 py-2"
        />
        <input
          type="email"
          placeholder="Email"
          required
          value={email}
          onChange={(e) => setEmail(e.target.value)}
          className="rounded-md border border-gray-300 px-3 py-2"
        />
        <input
          type="password"
          placeholder="Password (min 8 characters)"
          required
          minLength={8}
          value={password}
          onChange={(e) => setPassword(e.target.value)}
          className="rounded-md border border-gray-300 px-3 py-2"
        />
        {error && <p className="text-sm text-red-600">{error}</p>}
        <button
          type="submit"
          disabled={loading}
          className="rounded-md bg-indigo-600 px-3 py-2 text-white disabled:opacity-50"
        >
          {loading ? "Creating account..." : "Create account"}
        </button>
      </form>
      <p className="mt-4 text-sm text-gray-600">
        Already have an account?{" "}
        <a href="/login" className="text-indigo-600 underline">
          Log in
        </a>
      </p>
    </div>
  );
}