"use client";

import { useState, useEffect } from "react";
import { useRouter } from "next/navigation";
import Link from "next/link";

export default function RegisterPage() {
  const [name, setName] = useState("");
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [confirmPassword, setConfirmPassword] = useState("");
  const [error, setError] = useState("");
  const [loading, setLoading] = useState(false);
  const [registerEnabled, setRegisterEnabled] = useState(true);
  const [checking, setChecking] = useState(true);
  const router = useRouter();

  useEffect(() => {
    const checkRegisterEnabled = async () => {
      try {
        const response = await fetch("/api/config");
        const data = await response.json();
        setRegisterEnabled(data.registerEnabled);
        if (!data.registerEnabled) {
          router.push("/login");
        }
      } catch (error) {
        console.error("Config kontrolü başarısız:", error);
      } finally {
        setChecking(false);
      }
    };

    checkRegisterEnabled();
  }, [router]);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setError("");

    // Şifre kontrolü
    if (password !== confirmPassword) {
      setError("Şifreler eşleşmiyor");
      return;
    }

    if (password.length < 6) {
      setError("Şifre en az 6 karakter olmalıdır");
      return;
    }

    setLoading(true);

    try {
      const response = await fetch("/api/auth/sign-up/email", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        credentials: "include",
        body: JSON.stringify({
          name,
          email,
          password,
        }),
      });

      const data = await response.json();

      if (!response.ok) {
        throw new Error(data.message || "Kayıt başarısız");
      }

      router.push("/profile");
      router.refresh();
    } catch (err: any) {
      setError(err.message || "Bir hata oluştu");
    } finally {
      setLoading(false);
    }
  };

  if (checking) {
    return (
      <div className="flex min-h-screen items-center justify-center bg-zinc-50 dark:bg-black">
        <div className="text-lg text-gray-600 dark:text-gray-400">
          Yükleniyor...
        </div>
      </div>
    );
  }

  if (!registerEnabled) {
    return null;
  }

  return (
    <div className="flex min-h-screen items-center justify-center bg-zinc-50 dark:bg-black">
      <div className="w-full max-w-md space-y-8 rounded-lg bg-white p-8 shadow-lg dark:bg-zinc-900">
        <div>
          <h2 className="text-center text-3xl font-bold text-black dark:text-zinc-50">
            Kayıt Ol
          </h2>
        </div>
        <form className="mt-8 space-y-6" onSubmit={handleSubmit}>
          {error && (
            <div className="rounded-md bg-red-50 p-3 text-sm text-red-800 dark:bg-red-900/20 dark:text-red-400">
              {error}
            </div>
          )}
          <div className="space-y-4">
            <div>
              <label
                htmlFor="name"
                className="block text-sm font-medium text-gray-700 dark:text-gray-300"
              >
                Ad Soyad
              </label>
              <input
                id="name"
                name="name"
                type="text"
                required
                value={name}
                onChange={(e) => setName(e.target.value)}
                className="mt-1 block w-full rounded-md border border-gray-300 px-3 py-2 shadow-sm focus:border-blue-500 focus:outline-none focus:ring-blue-500 dark:border-gray-600 dark:bg-zinc-800 dark:text-white"
                placeholder="Adınız Soyadınız"
              />
            </div>
            <div>
              <label
                htmlFor="email"
                className="block text-sm font-medium text-gray-700 dark:text-gray-300"
              >
                E-posta
              </label>
              <input
                id="email"
                name="email"
                type="email"
                required
                value={email}
                onChange={(e) => setEmail(e.target.value)}
                className="mt-1 block w-full rounded-md border border-gray-300 px-3 py-2 shadow-sm focus:border-blue-500 focus:outline-none focus:ring-blue-500 dark:border-gray-600 dark:bg-zinc-800 dark:text-white"
                placeholder="ornek@email.com"
              />
            </div>
            <div>
              <label
                htmlFor="password"
                className="block text-sm font-medium text-gray-700 dark:text-gray-300"
              >
                Şifre
              </label>
              <input
                id="password"
                name="password"
                type="password"
                required
                value={password}
                onChange={(e) => setPassword(e.target.value)}
                className="mt-1 block w-full rounded-md border border-gray-300 px-3 py-2 shadow-sm focus:border-blue-500 focus:outline-none focus:ring-blue-500 dark:border-gray-600 dark:bg-zinc-800 dark:text-white"
                placeholder="••••••••"
              />
            </div>
            <div>
              <label
                htmlFor="confirmPassword"
                className="block text-sm font-medium text-gray-700 dark:text-gray-300"
              >
                Şifre Tekrar
              </label>
              <input
                id="confirmPassword"
                name="confirmPassword"
                type="password"
                required
                value={confirmPassword}
                onChange={(e) => setConfirmPassword(e.target.value)}
                className="mt-1 block w-full rounded-md border border-gray-300 px-3 py-2 shadow-sm focus:border-blue-500 focus:outline-none focus:ring-blue-500 dark:border-gray-600 dark:bg-zinc-800 dark:text-white"
                placeholder="••••••••"
              />
            </div>
          </div>

          <div>
            <button
              type="submit"
              disabled={loading}
              className="w-full rounded-md bg-blue-600 px-4 py-2 text-white hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 disabled:opacity-50"
            >
              {loading ? "Kayıt yapılıyor..." : "Kayıt Ol"}
            </button>
          </div>

          <div className="text-center text-sm">
            <span className="text-gray-600 dark:text-gray-400">
              Zaten hesabınız var mı?{" "}
            </span>
            <Link
              href="/login"
              className="font-medium text-blue-600 hover:text-blue-500 dark:text-blue-400"
            >
              Giriş Yap
            </Link>
          </div>
        </form>
      </div>
    </div>
  );
}