"use client";

import { signIn } from "next-auth/react";
import { useState, FormEvent } from "react";
import { useRouter } from "next/navigation";
import Link from "next/link";

export default function LoginPage() {
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [error, setError] = useState("");
  const [loading, setLoading] = useState(false);
  const router = useRouter();

  const handleSubmit = async (e: FormEvent<HTMLFormElement>) => {
    e.preventDefault();
    setError("");
    setLoading(true);

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

      if (result?.error) {
        setError("Giriş başarısız. Email veya şifrenizi kontrol edin. Hesabınızı aktifleştirdiğinizden emin olun.");
      } else if (result?.ok) {
        router.push("/dashboard");
        router.refresh();
      }
    } catch {
      setError("Bir hata oluştu. Lütfen tekrar deneyin.");
    } finally {
      setLoading(false);
    }
  };

  const handleSocialLogin = async (provider: "google" | "github") => {
    setError("");
    try {
      await signIn(provider, {
        callbackUrl: "/dashboard",
      });
    } catch {
      setError(`${provider === "google" ? "Google" : "GitHub"} ile giriş başarısız.`);
    }
  };

  return (
    <div className="min-h-screen flex items-center justify-center bg-gray-50 py-12 px-4 sm:px-6 lg:px-8">
      <div className="max-w-md w-full space-y-8">
        <div>
          <h2 className="mt-6 text-center text-3xl font-bold text-gray-900">
            Hesabınıza Giriş Yapın
          </h2>
          <p className="mt-2 text-center text-sm text-gray-600">
            Veya{" "}
            <Link
              href="/auth/register"
              className="font-medium text-blue-600 hover:text-blue-500"
            >
              yeni hesap oluşturun
            </Link>
          </p>
        </div>

        {/* Social Login Buttons */}
        <div className="space-y-3">
          <button
            type="button"
            onClick={() => handleSocialLogin("google")}
            className="w-full flex items-center justify-center gap-3 py-2 px-4 border border-gray-300 rounded-md shadow-sm bg-white text-sm font-medium text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
          >
            <svg className="w-5 h-5" viewBox="0 0 24 24">
              <path
                fill="#4285F4"
                d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"
              />
              <path
                fill="#34A853"
                d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"
              />
              <path
                fill="#FBBC05"
                d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"
              />
              <path
                fill="#EA4335"
                d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"
              />
            </svg>
            Google ile Giriş Yap
          </button>

          <button
            type="button"
            onClick={() => handleSocialLogin("github")}
            className="w-full flex items-center justify-center gap-3 py-2 px-4 border border-gray-300 rounded-md shadow-sm bg-white text-sm font-medium text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
          >
            <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 24 24">
              <path
                fillRule="evenodd"
                d="M12 2C6.477 2 2 6.484 2 12.017c0 4.425 2.865 8.18 6.839 9.504.5.092.682-.217.682-.483 0-.237-.008-.868-.013-1.703-2.782.605-3.369-1.343-3.369-1.343-.454-1.158-1.11-1.466-1.11-1.466-.908-.62.069-.608.069-.608 1.003.07 1.531 1.032 1.531 1.032.892 1.53 2.341 1.088 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.113-4.555-4.951 0-1.093.39-1.988 1.029-2.688-.103-.253-.446-1.272.098-2.65 0 0 .84-.27 2.75 1.026A9.564 9.564 0 0112 6.844c.85.004 1.705.115 2.504.337 1.909-1.296 2.747-1.027 2.747-1.027.546 1.379.202 2.398.1 2.651.64.7 1.028 1.595 1.028 2.688 0 3.848-2.339 4.695-4.566 4.943.359.309.678.92.678 1.855 0 1.338-.012 2.419-.012 2.747 0 .268.18.58.688.482A10.019 10.019 0 0022 12.017C22 6.484 17.522 2 12 2z"
                clipRule="evenodd"
              />
            </svg>
            GitHub ile Giriş Yap
          </button>
        </div>

        <div className="relative">
          <div className="absolute inset-0 flex items-center">
            <div className="w-full border-t border-gray-300" />
          </div>
          <div className="relative flex justify-center text-sm">
            <span className="px-2 bg-gray-50 text-gray-500">Veya email ile</span>
          </div>
        </div>

        {/* Email/Password Form */}
        <form className="mt-8 space-y-6" onSubmit={handleSubmit}>
          <div className="rounded-md shadow-sm space-y-4">
            <div>
              <label htmlFor="email" className="block text-sm font-medium text-gray-700 mb-1">
                Email adresi
              </label>
              <input
                id="email"
                name="email"
                type="email"
                autoComplete="email"
                required
                className="appearance-none relative block w-full px-3 py-2 border border-gray-300 placeholder-gray-500 text-gray-900 rounded-md focus:outline-none focus:ring-blue-500 focus:border-blue-500 sm:text-sm"
                placeholder="ornek@email.com"
                value={email}
                onChange={(e) => setEmail(e.target.value)}
              />
            </div>
            <div>
              <label htmlFor="password" className="block text-sm font-medium text-gray-700 mb-1">
                Şifre
              </label>
              <input
                id="password"
                name="password"
                type="password"
                autoComplete="current-password"
                required
                className="appearance-none relative block w-full px-3 py-2 border border-gray-300 placeholder-gray-500 text-gray-900 rounded-md focus:outline-none focus:ring-blue-500 focus:border-blue-500 sm:text-sm"
                placeholder="Şifreniz"
                value={password}
                onChange={(e) => setPassword(e.target.value)}
              />
            </div>
          </div>

          <div className="flex items-center justify-between">
            <div className="text-sm">
              <Link
                href="/auth/resend-activation"
                className="font-medium text-blue-600 hover:text-blue-500"
              >
                Aktivasyon emaili tekrar gönder
              </Link>
            </div>
            <div className="text-sm">
              <Link
                href="/auth/password-reset"
                className="font-medium text-blue-600 hover:text-blue-500"
              >
                Şifremi unuttum
              </Link>
            </div>
          </div>

          {error && (
            <div className="rounded-md bg-red-50 p-4">
              <p className="text-sm text-red-800">{error}</p>
            </div>
          )}

          <div>
            <button
              type="submit"
              disabled={loading}
              className="group relative w-full flex justify-center py-2 px-4 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed"
            >
              {loading ? "Giriş yapılıyor..." : "Giriş Yap"}
            </button>
          </div>
        </form>
      </div>
    </div>
  );
}