"use client";

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

const inputCls = "w-full bg-white/[0.04] border border-white/[0.1] rounded-xl px-4 py-3 text-sm text-white placeholder:text-slate-600 focus:outline-none focus:ring-2 focus:ring-indigo-500/50 focus:border-indigo-500/50 transition-all";

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

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault();
    setError(""); setLoading(true);
    const result = await signIn("credentials", { email, password, redirect: false });
    setLoading(false);
    if (result?.error) setError("Email sau parola incorecta.");
    else router.push("/dashboard");
  }

  return (
    <div className="w-full max-w-sm">
      <div className="mb-8">
        <h1 className="text-2xl font-bold text-white mb-1">Bine ai revenit!</h1>
        <p className="text-slate-500 text-sm">Conecteaza-te la contul tau Dialpilot.</p>
      </div>

      {error && (
        <div className="bg-red-500/10 border border-red-500/20 text-red-400 text-sm rounded-xl px-4 py-3 mb-5">
          {error}
        </div>
      )}

      <form onSubmit={handleSubmit} className="space-y-4">
        <div>
          <label className="block text-xs font-semibold text-slate-400 mb-2 uppercase tracking-wide">Email</label>
          <input type="email" value={email} onChange={e => setEmail(e.target.value)} required className={inputCls} placeholder="tu@exemplu.com" />
        </div>
        <div>
          <label className="block text-xs font-semibold text-slate-400 mb-2 uppercase tracking-wide">Parola</label>
          <input type="password" value={password} onChange={e => setPassword(e.target.value)} required className={inputCls} placeholder="••••••••" />
        </div>
        <button type="submit" disabled={loading}
          className="w-full bg-gradient-to-r from-indigo-600 to-violet-600 hover:from-indigo-500 hover:to-violet-500 text-white py-3 rounded-xl font-bold text-sm transition-all shadow-lg shadow-indigo-500/20 disabled:opacity-50 mt-2">
          {loading ? "Se conecteaza..." : "Conectare"}
        </button>
      </form>

      <div className="flex items-center gap-3 my-5">
        <div className="flex-1 h-px bg-white/[0.06]" />
        <span className="text-xs text-slate-600">sau</span>
        <div className="flex-1 h-px bg-white/[0.06]" />
      </div>

      <button
        onClick={() => signIn("google", { callbackUrl: "/dashboard" })}
        className="w-full flex items-center justify-center gap-2.5 border border-white/[0.08] hover:border-white/[0.15] bg-white/[0.03] hover:bg-white/[0.06] text-slate-300 py-3 rounded-xl text-sm font-medium transition-all"
      >
        <svg className="w-4 h-4" 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>
        Continua cu Google
      </button>

      <p className="text-center text-sm text-slate-500 mt-6">
        Nu ai cont?{" "}
        <Link href="/register" className="text-indigo-400 hover:text-indigo-300 font-semibold transition-colors">
          Inregistrare gratuita
        </Link>
      </p>
    </div>
  );
}