'use client';

import { useActionState } from 'react';
import { useFormStatus } from 'react-dom';
import { register } from '@/app/actions/register';
import Link from 'next/link';
import { Mail, Lock, User, ArrowRight, Sparkles } from 'lucide-react';
import { useLanguage } from '@/lib/i18n';
import { GoogleSignInButton } from '@/components/google-sign-in-button';

function RegisterButton() {
  const { pending } = useFormStatus();
  const { t } = useLanguage();
  return (
    <button
      type="submit"
      disabled={pending}
      className="w-full bg-[var(--foreground)] text-[var(--background)] py-4 rounded-2xl font-bold uppercase tracking-[0.2em] text-[10px] flex items-center justify-center gap-3 transition-all hover:shadow-xl hover:shadow-black/10 active:scale-[0.98] disabled:opacity-50 mt-4"
    >
      {pending ? (
        <Sparkles size={16} className="animate-spin" />
      ) : (
        <>
          {t('auth.signUp')}
          <ArrowRight size={14} />
        </>
      )}
    </button>
  );
}

function AuthDivider({ label }: { label: string }) {
  return (
    <div className="relative flex items-center py-2">
      <div className="flex-grow border-t border-[var(--border)]" />
      <span className="mx-4 text-[10px] uppercase tracking-widest text-[var(--muted-foreground)] font-bold">
        {label}
      </span>
      <div className="flex-grow border-t border-[var(--border)]" />
    </div>
  );
}

export function RegisterForm({ googleAuthEnabled = false }: { googleAuthEnabled?: boolean }) {
  const [errorMessage, dispatch] = useActionState(register, undefined);
  const { t } = useLanguage();

  return (
    <div className="bg-white dark:bg-[var(--background)]/50 border border-[var(--border)] p-8 md:p-10 rounded-[48px] shadow-2xl">
      <div className="space-y-8">
        <div className="text-center space-y-2">
          <h1 className="text-2xl md:text-3xl font-serif font-bold">
            {t('auth.createYourSpace')}
          </h1>
          <p className="text-[var(--muted-foreground)] text-sm font-light">
            {t('auth.createYourSpaceSubtitle')}
          </p>
        </div>

        {googleAuthEnabled && (
          <>
            <GoogleSignInButton label={t('auth.continueWithGoogle')} />
            <AuthDivider label={t('auth.orContinueWith')} />
          </>
        )}

        <form action={dispatch} className="space-y-4">
          <div className="space-y-1.5">
            <label htmlFor="name" className="text-[10px] uppercase tracking-widest font-bold text-[var(--muted-foreground)] px-4">
              {t('auth.name')}
            </label>
            <div className="relative group">
              <div className="absolute left-4 top-1/2 -translate-y-1/2 text-[var(--muted-foreground)] group-focus-within:text-[var(--color-brand-accent)] transition-colors">
                <User size={16} />
              </div>
              <input
                className="w-full bg-slate-50 dark:bg-white/5 border border-[var(--border)] rounded-2xl py-4 pl-12 pr-4 text-sm outline-none focus:border-[var(--color-brand-accent)] focus:ring-4 ring-[var(--color-brand-accent)]/5 transition-all"
                id="name"
                type="text"
                name="name"
                autoComplete="name"
                placeholder={t('auth.namePlaceholder')}
                required
              />
            </div>
          </div>

          <div className="space-y-1.5">
            <label htmlFor="email" className="text-[10px] uppercase tracking-widest font-bold text-[var(--muted-foreground)] px-4">
              {t('auth.email')}
            </label>
            <div className="relative group">
              <div className="absolute left-4 top-1/2 -translate-y-1/2 text-[var(--muted-foreground)] group-focus-within:text-[var(--color-brand-accent)] transition-colors">
                <Mail size={16} />
              </div>
              <input
                className="w-full bg-slate-50 dark:bg-white/5 border border-[var(--border)] rounded-2xl py-4 pl-12 pr-4 text-sm outline-none focus:border-[var(--color-brand-accent)] focus:ring-4 ring-[var(--color-brand-accent)]/5 transition-all"
                id="email"
                type="email"
                name="email"
                autoComplete="email"
                placeholder={t('auth.emailPlaceholder')}
                required
              />
            </div>
          </div>

          <div className="space-y-1.5">
            <label htmlFor="password" className="text-[10px] uppercase tracking-widest font-bold text-[var(--muted-foreground)] px-4">
              {t('auth.password')}
            </label>
            <div className="relative group">
              <div className="absolute left-4 top-1/2 -translate-y-1/2 text-[var(--muted-foreground)] group-focus-within:text-[var(--color-brand-accent)] transition-colors">
                <Lock size={16} />
              </div>
              <input
                className="w-full bg-slate-50 dark:bg-white/5 border border-[var(--border)] rounded-2xl py-4 pl-12 pr-4 text-sm outline-none focus:border-[var(--color-brand-accent)] focus:ring-4 ring-[var(--color-brand-accent)]/5 transition-all"
                id="password"
                type="password"
                name="password"
                autoComplete="new-password"
                placeholder={t('auth.passwordMinChars')}
                required
                minLength={6}
              />
            </div>
          </div>

          <div className="space-y-1.5">
            <label htmlFor="confirmPassword" className="text-[10px] uppercase tracking-widest font-bold text-[var(--muted-foreground)] px-4">
              {t('auth.confirmPassword')}
            </label>
            <div className="relative group">
              <div className="absolute left-4 top-1/2 -translate-y-1/2 text-[var(--muted-foreground)] group-focus-within:text-[var(--color-brand-accent)] transition-colors">
                <Lock size={16} />
              </div>
              <input
                className="w-full bg-slate-50 dark:bg-white/5 border border-[var(--border)] rounded-2xl py-4 pl-12 pr-4 text-sm outline-none focus:border-[var(--color-brand-accent)] focus:ring-4 ring-[var(--color-brand-accent)]/5 transition-all"
                id="confirmPassword"
                type="password"
                name="confirmPassword"
                autoComplete="new-password"
                placeholder={t('auth.confirmPasswordPlaceholder')}
                required
                minLength={6}
              />
            </div>
          </div>

          <RegisterButton />

          <div
            className="flex h-8 items-end space-x-1"
            aria-live="polite"
            aria-atomic="true"
          >
            {errorMessage && (
              <p className="text-sm text-red-500">{errorMessage}</p>
            )}
          </div>
        </form>

        <div className="text-center pt-2">
          <p className="text-xs text-[var(--muted-foreground)]">
            {t('auth.hasAccount')}{' '}
            <Link
              href="/login"
              className="text-[var(--color-brand-accent)] font-bold hover:underline"
            >
              {t('auth.signIn')}
            </Link>
          </p>
        </div>
      </div>
    </div>
  );
}