import React from 'react';
import { useTranslation } from 'react-i18next';
import { Globe } from 'lucide-react';

// SVG Flag Components
const GBFlag: React.FC<{ className?: string }> = ({ className = "w-5 h-5" }) => (
  <svg className={className} viewBox="0 0 640 480" xmlns="http://www.w3.org/2000/svg">
    <path fill="#012169" d="M0 0h640v480H0z"/>
    <path fill="#FFF" d="m75 0 244 181L562 0h78v62L400 241l240 178v61h-80L320 301 81 480H0v-60l239-178L0 64V0h75z"/>
    <path fill="#C8102E" d="m424 281 216 159v40L369 281h55zm-184 20 6 35L54 480H0l240-179zM640 0v3L391 191l2-44L590 0h50zM0 0l239 176h-60L0 42V0z"/>
    <path fill="#FFF" d="M241 0v480h160V0H241zM0 160v160h640V160H0z"/>
    <path fill="#C8102E" d="M0 193v96h640v-96H0zM273 0v480h96V0h-96z"/>
  </svg>
);

const DEFlag: React.FC<{ className?: string }> = ({ className = "w-5 h-5" }) => (
  <svg className={className} viewBox="0 0 640 480" xmlns="http://www.w3.org/2000/svg">
    <path fill="#000" d="M0 0h640v160H0z"/>
    <path fill="#D00" d="M0 160h640v160H0z"/>
    <path fill="#FFCE00" d="M0 320h640v160H0z"/>
  </svg>
);

const RUFlag: React.FC<{ className?: string }> = ({ className = "w-5 h-5" }) => (
  <svg className={className} viewBox="0 0 640 480" xmlns="http://www.w3.org/2000/svg">
    <path fill="#FFF" d="M0 0h640v160H0z"/>
    <path fill="#0039A6" d="M0 160h640v160H0z"/>
    <path fill="#D52B1E" d="M0 320h640v160H0z"/>
  </svg>
);

const PTBRFlag: React.FC<{ className?: string }> = ({ className = "w-5 h-5" }) => (
  <svg className={className} viewBox="0 0 640 480" xmlns="http://www.w3.org/2000/svg">
    <path fill="#009B3A" d="M0 0h640v480H0z"/>
    <path fill="#FEDF00" d="M320 39.4 590.4 240 320 440.6 49.6 240z"/>
    <circle fill="#002776" cx="320" cy="240" r="95"/>
    <path fill="#FFF" d="M226.3 262.8c0-27 12.8-51 32.7-66.3a95.3 95.3 0 0 0-3.5 120.6c-17.8-14.8-29.2-37-29.2-54.3z" opacity=".5"/>
  </svg>
);

const NLFlag: React.FC<{ className?: string }> = ({ className = "w-5 h-5" }) => (
  <svg className={className} viewBox="0 0 640 480" xmlns="http://www.w3.org/2000/svg">
    <path fill="#AE1C28" d="M0 0h640v160H0z"/>
    <path fill="#FFF" d="M0 160h640v160H0z"/>
    <path fill="#21468B" d="M0 320h640v160H0z"/>
  </svg>
);

const FRFlag: React.FC<{ className?: string }> = ({ className = "w-5 h-5" }) => (
  <svg className={className} viewBox="0 0 640 480" xmlns="http://www.w3.org/2000/svg">
    <path fill="#002395" d="M0 0h213.3v480H0z"/>
    <path fill="#fff" d="M213.3 0h213.4v480H213.3z"/>
    <path fill="#ED2939" d="M426.7 0H640v480H426.7z"/>
  </svg>
);

const ESFlag: React.FC<{ className?: string }> = ({ className = "w-5 h-5" }) => (
  <svg className={className} viewBox="0 0 640 480" xmlns="http://www.w3.org/2000/svg">
    <path fill="#AA151B" d="M0 0h640v120H0z"/>
    <path fill="#F1BF00" d="M0 120h640v240H0z"/>
    <path fill="#AA151B" d="M0 360h640v120H0z"/>
  </svg>
);

export const SUPPORTED_LANGUAGES = [
  { code: 'en', name: 'English', Flag: GBFlag },
  { code: 'de', name: 'Deutsch', Flag: DEFlag },
  { code: 'ru', name: 'Русский', Flag: RUFlag },
  { code: 'pt', name: 'Português', Flag: PTBRFlag },
  { code: 'nl', name: 'Nederlands', Flag: NLFlag },
  { code: 'fr', name: 'Français', Flag: FRFlag },
  { code: 'es', name: 'Español', Flag: ESFlag },
];

export const LanguageSelector: React.FC = () => {
  const { i18n } = useTranslation();
  const [isOpen, setIsOpen] = React.useState(false);

  const currentLanguage = SUPPORTED_LANGUAGES.find(lang => lang.code === i18n.language) || SUPPORTED_LANGUAGES[0];

  const handleLanguageChange = (languageCode: string) => {
    i18n.changeLanguage(languageCode);
    setIsOpen(false);
  };

  return (
    <div className="relative">
      <button
        onClick={() => setIsOpen(!isOpen)}
        className="flex items-center gap-2 px-2 sm:px-3 py-2 text-sm font-medium text-neutral-700 dark:text-neutral-200 bg-white dark:bg-neutral-800 border border-neutral-300 dark:border-neutral-600 rounded-lg hover:bg-neutral-50 dark:hover:bg-neutral-700 focus:outline-none focus:ring-2 focus:ring-primary-500"
        // On <sm the language *name* is hidden — the Globe + flag pair
        // is enough recognition on its own and stops this control from
        // pushing into the company-name title on narrow mobile widths
        // (#523). Full name stays on sm+ where there's room.
        aria-label={currentLanguage.name}
        title={currentLanguage.name}
      >
        <Globe className="w-4 h-4" />
        <currentLanguage.Flag className="w-5 h-5" />
        <span className="hidden sm:inline">{currentLanguage.name}</span>
      </button>

      {isOpen && (
        <div className="absolute right-0 mt-2 w-48 bg-white dark:bg-neutral-800 rounded-lg shadow-lg border border-neutral-200 dark:border-neutral-700 py-1 z-50">
          {SUPPORTED_LANGUAGES.map((language) => (
            <button
              key={language.code}
              onClick={() => handleLanguageChange(language.code)}
              className={`w-full text-left px-4 py-2 text-sm hover:bg-neutral-50 dark:hover:bg-neutral-700 flex items-center gap-3 ${
                language.code === i18n.language
                  ? 'text-accent bg-accent-dark/15'
                  : 'text-neutral-700 dark:text-neutral-300'
              }`}
            >
              <language.Flag className="w-5 h-5" />
              <span>{language.name}</span>
            </button>
          ))}
        </div>
      )}
    </div>
  );
};

LanguageSelector.displayName = 'LanguageSelector';