/**
 * Language definitions and metadata
 */

/**
 * Supported language codes
 */
export type LanguageCode =
	| 'en'
	| 'de'
	| 'fr'
	| 'es'
	| 'it'
	| 'pt'
	| 'nl'
	| 'pl'
	| 'ru'
	| 'ja'
	| 'ko'
	| 'zh'
	| 'ar'
	| 'hi'
	| 'bn'
	| 'ur'
	| 'id'
	| 'fa'
	| 'vi'
	| 'th'
	| 'tr'
	| 'uk'
	| 'cs'
	| 'da'
	| 'fi'
	| 'sv'
	| 'nb'
	| 'el'
	| 'hu'
	| 'ro'
	| 'bg'
	| 'hr'
	| 'sk'
	| 'sl'
	| 'sr'
	| 'lt'
	| 'lv'
	| 'et'
	| 'mt'
	| 'ga'
	| 'tl'
	| 'ms'
	| 'he'
	| 'af'
	| 'pt-BR'
	| 'es-MX';

/**
 * Language metadata
 */
export interface LanguageInfo {
	/** Native name of the language */
	nativeName: string;
	/** English name of the language */
	englishName: string;
	/** Flag emoji */
	emoji: string;
	/** RTL language */
	rtl?: boolean;
}

/**
 * Complete language definitions
 */
export const LANGUAGES: Record<LanguageCode, LanguageInfo> = {
	// Major languages
	en: { nativeName: 'English', englishName: 'English', emoji: '🇬🇧' },
	de: { nativeName: 'Deutsch', englishName: 'German', emoji: '🇩🇪' },
	fr: { nativeName: 'Français', englishName: 'French', emoji: '🇫🇷' },
	es: { nativeName: 'Español', englishName: 'Spanish', emoji: '🇪🇸' },
	it: { nativeName: 'Italiano', englishName: 'Italian', emoji: '🇮🇹' },
	pt: { nativeName: 'Português', englishName: 'Portuguese', emoji: '🇵🇹' },
	nl: { nativeName: 'Nederlands', englishName: 'Dutch', emoji: '🇳🇱' },
	pl: { nativeName: 'Polski', englishName: 'Polish', emoji: '🇵🇱' },
	ru: { nativeName: 'Русский', englishName: 'Russian', emoji: '🇷🇺' },

	// Asian languages
	ja: { nativeName: '日本語', englishName: 'Japanese', emoji: '🇯🇵' },
	ko: { nativeName: '한국어', englishName: 'Korean', emoji: '🇰🇷' },
	zh: { nativeName: '中文', englishName: 'Chinese', emoji: '🇨🇳' },
	vi: { nativeName: 'Tiếng Việt', englishName: 'Vietnamese', emoji: '🇻🇳' },
	th: { nativeName: 'ไทย', englishName: 'Thai', emoji: '🇹🇭' },
	id: { nativeName: 'Bahasa Indonesia', englishName: 'Indonesian', emoji: '🇮🇩' },
	ms: { nativeName: 'Bahasa Melayu', englishName: 'Malay', emoji: '🇲🇾' },
	tl: { nativeName: 'Filipino', englishName: 'Filipino', emoji: '🇵🇭' },

	// South Asian languages
	hi: { nativeName: 'हिन्दी', englishName: 'Hindi', emoji: '🇮🇳' },
	bn: { nativeName: 'বাংলা', englishName: 'Bengali', emoji: '🇧🇩' },
	ur: { nativeName: 'اردو', englishName: 'Urdu', emoji: '🇵🇰', rtl: true },

	// Middle Eastern languages
	ar: { nativeName: 'العربية', englishName: 'Arabic', emoji: '🇦🇪', rtl: true },
	fa: { nativeName: 'فارسی', englishName: 'Persian', emoji: '🇮🇷', rtl: true },
	he: { nativeName: 'עברית', englishName: 'Hebrew', emoji: '🇮🇱', rtl: true },
	tr: { nativeName: 'Türkçe', englishName: 'Turkish', emoji: '🇹🇷' },

	// Nordic languages
	sv: { nativeName: 'Svenska', englishName: 'Swedish', emoji: '🇸🇪' },
	da: { nativeName: 'Dansk', englishName: 'Danish', emoji: '🇩🇰' },
	fi: { nativeName: 'Suomi', englishName: 'Finnish', emoji: '🇫🇮' },
	nb: { nativeName: 'Norsk', englishName: 'Norwegian', emoji: '🇳🇴' },

	// Eastern European languages
	uk: { nativeName: 'Українська', englishName: 'Ukrainian', emoji: '🇺🇦' },
	cs: { nativeName: 'Čeština', englishName: 'Czech', emoji: '🇨🇿' },
	hu: { nativeName: 'Magyar', englishName: 'Hungarian', emoji: '🇭🇺' },
	ro: { nativeName: 'Română', englishName: 'Romanian', emoji: '🇷🇴' },
	bg: { nativeName: 'Български', englishName: 'Bulgarian', emoji: '🇧🇬' },
	hr: { nativeName: 'Hrvatski', englishName: 'Croatian', emoji: '🇭🇷' },
	sk: { nativeName: 'Slovenčina', englishName: 'Slovak', emoji: '🇸🇰' },
	sl: { nativeName: 'Slovenščina', englishName: 'Slovenian', emoji: '🇸🇮' },
	sr: { nativeName: 'Српски', englishName: 'Serbian', emoji: '🇷🇸' },

	// Baltic languages
	lt: { nativeName: 'Lietuvių', englishName: 'Lithuanian', emoji: '🇱🇹' },
	lv: { nativeName: 'Latviešu', englishName: 'Latvian', emoji: '🇱🇻' },
	et: { nativeName: 'Eesti', englishName: 'Estonian', emoji: '🇪🇪' },

	// Other European languages
	el: { nativeName: 'Ελληνικά', englishName: 'Greek', emoji: '🇬🇷' },
	mt: { nativeName: 'Malti', englishName: 'Maltese', emoji: '🇲🇹' },
	ga: { nativeName: 'Gaeilge', englishName: 'Irish', emoji: '🇮🇪' },

	// African languages
	af: { nativeName: 'Afrikaans', englishName: 'Afrikaans', emoji: '🇿🇦' },

	// Regional variants
	'pt-BR': { nativeName: 'Português (Brasil)', englishName: 'Portuguese (Brazil)', emoji: '🇧🇷' },
	'es-MX': { nativeName: 'Español (México)', englishName: 'Spanish (Mexico)', emoji: '🇲🇽' },
};

/**
 * Get list of all language codes
 */
export function getLanguageCodes(): LanguageCode[] {
	return Object.keys(LANGUAGES) as LanguageCode[];
}

/**
 * Get language info by code
 */
export function getLanguageInfo(code: string): LanguageInfo | undefined {
	return LANGUAGES[code as LanguageCode];
}

/**
 * Check if a language code is supported
 */
export function isLanguageSupported(code: string): code is LanguageCode {
	return code in LANGUAGES;
}

/**
 * Check if a language is RTL
 */
export function isRTL(code: string): boolean {
	const info = LANGUAGES[code as LanguageCode];
	return info?.rtl === true;
}

/**
 * Get display name for a language (native name with emoji)
 */
export function getLanguageDisplayName(code: string): string {
	const info = LANGUAGES[code as LanguageCode];
	if (!info) return code;
	return `${info.emoji} ${info.nativeName}`;
}

/**
 * Common locale groups for filtering
 */
export const LOCALE_GROUPS = {
	/** European Union official languages */
	eu: [
		'en',
		'de',
		'fr',
		'es',
		'it',
		'pt',
		'nl',
		'pl',
		'cs',
		'da',
		'fi',
		'sv',
		'el',
		'hu',
		'ro',
		'bg',
		'hr',
		'sk',
		'sl',
		'lt',
		'lv',
		'et',
		'mt',
		'ga',
	] as LanguageCode[],
	/** Major world languages */
	major: ['en', 'de', 'fr', 'es', 'it', 'pt', 'ru', 'ja', 'ko', 'zh', 'ar'] as LanguageCode[],
	/** DACH region (German-speaking) */
	dach: ['de'] as LanguageCode[],
	/** Nordic countries */
	nordic: ['sv', 'da', 'fi', 'nb'] as LanguageCode[],
	/** RTL languages */
	rtl: ['ar', 'fa', 'he', 'ur'] as LanguageCode[],
};

/**
 * Get languages by group
 */
export function getLanguagesByGroup(group: keyof typeof LOCALE_GROUPS): LanguageCode[] {
	return LOCALE_GROUPS[group];
}