import { GrammyParseMode, GrammyTypes } from "./deps.ts";

export function formatOrdinal(n: number) {
  if (n % 100 === 11 || n % 100 === 12 || n % 100 === 13) return `${n}th`;
  if (n % 10 === 1) return `${n}st`;
  if (n % 10 === 2) return `${n}nd`;
  if (n % 10 === 3) return `${n}rd`;
  return `${n}th`;
}

export const fmt = (
  rawStringParts: TemplateStringsArray | GrammyParseMode.Stringable[],
  ...stringLikes: GrammyParseMode.Stringable[]
): GrammyParseMode.FormattedString => {
  let text = "";
  const entities: GrammyTypes.MessageEntity[] = [];

  const length = Math.max(rawStringParts.length, stringLikes.length);
  for (let i = 0; i < length; i++) {
    for (const stringLike of [rawStringParts[i], stringLikes[i]]) {
      if (stringLike instanceof GrammyParseMode.FormattedString) {
        entities.push(
          ...stringLike.entities.map((e) => ({
            ...e,
            offset: e.offset + text.length,
          })),
        );
      }
      if (stringLike != null) text += stringLike.toString();
    }
  }
  return new GrammyParseMode.FormattedString(text, entities);
};

export function formatUserChat(ctx: { from?: GrammyTypes.User; chat?: GrammyTypes.Chat }) {
  const msg: string[] = [];
  if (ctx.from) {
    msg.push(ctx.from.first_name);
    if (ctx.from.last_name) msg.push(ctx.from.last_name);
    if (ctx.from.username) msg.push(`(@${ctx.from.username})`);
    if (ctx.from.language_code) msg.push(`(${ctx.from.language_code.toUpperCase()})`);
  }
  if (ctx.chat) {
    if (
      ctx.chat.type === "group" ||
      ctx.chat.type === "supergroup" ||
      ctx.chat.type === "channel"
    ) {
      msg.push("in");
      msg.push(ctx.chat.title);
      if (
        (ctx.chat.type === "supergroup" || ctx.chat.type === "channel") &&
        ctx.chat.username
      ) {
        msg.push(`(@${ctx.chat.username})`);
      }
    }
  }
  return msg.join(" ");
}

/** Language to biggest country emoji map */
const languageToFlagMap: Record<string, string> = {
  "en": "🇺🇸", // English - United States
  "zh": "🇨🇳", // Chinese - China
  "es": "🇪🇸", // Spanish - Spain
  "hi": "🇮🇳", // Hindi - India
  "ar": "🇪🇬", // Arabic - Egypt
  "pt": "🇧🇷", // Portuguese - Brazil
  "bn": "🇧🇩", // Bengali - Bangladesh
  "ru": "🇷🇺", // Russian - Russia
  "ja": "🇯🇵", // Japanese - Japan
  "pa": "🇮🇳", // Punjabi - India
  "de": "🇩🇪", // German - Germany
  "ko": "🇰🇷", // Korean - South Korea
  "fr": "🇫🇷", // French - France
  "tr": "🇹🇷", // Turkish - Turkey
  "ur": "🇵🇰", // Urdu - Pakistan
  "it": "🇮🇹", // Italian - Italy
  "th": "🇹🇭", // Thai - Thailand
  "vi": "🇻🇳", // Vietnamese - Vietnam
  "pl": "🇵🇱", // Polish - Poland
  "uk": "🇺🇦", // Ukrainian - Ukraine
  "uz": "🇺🇿", // Uzbek - Uzbekistan
  "su": "🇮🇩", // Sundanese - Indonesia
  "sw": "🇹🇿", // Swahili - Tanzania
  "nl": "🇳🇱", // Dutch - Netherlands
  "fi": "🇫🇮", // Finnish - Finland
  "el": "🇬🇷", // Greek - Greece
  "da": "🇩🇰", // Danish - Denmark
  "cs": "🇨🇿", // Czech - Czech Republic
  "sk": "🇸🇰", // Slovak - Slovakia
  "bg": "🇧🇬", // Bulgarian - Bulgaria
  "sv": "🇸🇪", // Swedish - Sweden
  "be": "🇧🇾", // Belarusian - Belarus
  "hu": "🇭🇺", // Hungarian - Hungary
  "lt": "🇱🇹", // Lithuanian - Lithuania
  "lv": "🇱🇻", // Latvian - Latvia
  "et": "🇪🇪", // Estonian - Estonia
  "sl": "🇸🇮", // Slovenian - Slovenia
  "hr": "🇭🇷", // Croatian - Croatia
  "zu": "🇿🇦", // Zulu - South Africa
  "id": "🇮🇩", // Indonesian - Indonesia
  "is": "🇮🇸", // Icelandic - Iceland
  "lb": "🇱🇺", // Luxembourgish - Luxembourg
};

export function getFlagEmoji(languageCode?: string): string | undefined {
  if (!languageCode) return;
  return languageToFlagMap[languageCode];
}