/**
 * Builds obj from unicode emoji-test text
 * @reference https://unicode.org/Public/emoji/14.0/emoji-test.txt
 * @reference http://www.unicode.org/reports/tr51/
 *
 * @example deno run --allow-net fetch-emoji.ts
 */

type Qualification = "fully-qualified" | "minimally-qualified" | "unqualified";

interface EmojiObj {
  emoji: string;
  version: number;
  name: string;
  qualification: Qualification;
  codepoints: string[];
  ln?: string;
}

interface Results {
  [groupName: string]: {
    [subgroupName: string]: EmojiObj[];
  };
}

const version = "14.0";
const response = await fetch(
  `https://unicode.org/Public/emoji/${version}/emoji-test.txt`,
);
const text = await response.text();

const groups = text.split("# group: ");
groups.shift();

const results: Results = {};

groups.forEach((group) => {
  const [rawGroupName, ...subgroups] = group.split("# subgroup: ");
  const groupName = rawGroupName.replace("\n\n", "");

  results[groupName] = {};

  subgroups.map((subgroup) => {
    const [subgroupName, ...emojis] = subgroup.split("\n");

    const emojiObjs = emojis
      .map((ln): EmojiObj => {
        const [_, codepoints, qualification, emoji, version, name] = ln.match(
          /^(.*);(.*)#(.*)E(\S*)\s(.*)/,
        ) || [];
        return {
          emoji: (emoji || "").trim(),
          version: Number(version),
          name: name,
          qualification: (qualification || "").trim() as Qualification,
          codepoints: (codepoints || "").trim().split(/\s+/),
          // ln: ln,
        };
      })
      .filter((emojiObj) =>
        emojiObj.emoji && emojiObj.qualification === "fully-qualified"
      );

    results[groupName][subgroupName] = emojiObjs;
  });
});

console.log(results);