import { KEYMAP_IDS } from "$lib/serial/keymap-codes";
import type { CharaChordFile } from "$lib/share/chara-file";

const SPECIAL_KEYS = new Map<string, string>([[" ", "SPACE"]]);

export function csvChordsToJson(csv: string): CharaChordFile {
  return {
    charaVersion: 1,
    type: "chords",
    chords: csv
      .trim()
      .split("\n")
      .map((line) => {
        const [input, output] = line.split(/,(?=[^,]*$)/, 2);
        return [
          input!
            .split("+")
            .map((it) => KEYMAP_IDS.get(it.trim())?.code ?? 0)
            .sort((a, b) => a - b),
          output!
            .trim()
            .split("")
            .map((it) => KEYMAP_IDS.get(SPECIAL_KEYS.get(it) ?? it)?.code ?? 0),
        ];
      }),
  };
}

export function isCsvChords(csv: string): boolean {
  return /^([^+]+( *\+ *[^+]+)* *, *[^+, ]+ *(\n|(?=$)))+$/.test(csv);
}