"use strict";
function resolveCharacters(chars) {
  if (chars === "") {
    return [];
  }
  if (typeof chars === "string") {
    chars = [chars];
  }
  const result = [];
  for (let i = 0, j = chars.length; i < j; i++) {
    const item = chars[i];
    if (Array.isArray(item)) {
      if (item.length !== 2) {
        throw new Error(`[BitmapFont]: Invalid character range length, expecting 2 got ${item.length}.`);
      }
      if (item[0].length === 0 || item[1].length === 0) {
        throw new Error("[BitmapFont]: Invalid character delimiter.");
      }
      const startCode = item[0].charCodeAt(0);
      const endCode = item[1].charCodeAt(0);
      if (endCode < startCode) {
        throw new Error("[BitmapFont]: Invalid character range.");
      }
      for (let i2 = startCode, j2 = endCode; i2 <= j2; i2++) {
        result.push(String.fromCharCode(i2));
      }
    } else {
      result.push(...Array.from(item));
    }
  }
  if (result.length === 0) {
    throw new Error("[BitmapFont]: Empty set when resolving characters.");
  }
  return result;
}

export { resolveCharacters };
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