// Copyright Abridged, Inc. 2023,2024. All Rights Reserved.
// Node module: @collabland/common
// This file is licensed under the MIT License.
// License text available at https://opensource.org/licenses/MIT

const similarChars: {[prop: string]: string[]} = {
  c: [
    'ℂ',
    '℃',
    'Ⅽ',
    'ⅽ',
    'ↅ',
    '∁',
    '⊂',
    '⊆',
    '⊊',
    '⊏',
    '⊑',
    '⋤',
    '⋐',
    'Ⓒ',
    '⒞',
    '⟈',
    '€',
    '₢',
  ],
  o: [
    '⊙',
    '⊚',
    '⌀',
    '⍤',
    '⍥',
    '⎔',
    'ⓞ',
    '○',
    '◌',
    '◎',
    '◯',
    '◉',
    '▢',
    '◴',
    '◵',
    '◶',
    '◷',
    '⚆',
    '⚇',
    '⚪',
    '⚬',
    '⟳',
    '⟲',
  ],
  l: [
    'Ⅰ',
    'Ⅼ',
    'ⅼ',
    'Ⅱ',
    '↿',
    '⇂',
    '∟',
    '∣',
    '∤',
    '∥',
    '⌊',
    '⌞',
    '⍳',
    '⎢',
    '⎣',
    '⎥',
    '⎪',
    '⎮',
    '⎜',
    '⎟',
    '⎱',
    '⎳',
    '⎸',
    '⎹',
    '⎿',
    '⏐',
    'Ⓛ',
    'ⓛ',
    '│',
    '┃',
    '║',
    '╽',
    '╿',
    '▎',
    '▏',
    '▕',
    '❘',
    '❙',
    '₤',
    'ₗ',
  ],
  a: ['₳', 'Å', 'ₐ'],
  b: ['ⓑ', 'Ⓑ', '♭', '₿'],
  n: ['∩', '⊓', '⋂', '⋒', 'ⓝ', '⒩', 'Ⓝ'],
  d: ['ⅆ', 'ⅾ', 'Ⅾ', '₫'],
};

export function normalizeWord(str: string): string {
  const englishCharMapping: any = {};
  for (const c in similarChars) {
    for (const ch of similarChars[c]) {
      englishCharMapping[ch] = c;
    }
  }
  let englishStr: string = str.normalize('NFD').replace(/[\u0300-\u036f]/g, '');
  for (const ch in englishCharMapping) {
    englishStr = englishStr.replace(
      new RegExp(ch, 'gi'),
      englishCharMapping[ch],
    );
  }
  englishStr = englishStr.replace(/[^A-Z0-9]+/gi, '').toLowerCase();
  return englishStr;
}