// Builds src/design/icons.generated.ts from Material Symbols Rounded (design-spec §2.12; Apache-2.0):
// outline = @material-symbols/svg-500 (FILL 0, weight 500), filled = @material-symbols/svg-600 (FILL 1, weight 600).
// Only the icons listed here are embedded; a feature plan adds a name and runs `npm run icons:import`.
// `--check` compares with the file on disk instead of writing.
import { existsSync, readFileSync, writeFileSync } from 'node:fs';

/** The 33 category icon tokens of SPEC §9.7, in CategoryIcons.ALL order. Both variants (picker and tiles). */
export const CATEGORY_ICONS = [
  'shopping_cart',
  'restaurant',
  'local_cafe',
  'home',
  'bolt',
  'water_drop',
  'wifi',
  'directions_car',
  'train',
  'local_gas_station',
  'flight',
  'hotel',
  'luggage',
  'movie',
  'music_note',
  'sports_esports',
  'fitness_center',
  'medical_services',
  'medication',
  'shopping_bag',
  'checkroom',
  'pets',
  'child_care',
  'school',
  'card_giftcard',
  'celebration',
  'build',
  'chair',
  'subscriptions',
  'category',
  'key',
  'shield',
  'account_balance',
];

/** UI icons of design-spec §2.12 plus the web's own (search, keyboard, logout, language, theme). Outline variant. */
const UI_OUTLINE = [
  'home',
  'bar_chart',
  'settings',
  'add',
  'close',
  'arrow_back',
  'more_vert',
  'edit',
  'delete',
  'check',
  'swap_horiz',
  'handshake',
  'cloud_upload',
  'cloud_off',
  'cloud_done',
  'sync',
  'sync_problem',
  'warning',
  'error',
  'info',
  'check_circle',
  'chevron_right',
  'expand_more',
  'expand_less',
  'inventory_2',
  'unarchive',
  'event',
  'call_split',
  'notes',
  'person',
  'apps',
  'backspace',
  'calculate',
  'date_range',
  'content_paste',
  'link',
  'dns',
  'person_add',
  'add_a_photo',
  'photo_library',
  'receipt_long',
  'schedule',
  'pause',
  'event_repeat',
  'drag_indicator',
  'restart_alt',
  'lock',
  'download',
  'refresh',
  'phonelink_erase',
  'smartphone',
  'block',
  'devices',
  'add_link',
  'key',
  'share',
  'content_copy',
  'memory',
  'open_in_new',
  'arrow_forward',
  'search',
  'keyboard',
  'logout',
  'language',
  'contrast',
  'lightbulb',
];

/** Filled UI icons of design-spec §2.12 (selected nav, status, handshake, app mark). */
const UI_FILLED = [
  'home',
  'bar_chart',
  'settings',
  'handshake',
  'cloud_done',
  'warning',
  'error',
  'check_circle',
  'receipt_long',
  'search',
  'lightbulb',
];

/**
 * Spec token names that Material Symbols 0.48 ships under another file name (the glyph is the same). The spec's name
 * stays the key in the generated tables. The APK-update icons of S-17 are not embedded: the web has no APK update.
 */
const FILE_NAMES = {
  card_giftcard: 'redeem',
  expand_more: 'keyboard_arrow_down',
  expand_less: 'keyboard_arrow_up',
  phonelink_erase: 'mobile_cancel',
  smartphone: 'mobile',
};

const root = new URL('../', import.meta.url);

function pathOf(pkg, file) {
  const url = new URL(`node_modules/@material-symbols/${pkg}/rounded/${file}.svg`, root);
  const svg = readFileSync(url, 'utf-8');
  if (!svg.includes('viewBox="0 -960 960 960"')) throw new Error(`${pkg}/${file}: unexpected viewBox`);
  const paths = [...svg.matchAll(/<path d="([^"]+)"\/>/g)].map((m) => m[1]);
  if (paths.length !== 1) throw new Error(`${pkg}/${file}: expected one path, found ${paths.length}`);
  return paths[0];
}

function table(names, pkg, suffix) {
  const unique = [...new Set(names)].sort();
  return unique.map((name) => `  ${name}: '${pathOf(pkg, (FILE_NAMES[name] ?? name) + suffix)}',`).join('\n');
}

const text = `// Generated by scripts/gen-icons.mjs (npm run icons:import). Do not edit.
// Material Symbols Rounded, viewBox 0 -960 960 960; outline from @material-symbols/svg-500, filled from
// @material-symbols/svg-600. Licence: Apache License 2.0 (Google).

export const OUTLINE = {
${table([...CATEGORY_ICONS, ...UI_OUTLINE], 'svg-500', '')}
} as const;

export const FILLED = {
${table([...CATEGORY_ICONS, ...UI_FILLED], 'svg-600', '-fill')}
} as const;

export const CATEGORY_ICON_TOKENS = [
${CATEGORY_ICONS.map((n) => `  '${n}',`).join('\n')}
] as const;

export type OutlineIconName = keyof typeof OUTLINE;
export type FilledIconName = keyof typeof FILLED;
export type CategoryIconToken = (typeof CATEGORY_ICON_TOKENS)[number];
`;

const target = new URL('src/design/icons.generated.ts', root);
if (process.argv.includes('--check')) {
  const current = existsSync(target) ? readFileSync(target, 'utf-8') : '';
  if (current !== text) {
    console.error('src/design/icons.generated.ts is stale: run npm run icons:import');
    process.exit(1);
  }
} else {
  writeFileSync(target, text);
  console.log(
    `src/design/icons.generated.ts: ${new Set([...CATEGORY_ICONS, ...UI_OUTLINE]).size} outline, ${new Set([...CATEGORY_ICONS, ...UI_FILLED]).size} filled`,
  );
}