#!/usr/bin/env node
// gen_flutter_icons.mjs —— 图标单源 codegen（ds-flow step 2a）。
// 图标真源 = design/prototype/icons.js（Lucide sprite）。读其 key 集，kebab→camel，
// 生成 client/lib/widgets/pangolin_icons.dart（每个 sprite key 一行 static const）。
// 零依赖（Node fs）。运行：node design/codegen/gen_flutter_icons.mjs
import { readFileSync, writeFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import { dirname, resolve } from 'node:path';

const __dirname = dirname(fileURLToPath(import.meta.url));
const root = resolve(__dirname, '..', '..');
const SPRITE = resolve(root, 'design/prototype/icons.js');
const OUT = resolve(root, 'client/lib/widgets/pangolin_icons.dart');

const src = readFileSync(SPRITE, 'utf8');
// 抽 key：形如  'kebab-name': '<...
const keys = [];
const re = /'([a-z0-9-]+)'\s*:\s*'</g;
let m;
while ((m = re.exec(src)) !== null) keys.push(m[1]);
if (keys.length === 0) { console.error('no icon keys found in', SPRITE); process.exit(1); }
// 去重、稳定顺序（保留 sprite 出现次序）
const seen = new Set();
const ordered = keys.filter((k) => (seen.has(k) ? false : (seen.add(k), true)));

const camel = (k) => k.replace(/-([a-z0-9])/g, (_, c) => c.toUpperCase());

const lines = ordered.map((k) => {
  const c = camel(k);
  return `  static const ${c} = LucideIcons.${c};`;
});

const out = `// GENERATED by design/codegen/gen_flutter_icons.mjs —— 勿手改；图标真源=design/prototype/icons.js
// 重新生成：node design/codegen/gen_flutter_icons.mjs
import 'package:lucide_icons_flutter/lucide_icons.dart';

class PangolinIcons {
  PangolinIcons._();

${lines.join('\n')}
}
`;

writeFileSync(OUT, out);
console.log(`generated ${OUT} (${ordered.length} icons)`);