jiu/client/tool/gen_tokens.mjs

// client/tool/gen_tokens.mjs
// 解析 token_source/tokens.css 的三套主题块 → 生成 app_tokens.g.dart。
// 用法：node tool/gen_tokens.mjs   （在 client/ 下运行）
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..');
const css = fs.readFileSync(path.join(ROOT, 'lib/core/theme/token_source/tokens.css'), 'utf8');

// CSS 变量名(kebab) → dart 字段(camel)。仅这些进 AppTokens。
const FIELDS = {
  'page':'page','bg':'bg','surface':'surface','border':'border','border-subtle':'borderSubtle',
  'text':'text','heading':'heading','title':'title','muted':'muted','faint':'faint',
  'primary':'primary','primary-dark':'primaryDark','on-primary':'onPrimary','brand400':'brand400',
  'brand50':'brand50','accent':'accent','success':'success','danger':'danger','warn':'warn',
  'info-soft':'infoSoft','ok-soft':'okSoft','accent-soft':'accentSoft','success-bg':'successBg',
  'danger-bg':'dangerBg','warn-bg':'warnBg','th-bg':'thBg','row-hover':'rowHover','shadow':'shadow',
  'top-bg':'topBg','top-fg':'topFg','top-faint':'topFaint','top-border':'topBorder','top-control':'topControl',
  'top-mark-bg':'topMarkBg','top-mark-fg':'topMarkFg','side-bg':'sideBg','side-fg':'sideFg',
  'side-muted':'sideMuted','side-active-bg':'sideActiveBg','side-active-fg':'sideActiveFg',
  'side-border':'sideBorder','side-hover':'sideHover','menu-user-bg':'menuUserBg',
  'menu-user-fg':'menuUserFg','menu-user-hover':'menuUserHover',
};
const DARK = { a:false, b:true, c:false };

function block(key){
  const m = css.match(new RegExp(`\\[data-theme="${key}"\\]\\s*\\{([^}]*)\\}`));
  if(!m) throw new Error('missing theme block: '+key);
  const out = {};
  for(const mm of m[1].matchAll(/--([a-z0-9-]+)\s*:\s*([^;]+);/g)) out[mm[1]] = mm[2].trim();
  return out;
}
function toColor(raw){
  let v = raw.trim();
  if(v.startsWith('linear-gradient')){ const h = v.match(/#([0-9a-fA-F]{6})/); v = '#'+h[1]; } // 取首个 hex
  let m = v.match(/^#([0-9a-fA-F]{6})$/);
  if(m) return `Color(0xFF${m[1].toUpperCase()})`;
  m = v.match(/^rgba?\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(?:,\s*([\d.]+))?\s*\)$/);
  if(m){ const a = Math.round((m[4]===undefined?1:parseFloat(m[4]))*255).toString(16).padStart(2,'0');
    const hex = [m[1],m[2],m[3]].map(n=>(+n).toString(16).padStart(2,'0')).join(''); return `Color(0x${a}${hex.toUpperCase()})`; }
  throw new Error('unsupported color value: '+raw);
}
function emit(key){
  const b = block(key);
  const lines = Object.entries(FIELDS).map(([css,dart])=>{
    if(b[css]===undefined) throw new Error(`theme ${key} missing --${css}`);
    return `  ${dart}: ${toColor(b[css])},`;
  });
  lines.push(`  isDark: ${DARK[key]},`);
  return `const AppTokens kTokens${key.toUpperCase()} = AppTokens(\n${lines.join('\n')}\n);`;
}

const body = `// GENERATED by tool/gen_tokens.mjs — DO NOT EDIT.
// 源：lib/core/theme/token_source/tokens.css（从原型同步）。改色请改源后重跑脚本。
import 'package:flutter/material.dart';
import 'app_tokens.dart';

${emit('a')}

${emit('b')}

${emit('c')}

AppTokens appTokensOf(String key) {
  switch (key) {
    case 'b': return kTokensB;
    case 'c': return kTokensC;
    default: return kTokensA;
  }
}
`;
fs.writeFileSync(path.join(ROOT, 'lib/core/theme/app_tokens.g.dart'), body);
console.log('generated app_tokens.g.dart');

// ── 主题无关标量（间距/圆角/字号）：解析 :root{} 共享块 → AppDims ──
function rootBlock(){
  // 匹配 ":root{" 而非 ":root[data-theme=...]"（前者 { 紧跟）
  const m = css.match(/:root\s*\{([^}]*)\}/);
  if(!m) throw new Error('missing :root shared block');
  const out = {};
  for(const mm of m[1].matchAll(/--([a-z0-9-]+)\s*:\s*([^;]+);/g)) out[mm[1]] = mm[2].trim();
  return out;
}
// kebab → camel：sp-1→sp1 · r-sm→rSm · fs-h1→fsH1 · fs-display→fsDisplay
function camel(name){
  const [h, ...rest] = name.split('-');
  return h + rest.map(s => s.charAt(0).toUpperCase() + s.slice(1)).join('');
}
function px(raw){
  const m = raw.trim().match(/^([\d.]+)px$/);
  if(!m) throw new Error('unsupported dim value: ' + raw);
  return m[1];
}
function emitDims(){
  const r = rootBlock();
  const groups = [
    ['间距', k => k.startsWith('sp-')],
    ['圆角', k => k.startsWith('r-')],
    ['字号', k => k.startsWith('fs-')],
  ];
  const lines = [];
  for(const [label, pick] of groups){
    const keys = Object.keys(r).filter(pick);
    if(!keys.length) continue;
    lines.push(`  // ${label}`);
    for(const k of keys) lines.push(`  static const double ${camel(k)} = ${px(r[k])};`);
  }
  return lines.join('\n');
}
const dimsBody = `// GENERATED by tool/gen_tokens.mjs — DO NOT EDIT.
// 源：lib/core/theme/token_source/tokens.css（:root 共享块，主题无关）。改尺寸请改源后重跑脚本。
// 间距/圆角/字号三套主题统一，故为 const 标量，不进 per-theme AppTokens。

class AppDims {
  AppDims._();
${emitDims()}
}
`;
fs.writeFileSync(path.join(ROOT, 'lib/core/theme/app_dims.g.dart'), dimsBody);
console.log('generated app_dims.g.dart');