#!/usr/bin/env node
/**
 * D36: 第八轮令牌收割（仅登记 uni.scss 已有等值令牌的残留 hex）
 * 排除 8 位带 alpha 的 hex（如 #F9731622），避免丢失透明度
 */
const fs = require('fs');
const path = require('path');

function norm(h) {
  const x = h.toUpperCase();
  const body = x.slice(1);
  if (body.length === 3) return '#' + body.split('').map(c => c + c).join('');
  return x;
}

const scss = fs.readFileSync('uni.scss', 'utf8');
const byHex = {};
for (const line of scss.split(/\r?\n/)) {
  const m = line.match(/^\s*(\$[\w-]+)\s*:\s*(#[0-9a-fA-F]{3,8})\s*;/);
  if (m) {
    const k = norm(m[2]);
    (byHex[k] = byHex[k] || []).push(m[1]);
  }
}

const RULES_FILE = 'scripts/replace-hex-to-token.js';
let ruleSrc = fs.readFileSync(RULES_FILE, 'utf8');
const ruleUpper = ruleSrc.toUpperCase();

const HEX = /#[0-9a-fA-F]{3,8}\b/g;
const counts = new Map();
function walk(d) {
  for (const n of fs.readdirSync(d)) {
    if (['node_modules', 'dist', 'unpackage', '.git', 'scripts', '.tmp_equiv'].includes(n)) continue;
    const p = path.join(d, n);
    const st = fs.statSync(p);
    if (st.isDirectory()) walk(p);
    else if (n.endsWith('.vue')) {
      const s = fs.readFileSync(p, 'utf8');
      const si = s.search(/<style/);
      if (si === -1) continue;
      (s.slice(si).match(HEX) || []).forEach(h => counts.set(h.toUpperCase(), (counts.get(h.toUpperCase()) || 0) + 1));
    }
  }
}
walk('.');

const pairs = [];
for (const [hex, cnt] of counts) {
  if (hex.slice(1).length === 8) continue;            // 带 alpha，跳过
  const tokens = byHex[norm(hex)];
  if (!tokens) continue;
  if (ruleUpper.includes("'" + hex + "'")) continue;   // 已登记
  pairs.push({ hex, token: tokens[0], cnt });
}
pairs.sort((a, b) => b.cnt - a.cnt);

if (!pairs.length) {
  console.log('无新增可映射 hex');
  process.exit(0);
}

const lines = pairs.map(p =>
  "  ['" + p.hex + "', '" + p.token + "'],\n  ['" + p.hex.toLowerCase() + "', '" + p.token + "'],"
).join('\n');

ruleSrc = ruleSrc.replace(
  /\n\]\.sort\(\(a, b\) => b\[0\]\.length - a\[0\]\.length\)/,
  '\n  // ---- 第八轮（uni.scss 已有令牌补登记，2026-10-21）----\n' + lines + '\n].sort((a, b) => b[0].length - a[0].length)'
);
fs.writeFileSync(RULES_FILE, ruleSrc);
console.log('登记规则数:', pairs.length);
console.log(pairs.map(p => p.hex + ' x' + p.cnt + ' -> ' + p.token).join('\n'));