#!/usr/bin/env node
/**
 * patch-p1-fast-cache-fields-fix.js
 *
 * P1.5 微调: 修正 fast-cache.js 的字段映射，匹配实际 stats-compiled.json 结构。
 *
 *   stats.summary.hooks = 46 (总数)
 *   stats.summary.hooksRegistered = 22 (已注册子集)
 *   stats.summary.mcpTotal = 26
 *
 * settings.json 顶层无 mcpServers (MCP 配置在 ~/.claude.json)，需从 stats.summary 读
 */

'use strict';
const fs = require('fs');
const path = require('path');

const TARGET = path.join(__dirname, '..', '..', 'hooks', 'lib', 'fast-cache.js');
const SENTINEL_OLD = 'P1-FAST-CACHE-V1';
const SENTINEL_NEW = 'P1-FAST-CACHE-V1-FIELDS-FIX';

function main() {
  if (!fs.existsSync(TARGET)) {
    process.stderr.write('[ERROR] fast-cache.js not found, run patch-p1-fast-cache-lib.js first\n');
    process.exit(1);
  }
  let src = fs.readFileSync(TARGET, 'utf8');

  if (src.includes(SENTINEL_NEW)) {
    process.stdout.write('[SKIP] already fixed\n');
    process.exit(0);
  }
  if (!src.includes(SENTINEL_OLD)) {
    process.stderr.write('[ERROR] base v1 not deployed\n');
    process.exit(1);
  }

  const ts = new Date().toISOString().replace(/[:.]/g, '-');
  fs.copyFileSync(TARGET, TARGET + '.bak.' + ts);
  process.stdout.write('[BACKUP] ' + TARGET + '.bak.' + ts + '\n');

  // 修正派生字段
  const OLD_BLOCK =
    "    rebuilt.mcpCount = Object.keys(rebuilt.mcpServers || {}).length;\n" +
    "    rebuilt.skillCount = (rebuilt.summary || {}).skills || 0;\n" +
    "    rebuilt.hookCount = (rebuilt.summary || {}).hooksRegistered || (rebuilt.summary || {}).hooks || 0;\n" +
    "    rebuilt.agentCount = (rebuilt.summary || {}).agents || 0;";

  const NEW_BLOCK =
    "    // " + SENTINEL_NEW + ": stats.summary 字段名修正\n" +
    "    const _sum = rebuilt.summary || {};\n" +
    "    rebuilt.skillCount = _sum.skills || 0;\n" +
    "    rebuilt.hookCount = _sum.hooks || 0;                  // 总数\n" +
    "    rebuilt.hookRegisteredCount = _sum.hooksRegistered || 0;\n" +
    "    rebuilt.agentCount = _sum.agents || 0;\n" +
    "    rebuilt.mcpCount = _sum.mcpTotal || _sum.mcp || 0;";

  if (!src.includes(OLD_BLOCK)) {
    process.stderr.write('[ERROR] expected block not found\n');
    process.exit(1);
  }

  const updated = src.replace(OLD_BLOCK, NEW_BLOCK);

  // 同时移除原 SOURCES 中 settings.json 的 mcpServers 字段（无效）
  const SRC_OLD = "  { file: path.join(ROOT, 'settings.json'),       fields: ['mcpServers'] },";
  const SRC_NEW = "  // settings.json 不再读取 mcpServers (MCP 配置在 ~/.claude.json，由 stats 编译)";
  const final = updated.includes(SRC_OLD) ? updated.replace(SRC_OLD, SRC_NEW) : updated;

  const tmpPath = TARGET + '.tmp.' + process.pid;
  fs.writeFileSync(tmpPath, final);

  try {
    delete require.cache[require.resolve(tmpPath)];
    const mod = require(tmpPath);
    const c = mod.readFastCache();
    if (c.skillCount !== 94) throw new Error('skillCount expected 94 got ' + c.skillCount);
    if (c.hookCount !== 46) throw new Error('hookCount expected 46 got ' + c.hookCount);
    if (c.mcpCount !== 26) throw new Error('mcpCount expected 26 got ' + c.mcpCount);
    fs.renameSync(tmpPath, TARGET);
    process.stdout.write('[OK] fast-cache.js fields fixed\n');
    process.stdout.write('     skills=' + c.skillCount + ' hooks=' + c.hookCount + ' mcp=' + c.mcpCount + ' agents=' + c.agentCount + '\n');
  } catch (e) {
    fs.unlinkSync(tmpPath);
    process.stderr.write('[ERROR] self-test: ' + e.message + '\n');
    process.exit(1);
  }
}

if (require.main === module) main();