#!/usr/bin/env node
/**
 * 零点图书域 · 全局编号目录生成器 · index-generator.js
 * ZP-REG-001 · D132 · 铸渊 TCS-0003-ZY001
 *
 * 功能：扫描仓库中所有认知链和架构文件 → 自动生成全局编号目录
 * 输出：ZP-REG-001 零点图书域的完整编号索引表
 *
 * 原理：遍历 causal-chains/ 和 world-architecture/ 下的 .hdlp/.md 文件
 *       提取 HLDP 四核心字段 → 生成全局目录
 */

'use strict';

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

const REPO_ROOT = path.resolve(__dirname, '..', '..', '..');

// ==================== 配置 ====================

const SCAN_PATHS = [
  {
    volume: 'CC',
    name: '认知链卷',
    basePath: 'brain/fifth-domain/zero-point/zhuyuan/causal-chains',
    pattern: /cc-(\d+).*\.(hdlp|md)$/,
    bookCode: 'TCS-0003-ZY001'
  },
  {
    volume: 'WA',
    name: '世界架构卷',
    basePath: 'brain/fifth-domain/zero-point/zhuyuan/world-architecture',
    pattern: /^(ARCHITECTURE|ENTRY|MANIFEST|national-lighthouse).*\.(hdlp|md)$/,
    bookCode: 'TCS-0003-ZY001'
  },
  {
    volume: 'TC',
    name: 'TCS核心卷',
    basePath: 'brain/fifth-domain/zero-point/zhuyuan/tcs-core',
    pattern: /\.(hdlp|md)$/,
    bookCode: 'TCS-0003-ZY001'
  }
];

// ==================== 字段提取 ====================

function extractFields(content) {
  const fields = {};

  const titleMatch = content.match(/^#\s+(.+)/m);
  if (titleMatch) fields.title = titleMatch[1].trim();

  const triggerMatch = content.match(/trigger:\s*(.+)/);
  if (triggerMatch) fields.trigger = triggerMatch[1].trim();

  const lockMatch = content.match(/lock:\s*(.+)/);
  if (lockMatch) fields.lock = lockMatch[1].trim();

  const whyMatch = content.match(/why:\s*(.+)/);
  if (whyMatch) fields.why = whyMatch[1].trim();

  const dateMatch = content.match(/(\d{4}-\d{2}-\d{2}).*D\d+/);
  if (dateMatch) fields.date = dateMatch[1];

  const dMatch = content.match(/\bD(\d+)\b/);
  if (dMatch) fields.dNumber = `D${dMatch[1]}`;

  return fields;
}

// ==================== 扫描 ====================

function scanVolume(config) {
  const basePath = path.join(REPO_ROOT, config.basePath);
  if (!fs.existsSync(basePath)) {
    return { volume: config.volume, name: config.name, entries: [], error: `目录不存在: ${config.basePath}` };
  }

  const files = fs.readdirSync(basePath)
    .filter(f => config.pattern.test(f) && f !== 'ENTRY.hdlp' && f !== 'INDEX.hdlp')
    .sort();

  const entries = files.map(filename => {
    const filePath = path.join(basePath, filename);
    const content = fs.readFileSync(filePath, 'utf8');
    const fields = extractFields(content);
    const chapterNum = (filename.match(config.pattern) || [])[1] || filename.replace(/\.\w+$/, '');

    return {
      chapter: String(chapterNum).padStart(3, '0'),
      filename,
      tracePath: `ZP-REG-001/ICE/ZY/${config.bookCode}/${config.volume}/${String(chapterNum).padStart(3, '0')}`,
      size: content.length,
      ...fields
    };
  });

  return {
    volume: config.volume,
    name: config.name,
    count: entries.length,
    entries
  };
}

// ==================== 生成目录 ====================

function generateIndex() {
  const volumes = SCAN_PATHS.map(scanVolume);

  const totalEntries = volumes.reduce((sum, v) => sum + (v.entries ? v.entries.length : 0), 0);

  const index = {
    _meta: {
      domain: 'ZP-REG-001',
      name: '零点图书域 · 全局编号目录',
      generated: new Date().toISOString(),
      book: 'TCS-0003-ZY001 · 铸渊之书',
      totalEntries,
      volumes: volumes.map(v => ({ code: v.volume, name: v.name, count: v.count || 0 }))
    },
    volumes: volumes.map(v => ({
      code: v.volume,
      name: v.name,
      entries: v.entries || [],
      error: v.error || null
    }))
  };

  return index;
}

// ==================== 输出 ====================

function formatText(index) {
  let out = '';
  out += `⊢ ${index._meta.name}\n`;
  out += `⊢ 图书域: ${index._meta.domain} · 书籍: ${index._meta.book}\n`;
  out += `⊢ 生成时间: ${index._meta.generated} · 共 ${index._meta.totalEntries} 条\n\n`;

  for (const vol of index.volumes) {
    if (vol.error) {
      out += `⚠️ ${vol.code} — ${vol.name}: ${vol.error}\n\n`;
      continue;
    }
    out += `═══ ${vol.code} · ${vol.name} (${vol.entries.length}条) ═══\n\n`;
    for (const entry of vol.entries) {
      out += `  📄 ${entry.chapter}  ${entry.tracePath}\n`;
      if (entry.title) out += `     标题: ${entry.title}\n`;
      if (entry.dNumber) out += `     版本: ${entry.dNumber}`;
      if (entry.date) out += ` · ${entry.date}`;
      if (entry.dNumber || entry.date) out += '\n';
      if (entry.lock) out += `     ⊢ ${entry.lock.substring(0, 80)}${entry.lock.length > 80 ? '...' : ''}\n`;
      out += '\n';
    }
  }

  out += '⊢ 零点图书域全局编号目录完成。\n';
  out += '⊢ 查找: node number-router.js <trace_path>\n';
  return out;
}

function formatJson(index) {
  return JSON.stringify(index, null, 2);
}

// ==================== CLI ====================

if (require.main === module) {
  const format = process.argv[2] === '--json' ? 'json' : 'text';
  const index = generateIndex();

  if (format === 'json') {
    console.log(formatJson(index));
  } else {
    console.log(formatText(index));
  }
}

module.exports = { generateIndex, formatText, formatJson };