#!/usr/bin/env node
/**
 * fmode-skills installer.mjs
 * 检测宿主 Agent，把仓库内 skills/ 下所有子技能分发到宿主技能目录。
 * Copyright (c) 未来飞马  MPL-2.0
 *
 * 用法：
 *   node installer.mjs --all      分发全部子技能到检测到的宿主目录
 *   node installer.mjs --check    检查现状（只读，不写文件）
 *   node installer.mjs --host wb  指定宿主 wb|cc|hermes（跳过自动检测）
 */
import { existsSync, readdirSync, mkdirSync, cpSync, writeFileSync } from 'node:fs';
import { join, dirname } from 'node:path';
import { homedir } from 'node:os';
import { fileURLToPath } from 'node:url';

const __dirname = dirname(fileURLToPath(import.meta.url));
const ROOT = join(__dirname, '..');
const SKILLS_DIR = join(ROOT, 'skills');

// 宿主 -> 技能目录 映射（ESM 技能放在各宿主全局技能位置）
const HOSTS = {
  wb:     { name: 'WorkBuddy',   dir: () => join(homedir(), '.workbuddy', 'skills') },
  cc:     { name: 'Claude Code', dir: () => join(homedir(), '.claude', 'skills') },
  hermes: { name: 'Hermes Agent', dir: () => join(homedir(), '.hermes', 'skills') },
};

function detectHost() {
  // 探测哪个宿主目录存在
  if (existsSync(join(homedir(), '.workbuddy', 'skills')) ||
      existsSync(join(homedir(), '.workbuddy'))) return 'wb';
  if (existsSync(join(homedir(), '.claude', 'skills')) ||
      existsSync(join(homedir(), '.claude')) ||
      process.env.CLAUDE_CODE_ENTRYPOINT) return 'cc';
  if (existsSync(join(homedir(), '.hermes', 'skills')) ||
      process.env.HERMES_HOME) return 'hermes';
  return 'cc'; // 默认 Claude-compatible
}

function listSkills() {
  if (!existsSync(SKILLS_DIR)) return [];
  return readdirSync(SKILLS_DIR, { withFileTypes: true })
    .filter(e => e.isDirectory())
    .map(e => e.name)
    .filter(n => n.startsWith('fmode-'));
}

function main() {
  const args = process.argv.slice(2);
  const check = args.includes('--check');
  const hostArg = args.find(a => a.startsWith('--host'));
  const hostKey = (hostArg ? hostArg.split('=')[1] || process.argv[process.argv.indexOf(hostArg)+1] : detectHost()) || detectHost();
  const host = HOSTS[hostKey];
  if (!host) { console.error(`未知宿主: ${hostKey}`); process.exit(1); }

  const skills = listSkills();
  console.log(`[fmode-skills] 检测到宿主: ${host.name}`);
  console.log(`[fmode-skills] 发现子技能: ${skills.length} 个 -> ${skills.join(', ')}`);
  if (skills.length === 0) { console.error('未找到子技能（打开 /skills 目录检查）'); process.exit(1); }

  if (check) {
    const target = host.dir();
    console.log(`[check] 目标目录: ${target}`);
    console.log(`[check] 已存在: ${Object.keys(HOSTS).map(k => `${k}:${existsSync(join(homedir(), k === 'wb' ? '.workbuddy' : k === 'cc' ? '.claude' : '.hermes'))}`).join(' ')}`);
    process.exit(0);
  }

  const target = host.dir();
  console.log(`[fmode-skills] 安装到: ${target}`);
  const installed = [];
  for (const skill of skills) {
    const src = join(SKILLS_DIR, skill);
    const dest = join(target, skill);
    if (!existsSync(src)) continue;
    mkdirSync(target, { recursive: true });
    cpSync(src, dest, { recursive: true, force: true });
    installed.push(skill);
  }
  writeFileSync(join(target, 'fmode-skills.installed.json'), JSON.stringify({
    installedAt: new Date().toISOString(),
    host: hostKey,
    count: installed.length,
    skills: installed,
  }, null, 2));
  console.log(`✅ 安装完成: ${installed.length} 个子技能已落盘到 ${target}`);
  console.log(`清单: fmode-skills.installed.json`);
}

main();