#!/usr/bin/env node
'use strict';

/**
 * 配置 LibreDesk 通知邮件（SMTP）。默认使用旧项目的 163 授权码。
 * 修改后 LibreDesk 需要重启才能生效（脚本最后会重启容器）。
 *
 * 用法：node scripts/configure-email.js
 */
const fs = require('fs');
const path = require('path');
const { execFileSync } = require('child_process');

const ROOT = path.resolve(__dirname, '..');
const OLD_MAIL_CFG = '/home/dev/code/crm/crm-ai-demo/bridge/mail.config.json';

function loadEnv(file) {
  const out = {};
  for (const line of fs.readFileSync(file, 'utf8').split('\n')) {
    const t = line.trim();
    if (!t || t.startsWith('#')) continue;
    const eq = t.indexOf('=');
    if (eq < 0) continue;
    let v = t.slice(eq + 1).trim();
    if ((v.startsWith('"') && v.endsWith('"')) || (v.startsWith("'") && v.endsWith("'"))) v = v.slice(1, -1);
    out[t.slice(0, eq).trim()] = v;
  }
  return out;
}

function createClient(baseURL) {
  const cookies = new Map();
  let csrf = '';
  const cookieHeader = () => [...cookies.entries()].map(([k, v]) => `${k}=${v}`).join('; ');
  function store(res) {
    const list = typeof res.headers.getSetCookie === 'function' ? res.headers.getSetCookie() : [res.headers.get('set-cookie')].filter(Boolean);
    for (const c of list) {
      const [pair] = c.split(';');
      const eq = pair.indexOf('=');
      if (eq > 0) {
        const k = pair.slice(0, eq).trim();
        const v = pair.slice(eq + 1).trim();
        cookies.set(k, v);
        if (k === 'csrf_token') csrf = v;
      }
    }
  }
  async function req(method, p, body) {
    const headers = { Accept: 'application/json' };
    if (cookies.size) headers.Cookie = cookieHeader();
    if (body !== undefined) headers['Content-Type'] = 'application/json';
    if (csrf && method !== 'GET') headers['X-CSRFTOKEN'] = csrf;
    const res = await fetch(baseURL + p, { method, headers, body: body === undefined ? undefined : JSON.stringify(body) });
    store(res);
    const text = await res.text();
    let json = null;
    try { json = text ? JSON.parse(text) : null; } catch { /* ignore */ }
    if (!res.ok) throw new Error(`${method} ${p} -> HTTP ${res.status}: ${(json && json.message) || text.slice(0, 300)}`);
    return json;
  }
  return { post: (p, b) => req('POST', p, b), get: (p) => req('GET', p), put: (p, b) => req('PUT', p, b) };
}

async function main() {
  const env = loadEnv(path.join(ROOT, '.env'));
  const base = (env.LIBREDESK_BASE_URL || 'http://192.168.31.61:9000').replace(/\/+$/, '');

  // 163 凭据：优先 .env 覆盖，否则读旧项目 mail.config.json
  let user = env.SMTP_USER;
  let pass = env.SMTP_PASS;
  let host = env.SMTP_HOST || 'smtp.163.com';
  let port = Number(env.SMTP_PORT || 465);
  let from = env.SMTP_FROM;
  if ((!user || !pass) && fs.existsSync(OLD_MAIL_CFG)) {
    const old = JSON.parse(fs.readFileSync(OLD_MAIL_CFG, 'utf8'));
    user = user || old.smtp?.auth?.user;
    pass = pass || old.smtp?.auth?.pass;
    host = host || old.smtp?.host;
    port = port || old.smtp?.port;
    from = from || old.smtp?.from;
  }
  if (!user || !pass) throw new Error('缺少 SMTP 凭据：设置 SMTP_USER/SMTP_PASS 或确认旧 mail.config.json 存在');

  const c = createClient(base);
  await c.post('/api/v1/auth/login', { email: env.LIBREDESK_SYSTEM_EMAIL || 'System', password: env.LIBREDESK_SYSTEM_USER_PASSWORD });
  console.log('登录成功');

  const payload = {
    'notification.email.username': user,
    'notification.email.host': host,
    'notification.email.port': port,
    'notification.email.password': pass,
    'notification.email.email_address': from,
    'notification.email.enabled': true,
    'notification.email.tls_type': 'tls',
    'notification.email.auth_protocol': 'plain',
    'notification.email.max_conns': 5,
    'notification.email.idle_timeout': '30s',
    'notification.email.wait_timeout': '10s',
    'notification.email.max_msg_retries': 3,
    'notification.email.tls_skip_verify': false,
    'notification.email.hello_hostname': '',
  };
  await c.put('/api/v1/settings/notifications/email', payload);
  console.log(`已保存 SMTP：${host}:${port} user=${user} from=${from}`);

  console.log('重启 LibreDesk 使配置生效…');
  execFileSync('docker', ['compose', 'restart', 'libredesk'], { cwd: ROOT, stdio: 'inherit' });
  console.log('完成。');
}

main().catch((err) => {
  console.error('[configure-email]', err.message);
  process.exit(1);
});