/**
 * 前端并行构建脚本
 *
 * 并行执行 client/ (SDK) 和 frontend/ (管理后台) 的 npm install + build，
 * 替代 pom.xml 中两个串行的 frontend-maven-plugin。
 *
 * 用法: node build-all.mjs [--skip-install]
 *   --skip-install  跳过 npm install（仅执行 build），热构建加速
 */

import { spawn } from 'node:child_process';
import { resolve, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
import { existsSync } from 'node:fs';

const __dirname = dirname(fileURLToPath(import.meta.url));
const ROOT = resolve(__dirname);

// 优先使用 Maven 安装的本地 Node.js/npm，保持版本一致
const isWindows = process.platform === 'win32';
const LOCAL_NPM = isWindows
  ? resolve(ROOT, 'node', 'npm.cmd')
  : resolve(ROOT, 'node', 'npm');

const NPM_EXE = existsSync(LOCAL_NPM) ? LOCAL_NPM : 'npm';

const SKIP_INSTALL = process.argv.includes('--skip-install');

const PROJECTS = [
  { name: 'client',   dir: resolve(ROOT, 'client') },
  { name: 'frontend', dir: resolve(ROOT, 'frontend') },
];

/**
 * 在指定目录执行 npm 命令，返回 Promise。
 * 将 stdout/stderr 实时转发到控制台，带项目前缀。
 */
function runNpm(cwd, args, label) {
  return new Promise((resolvePromise, reject) => {
    const child = spawn(NPM_EXE, args, {
      cwd,
      shell: isWindows, // Windows 需要 shell 才能找到 npm.cmd
      stdio: ['ignore', 'pipe', 'pipe'],
      env: { ...process.env },
    });

    child.stdout.on('data', (data) => {
      process.stdout.write(`[${label}] ${data}`);
    });
    child.stderr.on('data', (data) => {
      process.stderr.write(`[${label}] ${data}`);
    });

    child.on('close', (code) => {
      if (code === 0) {
        console.log(`[${label}] ✓ 完成`);
        resolvePromise();
      } else {
        reject(new Error(`[${label}] 失败，退出码: ${code}`));
      }
    });

    child.on('error', (err) => {
      reject(new Error(`[${label}] 启动失败: ${err.message}`));
    });
  });
}

async function main() {
  const startTime = Date.now();

  // ===== Phase 1: npm install（两个项目并行） =====
  if (!SKIP_INSTALL) {
    console.log('\n=== Phase 1: npm install ===');
    const installResults = await Promise.allSettled(
      PROJECTS.map((p) =>
        runNpm(p.dir, ['install', '--prefer-offline', '--no-audit', '--no-fund'], p.name)
      )
    );
    for (const r of installResults) {
      if (r.status === 'rejected') throw r.reason;
    }
  } else {
    console.log('\n=== Phase 1: 跳过 npm install（--skip-install） ===');
  }

  // ===== Phase 2: npm run build（两个项目并行） =====
  console.log('\n=== Phase 2: npm run build ===');
  const buildResults = await Promise.allSettled(
    PROJECTS.map((p) => runNpm(p.dir, ['run', 'build'], p.name))
  );
  for (const r of buildResults) {
    if (r.status === 'rejected') throw r.reason;
  }

  const elapsed = ((Date.now() - startTime) / 1000).toFixed(1);
  console.log(`\n✓ 全部前端构建完成 (${elapsed}s)`);
}

main().catch((err) => {
  console.error(`\n✗ 前端构建失败: ${err.message}`);
  process.exit(1);
});