#!/usr/bin/env node
import { join } from 'node:path';
import { pathToFileURL } from 'node:url';
import { SEED_DIR, GAMES_DIR, FRAMEWORK_SRC } from './lib/paths.mjs';
import { copySeed, setProjectIdentity, scaffoldGameAssets } from './lib/scaffold.mjs';
import { ensureJunction } from './lib/junction.mjs';

const NAME_RE = /^[a-z0-9][a-z0-9_-]*$/;

// 新建一款子游戏工程。opts 可注入路径用于测试。
export function newGame(name, opts = {}) {
  const seedDir = opts.seedDir ?? SEED_DIR;
  const gamesDir = opts.gamesDir ?? GAMES_DIR;
  const frameworkSrc = opts.frameworkSrc ?? FRAMEWORK_SRC;

  if (!name || !NAME_RE.test(name)) {
    throw new Error(`非法子游戏名称: "${name}"（仅限小写字母/数字/-/_，且以字母数字开头）`);
  }
  const projectDir = join(gamesDir, name);

  copySeed(seedDir, projectDir); // 目标已存在会抛错
  setProjectIdentity(projectDir, name);
  scaffoldGameAssets(projectDir, name);
  const link = join(projectDir, 'assets', 'framework');
  ensureJunction(link, frameworkSrc);

  return { projectDir, link };
}

// CLI 入口
if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
  const name = process.argv[2];
  if (!name) {
    console.error('用法: npm run new-game <name>');
    process.exit(1);
  }
  const { projectDir } = newGame(name);
  console.log(`已创建子游戏工程: ${projectDir}`);
  console.log(`下一步: 用 Cocos Creator 打开该目录`);
}