import { defineConfig, type Plugin } from 'vitest/config'
import vue from '@vitejs/plugin-vue'
import { resolve } from 'path'

/**
 * Vite 的 SSR 变换用 `/^#!.*\n/` 识别 shebang，并把 import 声明提升到它前面。
 * 这个正则只在 LF 工作区成立：`.` 不匹配 `\r`，所以 CRLF checkout（Windows 默认
 * core.autocrlf=true）下 shebang 识别失败，import 被提升到 `#!/usr/bin/env node`
 * 之前，shebang 落到文件中部，运行期直接抛 "Invalid or unexpected token"。
 *
 * 统一在 SSR 变换之前剥掉 shebang：它只对「直接执行」有意义，测试里不需要。
 */
function stripShebang(): Plugin {
  return {
    name: 'hermes:strip-shebang',
    enforce: 'pre',
    transform(code, id) {
      if (!code.startsWith('#!')) return null
      const newline = code.indexOf('\n')
      return { code: newline === -1 ? '' : code.slice(newline + 1), map: null }
    },
  }
}

export default defineConfig({
  plugins: [stripShebang(), vue()],
  resolve: {
    alias: {
      '@': resolve(__dirname, 'packages/client/src'),
      '/logo.png': resolve(__dirname, 'packages/client/public/logo.png'),
    },
  },
  test: {
    include: ['tests/**/*.test.ts'],
    setupFiles: ['tests/setup.ts'],
    coverage: {
      // Without an explicit include, v8 coverage walks the whole project root.
      // While the read-only reference_code/ checkout was present that pulled in
      // ~570 of its files and diluted every percentage below.
      provider: 'v8',
      include: ['packages/*/src/**'],
      exclude: ['**/vendor/**', '**/*.d.ts'],
    },
  },
})