import { fileURLToPath } from 'node:url'
import { mergeConfig, defineConfig, configDefaults, type ViteUserConfig } from 'vitest/config'
import type { UserConfig } from 'vite'
import viteConfig from './vite.config'

export default defineConfig((env) => {
  const baseConfig = viteConfig(env)
  if (!baseConfig) {
    throw new Error('viteConfig(env) did not return a config object')
  }

  const mergeCfg = mergeConfig<UserConfig, ViteUserConfig>(baseConfig, {
    test: {
      environment: 'jsdom',
      exclude: [...configDefaults.exclude, 'e2e/**'],
      root: fileURLToPath(new URL('./', import.meta.url)),
    },
  })
  if (!mergeCfg) {
    throw new Error('mergeConfig did not return a config object')
  }

  return {
    ...baseConfig,
    test: {
      environment: 'jsdom',
      exclude: [...configDefaults.exclude, 'e2e/**'],
      root: fileURLToPath(new URL('./', import.meta.url)),
    },
  }
})