/// <reference types="vitest" />

import path from 'node:path';
import fs from 'node:fs/promises';

import react from '@vitejs/plugin-react';
import svgr from 'vite-plugin-svgr';
import {
  defineConfig,
  configDefaults,
  UserConfigFnPromise,
} from 'vitest/config';
import postcssPresetEnv from 'postcss-preset-env';

import { manifestSRI } from './config/vite/plugin-manifest-sri';

const entrypointRoot = path.resolve(__dirname, 'app/javascript/entrypoints');

const config: UserConfigFnPromise = async () => {
  const entrypointFiles = await fs.readdir(entrypointRoot);
  const entrypoints: Record<string, string> = entrypointFiles.reduce(
    (acc, file) => {
      const name = path.basename(file).replace(/\.tsx?$/, '');
      acc[name] = path.resolve(entrypointRoot, file);
      return acc;
    },
    {} as Record<string, string>,
  );
  return {
    root: path.resolve(__dirname, 'app/javascript'),
    css: {
      postcss: {
        plugins: [
          postcssPresetEnv({
            features: {
              'logical-properties-and-values': false,
            },
          }),
        ],
      },
    },
    resolve: {
      alias: {
        mastodon: path.resolve(__dirname, 'app/javascript/mastodon'),
        '@': path.resolve(__dirname, 'app/javascript'),
      },
    },
    build: {
      commonjsOptions: { transformMixedEsModules: true },
      outDir: path.resolve(__dirname, '.dist'),
      emptyOutDir: true,
      manifest: 'manifest.json',
      rollupOptions: {
        input: entrypoints,
        output: {
          chunkFileNames(chunkInfo) {
            if (!chunkInfo.facadeModuleId) {
              return '[name]-[hash].js';
            }
            if (
              /mastodon\/locales\/[a-zA-Z-]+\.json/.exec(
                chunkInfo.facadeModuleId,
              )
            ) {
              // put all locale files in `intl/`
              return `intl/[name]-[hash].js`;
            } else if (
              /node_modules\/@formatjs\//.exec(chunkInfo.facadeModuleId)
            ) {
              // use a custom name for formatjs polyfill files
              const name = /node_modules\/@formatjs\/([^/]+)\//.exec(
                chunkInfo.facadeModuleId,
              );

              if (name?.[1]) {
                return `intl/[name]-${name[1]}-[hash].js`;
              }
            } else if (chunkInfo.name === 'index' && chunkInfo.facadeModuleId) {
              // Use a custom name for chunks, to avoid having too many of them called "index"
              const parts = chunkInfo.facadeModuleId.split('/');

              const parent = parts.at(-2);

              if (parent) {
                return `${parent}-[name]-[hash].js`;
              }
            }
            return `[name]-[hash].js`;
          },
        },
      },
    },
    plugins: [react(), svgr(), manifestSRI()],
    test: {
      environment: 'jsdom',
      include: [
        ...configDefaults.include,
        '**/__tests__/**/*.{js,mjs,cjs,ts,mts,cts,jsx,tsx}',
      ],
      exclude: [
        ...configDefaults.exclude,
        '**/node_modules/**',
        'vendor/**',
        'config/**',
        'log/**',
        'public/**',
        'tmp/**',
      ],
      globals: true,
    },
  };
};

export default defineConfig(config);