import { globSync } from 'node:fs';
import { dirname, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';
import type { UserConfig } from 'tsdown';
import { defineConfig } from 'tsdown';
import { copyCssPlugin } from '../../build/plugins/copy-css-plugin.ts';
import { inlineCssPlugin } from '../../build/plugins/inline-css-plugin.ts';
import { inlineTemplatePlugin } from '../../build/plugins/inline-template-plugin.ts';
import { isDevBuildMode, type PackageBuildMode, packageBuildConfig, packageBuildModes } from '../../build/tsdown.ts';
import { LOCALES, localeAliases } from '../core/src/core/i18n/locales.ts';

const skinsDir = resolve(dirname(fileURLToPath(import.meta.url)), '../skins/src');

const localeTags = [...LOCALES, ...localeAliases(LOCALES)];

const defineEntries = Object.fromEntries(
  globSync('src/define/**/*.ts')
    .filter((file) => !file.includes('.test.'))
    .map((file) => {
      const key = file.replace('src/', '').replace('.ts', '');
      return [key, file];
    })
);

const presetEntries = Object.fromEntries(
  globSync('src/presets/*.ts').map((file) => {
    const key = file.replace('src/', '').replace('.ts', '');
    return [key, file];
  })
);

const iconEntries = Object.fromEntries(
  globSync('src/icons/**/index.ts').map((file) => {
    const key = file.replace('src/', '').replace('.ts', '');
    return [key, file];
  })
);

const i18nLocaleEntries = Object.fromEntries([
  ['i18n/locales/all', 'src/i18n/locales/all.ts'],
  ['i18n/locales/all/register', 'src/i18n/locales/all/register.ts'],
  ['i18n/locales/en', 'src/i18n/locales/en.ts'],
  ['i18n/locales/en/register', 'src/i18n/locales/en/register.ts'],
  ...localeTags.map((tag) => [`i18n/locales/${tag}`, `src/i18n/locales/${tag}.ts`]),
  ...localeTags.map((tag) => [`i18n/locales/${tag}/register`, `src/i18n/locales/${tag}/register.ts`]),
]);

const createConfig = (mode: PackageBuildMode): UserConfig => ({
  ...packageBuildConfig(mode, 'browser'),
  entry: {
    index: 'src/index.ts',
    'i18n/index': 'src/i18n/index.ts',
    ...i18nLocaleEntries,
    ...iconEntries,
    ...defineEntries,
    ...presetEntries,
  },
  treeshake: {
    // The sideEffects field in package.json uses dist paths, but the build
    // runs against source. Ensure define/* modules (which register custom
    // elements as a side effect) are never tree-shaken from skin bundles.
    moduleSideEffects: [
      { test: /\/define\//, sideEffects: true },
      { test: /\/icons\/(?:dist\/)?element\//, sideEffects: true },
      { test: /\/i18n\/locales\/.+\/register/, sideEffects: true },
    ],
  },
  noExternal: [/^@videojs\/icons/, /^@videojs\/skins/],
  alias: {
    '@': new URL('./src', import.meta.url).pathname,
  },
  plugins: [
    copyCssPlugin({ skinsDir, outDir: `dist/${mode}` }),
    inlineCssPlugin({ skinsDir, minify: !isDevBuildMode(mode) }),
    inlineTemplatePlugin({ minify: !isDevBuildMode(mode) }),
  ],
});

export default defineConfig(packageBuildModes.map((mode) => createConfig(mode)));