import './plugins/environment.mjs';
import { defineConfig } from 'astro/config';
import { unified } from '@astrojs/markdown-remark';
import documentLinks, { normalizeBase } from './plugins/document-links.mjs';

const base = normalizeBase(process.env.SITE_BASE || '/');
const site = process.env.SITE_URL || undefined;
if (site) {
  const url = new URL(site);
  if (!['http:', 'https:'].includes(url.protocol) || url.username || url.password || url.search || url.hash || url.pathname !== '/') {
    throw new Error('SITE_URL must be an http(s) origin; use SITE_BASE for a path prefix');
  }
}

export default defineConfig({
  output: 'static',
  site,
  base,
  trailingSlash: 'always',
  // Browser tests exercise the site, not the development toolbar overlay.
  devToolbar: { enabled: process.env.SITE_BROWSER_TEST !== '1' },
  markdown: {
    processor: unified({ remarkPlugins: [[documentLinks, { base }]], smartypants: false }),
    shikiConfig: { themes: { light: 'github-light', dark: 'github-dark' }, langAlias: { wip: 'text' } },
  },
});