import { defineConfig } from "astro/config";
import starlight from "@astrojs/starlight";

// The site is served at the root of its own subdomain. Set COURSE_HOST at build time
// (e.g. COURSE_HOST=course.example.com). Unset means a local run (http://localhost:4321);
// deploys must not rely on this: deploy/Dockerfile and docker-compose.yml require COURSE_HOST.
const host = process.env.COURSE_HOST;

export default defineConfig({
  site: host ? `https://${host}` : "http://localhost:4321",
  base: "/",
  integrations: [
    starlight({
      title: "Systemic Design Course",
      description: "A free, hands-on course on extensible systemic game design, in Rust and TypeScript.",
      social: [
        {
          icon: "external",
          label: "Source repository",
          href: "https://gitea.lucaswinther.info/lucasw89/systemic-game-design-course",
        },
      ],
      sidebar: [
        { label: "Start here", items: ["disclaimer", "about"] },
        { label: "Modules", items: [{ autogenerate: { directory: "course" } }] },
      ],
    }),
  ],
});