import fs from "node:fs";
import path from "node:path";

export interface DocMeta {
  slug: string;
  title: string;
  description: string;
  file: string;
}

export const DOCS: DocMeta[] = [
  {
    slug: "api",
    title: "API Reference",
    description:
      "REST and WebSocket endpoints, auth, and request/response shapes.",
    file: "API.md",
  },
  {
    slug: "config",
    title: "Config Reference",
    description:
      "Every field in triggershell.yml: server, auth, scripts, and variables.",
    file: "CONFIG_REFERENCE.md",
  },
];

export function getDocMeta(slug: string): DocMeta | undefined {
  return DOCS.find((doc) => doc.slug === slug);
}

// Resolved from TRIGGERSHELL_APP_ROOT (set once in server.ts), not `process.cwd()` or
// `import.meta.dirname` - this file is read from a Route Handler compiled through Next's own
// module graph, which is a separate module instantiation from server.ts and doesn't preserve
// source-relative `import.meta` paths (see the `globalThis` comment in `runner/events.ts`).
// Falls back to a source-relative resolution for contexts where server.ts never ran (e.g. tests).
function docsDir(): string {
  const appRoot =
    process.env.TRIGGERSHELL_APP_ROOT ??
    path.resolve(import.meta.dirname, "..", "..");
  return path.resolve(appRoot, "docs");
}

export function readDocContent(doc: DocMeta): string | null {
  const filePath = path.join(docsDir(), doc.file);
  if (!fs.existsSync(/*turbopackIgnore: true*/ filePath)) return null;
  return fs.readFileSync(/*turbopackIgnore: true*/ filePath, "utf-8");
}