/**
 * Prepare the HMDesign submodule for this app (runs as `postinstall`, or `npm run hm:build`).
 *
 * HMDesign is consumed as a git submodule (vendor/HMDesign) whose `packages/ui` is an npm workspace of this
 * repo, so `@hm-design/ui` resolves to vendor/HMDesign/packages/ui and its dependencies are installed into
 * this repo's node_modules. The package exports compiled `dist/` (JS, types, theme CSS, fonts), which Git
 * does not carry, so it has to be built once after install.
 *
 * HMDesign's own package build (vendor/HMDesign/scripts/build-package.mjs) reads TypeScript and shadcn from
 * `<HMDesign root>/node_modules/...` by absolute path. Instead of a second full `npm ci` inside the submodule
 * (Storybook and friends), point that folder at this repo's node_modules with a directory junction. The
 * submodule's .gitignore already ignores node_modules/, so its working tree stays clean.
 *
 * Nothing inside the submodule is edited.
 */
import { existsSync, lstatSync, symlinkSync, statSync } from "node:fs"
import path from "node:path"
import { fileURLToPath } from "node:url"
import { execFileSync } from "node:child_process"

const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..")
const hm = path.join(root, "vendor", "HMDesign")
const uiPkg = path.join(hm, "packages", "ui")
const force = process.argv.includes("--force")

if (!existsSync(path.join(uiPkg, "package.json"))) {
  console.error("[setup-hmdesign] vendor/HMDesign is empty. Run: git submodule update --init --recursive")
  process.exit(1)
}

const hmNodeModules = path.join(hm, "node_modules")
const rootNodeModules = path.join(root, "node_modules")
if (!existsSync(hmNodeModules)) {
  symlinkSync(rootNodeModules, hmNodeModules, "junction")
  console.log("[setup-hmdesign] linked vendor/HMDesign/node_modules -> node_modules")
} else if (!lstatSync(hmNodeModules).isSymbolicLink()) {
  console.log("[setup-hmdesign] vendor/HMDesign/node_modules is a real folder; using it as is")
}

const distEntry = path.join(uiPkg, "dist", "index.js")
const srcIndex = path.join(uiPkg, "src", "index.ts")
const stale = !existsSync(distEntry) || statSync(srcIndex).mtimeMs > statSync(distEntry).mtimeMs
if (force || stale) {
  console.log("[setup-hmdesign] building @hm-design/ui (vendor/HMDesign/packages/ui/dist)")
  execFileSync(process.execPath, [path.join(hm, "scripts", "build-package.mjs"), "ui"], { cwd: uiPkg, stdio: "inherit" })
} else {
  console.log("[setup-hmdesign] @hm-design/ui dist is up to date")
}