import assert from "node:assert/strict";
import { dirname, relative, resolve, sep } from "node:path";
import { fileURLToPath } from "node:url";
import { resolveConfig } from "vite";

const webuiRoot = fileURLToPath(new URL("..", import.meta.url));

function contains(parent, candidate) {
  const suffix = relative(parent, candidate);
  return suffix === "" || (!suffix.startsWith(`..${sep}`) && suffix !== ".." && !suffix.startsWith(sep));
}

// Resolve the real Vite configurations without creating a server, optimizing
// dependencies, or changing any existing development/browser-test cache.
const app = await resolveConfig({
  root: webuiRoot,
  configFile: resolve(webuiRoot, "vite.config.ts")
}, "serve");
const conformance = await resolveConfig({
  root: webuiRoot,
  configFile: resolve(webuiRoot, "vite.conformance.config.ts")
}, "serve");

assert.notEqual(app.cacheDir, conformance.cacheDir,
  "Browser conformance must never replace the running application's optimized dependencies.");
assert.ok(!contains(app.cacheDir, conformance.cacheDir) && !contains(conformance.cacheDir, app.cacheDir),
  "Neither cache may own the other cache's directory: optimizer cleanup must remain isolated.");
assert.equal(dirname(app.cacheDir), dirname(conformance.cacheDir),
  "Product and conformance use explicit sibling cache directories.");
assert.ok(contains(resolve(webuiRoot, "node_modules"), app.cacheDir),
  "The application cache remains generated local dependency state.");
assert.ok(contains(resolve(webuiRoot, "node_modules"), conformance.cacheDir),
  "The conformance cache remains generated local dependency state.");
assert.ok(app.optimizeDeps.include.includes("@xyflow/react"),
  "Lazy Workflow and Dataflow graph imports are prebundled before their first visit.");
assert.ok(app.optimizeDeps.include.includes("read-excel-file/browser"),
  "Deferred spreadsheet imports remain prebundled.");
assert.ok(app.optimizeDeps.include.includes("@tiptap/react"),
  "Deferred rich-text editors remain prebundled.");

console.log("Vite product/conformance dependency-cache isolation passed.");