import { readdirSync, readFileSync, statSync } from "node:fs";
import { join } from "node:path";
import { describe, expect, it } from "vitest";

const SHELL_ROOT = join(import.meta.dirname, "../../../apps/web/src/pages");

/** Primary shell surfaces must not use sub-label pixel typography. */
const FORBIDDEN_PRIMARY = [/text-\[(9|10|11)px\]/, /\bsize=\{(9|10|11|12|13)\}/];

function walk(dir: string, out: string[] = []): string[] {
  for (const entry of readdirSync(dir)) {
    const path = join(dir, entry);
    if (statSync(path).isDirectory()) {
      walk(path, out);
    } else if (/\.tsx$/.test(entry) && !/\.test\.tsx$/.test(entry)) {
      out.push(path);
    }
  }
  return out;
}

describe("ui scale guard — primary shell surfaces", () => {
  const shellFiles = walk(SHELL_ROOT);

  it("has shell files to scan", () => {
    expect(shellFiles.length).toBeGreaterThan(5);
  });

  for (const file of shellFiles) {
    const rel = file.replace(`${SHELL_ROOT}/`, "");
    it(`${rel} avoids ultra-small primary UI classes`, () => {
      const content = readFileSync(file, "utf8");
      for (const pattern of FORBIDDEN_PRIMARY) {
        expect(content, pattern.toString()).not.toMatch(pattern);
      }
    });
  }
});