import { describe, expect, it } from "vitest";

import { eslint } from "./lintProbe.testkit";

// The px-frozen BOX rule in eslint.config.js (beside the older `text-[Npx]` one). A `no-restricted-
// syntax` selector that matches nothing looks exactly like a clean codebase, so pin that it fires.

async function refused(source: string): Promise<number> {
  const [result] = await eslint.lintText(source, { filePath: "src/components/__probe.tsx" });
  return (result?.messages ?? []).filter((m) => m.message.startsWith("px-frozen box size")).length;
}

describe("a px-frozen box utility", () => {
  it("is refused in a string and in a template literal", async () => {
    // Assembled, so this file does not trip the very rule it probes.
    const px = (u: string, n: number) => `${u}-[${n}px]`;
    expect(await refused(`export const a = "group ${px("w", 150)} shrink-0";\n`)).toBe(1);
    expect(await refused("export const b = `x ${1} " + px("max-w", 240) + "`;\n")).toBe(1);
  });

  // A fractional size is as frozen as a whole one: `text-[9.5px]` sat in the Glass tuner past an
  // integer-only pattern (debt burn 2026-09).
  it("is refused with a fractional size, for a box and for a font", async () => {
    const px = (u: string, n: number) => `${u}-[${n}px]`;
    expect(await refused(`export const e = "${px("w", 12.5)}";\n`)).toBe(1);
    const [font] = await eslint.lintText(`export const f = "${px("text", 9.5)}";\n`, {
      filePath: "src/components/__probe.tsx",
    });
    expect(font?.messages.some((m) => m.message.startsWith("px-frozen font size"))).toBe(true);
  });

  it("leaves the spacing scale, a rem arbitrary and a grid track alone", async () => {
    expect(await refused('export const c = "w-37.5 max-w-60 text-[0.75rem]";\n')).toBe(0);
    expect(await refused('export const d = "grid-cols-[1fr_240px]";\n')).toBe(0);
  });
});