import assert from "node:assert/strict";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import { afterEach, beforeAll, describe, it, vi } from "vitest";

vi.mock("@toolctrl/ui-mock", async () => import("../packages/ui-mock/src/index.ts"));

let uiMockVisual: typeof import("./verify-ui-mock-visual.ts");

const fixtures: string[] = [];

function createFixture() {
  const rootDir = fs.mkdtempSync(path.join(os.tmpdir(), "ui-mock-visual-"));
  fixtures.push(rootDir);
  return rootDir;
}

afterEach(() => {
  while (fixtures.length > 0) {
    fs.rmSync(fixtures.pop()!, { recursive: true, force: true });
  }
});

beforeAll(async () => {
  uiMockVisual = await import("./verify-ui-mock-visual.ts");
});

describe("verify-ui-mock-visual", () => {
  it("generates a real hot-swap mock module, page, and snapshot", () => {
    const drill = uiMockVisual.buildUiMockVisualDrill();

    assert.match(drill.module, /export const mockPage/);
    assert.match(drill.module, /"route": "\/mock\/phase-c\/hot-swap"/);
    assert.match(drill.html, /data-ui-mock-page="phase-c-hot-swap"/);
    assert.match(drill.snapshot, /"pageId": "phase-c-hot-swap"/);
  });

  it("passes when committed static baselines match the generated drill", () => {
    const rootDir = createFixture();
    uiMockVisual.writeUiMockVisualBaseline(rootDir);

    const result = uiMockVisual.verifyUiMockVisualBaseline(rootDir);
    const output = uiMockVisual.formatUiMockVisualResult(result);

    assert.deepEqual(result.failures, []);
    assert.equal(result.passes.length, 7);
    assert.match(output, /^PASS UI mock static artifact baseline verification/);
    assert.match(output, /renders through JSDOM in CI/);
    assert.match(output, /rendered hot-swap navigation has exactly one active route/);
  });

  it("fails when the HTML visual baseline drifts", () => {
    const rootDir = createFixture();
    uiMockVisual.writeUiMockVisualBaseline(rootDir);
    fs.appendFileSync(path.join(rootDir, "packages/ui-mock/visual-baseline/hot-swap.html"), "\n<!-- drift -->\n", "utf8");

    const result = uiMockVisual.verifyUiMockVisualBaseline(rootDir);

    assert.match(result.failures.join("\n"), /hot-swap\.html: static artifact baseline drifted/);
  });

  it("blocks visual baseline update mode when CI is set", () => {
    assert.throws(
      () => uiMockVisual.assertVisualBaselineUpdateAllowed({ CI: "true" }),
      /Refusing to update UI mock static artifact baselines while CI is set\./,
    );
  });
});