import assert from "node:assert/strict";
import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import { afterEach, describe, it } from "node:test";
import { getFilesWithFS } from "./getFilesWithFS";

describe("getFilesWithFS", () => {
  let tempDir = "";

  afterEach(async () => {
    if (tempDir) {
      await fs.rm(tempDir, { recursive: true, force: true });
      tempDir = "";
    }
  });

  it("throws when dir is empty", async () => {
    await assert.rejects(async () => getFilesWithFS(""));
  });

  it("reads files recursively and applies filter", async () => {
    tempDir = await fs.mkdtemp(path.join(os.tmpdir(), "delement-utils-"));
    const nestedDir = path.join(tempDir, "nested");
    // eslint-disable-next-line security/detect-non-literal-fs-filename
    await fs.mkdir(nestedDir);

    const firstFile = path.join(tempDir, "one.txt");
    const secondFile = path.join(nestedDir, "two.json");
    // eslint-disable-next-line security/detect-non-literal-fs-filename
    await fs.writeFile(firstFile, "one");
    // eslint-disable-next-line security/detect-non-literal-fs-filename
    await fs.writeFile(secondFile, "two");

    const files = await getFilesWithFS(tempDir, (file) => file.endsWith(".json"));

    assert.strictEqual(files.length, 1);
    assert.strictEqual(files[0], secondFile);
  });
});