import { mkdtemp, mkdir, rm, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { afterEach, describe, expect, it } from "vitest";
import { findMissingLocalImports } from "./local-imports";

const roots: string[] = [];

afterEach(async () => {
  await Promise.all(roots.splice(0).map((root) => rm(root, { recursive: true, force: true })));
});

describe("findMissingLocalImports", () => {
  it("reports unresolved alias imports and ignores modules that exist", async () => {
    const root = await mkdtemp(join(tmpdir(), "epicnext-imports-"));
    roots.push(root);
    await mkdir(join(root, "src", "features"), { recursive: true });
    await mkdir(join(root, "src", "components", "ui"), { recursive: true });
    await writeFile(join(root, "src", "components", "ui", "card.tsx"), "export const Card = {};\n");
    await writeFile(
      join(root, "src", "features", "page.tsx"),
      [
        'import { Card } from "@/components/ui/card";',
        'import { Button } from "@/components/ui/button";',
        "export default Card;",
      ].join("\n"),
    );

    await expect(findMissingLocalImports(root)).resolves.toEqual([
      {
        importer: "src/features/page.tsx",
        specifier: "@/components/ui/button",
      },
    ]);
  });
});