import { mkdtemp, rm, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { afterEach, describe, expect, it } from "vitest";
import { NodeProjectProbe } from "./node-project-probe.ts";

const tempDirs: string[] = [];

async function createTempDir(): Promise<string> {
	const dir = await mkdtemp(join(tmpdir(), "pi-test-node-project-probe-"));
	tempDirs.push(dir);
	return dir;
}

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

describe("NodeProjectProbe", () => {
	it("returns true when a path exists", async () => {
		const dir = await createTempDir();
		const filePath = join(dir, "go.mod");
		await writeFile(filePath, "module example.com/service\n", "utf8");

		const probe = new NodeProjectProbe();

		await expect(probe.exists(filePath)).resolves.toBe(true);
	});

	it("returns false when a path does not exist", async () => {
		const dir = await createTempDir();
		const missingPath = join(dir, "go.work");

		const probe = new NodeProjectProbe();

		await expect(probe.exists(missingPath)).resolves.toBe(false);
	});

	it("returns false instead of throwing when a parent directory does not exist", async () => {
		const dir = await createTempDir();
		const missingPath = join(dir, "missing", "go.mod");

		const probe = new NodeProjectProbe();

		await expect(probe.exists(missingPath)).resolves.toBe(false);
	});
});