import { describe, it, expect, beforeAll, afterAll } from "vitest";
import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";

import { GET as getMonths } from "./route.js";

let tmpRoot;

beforeAll(async () => {
	tmpRoot = await fs.mkdtemp(path.join(os.tmpdir(), "api-months-"));
	process.env.NAS_ROOT_PATH = tmpRoot;

	// tmpRoot/NL01/2024/10
	await fs.mkdir(path.join(tmpRoot, "NL01", "2024", "10"), {
		recursive: true,
	});
});

afterAll(async () => {
	await fs.rm(tmpRoot, { recursive: true, force: true });
});

describe("GET /api/branches/[branch]/[year]/months", () => {
	it("returns months for a valid branch/year", async () => {
		const req = new Request("http://localhost/api/branches/NL01/2024/months");
		const ctx = {
			params: Promise.resolve({ branch: "NL01", year: "2024" }),
		};

		const res = await getMonths(req, ctx);
		expect(res.status).toBe(200);

		const body = await res.json();
		expect(body).toEqual({
			branch: "NL01",
			year: "2024",
			months: ["10"],
		});
	});

	it("returns 400 when branch or year is missing", async () => {
		const req = new Request("http://localhost/api/branches/NL01/2024/months");
		const ctx = {
			params: Promise.resolve({ branch: "NL01" }), // year missing
		};

		const res = await getMonths(req, ctx);
		expect(res.status).toBe(400);

		const body = await res.json();
		expect(body.error).toBe("branch oder year fehlt");
	});
});