import { afterEach, describe, expect, it } from "bun:test";
import { existsSync, rmSync } from "node:fs";
import { fetchImageFromUrl } from "../../src/server/services/image.service.ts";

const TEST_UPLOADS_DIR = "test-uploads";

describe("Image Service", () => {
	afterEach(() => {
		if (existsSync(TEST_UPLOADS_DIR)) {
			rmSync(TEST_UPLOADS_DIR, { recursive: true });
		}
	});

	describe("fetchImageFromUrl", () => {
		it("fetches a valid image URL and saves to disk", async () => {
			const imageUrl =
				"https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png";
			const result = await fetchImageFromUrl(imageUrl, TEST_UPLOADS_DIR);

			expect(result.filename).toMatch(/^\d+-[\w-]+\.png$/);
			expect(result.sourceUrl).toBe(imageUrl);

			const filePath = `${TEST_UPLOADS_DIR}/${result.filename}`;
			expect(existsSync(filePath)).toBe(true);
		});

		it("rejects non-image content type", async () => {
			await expect(
				fetchImageFromUrl("https://example.com/", TEST_UPLOADS_DIR),
			).rejects.toThrow("Invalid content type");
		});

		it("rejects invalid URL format", async () => {
			await expect(
				fetchImageFromUrl("not-a-url", TEST_UPLOADS_DIR),
			).rejects.toThrow("Invalid URL format");
		});

		it("rejects non-HTTP protocols", async () => {
			await expect(
				fetchImageFromUrl("ftp://example.com/image.png", TEST_UPLOADS_DIR),
			).rejects.toThrow("URL must use HTTP or HTTPS");
		});
	});
});