import {
	describe,
	beforeAll,
	afterEach,
	afterAll,
	test,
	expect,
	vi
} from "vitest";

import { Client, client, duplicate } from "..";
import {
	transformed_api_info,
	config_response,
	response_api_info
} from "./test_data";
import { initialise_server } from "./server";
import { SPACE_METADATA_ERROR_MSG } from "../constants";

const app_reference = "hmb/hello_world";
const broken_app_reference = "hmb/bye_world";
const direct_app_reference = "https://hmb-hello-world.hf.space";
const secret_direct_app_reference = "https://hmb-secret-world.hf.space";

const server = initialise_server();

beforeAll(() => server.listen());
afterEach(() => server.resetHandlers());
afterAll(() => server.close());

describe("Client class", () => {
	describe("initialisation", () => {
		test("fetch is bound to the Client instance", async () => {
			const test = await Client.connect("hmb/hello_world");
			const fetch_method = test.fetch;
			const res = await fetch_method(direct_app_reference + "/info");

			await expect(res.json()).resolves.toEqual(response_api_info);
		});

		test("stream is bound to the Client instance", async () => {
			const test = await Client.connect("hmb/hello_world");
			const stream_method = test.stream;
			const url = new URL(`${direct_app_reference}/queue/data`);
			const stream = stream_method(url);

			expect(stream).toBeDefined();
			expect(stream.onmessage).toBeDefined();
		});

		test("backwards compatibility of client using deprecated syntax", async () => {
			const app = await client(app_reference);
			expect(app.config).toEqual(config_response);
		});
		test("connecting to a running app with a space reference", async () => {
			const app = await Client.connect(app_reference);
			expect(app.config).toEqual(config_response);
		});

		test("connecting to a running app with a direct app URL", async () => {
			const app = await Client.connect(direct_app_reference);
			expect(app.config).toEqual(config_response);
		});

		test("connecting successfully to a private running app with a space reference", async () => {
			const app = await Client.connect("hmb/secret_world", {
				hf_token: "hf_123"
			});

			expect(app.config).toEqual({
				...config_response,
				root: "https://hmb-secret-world.hf.space"
			});
		});

		test("connecting successfully to a private running app with a direct app URL ", async () => {
			const app = await Client.connect(secret_direct_app_reference, {
				hf_token: "hf_123"
			});

			expect(app.config).toEqual({
				...config_response,
				root: "https://hmb-secret-world.hf.space"
			});
		});

		test("unsuccessfully attempting to connect to a private running app", async () => {
			await expect(
				Client.connect("hmb/secret_world", {
					hf_token: "hf_bad_token"
				})
			).rejects.toThrowError(SPACE_METADATA_ERROR_MSG);
		});

		test("viewing the api info of a running app", async () => {
			const app = await Client.connect(app_reference);
			expect(await app.view_api()).toEqual(transformed_api_info);
		});

		test("viewing the api info of a non-existent app", async () => {
			const app = Client.connect(broken_app_reference);
			await expect(app).rejects.toThrowError();
		});
	});

	describe("duplicate", () => {
		test("backwards compatibility of duplicate using deprecated syntax", async () => {
			const app = await duplicate("gradio/hello_world", {
				hf_token: "hf_123",
				private: true,
				hardware: "cpu-basic"
			});

			expect(app.config).toEqual(config_response);
		});

		test("creating a duplicate of a running app", async () => {
			const duplicate = await Client.duplicate("gradio/hello_world", {
				hf_token: "hf_123",
				private: true,
				hardware: "cpu-basic"
			});

			expect(duplicate.config).toEqual(config_response);
		});

		test("creating a duplicate of a running app without a token", async () => {
			const duplicate = Client.duplicate("gradio/hello_world", {
				private: true,
				hardware: "cpu-basic"
			});

			await expect(duplicate).rejects.toThrow("Error: Unauthorized");
		});

		test("creating a duplicate of a broken app", async () => {
			const duplicate = Client.duplicate(broken_app_reference);

			await expect(duplicate).rejects.toThrow(SPACE_METADATA_ERROR_MSG);
		});
	});

	describe("overriding the Client class", () => {
		test("overriding methods on the Client class", async () => {
			const mocked_fetch = vi.fn(
				(input: RequestInfo | URL, init?: RequestInit): Promise<Response> => {
					return Promise.resolve(
						new Response(JSON.stringify({ data: "test" }))
					);
				}
			);

			class CustomClient extends Client {
				fetch = mocked_fetch;
			}

			await CustomClient.connect("hmb/hello_world");
			expect(mocked_fetch).toHaveBeenCalled();
		});
	});
});