import { afterEach, beforeEach, expect, test } from 'bun:test';
import { existsSync } from 'node:fs';
import { mkdtemp, rm } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import type { Server } from 'bun';
import { layout, portsForSlot, readJson, saveConfig } from './config';
import { callWorker } from './control';
import { FakeDesktop } from './fakes';
import { runWorker, type WorkerState } from './worker';

const CHANNEL = '0b7f3c2a-1d2e-4f5a-8b9c-0d1e2f3a4b5c';
let home: string;
let vash: Server<undefined>;
const received: Record<string, unknown>[] = [];
const posts: Record<string, unknown>[] = [];
let live = false;

beforeEach(async () => {
	home = await mkdtemp(join(tmpdir(), 'vash-worker-'));
	process.env.VASH_BROADCAST_HOME = home;
	received.length = 0;
	posts.length = 0;
	live = false;
	vash = Bun.serve({
		port: 0,
		async fetch(request, server) {
			const url = new URL(request.url);
			if (url.pathname === '/ws/agent')
				return server.upgrade(request) ? undefined : new Response('no');
			if (request.headers.get('authorization') !== 'Bearer vash_test')
				return new Response('no', { status: 401 });
			if (url.pathname === `/api/broadcast/${CHANNEL}/stream` && request.method === 'GET')
				return Response.json({
					live,
					name: 'Main',
					width: 1920,
					height: 1080,
					fps: 60,
					bitrateKbps: 6000,
					overlayUrl: `${url.origin}/broadcast/${CHANNEL}/overlay`,
					record: false,
					destinations: []
				});
			if (url.pathname === `/api/broadcast/${CHANNEL}/stream`) {
				const body = (await request.json()) as Record<string, unknown>;
				posts.push(body);
				return Response.json(
					body.event === 'start' ? { id: 'session-1', storagePrefix: null } : { ok: true }
				);
			}
			return new Response('not found', { status: 404 });
		},
		websocket: {
			message(ws, raw) {
				const message = JSON.parse(String(raw));
				received.push(message);
				if (message.type === 'hello') {
					ws.send(JSON.stringify({ type: 'welcome', channel: 'Main' }));
					ws.send(
						JSON.stringify({
							type: 'follow',
							scene: 'idle',
							matchId: null,
							lobbyId: null,
							roomName: null,
							teamSize: null,
							title: null
						})
					);
				}
			}
		}
	});
	await saveConfig({
		version: 1,
		name: 'test',
		server: `http://127.0.0.1:${vash.port}`,
		channel: CHANNEL,
		token: 'vash_test',
		access: null,
		ports: portsForSlot(40 + Math.floor(Math.random() * 9)),
		obsPassword: 'pw',
		ingestKey: 'key',
		osuSource: null,
		tourneyHeight: 720,
		encoder: 'amd',
		autostart: false
	});
});

afterEach(async () => {
	vash.stop(true);
	delete process.env.VASH_BROADCAST_HOME;
	await rm(home, { recursive: true, force: true });
});

test('runs without its programs, reports why, follows Go live, and stops cleanly', async () => {
	const paths = layout('test');
	const desktop = new FakeDesktop();
	const done = runWorker('test', desktop);
	let status: WorkerState | null = null;
	for (let waited = 0; waited < 80 && !status?.vash.connected; waited++) {
		await Bun.sleep(100);
		status = await callWorker<WorkerState>(paths.runtime, '/status');
	}
	expect(status?.vash).toMatchObject({ connected: true, channel: 'Main' });
	// OBS is not installed here, so the worker says it is (re)starting it rather than claiming success.
	expect(['starting', 'reconnecting']).toContain(status!.state);
	expect(status!.tourney.state).not.toBe('spectating');
	expect(received.some((message) => message.type === 'status' && message.instance === 'test')).toBe(
		true
	);
	expect(existsSync(paths.lock)).toBe(true);

	live = true;
	for (let waited = 0; waited < 80 && !posts.length; waited++) await Bun.sleep(100);
	expect(posts[0]).toEqual({ event: 'start' });

	expect(await callWorker<{ ok: boolean }>(paths.runtime, '/stop', { method: 'POST' })).toEqual({
		ok: true
	});
	expect(await done).toBe(0);
	expect(posts.at(-1)).toMatchObject({ event: 'end', sessionId: 'session-1' });
	expect(existsSync(paths.runtime)).toBe(false);
	expect(existsSync(paths.lock)).toBe(false);
	expect((await readJson<WorkerState>(paths.state))?.state).toBe('stopped');
	expect(
		received.some((message) => message.type === 'status' && message.state === 'stopping')
	).toBe(true);
}, 30_000);