import { once } from 'node:events';
import http from 'node:http';
import net from 'node:net';
import type { AddressInfo } from 'node:net';
import { describe, expect, it } from 'vitest';
import type { NetworkAdapterContext } from '../src/network/adapter';
import { HttpServerAdapter } from '../src/network/http-server-adapter';
import type { HttpServerNetwork } from '../src/types';

describe('HttpServerAdapter forced release', () => {
    it('drops a held connection so the port can be bound again', async () => {
        const ctx = {
            uin: '10001',
            api: {
                handle: async () => ({ status: 'ok', retcode: 0, data: null }),
                isStreamAction: () => false,
            },
            buildLifecycleEvent: () => ({}),
            buildHeartbeatEvent: () => ({}),
        } as unknown as NetworkAdapterContext;
        const config: HttpServerNetwork = {
            name: 'http-force-close',
            host: '127.0.0.1',
            port: 0,
            path: '/',
            messageFormat: 'array',
            reportSelfMessage: false,
        };
        const adapter = new HttpServerAdapter(config.name, config, ctx);
        let socket: net.Socket | null = null;

        try {
            await adapter.open();
            const server = (adapter as unknown as { server: http.Server | null }).server;
            expect(server).not.toBeNull();
            const port = (server!.address() as AddressInfo).port;
            socket = net.connect({ host: '127.0.0.1', port });
            await once(socket, 'connect');

            adapter.forceClose();

            expect(server!.listening).toBe(false);
            await expect(listenOn(port)).resolves.toBeUndefined();
        } finally {
            socket?.destroy();
            await adapter.close();
        }
    });
});

function listenOn(port: number): Promise<void> {
    const server = net.createServer();
    return new Promise((resolve, reject) => {
        server.once('error', reject);
        server.listen(port, '127.0.0.1', () => {
            server.close(() => resolve());
        });
    });
}