// E2E for Docker "QQ never logs in + pipe keeps reconnecting" scenario.
//
// Drives the real PipeWatcher + HookManager through repeated same-PID
// pipe up/down cycles via tickNow() and asserts the BridgeManager mock
// is never touched (no login → no Bridge / OneBotInstance / Identity).

import { describe, it, expect, vi } from 'vitest';
import { EventEmitter } from 'events';
import { HookManager } from '../src/hook-manager';
import { PipeWatcher } from '../src/pipe-watcher';
import type { ManualMapHandle } from '../src/injector';
import type { BridgeManagerSink } from '../src/hook-manager';
import type { QqHookClient } from '../src/qq-hook-client';

const DUMMY_HANDLE: ManualMapHandle = { base: 0n, entry: 0n, exceptionTable: 0n, size: 0 };
const flush = () => new Promise<void>((r) => setImmediate(r));

class FakeClient extends EventEmitter {
    isClosed = false;
    isLoggedIn = false;
    async connectAll(_opts: { recv: boolean }) {
        if (this.isClosed) {
            throw new Error('client is closed');
        }
    }
    getLoginState() {
        return { loggedIn: false, uin: '0', uinNumber: 0n };
    }
    close() {
        if (this.isClosed) {
            return;
        }

        this.isClosed = true;
        this.emit('close');
    }
}

describe('HookManager — Docker reconnect-without-login leak guard', () => {
    it('after N pipe up/down cycles: no Bridge calls, no client accumulation', async () => {
        const PID = 61;
        const liveSet = new Set<number>([PID]);
        const clients: FakeClient[] = [];

        const pipeWatcher = new PipeWatcher({
            listProcesses: async () => [{ pid: PID, name: 'qq', path: '' }],
            listLivePipes: async () => new Set(liveSet),
            intervalMs: 60_000, // manual ticks only
        });

        const bridgeManager = {
            onPacket: vi.fn(),
            onHookLogin: vi.fn(),
            onPidDisconnected: vi.fn(),
        } as unknown as BridgeManagerSink;

        const manager = new HookManager({
            bridgeManager,
            pipeWatcher,
            injector: {
                inject: vi.fn(async () => ({
                    method: 'loadModuleManual' as const,
                    handle: DUMMY_HANDLE,
                })),
                unload: vi.fn(async () => {}),
            },
            makeClient: () => {
                const c = new FakeClient();
                clients.push(c);
                return c as unknown as QqHookClient;
            },
            autoLoadOnDiscovery: true,
            listProcesses: async () => [{ pid: PID, name: 'qq', path: '' }],
            detectAccounts: async () => [],
            watchAccounts: () => () => {},
        });

        // Initial discovery + first connect.
        await pipeWatcher.start();
        await flush();
        await flush();

        // Drive 50 pipe up/down cycles with the QQ process staying alive but
        // the pipe (= QQ control socket) bouncing every "tick".
        const CYCLES = 50;

        for (let i = 0; i < CYCLES; i++) {
            liveSet.delete(PID);
            await pipeWatcher.tickNow();
            await flush();
            liveSet.add(PID);
            await pipeWatcher.tickNow();
            await flush();
        }

        // The "QQ never logs in" hypothesis: BridgeManager should never have
        // been told about a login or a disconnect.
        expect(bridgeManager.onHookLogin).not.toHaveBeenCalled();
        expect(bridgeManager.onPidDisconnected).not.toHaveBeenCalled();
        expect(bridgeManager.onPacket).not.toHaveBeenCalled();

        // Hook layer should hold at most one live client.
        const alive = clients.filter((c) => !c.isClosed);
        expect(
            alive.length,
            `live clients after ${CYCLES} cycles: ${alive.length}`,
        ).toBeLessThanOrEqual(1);

        // Total clients minted = roughly one per up cycle. Sanity bound:
        // we must have actually exercised the reconnect path.
        expect(clients.length).toBeGreaterThan(1);

        manager.dispose();
    });
});