import { test } from 'node:test';
import assert from 'node:assert/strict';
import { NetClient } from '../../YouleNexus/assets/framework/net/net-client.ts';
import { FakeTransport } from '../helpers/fake-transport.ts';
import type { Clock } from '../../YouleNexus/assets/framework/net/heartbeat.ts';

function fakeClock() {
  let seq = 0, now = 0;
  const timers = new Map<number, { fn: () => void; at: number }>();
  const clock: Clock = {
    setTimeout: (fn, ms) => { const id = ++seq; timers.set(id, { fn, at: now + ms }); return id; },
    clearTimeout: (id: any) => { timers.delete(id); },
  };
  const advance = (ms: number) => { now += ms; for (const [id, t] of [...timers]) if (t.at <= now) { timers.delete(id); t.fn(); } };
  return { clock, advance };
}

const IDENTITY = { agentid: 1, gameid: 2, openid: 'o', nickname: 'n', avatar: 'a', sex: 0, province: '', city: '', unionid: 'u', version: '1', channelid: 0, marketid: 0 };

function makeClient(transports: FakeTransport[], clock: Clock) {
  let i = 0;
  const client = new NetClient({
    servers: 'ws://a',
    transportFactory: () => transports[i++] ?? transports[transports.length - 1],
    clock,
  });
  client.setIdentity(IDENTITY);
  return client;
}

test('onOpen 后自动发 player_login（单层信封）', async () => {
  const t = new FakeTransport();
  const { clock } = fakeClock();
  const client = makeClient([t], clock);
  client.start();
  await t.flush();
  assert.equal(t.sent.length, 1);
  const env = JSON.parse(t.sent[0]);
  assert.equal(env.app, 'youle');
  assert.equal(env.route, 'agent');
  assert.equal(env.rpc, 'player_login');
  assert.equal(env.data.openid, 'o');
});

test('isSendLoginState 门控：login 响应前的其它包被丢弃，login 响应放行并 emit login', async () => {
  const t = new FakeTransport();
  const { clock } = fakeClock();
  const client = makeClient([t], clock);
  const messages: any[] = [];
  let loginResp: any = null;
  client.on('message', (m: any) => messages.push(m));
  client.on('login', (d: any) => { loginResp = d; });
  client.start();
  await t.flush();
  // 登录响应前推一个业务包 → 应被门控丢弃
  t.serverPush(JSON.stringify({ data: JSON.stringify({ route: 'agent', rpc: 'update_bean', data: { bean: 5 } }) }));
  await t.flush();
  assert.equal(messages.length, 0);
  // 推 login 响应 → 放行，emit login，清门控
  t.serverPush(JSON.stringify({ data: JSON.stringify({ route: 'agent', rpc: 'player_login', data: { state: 0, playerid: 9 } }) }));
  await t.flush();
  assert.equal(loginResp.playerid, 9);
  // 门控已清，后续业务包放行
  t.serverPush(JSON.stringify({ data: JSON.stringify({ route: 'agent', rpc: 'update_bean', data: { bean: 5 } }) }));
  await t.flush();
  assert.equal(messages.length, 1);
  assert.equal(messages[0].rpc, 'update_bean');
});

test('握手包与心跳包被忽略且不进 message', async () => {
  const t = new FakeTransport();
  const { clock } = fakeClock();
  const client = makeClient([t], clock);
  const messages: any[] = [];
  client.on('message', (m: any) => messages.push(m));
  client.start();
  await t.flush();
  // 先完成登录以清门控
  t.serverPush(JSON.stringify({ data: JSON.stringify({ route: 'agent', rpc: 'player_login', data: { state: 0, playerid: 9 } }) }));
  await t.flush();
  t.serverPush(JSON.stringify({ data: '@toconconABC' }));                          // 握手
  t.serverPush(JSON.stringify({ data: JSON.stringify({ com: '@serverheartbeat' }) })); // 心跳
  await t.flush();
  assert.equal(messages.length, 0);
});

test('收包超时 emit slow 并触发重连（onClose→新连接重发 login）', async () => {
  const t1 = new FakeTransport(), t2 = new FakeTransport();
  const { clock, advance } = fakeClock();
  const client = makeClient([t1, t2], clock);
  let slow = 0;
  client.on('slow', () => { slow++; });
  client.start();
  await t1.flush();
  // 先完成登录：清 4s 守护、feed 收包看门狗（否则 advance 会先撞上 loginGuard 而非 watchdog）
  t1.serverPush(JSON.stringify({ data: JSON.stringify({ route: 'agent', rpc: 'player_login', data: { state: 0, playerid: 9 } }) }));
  await t1.flush();
  // 30s 无收包 → watchdog → slow + 关闭当前连接
  advance(30000);
  await t1.flush();
  assert.equal(slow, 1);
  // 重连定时器到点 → 新连接 t2 建立并重发 login
  advance(10000);
  await t2.flush();
  assert.equal(t2.sent.length, 1);
  assert.equal(JSON.parse(t2.sent[0]).rpc, 'player_login');
});

test('TcpID 去重：旧连接的残留包被丢弃', async () => {
  const t1 = new FakeTransport(), t2 = new FakeTransport();
  const { clock, advance } = fakeClock();
  const client = makeClient([t1, t2], clock);
  const messages: any[] = [];
  client.on('message', (m: any) => messages.push(m));
  client.start();
  await t1.flush();
  t1.serverPush(JSON.stringify({ data: JSON.stringify({ route: 'agent', rpc: 'player_login', data: { state: 0, playerid: 9 } }) }));
  await t1.flush();
  // 触发重连切到 t2
  advance(30000); await t1.flush(); advance(10000); await t2.flush();
  // 旧连接 t1 仍推包 → 应被 TcpID 去重丢弃
  t1.serverPush(JSON.stringify({ data: JSON.stringify({ route: 'agent', rpc: 'update_bean', data: { bean: 1 } }) }));
  await t1.flush();
  assert.equal(messages.length, 0);
});