import { test } from 'node:test';
import assert from 'node:assert/strict';
import { EventBus } from '../../YouleNexus/assets/framework/core/events.ts';
import { toView, fromView } from '../../YouleNexus/assets/framework/core/seat.ts';
import { PlatformSession } from '../../YouleNexus/assets/framework/platform/session.ts';
import type { NetClientEvents } from '../../YouleNexus/assets/framework/net/net-client.ts';
import type { GameContext, IGameModule } from '../../YouleNexus/assets/framework/sdk/index.ts';

/**
 * 真实子游戏端到端模拟：创建 PlatformSession + 注册 Mock 子游戏 + 注入 GameContext。
 * 验证契约边界（IGameModule 钩子触发、GameContext 只读、send 受限）。
 */

function makeContext(): {
  ctx: GameContext;
  sent: Array<{ route: string; rpc: string; data: any }>;
  bus: EventBus<NetClientEvents>;
  session: PlatformSession;
} {
  const bus = new EventBus<NetClientEvents>();
  const session = new PlatformSession(bus);

  // 受限的 send：只记录,不动 NetClient transport（架构零耦合规则）
  const sent: Array<{ route: string; rpc: string; data: any }> = [];
  const net = {
    send(route: string, rpc: string, data: unknown) { sent.push({ route, rpc, data }); },
  };

  const ctx: GameContext = {
    net,
    room: session.room,
    player: session.player,
    app: session.app,
    seat: { toView, fromView },
    events: new EventBus(),
  };

  return { ctx, sent, bus, session };
}

/** Mock 子游戏：捕获所有钩子调用。 */
class MockGame implements IGameModule {
  readonly route = 'mock-game';
  events: string[] = [];

  onEnter(_ctx: GameContext): void { this.events.push('onEnter'); }
  onExit(): void { this.events.push('onExit'); }
  onReceive(rpc: string, _data: unknown): void { this.events.push(`onReceive:${rpc}`); }
  onReconnect(deskinfo: unknown): void { this.events.push('onReconnect'); void deskinfo; }
  serialize(): unknown { return { mock: 'snapshot' }; }

  // 默认空钩子测试
  onPlayerJoin(seat: number): void { this.events.push(`onPlayerJoin:${seat}`); }
  onPlayerLeave(seat: number): void { this.events.push(`onPlayerLeave:${seat}`); }
  onReady(seat: number): void { this.events.push(`onReady:${seat}`); }
  onDissolve(): void { this.events.push('onDissolve'); }
  onOffline(seat: number): void { this.events.push(`onOffline:${seat}`); }
}

test('IGameModule 契约: 注册后 onEnter 触发', () => {
  const { ctx } = makeContext();
  const game = new MockGame();
  game.onEnter(ctx);
  assert.deepEqual(game.events, ['onEnter']);
});

test('IGameModule 契约: onReceive 接收 rpc + data', () => {
  const { ctx } = makeContext();
  const game = new MockGame();
  game.onEnter(ctx);
  game.onReceive('game_action', { x: 1 });
  assert.deepEqual(game.events, ['onEnter', 'onReceive:game_action']);
});

test('IGameModule 契约: 平台钩子默认空实现不抛错(可选)', () => {
  // 一个只实现必需钩子的子游戏
  const minimal: IGameModule = {
    route: 'minimal',
    onEnter() { /* noop */ },
    onExit() { /* noop */ },
    onReceive(_rpc, _data) { /* noop */ },
    onReconnect(_d) { /* noop */ },
    // 钩子全部可选
  };
  // 编译通过 + 不抛错即通过
  minimal.onPlayerJoin?.(1);
  minimal.onPlayerLeave?.(2);
  minimal.onReady?.(3);
  minimal.onDissolve?.();
  minimal.onOffline?.(4);
});

test('GameContext: 只暴露 ReadonlyPlayerStore 接口,不暴露 applyLogin', () => {
  const { ctx } = makeContext();
  // type 层面:ctx.player 是 ReadonlyPlayerStore 接口,没有 applyLogin
  // 这里用类型断言模拟「如果按 ReadonlyPlayerStore 类型使用,applyLogin 应不存在」
  type ReadonlyView = { readonly state: { readonly value: { playerid: number } } };
  const view = ctx.player as unknown as ReadonlyView;
  assert.equal(view.state.value.playerid, 0);
  // 通过 keyof 验证:ReadonlyPlayerStore 接口暴露的方法只有 state getter
  type ExposedKeys = keyof typeof ctx.player;
  assert.ok('state' in ctx.player, 'state 是公开字段');
});

test('GameContext.net.send: 受限接口,不暴露 transport / ws_tcp / start', () => {
  const { ctx, sent } = makeContext();
  ctx.net.send('agent', 'join_table', { roomcode: 'R1' });
  assert.deepEqual(sent, [{ route: 'agent', rpc: 'join_table', data: { roomcode: 'R1' } }]);
  // 不应有 transport / ws_tcp / start
  assert.equal((ctx.net as any).transport, undefined);
  assert.equal((ctx.net as any).start, undefined);
});

test('GameContext.seat.toView: 替代旧 ChangeToStatus', () => {
  const { ctx } = makeContext();
  // 旧 ChangeToStatus 语义(已存在 core/seat.ts): 自己=0,其余环形顺延
  assert.equal(ctx.seat.toView(0, 0, 4), 0); // 自己=自己
  assert.equal(ctx.seat.toView(0, 1, 4), 1); // 右手位
  assert.equal(ctx.seat.toView(0, 3, 4), 3); // 左手位
  // 跨玩家视角:玩家 2 看玩家 0,2 应当是 2(view seat),0 应当是 -2 mod 4 = 2(实际为反向)
  assert.equal(ctx.seat.fromView(2, 0, 4), 2); // 验证 fromView 反运算
});

test('IGameModule.route 必须等于自己的 game route（框架 Router 据此分发）', () => {
  const game = new MockGame();
  assert.equal(game.route, 'mock-game');
});

test('serialize 返回对局快照(断线重连用)', () => {
  const game = new MockGame();
  assert.deepEqual(game.serialize(), { mock: 'snapshot' });
});