import { useComputed, signal } from '@preact/signals';
import { createGameHost, type GameModule } from 'boardgame-core';
import Phaser from 'phaser';
import { h } from 'preact';
import { PhaserGame, PhaserScene } from 'boardgame-phaser';

// 全局信号：从 GameScene 传递反击阶段的状态到 UI
export const counterattackInfo = signal<{
  phase: string;
  selectedCards: string[];
  totalValue: number;
  maxHandValue: number;    // 手牌最大可提供的点数
  requiredValue: number;
  canSubmit: boolean;
  canWin: boolean;         // 手牌是否足以获胜
  error: string | null;
}>({
  phase: '',
  selectedCards: [],
  totalValue: 0,
  maxHandValue: 0,
  requiredValue: 0,
  canSubmit: false,
  canWin: false,
  error: null,
});

// 全局信号：牌堆信息
export const deckInfo = signal<{
  castleDeck: number;    // 敌人牌堆剩余
  tavernDeck: number;    // 酒馆牌堆剩余
  discardPile: number;   // 弃牌堆数量
  hand: number;          // 手牌数
  defeatedEnemies: number; // 已击败敌人数
  jestersUsed: number;   // 已用小丑牌数
}>({
  castleDeck: 0,
  tavernDeck: 0,
  discardPile: 0,
  hand: 0,
  defeatedEnemies: 0,
  jestersUsed: 0,
});

// 存储当前场景引用（由 GameScene 在 create 时设置）
let currentGameScene: any = null;
export function setGameSceneRef(scene: any) {
  currentGameScene = scene;
}

export default function App<TState extends Record<string, unknown>>(props: { gameModule: GameModule<TState>, gameScene: { new(): Phaser.Scene } }) {

  const gameHost = useComputed(() => {
    const gameHost = createGameHost(props.gameModule);
    return { gameHost };
  });

  const scene = useComputed(() => new props.gameScene());

  const handleReset = async () => {
    const result = await gameHost.value.gameHost.start();
    console.log('Game finished!', result);
  };

  const label = useComputed(() =>
    gameHost.value.gameHost.status.value === 'running' ? '重新开始' : '开始游戏'
  );

  // 反击阶段提交
  const handleSubmitCounterattack = () => {
    if (currentGameScene && typeof currentGameScene.submitCounterattack === 'function') {
      currentGameScene.submitCounterattack();
    }
  };

  // 反击阶段认输
  const handleSurrender = () => {
    if (currentGameScene && typeof currentGameScene.surrenderCounterattack === 'function') {
      currentGameScene.surrenderCounterattack();
    }
  };

  // Phaser 画布配置
  const phaserConfig = {
    type: Phaser.AUTO,
    width: 800,
    height: 700,
    backgroundColor: '#111827',
  };

  return (
    <div class="flex flex-col h-screen bg-gray-900">
      {/* Phaser 游戏场景 */}
      <div class="flex-1 relative flex items-center justify-center">
        <PhaserGame config={phaserConfig}>
          <PhaserScene sceneKey="RegicideGameScene" scene={scene.value} autoStart data={gameHost.value} />
        </PhaserGame>
      </div>

      {/* 底部控制栏 */}
      <div class="p-4 bg-gray-900 border-t border-gray-700 flex flex-col gap-3">
        {/* 牌堆信息 */}
        <div class="flex items-center justify-center gap-6 text-sm">
          <div class="flex items-center gap-1.5">
            <span class="text-lg">🏰</span>
            <span class="text-gray-400">城堡牌堆:</span>
            <span class="text-purple-400 font-bold">{deckInfo.value.castleDeck}</span>
          </div>
          <div class="flex items-center gap-1.5">
            <span class="text-lg">🍺</span>
            <span class="text-gray-400">酒馆牌堆:</span>
            <span class="text-amber-400 font-bold">{deckInfo.value.tavernDeck}</span>
          </div>
          <div class="flex items-center gap-1.5">
            <span class="text-lg">🗑️</span>
            <span class="text-gray-400">弃牌堆:</span>
            <span class="text-gray-300 font-bold">{deckInfo.value.discardPile}</span>
          </div>
          <div class="flex items-center gap-1.5">
            <span class="text-lg">🃏</span>
            <span class="text-gray-400">手牌:</span>
            <span class="text-blue-400 font-bold">{deckInfo.value.hand}</span>
          </div>
          <div class="flex items-center gap-1.5">
            <span class="text-lg">💀</span>
            <span class="text-gray-400">已击败:</span>
            <span class="text-red-400 font-bold">{deckInfo.value.defeatedEnemies}/12</span>
          </div>
          <div class="flex items-center gap-1.5">
            <span class="text-lg">🃏</span>
            <span class="text-gray-400">小丑牌:</span>
            <span class="text-green-400 font-bold">{2 - deckInfo.value.jestersUsed}/2</span>
          </div>
        </div>

        {/* 反击阶段信息 + 按钮 */}
        <div class="flex justify-between items-center">
          <div class="text-sm text-gray-400">
            ⚔️ Regicide - 击败所有12个敌人
          </div>

          {/* 反击阶段信息面板 */}
          {counterattackInfo.value.phase === 'enemyCounterattack' && (
            <div class="flex items-center gap-4">
              <div class="text-sm text-gray-300">
                <span class="text-yellow-400 font-bold">💥 反击阶段</span>
                <span class="ml-2">需要: </span>
                <span class="text-red-400 font-bold">{counterattackInfo.value.requiredValue}</span>
                <span class="ml-2">| 手牌最多: </span>
                <span class={counterattackInfo.value.canWin ? 'text-green-400 font-bold' : 'text-red-400 font-bold'}>
                  {counterattackInfo.value.maxHandValue}
                </span>
              </div>
              {counterattackInfo.value.selectedCards.length > 0 && (
                <div class="text-sm text-gray-300">
                  <span>已选: </span>
                  <span class="text-blue-400 font-bold">{counterattackInfo.value.selectedCards.length}张</span>
                  <span class="ml-2">点数: </span>
                  <span class={counterattackInfo.value.canSubmit ? 'text-green-400 font-bold' : 'text-orange-400 font-bold'}>
                    {counterattackInfo.value.totalValue}
                  </span>
                </div>
              )}
              {counterattackInfo.value.error && (
                <div class="text-sm text-red-400">
                  ❌ {counterattackInfo.value.error}
                </div>
              )}
            </div>
          )}

          <div class="flex gap-2">
            {/* 反击确认按钮 */}
            {counterattackInfo.value.phase === 'enemyCounterattack' && counterattackInfo.value.selectedCards.length > 0 && (
              <button
                onClick={handleSubmitCounterattack}
                disabled={!counterattackInfo.value.canSubmit}
                class={`px-4 py-2 rounded font-medium transition-colors ${
                  counterattackInfo.value.canSubmit
                    ? 'bg-green-600 text-white hover:bg-green-700'
                    : 'bg-gray-600 text-gray-400 cursor-not-allowed'
                }`}
              >
                ✓ 确认出牌
              </button>
            )}

            {/* 认输按钮 */}
            {counterattackInfo.value.phase === 'enemyCounterattack' && !counterattackInfo.value.canWin && (
              <button
                onClick={handleSurrender}
                class="px-4 py-2 bg-red-600 text-white rounded hover:bg-red-700 transition-colors font-medium"
              >
                🏳️ 认输
              </button>
            )}

            <button
              onClick={handleReset}
              class="px-6 py-2 bg-yellow-600 text-white rounded hover:bg-yellow-700 disabled:bg-gray-600 disabled:cursor-not-allowed transition-colors font-medium"
            >
              {label}
            </button>
          </div>
        </div>
      </div>
    </div>
  );
}