import { ref, computed, watch } from 'vue';
import { useLotteryStore } from '../../../store/lottery' // 路径根据实际情况调整
import { drawLottery } from '../../../api/API'; // 导入新的抽奖接口

function getRandomInt(max) {
  return Math.floor(Math.random() * max);
}

const lotteryStore = useLotteryStore();
const winners = computed({
  get: () => lotteryStore.winners,
  set: (val) => lotteryStore.setWinners(val),
});


// 用watch监听winners的变化
// watch(winners, (newVal) => {
//   console.log('winners', newVal);
//   winners.value = newVal;
// });

export function useLotteryEngine(dataManager, renderer3D) {
  const isLotting = ref(false);
  const lotteryStore = useLotteryStore(); // 只获取一次

  async function executeLottery() {
    if (isLotting.value) return;
    isLotting.value = true;
    dataManager.setLotteryStatus(true);
    await dataManager.saveData();
    changePrize();
    // 重置卡片动画
    await renderer3D.resetCard([]);
    
    // 计算本次应该抽奖的人数
    const currentPrizeIndex = dataManager.state.currentPrizeIndex;
    const prize = dataManager.state.basicData.prizes[currentPrizeIndex];
    const luckyUsers = dataManager.state.basicData.luckyUsers[currentPrizeIndex] || [];
    const remainingPrizeCount = prize.count - luckyUsers.length; // 奖品剩余数量
    const basePerCount = dataManager.state.config.EACH_COUNT[currentPrizeIndex] || 1;
    const actualPerCount = Math.min(basePerCount, remainingPrizeCount); // 取最小值
    
    console.log('executeLottery - currentPrizeIndex:', currentPrizeIndex, 'prize:', prize, 'basePerCount:', basePerCount, 'remainingPrizeCount:', remainingPrizeCount, 'actualPerCount:', actualPerCount);
    
    // 请求后端进行抽奖
    try {
      const lotteryData = {
        gradeId: prize.gradeId,
        prizeId: prize.prizeId,
        perWin: basePerCount,
        remainNum: prize.remainNum
      };
      
      console.log('请求后端抽奖，参数:', lotteryData);
      const response = await drawLottery(lotteryData);
      console.log('response', response);
      winners.value = response.data.data;
      console.log('抽奖的winners', winners.value);
      // winners.value = response.data;  

      console.log('后端抽奖返回结果:', response);
      
      if (response && response.data.data && Array.isArray(response.data.data)) {
        // 后端返回中奖用户数据
        const currentLuckys = response.data.data.map(item => ({
          jwcode: item.jwcode,
          username: item.username
        }));
        
        console.log('后端返回的中奖用户:', currentLuckys);
        
        // 生成随机卡片索引用于显示
        const totalCards = dataManager.getTotalCards();
        let selectedCardIndex = [];
        for (let i = 0; i < currentLuckys.length; i++) {
          let cardIndex = getRandomInt(totalCards);
          while (selectedCardIndex.includes(cardIndex)) {
            cardIndex = getRandomInt(totalCards);
          }
          selectedCardIndex.push(cardIndex);
        }
        
        console.log('executeLottery - selectedCardIndex:', selectedCardIndex, 'currentLuckys:', currentLuckys);
        
        dataManager.state.currentLuckys = currentLuckys;
        // 保存中奖用户到对应奖品
        if (!dataManager.state.basicData.luckyUsers[currentPrizeIndex]) {
          dataManager.state.basicData.luckyUsers[currentPrizeIndex] = [];
        }
        dataManager.state.basicData.luckyUsers[currentPrizeIndex].push(...currentLuckys);
        // 更新轮次信息
        dataManager.updateCurrentRound();
        // 展示中奖动画
        console.log('executeLottery - calling selectCard');
        await renderer3D.selectCard?.(selectedCardIndex, currentLuckys);
        console.log('executeLottery - selectCard completed');
      } else {
        console.error('后端抽奖返回数据格式错误:', response);
        throw new Error('抽奖失败：后端返回数据格式错误');
      }
    } catch (error) {
      console.error('抽奖请求失败:', error);
             // 如果后端请求失败，可以回退到前端随机抽奖逻辑
       console.log('回退到前端随机抽奖逻辑');
       
       const totalCards = dataManager.getTotalCards();
       const leftUsers = dataManager.state.basicData.leftUsers;
       let selectedCardIndex = [];
       let currentLuckys = [];
       let leftCount = leftUsers.length;
       
       // 随机抽取中奖用户和卡片索引
       for (let i = 0; i < actualPerCount && leftCount > 0; i++) {
         const luckyId = getRandomInt(leftCount);
         const selectedUser = leftUsers.splice(luckyId, 1)[0];
         // 确保数据格式一致
         currentLuckys.push({
           jwcode: selectedUser.jwcode || selectedUser[0] || "",
           username: selectedUser.username || selectedUser[1] || "",
           company: selectedUser.company || selectedUser[2] || "PSST"
         });
         leftCount--;
         let cardIndex = getRandomInt(totalCards);
         while (selectedCardIndex.includes(cardIndex)) {
           cardIndex = getRandomInt(totalCards);
         }
         selectedCardIndex.push(cardIndex);
       }
      
      console.log('executeLottery - selectedCardIndex:', selectedCardIndex, 'currentLuckys:', currentLuckys);
      
      dataManager.state.currentLuckys = currentLuckys;
      // 保存中奖用户到对应奖品
      if (!dataManager.state.basicData.luckyUsers[currentPrizeIndex]) {
        dataManager.state.basicData.luckyUsers[currentPrizeIndex] = [];
      }
      dataManager.state.basicData.luckyUsers[currentPrizeIndex].push(...currentLuckys);
      // 更新轮次信息
      dataManager.updateCurrentRound();
      // 展示中奖动画
      console.log('executeLottery - calling selectCard');
      await renderer3D.selectCard?.(selectedCardIndex, currentLuckys);
      console.log('executeLottery - selectCard completed');
    }
    
    // 抽奖完成后更新奖品列表数据
    try {
      await dataManager.updatePrizeList();
      console.log('抽奖完成后奖品列表已更新');
    } catch (error) {
      console.error('更新奖品列表失败:', error);
    }
    
    dataManager.setLotteryStatus(false);
    isLotting.value = false;
  }

  function performLottery() {
    // 已合并到 executeLottery
  }

  function changePrize() {
    // 可根据中奖情况切换奖品
    dataManager.updateCurrentPrize();
  }

  async function resetLottery() {
    if (isLotting.value) return;
    dataManager.resetAllData();
    renderer3D.addHighlight && renderer3D.addHighlight();
    lotteryStore.setLotteryState('idle'); // 直接用
    await renderer3D.resetCard([]);
    await dataManager.resetData();
    // 重置轮次
    dataManager.state.currentRound = 1;
    renderer3D.switchScreen && renderer3D.switchScreen('enter');
  }

  return {
    isLotting,
    executeLottery,
    performLottery,
    changePrize,
    resetLottery
  };
}