midi-php/application/api/model/BlindBoxTurntableGiftDraw.php

<?php

namespace app\api\model;
use app\common\controller\Push;
use think\Cache;
use think\Log;
use think\Model;
use think\Db;
use think\Session;
/*
 * 盲盒转盘优化后方法
 *
 */
class BlindBoxTurntableGiftDraw extends Model
{
    /**
     * 重构后的抽奖方法 - 优化响应速度
     */
    public function draw_gift($gift_bag_id, $user_id, $gift_user_ids, $num = 1, $room_id = 0, $heart_id = 0)
    {
        // 1. 验证参数并提前处理错误
        $validationResult = $this->validateDrawParameters($gift_bag_id, $user_id, $gift_user_ids, $room_id);
        if ($validationResult !== true) {
            return $validationResult;
        }

        // 2. 预加载必要数据
        $loadResult = $this->loadDrawData($gift_bag_id, $user_id, $room_id);
        if ($loadResult['code'] !== 1) {
            return $loadResult;
        }
        ['bag_data' => $bag_data, 'room' => $room, 'xlh_ext' => $xlh_ext] = $loadResult['data'];

        // 3. 预计算抽奖结果
        $precomputeResult = $this->precomputeDrawResults(
            $bag_data,
            $room,
            $gift_user_ids,
            $num,
            $room_id
        );
        if ($precomputeResult['code'] !== 1) {
            return $precomputeResult;
        }
        $precomputedResults = $precomputeResult['data']['results'];
        $availableGiftss = $precomputeResult['data']['availableGifts'];
        $currentXlhPeriodsNum = $precomputeResult['data']['current_xlh_periods_num'];
        $xlhIsPiaoPing = $precomputeResult['data']['xlh_is_piao_ping'];

        // 4. 执行抽奖事务（核心操作）
        $transactionResult = $this->executeDrawTransaction(
            $bag_data,
            $user_id,
            $room_id,
            $num,
            $precomputedResults,
            $availableGiftss
        );
        if ($transactionResult['code'] !== 1) {
            return $transactionResult;
        }
        $boxTurntableLog = $transactionResult['data']['log_id'];
        $giftCounts = $transactionResult['data']['gift_counts'];

        // 5. 处理后续操作（非事务性操作）
        $this->handlePostDrawOperations(
            $precomputedResults,
            $boxTurntableLog,
            $room_id,
            $xlh_ext,
            $xlhIsPiaoPing,
            $currentXlhPeriodsNum,
            $room,
            $user_id
        );

        // 6. 构建并返回结果
        return $this->buildDrawResult($boxTurntableLog, $giftCounts);
    }
    /**
     * 验证抽奖参数
     */
    private function validateDrawParameters($gift_bag_id, $user_id, $gift_user_ids, $room_id)
    {
        // 提前验证收礼人
        $toarray = explode(',', $gift_user_ids);
        if (in_array($user_id, $toarray)) {
            return ['code' => 0, 'msg' => "收礼人不能包含自己", 'data' => null];
        }

        // 验证房间ID
        if (empty($room_id)) {
            return ['code' => 0, 'msg' => '房间ID不能为空', 'data' => null];
        }

        // 验证用户ID
        if (empty($user_id)) {
            return ['code' => 0, 'msg' => '用户ID不能为空', 'data' => null];
        }

        // 验证盲盒ID
        if (empty($gift_bag_id)) {
            return ['code' => 0, 'msg' => '盲盒ID不能为空', 'data' => null];
        }

        return true;
    }
    /**
     * 预加载必要数据
     */
    private function loadDrawData($gift_bag_id, $user_id, $room_id)
    {
        // 1. 合并查询盲盒配置和礼物信息
        $bag_data = db::name("vs_gift_bag")
            ->alias('bag')
            ->join('vs_gift gift', 'gift.gid = JSON_UNQUOTE(JSON_EXTRACT(bag.ext, "$.gift_id"))', 'LEFT')
            ->field('bag.id,bag.name,bag.ext,gift.gid as gift_id,gift.gift_price')
            ->where('bag.id', $gift_bag_id)
            ->find();

        if (!$bag_data || !$bag_data['gift_price']) {
            return ['code' => 0, 'msg' => '盲盒配置不存在或盲盒礼物不存在', 'data' => null];
        }

        // 2. 获取房间信息
        $room = db::name('vs_room')
            ->field('id,room_name,xlh_periods,xlh_periods_num,is_open_blind_box_turntable')
            ->where(['id' => $room_id])
            ->find();

        if (!$room) {
            return ['code' => 0, 'msg' => '房间不存在', 'data' => null];
        }

        if ($room['is_open_blind_box_turntable'] != 1) {
            return ['code' => 0, 'msg' => '该房间未开启盲盒转盘', 'data' => null];
        }

        // 3. 检查用户金币
        $user_waller = db::name('user_wallet')
            ->where(['user_id' => $user_id])
            ->find();

        if (!$user_waller) {
            return ['code' => 0, 'msg' => '用户钱包不存在', 'data' => null];
        }

        // 4. 获取巡乐会配置（使用缓存）
        $xlh_ext = $this->getCachedXlhConfig();

        return [
            'code' => 1,
            'msg' => '数据加载成功',
            'data' => [
                'bag_data' => $bag_data,
                'room' => $room,
                'xlh_ext' => $xlh_ext,
                'user_waller' => $user_waller
            ]
        ];
    }
    /**
     * 预计算抽奖结果
     */
    private function precomputeDrawResults($bag_data, $room, $gift_user_ids, $num, $room_id)
    {
        $toarray = explode(',', $gift_user_ids);
        $ext = json_decode($bag_data['ext'], true);
        $xlh_ext = $this->getCachedXlhConfig();
        $xlh_is_piao_ping = 0;
        $current_xlh_periods_num = $room['xlh_periods_num'];

        // 1. 计算奖池信息
        $poolInfo = $this->calculatePoolInfo($bag_data['id'], $room_id);
        if ($poolInfo['code'] !== 1) {
            return $poolInfo;
        }
        $totalQuantity = $poolInfo['data']['total_quantity'];
        $totalRemaining = $poolInfo['data']['total_remaining'];
        $periods = $poolInfo['data']['periods'];
        $totalDrawTimes = $poolInfo['data']['total_draw_times'];

        // 2. 获取可用礼物
        $availableGifts = $this->getAvailableGifts($bag_data['id'], $room_id, $totalDrawTimes);
        if (empty($availableGifts)) {
            return ['code' => 0, 'msg' => '当前盲盒无可用礼物', 'data' => null];
        }

        // 3. 预加载礼物信息（减少后续查询）
        $giftInfoMap = $this->preloadGiftInfo($availableGifts);

        // 4. 处理奖池重置逻辑
        $needGiftNum = count($toarray) * $num;
        $remaining_available_gifts=[];
        if ($totalRemaining - $needGiftNum <= 0) {
            $remaining_available_gifts = $availableGifts;
            $availableGifts = $this->resetPoolAndReload($bag_data['id'], $room_id, $periods + 1, 0);
            if (empty($availableGifts)) {
                return ['code' => 0, 'msg' => '重置奖池后仍无可用礼物', 'data' => null];
            }
            $totalDrawTimes = 0;
            $num = abs($totalRemaining - $num);
        }

        // 5. 使用Alias Method预计算抽奖结果（O(1)复杂度）
        $precomputedResults = $this->precomputeResultsWithAliasMethod(
            $toarray,
            $num,
            $availableGifts,
            $giftInfoMap,
            $totalDrawTimes,
            $periods,
            $current_xlh_periods_num,
            $xlh_ext,
            $bag_data['id'],
            $room_id,
            $remaining_available_gifts
        );
        if (empty($precomputedResults['precomputedResults'])) {
            return ['code' => 0, 'msg' => '预计算抽奖结果失败', 'data' => null];
        }

        return [
            'code' => 1,
            'msg' => '预计算成功',
            'data' => [
                'results' => $precomputedResults['precomputedResults'],
                'current_xlh_periods_num' => $current_xlh_periods_num,
                'xlh_is_piao_ping' => $xlh_is_piao_ping,
                'availableGifts' => $precomputedResults['precomputedResultss'],
            ]
        ];
    }

    /**
     * 使用Alias Method预计算抽奖结果（O(1)复杂度）
     */
    private function precomputeResultsWithAliasMethod(
        $toarray,
        $num,
        $availableGifts,
        $giftInfoMap,
        &$totalDrawTimes,
        &$periods,
        &$currentXlhPeriodsNum,
        $xlhExt,
        $giftBagId,
        $roomId,
        $remaining_available_gifts
    ) {
        $precomputedResults = [];
        $precomputedResultss = [];
        $giftBagIdToGift = [];

        // 构建Alias表
        $aliasTable = $this->buildAliasTable($availableGifts);
        $remaining_num = 0;
        foreach ($toarray as $giftUserId) {
            if (!empty($remaining_available_gifts)) {
                foreach ($remaining_available_gifts as $key=>$value) {
                    $remaining_num += $value['remaining_number'];
                    $gift = $giftInfoMap[$value['foreign_id']] ?? null;
                    for ($j = 0; $j < $value['remaining_number']; $j++) {
                        $precomputedResults[] = [
                            'gift_user_id' => $giftUserId,
                            'gift_bag_detail' => $value,
                            'gift' => $gift,
                            'draw_times' => $totalDrawTimes,
                            'periods' => $periods,
                            'j' => $j,
                        ];
                        $totalDrawTimes++;
                        $currentXlhPeriodsNum++;

                    }
                    unset($remaining_available_gifts[$key]);
                }
                $numm = $num;
//                echo "好好玩";
            }else{
                $numm = $num+$remaining_num;
            }
//            echo $numm."---";
            for ($i = 0; $i < $numm; $i++) {
//                echo "好好呀";
                // 使用Alias Method选择礼物（O(1)复杂度）
                $selectedGift = $this->selectGiftWithAliasMethod($aliasTable);
                if (!$selectedGift) {
                    return [];
                }

                // 获取礼物信息（从预加载的map中获取，避免查询）
                $giftId = $selectedGift['foreign_id'];
                $gift = $giftInfoMap[$giftId] ?? null;
//                if (!$gift) {
//                    continue;
//                }

                $precomputedResults[] = [
                    'gift_user_id' => $giftUserId,
                    'gift_bag_detail' => $selectedGift,
                    'gift' => $gift,
                    'draw_times' => $totalDrawTimes,
                    'periods' => $periods,
                    'i' => $i,
                ];
                $precomputedResultss[] = [
                    'gift_user_id' => $giftUserId,
                    'gift_bag_detail' => $selectedGift,
                    'gift' => $gift,
                    'draw_times' => $totalDrawTimes,
                    'periods' => $periods,
                    'i' => $i,
                ];

                $totalDrawTimes++;
                $currentXlhPeriodsNum++;

                // 更新Alias表（模拟库存减少）
                $this->updateAliasTable($aliasTable, $selectedGift['id']);

                // 检查巡乐会状态
                if (!empty($xlhExt) && $xlhExt['inlet_bag_id'] == $giftBagId) {
                    if ($currentXlhPeriodsNum == $xlhExt['open_condition']['waiting_start_num']) {
                        $xlh_is_piao_ping = 1;
                    }
                    if ($currentXlhPeriodsNum == $xlhExt['open_condition']['start_num']) {
                        $xlh_is_piao_ping = 2;
                    }
                }
            }
        }

        return ['precomputedResults' => $precomputedResults,'precomputedResultss' => $precomputedResultss];
    }

    /**
     * 构建Alias表（O(n)复杂度，只执行一次）
     */
    private function buildAliasTable($gifts)
    {
        $n = count($gifts);
        if ($n === 0) return null;

        $totalRemaining = array_sum(array_column($gifts, 'remaining_number'));
        if ($totalRemaining <= 0) return null;

        // 初始化Alias表
        $small = [];
        $large = [];
        $prob = [];
        $alias = [];
        $indexMap = [];

        // 归一化概率并填充索引映射
        foreach ($gifts as $i => $gift) {
            $indexMap[$i] = $gift;
            $prob[$i] = $gift['remaining_number'] * $n / $totalRemaining;
            if ($prob[$i] < 1.0) {
                $small[] = $i;
            } else {
                $large[] = $i;
            }
        }

        // 构建Alias表
        while (!empty($small) && !empty($large)) {
            $s = array_pop($small);
            $l = array_pop($large);
            $alias[$s] = $l;
            $prob[$l] = ($prob[$l] + $prob[$s]) - 1.0;

            if ($prob[$l] < 1.0) {
                $small[] = $l;
            } else {
                $large[] = $l;
            }
        }

        return [
            'n' => $n,
            'prob' => $prob,
            'alias' => $alias,
            'index_map' => $indexMap,
            'gifts' => $gifts
        ];
    }

    /**
     * 使用Alias Method选择礼物（O(1)复杂度）
     */
    private function selectGiftWithAliasMethod($aliasTable)
    {
        if (!$aliasTable) return null;

        $n = $aliasTable['n'];
        $k = mt_rand(0, $n - 1);

        // 随机选择
        if (mt_rand() / mt_getrandmax() < $aliasTable['prob'][$k]) {
            return $aliasTable['index_map'][$k];
        } else {
            return $aliasTable['index_map'][$aliasTable['alias'][$k]] ?? null;
        }
    }

    /**
     * 更新Alias表（模拟库存减少）
     */
    private function updateAliasTable(&$aliasTable, $giftId)
    {
        // 查找礼物在Alias表中的位置
        $gifts = &$aliasTable['gifts'];
        $indexMap = &$aliasTable['index_map'];

        foreach ($gifts as &$gift) {
            if ($gift['id'] == $giftId) {
                $gift['remaining_number']--;
                break;
            }
        }

        // 重新构建Alias表（当剩余数量变化较大时）
        // 这里可以根据实际情况调整重建频率
        $totalRemaining = array_sum(array_column($gifts, 'remaining_number'));
        if ($totalRemaining <= 0) {
            $aliasTable = null;
        }
    }
    /**
     * 执行抽奖事务（核心操作）
     */
    private function executeDrawTransaction($bag_data, $user_id, $room_id, $num, $precomputedResults,$availableGiftss)
    {
        $bagGiftPrice = $bag_data['gift_price'] * $num;

        db::startTrans();
        try {
            // 1. 创建抽奖记录
            $boxTurntableLog = db::name('vs_blind_box_turntable_log')->insertGetId([
                'user_id' => $user_id,
                'gift_bag_id' => $bag_data['id'],
                'num' => $num,
                'room_id' => $room_id,
                'bag_price' => $bag_data['gift_price'],
                'createtime' => time()
            ]);

            if (!$boxTurntableLog) {
                throw new \Exception('添加盲盒转盘记录失败');
            }

            // 2. 批量更新库存
            $this->batchUpdateGiftInventory($availableGiftss, $room_id);

            // 3. 批量插入礼包发放记录
            $this->batchInsertGiftBagReceiveLog($user_id, $boxTurntableLog, $bag_data, $room_id, $precomputedResults);

            // 4. 扣除用户金币
            $this->deductUserCoins($user_id, $bagGiftPrice, $room_id);

            db::commit();

            // 5. 统计礼物数量
            $giftCounts = $this->countGifts($precomputedResults);

            return [
                'code' => 1,
                'msg' => '事务执行成功',
                'data' => [
                    'log_id' => $boxTurntableLog,
                    'gift_counts' => $giftCounts
                ]
            ];
        } catch (\Exception $e) {
            db::rollback();
            return ['code' => 0, 'msg' => $e->getMessage(), 'data' => null];
        }
    }

    /**
     * 批量更新礼物库存
     */
    private function batchUpdateGiftInventory($precomputedResults, $room_id)
    {
        // 按礼物ID分组统计需要减少的数量
        $inventoryUpdates = [];
        foreach ($precomputedResults as $result) {
            $giftId = $result['gift_bag_detail']['gift_bag_detail_id'];
            $inventoryUpdates[$giftId] = ($inventoryUpdates[$giftId] ?? 0) + 1;
        }

        // 批量更新
        foreach ($inventoryUpdates as $giftId => $count) {
            $ret = db::name("vs_room_pan")
                ->where([
                    'room_id' => $room_id,
                    'gift_bag_detail_id' => $giftId,
                    'remaining_number' => ['>=', $count]
                ])
                ->setDec('remaining_number', $count);

            if (!$ret) {
                throw new \Exception('更新礼物剩余数量失败');
            }
        }
    }

    /**
     * 批量插入礼包发放记录
     */
    private function batchInsertGiftBagReceiveLog($user_id, $boxTurntableLog, $bag_data, $room_id, $precomputedResults)
    {
        $batchInsertData = [];

        foreach ($precomputedResults as $result) {
            $batchInsertData[] = [
                'user_id' => $user_id,
                'gift_user_id' => $result['gift_user_id'],
                'parent_id' => $boxTurntableLog,
                'gift_bag_id' => $bag_data['id'],
                'gift_id' => $result['gift_bag_detail']['foreign_id'],
                'periods' => $result['periods'],
                'room_id' => $room_id,
                'gift_price' => $result['gift']['gift_price'],
                'bag_price' => $bag_data['gift_price'],
                'createtime' => time()
            ];
        }

        if (!empty($batchInsertData)) {
            $insertResult = db::name("vs_gift_bag_receive_log")->insertAll($batchInsertData);
            if (!$insertResult) {
                throw new \Exception('插入礼包发放记录失败');
            }
        }
    }

    /**
     * 扣除用户金币
     */
    private function deductUserCoins($user_id, $bagGiftPrice, $room_id)
    {
        $walletUpdate = model('GiveGift')->change_user_cion_or_earnings_log(
            $user_id,
            $bagGiftPrice,
            $room_id,
            1,
            10,
            '盲盒转盘抽奖消耗'
        );

        if (!$walletUpdate) {
            throw new \Exception('扣除用户金币失败');
        }

        $userLevel = model('Level')->user_level_data_update(
            $user_id,
            $bagGiftPrice,
            1,
            $room_id
        );

        if (!$userLevel) {
            throw new \Exception('用户等级更新失败');
        }
    }
    /**
     * 处理抽奖后的后续操作（非事务性）
     */
    private function handlePostDrawOperations(
        $precomputedResults,
        $boxTurntableLog,
        $room_id,
        $xlh_ext,
        $xlhIsPiaoPing,
        $currentXlhPeriodsNum,
        $room,
        $user_id
    ) {
        // 1. 批量插入盲盒转盘结果记录
        $this->batchInsertBlindBoxResults($precomputedResults, $boxTurntableLog, $room_id);

        // 2. 发送礼物给接收者
        $this->sendGiftsToRecipients($precomputedResults, $boxTurntableLog, $room_id,$user_id);

        // 3. 处理巡乐会相关操作
        if (!empty($xlh_ext) && $xlh_ext['inlet_bag_id'] == $precomputedResults[0]['gift_bag_detail']['gift_bag_id']) {
            $this->handleXlhOperations($room_id, $xlh_ext, $xlhIsPiaoPing, $currentXlhPeriodsNum,$room);
        }
    }

    /**
     * 批量插入盲盒转盘结果记录
     */
    private function batchInsertBlindBoxResults($precomputedResults, $boxTurntableLog, $room_id)
    {
        // 统计每个用户每个礼物的数量
        $giftUserCounts = [];
        foreach ($precomputedResults as $result) {
            $key = $result['gift_user_id'] . '_' . $result['gift_bag_detail']['foreign_id'];
            if (!isset($giftUserCounts[$key])) {
                $giftUserCounts[$key] = [
                    'gift_user_id' => $result['gift_user_id'],
                    'gift_id' => $result['gift_bag_detail']['foreign_id'],
                    'count' => 0,
                    'gift_price' => $result['gift']['gift_price']
                ];
            }
            $giftUserCounts[$key]['count']++;
        }

        // 批量插入
        $batchInsertData = [];
        foreach ($giftUserCounts as $userGift) {
            $batchInsertData[] = [
                'tid' => $boxTurntableLog,
                'gift_user_id' => $userGift['gift_user_id'],
                'gift_id' => $userGift['gift_id'],
                'count' => $userGift['count'],
                'gift_price' => $userGift['gift_price'],
                'all_gift_price' => $userGift['gift_price'] * $userGift['count'],
                'createtime' => time(),
                'heart_id' => 0
            ];
        }

        if (!empty($batchInsertData)) {
            db::name('vs_blind_box_turntable_results_log')->insertAll($batchInsertData);
        }
    }

    /**
     * 发送礼物给接收者
     */
    private function sendGiftsToRecipients($precomputedResults, $boxTurntableLog, $room_id,$user_id)
    {
        // 统计每个用户每个礼物的数量
        $giftUserCounts = [];
        foreach ($precomputedResults as $result) {
            $key = $result['gift_user_id'] . '_' . $result['gift_bag_detail']['foreign_id'];
            if (!isset($giftUserCounts[$key])) {
                $giftUserCounts[$key] = [
                    'gift_user_id' => $result['gift_user_id'],
                    'gift_id' => $result['gift_bag_detail']['foreign_id'],
                    'count' => 0,
                    'gift_price' => $result['gift']['gift_price']
                ];
            }
            $giftUserCounts[$key]['count']++;
        }

        // 批量发送礼物
        foreach ($giftUserCounts as $userGift) {
            $giveGiftExt = [
                'gift_id' => $userGift['gift_id'],
                'count' => $userGift['count'],
                'gift_price' => $userGift['gift_price'],
                'all_gift_price' => $userGift['gift_price'] * $userGift['count'],
                'is_draw_gift' => 1
            ];

            $res = model('Room')->room_gift(
                $user_id,
                $userGift['gift_user_id'],
                $userGift['gift_id'],
                $userGift['count'],
                1,
                $room_id,
                0,
                0,
                $giveGiftExt
            );

            if (isset($res) && $res['code'] != 1) {
                Log::record('发送礼物失败: ' . $res['msg'].$userGift['gift_user_id'],"info");
                return ['code' => 0, 'msg' => $res['msg'], 'data' => null];
//                \think\facade\Log::error('发送礼物失败: ' . $res['msg']);
            }
        }
    }

    /**
     * 处理巡乐会相关操作
     */
    private function handleXlhOperations($room_id, $xlh_ext, $xlhIsPiaoPing, $currentXlhPeriodsNum,$room)
    {
        if($room['xlh_periods_num'] < $xlh_ext['open_condition']['waiting_start_num'] && $currentXlhPeriodsNum >= $xlh_ext['open_condition']['waiting_start_num']){
            $xlhIsPiaoPing = 1;
        }
        if($room['xlh_periods_num'] < $xlh_ext['open_condition']['start_num'] && $currentXlhPeriodsNum >= $xlh_ext['open_condition']['start_num']){
            $xlhIsPiaoPing = 2;
        }

        // 更新房间巡乐会次数
        db::name("vs_room")->where('id', $room_id)->update([
            'xlh_periods_num' => $currentXlhPeriodsNum
        ]);

        // 处理飘屏
        if ($xlhIsPiaoPing == 1 || $xlhIsPiaoPing == 2) {
            $this->handleXlhPiaoPing($room_id, $xlh_ext, $xlhIsPiaoPing,$room);
        }

        // 更新巡乐会状态并推送
        $this->updateAndPushXlhStatus($room_id, $xlh_ext, $currentXlhPeriodsNum);
    }
    private function handleXlhPiaoPing($room_id, $xlh_ext, $xlhIsPiaoPing,$room){
        if($xlhIsPiaoPing == 1){
            // 即将开始推送飘屏
            $text = $room['room_name']."的巡乐会即将开始，请大家尽快参与哦!";
            // 推送礼物横幅
            $push = new Push(UID, $room_id);
            $text_list_new = [
                'text' => $text,
                'room_id' => $room_id,
                'from_type' => 1
            ];
            $push->xunlehui($text_list_new);
        }
        if($xlhIsPiaoPing == 2){
            // 正式开始推送飘屏
            $text = $room['room_name']."的巡乐会正式开始，请大家尽快参与哦!";
            // 推送礼物横幅
            $push = new Push(UID, $room_id);
            $text_list_new = [
                'text' => $text,
                'room_id' => $room_id,
                'from_type' => 2
            ];
            $push->xunlehui($text_list_new);
            // 巡乐会正式开始
            $this_xlh_periods = db::name('vs_room')->where('id',$room_id)->value('xlh_periods');
            $pan_xlh_id = db::name('vs_room_pan_xlh')->insertGetId([
                'room_id' => $room_id,
                'gift_id' => $xlh_ext['locking_condition']['locking_gift_id'],
                'homeowner_gift_id' => $xlh_ext['locking_condition']['give_homeowner_gift_id'],
                'periods' => $this_xlh_periods+1,
                'num' => 0,
                'end_time' => time() + $xlh_ext['locking_time']['end_time'] * 60,
                'createtime' => time()
            ]);
            if(!$pan_xlh_id){
                return ['code' => 0, 'msg' => '创建巡乐会失败!', 'data' => []];
            }
            db::name("vs_room")->where('id',$room_id)->setInc('xlh_periods');//修改巡乐会期数
        }
    }
    private function updateAndPushXlhStatus($room_id, $xlh_ext, $currentXlhPeriodsNum){
        $xlh['waiting_start_num'] = $xlh_ext['open_condition']['waiting_start_num'];//等待开奖次数
        $xlh['start_num'] = $xlh_ext['open_condition']['start_num'];//开始开奖次数
        // 当前抽奖次数
        $xlh['current_num'] = $currentXlhPeriodsNum;
        // 状态
        if($xlh['current_num'] >= $xlh_ext['open_condition']['start_num']){
            $xlh['status'] = 1;//状态 1:巡乐会开始 2:即将开始开始 0:等待开始
        } elseif($xlh['current_num'] >= $xlh_ext['open_condition']['waiting_start_num'] && $xlh['current_num'] < $xlh_ext['open_condition']['start_num']){
            $xlh['status'] = 2;//状态 1:巡乐会开始 2:即将开始开始 0:等待开始
        }else{
            $xlh['status'] = 0;
        }
        // 推送
        $text = [
            'xlh_data' => $xlh,
            'text' => ""
        ];
        // 聊天室推送系统消息
        model('Chat')->sendMsg(1056,$room_id,$text);
    }
    /**
     * 统计礼物数量
     */
    private function countGifts($precomputedResults)
    {
        $giftCounts = [];
        foreach ($precomputedResults as $result) {
            $giftId = $result['gift_bag_detail']['foreign_id'];
            if (!isset($giftCounts[$giftId])) {
                $giftCounts[$giftId] = [
                    'gift_id' => $giftId,
                    'count' => 0,
                    'gift_price' => $result['gift']['gift_price']
                ];
            }
            $giftCounts[$giftId]['count']++;
        }
        return $giftCounts;
    }

    /**
     * 构建抽奖结果
     */
    private function buildDrawResult($boxTurntableLog, $giftCounts)
    {
        $resultList = [];
        foreach ($giftCounts as $gift) {
            $resultList[] = [
                'gift_id' => $gift['gift_id'],
                'count' => $gift['count']
            ];
        }

        return [
            'code' => 1,
            'msg' => '成功',
            'data' => [
                'blind_box_turntable_id' => $boxTurntableLog,
                'reslut_list' => $resultList
            ]
        ];
    }
    /**
     * 计算奖池信息
     */
    private function calculatePoolInfo($gift_bag_id, $room_id)
    {
        $roomPanInfo = db::name("vs_gift_bag_detail")
            ->alias('a')
            ->join('vs_room_pan b', 'b.gift_bag_detail_id = a.id AND b.room_id = ' . $room_id)
            ->where(['a.gift_bag_id' => $gift_bag_id])
            ->field('SUM(a.quantity) as total_quantity, SUM(b.remaining_number) as total_remaining, MAX(b.periods) as periods')
            ->find();

        $totalQuantity = $roomPanInfo['total_quantity'] ?: 0;
        $totalRemaining = $roomPanInfo['total_remaining'] ?: 0;
        $periods = $roomPanInfo['periods'] ?: 0;
        $totalDrawTimes = max(0, $totalQuantity - $totalRemaining);

        return [
            'code' => 1,
            'msg' => '计算成功',
            'data' => [
                'total_quantity' => $totalQuantity,
                'total_remaining' => $totalRemaining,
                'periods' => $periods,
                'total_draw_times' => $totalDrawTimes
            ]
        ];
    }

    /**
     * 获取可用礼物
     */
    private function getAvailableGifts($gift_bag_id, $room_id, $total_draw_times)
    {
        $where = [
            'a.gift_bag_id' => $gift_bag_id,
            'a.quantity' => ['>', 0],
            'b.remaining_number' => ['>', 0],
            'b.room_id' => $room_id,
            'a.weight' => ['<=', $total_draw_times],
        ];

        return db::name("vs_gift_bag_detail")
            ->field('b.id,a.quantity,b.remaining_number,a.weight,a.foreign_id,a.gift_bag_id,b.gift_bag_detail_id')
            ->alias('a')
            ->join('vs_room_pan b', 'b.gift_bag_detail_id = a.id', 'left')
            ->where($where)
            ->select();
    }

    /**
     * 预加载礼物信息
     */
    private function preloadGiftInfo($available_gifts)
    {
        $giftIds = array_unique(array_column($available_gifts, 'foreign_id'));
        if (empty($giftIds)) return [];

        $gifts = db::name('vs_gift')
            ->where('gid', 'in', $giftIds)
            ->select();

        return array_column($gifts, null, 'gid');
    }

    /**
     * 重置奖池并重新加载
     */
    private function resetPoolAndReload($gift_bag_id, $room_id, $periods, $total_draw_times)
    {
        $this->reset_gift_pool($room_id, $gift_bag_id, $periods);
        return $this->getAvailableGifts($gift_bag_id, $room_id, $total_draw_times);
    }

    /**
     * 获取缓存的巡乐会配置
     */
    private function getCachedXlhConfig() {
        $cacheKey = "xlh_config_13";
        $ext = Cache::get($cacheKey);
        if (!$ext) {
            $bag_data = db::name("vs_gift_bag")
                ->field('id,name,ext,periods')
                ->where('id', 13)
                ->find();
            if (!$bag_data) {
                return [];
            }
            $ext = json_decode($bag_data['ext'], true);
            $ext['gift_bag_name'] = $bag_data['name'];
            Cache::set($cacheKey, $ext, 3600); // 缓存1小时
        }
        return $ext;
    }

    /**
     * 重置奖池
     * @param int $room_id 房间ID
     * @param int $gift_bag_id 礼物包ID
     * @param int $periods 期数
     */
    private function reset_gift_pool($room_id, $gift_bag_id, $periods,$remaining_available_gifts=[]) {
        // 重置奖池中所有礼物数量
        db::name("vs_room_pan")
            ->where(['room_id'=>$room_id,'gift_bag_id'=>$gift_bag_id])
            ->update([
                'remaining_number' => db::raw('(SELECT quantity FROM fa_vs_gift_bag_detail WHERE id = fa_vs_room_pan.gift_bag_detail_id)'),
                'periods' => $periods
            ]);
        if(!empty($remaining_available_gifts)){
            foreach ($remaining_available_gifts as $gift) {
                db::name("vs_room_pan")->where('id', $gift['id'])->setInc('remaining_number',$gift['remaining_number']);
            }
        }

        // 更新总期数
        db::name("vs_gift_bag")
            ->where('id', $gift_bag_id)
            ->setInc('periods');
    }

    /*
     * 获取可用礼物用于预计算
     */
    private function get_available_gifts_for_precompute($gift_bag_id, $room_id, $total_draw_times) {
        $where = [
            'a.gift_bag_id' => $gift_bag_id,
            'a.quantity' => ['>',0],
            'b.remaining_number' => ['>',0],
            'b.room_id' => $room_id,
            'a.weight' => ['<=', $total_draw_times],
        ];

        return db::name("vs_gift_bag_detail")
            ->field('a.id,a.quantity,b.remaining_number,a.weight,a.foreign_id')
            ->alias('a')
            ->join('vs_room_pan b','b.gift_bag_detail_id = a.id','left')
            ->where($where)
            ->select();
    }

    /*
     * 预计算单次抽奖结果
     */
    private function precompute_single_draw($gift_bag_id, $room_id, $available_gifts, $last_periods_remaining = []) {
        // 生成缓存键
        $available_cache_key = 'blindbox_available_gifts_' . $gift_bag_id . '_' . $room_id;
        $last_remaining_cache_key = 'blindbox_last_remaining_' . $gift_bag_id . '_' . $room_id;

        // 保证有可用礼物
        if (empty($available_gifts)) {
            return false;
        }

        $last_remaining_all = array_sum(array_column($last_periods_remaining, 'remaining_number'));
        if ($last_remaining_all == 0) {
            $last_periods_remaining = [];
            cache($last_remaining_cache_key, null);
        }

        $last_periods_remaining_flag = 0;
        if (!empty($last_periods_remaining)) {
            $available_gifts = $last_periods_remaining;
            $last_periods_remaining_flag = 1;
        }

        // 循环尝试直到抽中有效礼物
        $max_attempts = 5; // 最大尝试次数，防止无限循环
        $attempt = 0;
        $selected_gift = null;

        while ($attempt < $max_attempts && !$selected_gift) {
            // 实现加权随机算法：剩余数量越多，被抽中的概率越大
            $remaining = 0;
            foreach ($available_gifts as $gift) {
                $remaining += $gift['remaining_number'];
            }

            if ($remaining <= 0) {
                break; // 如果没有剩余数量，跳出循环
            }

            $rand_value = mt_rand(1, $remaining);
            $current_sum = 0;

            foreach ($available_gifts as $gift) {
                if ($gift['remaining_number'] <= 0) {
                    continue;
                }
                $current_sum += $gift['remaining_number'];
                if ($rand_value <= $current_sum) {
                    $selected_gift = $gift;
                    break;
                }
            }
            $attempt++;
        }
        if (!$selected_gift) {
            return false;
        }

        // 获取开出礼物的信息
        $gift = db::name("vs_gift")
            ->where(['gid' => $selected_gift['foreign_id']])
            ->find();

        if (!$gift) {
            return false;
        }

        // 操作缓存，减去缓存中对应数据数量
        foreach ($available_gifts as &$available_gifts_gift) {
            if ($selected_gift['id'] == $available_gifts_gift['id']) {
                $available_gifts_gift['remaining_number'] -= 1;
            }
        }
        if ($available_gifts_gift['remaining_number'] == 0) {
            unset($available_gifts_gift);
        }

        if ($last_periods_remaining_flag == 1) {
            // 操作上一轮奖池
            cache($last_remaining_cache_key, $available_gifts);
        } else {
            cache($available_cache_key, $available_gifts);
        }

        return [
            'gift_bag_detail' => $selected_gift,
            'gift' => $gift
        ];
    }

    /*
     * 寻乐会抽奖-----------------------------------------------------------------------------------------
     */
    /*
     * 巡乐会抽奖
     */
    /*
 * 巡乐会抽奖（优化版）
 */
    public function xlh_draw_gift($user_id, $num, $room_id)
    {
        $gift_bag_id = 13;

        // 1. 获取并缓存盲盒配置
        $cacheKey = "xlh_config_{$gift_bag_id}";
        $ext = $this->getCachedXlhConfig();

        // 2. 检查用户金币和房间状态
        $bag_gift_price = $ext['xlh_box_price'] * $num;
        $user_waller = db::name('user_wallet')->where(['user_id' => $user_id])->find();
        if (!$user_waller || $user_waller['coin'] < $bag_gift_price) {
            return ['code' => 0, 'msg' => '用户金币不足', 'data' => null];
        }

        $room = db::name('vs_room')
            ->field('id,room_name,is_open_blind_box_turntable,xlh_periods')
            ->where(['id' => $room_id])
            ->find();
        if (!$room || $room['is_open_blind_box_turntable'] != 1) {
            return ['code' => 0, 'msg' => '该房间未开启盲盒转盘', 'data' => null];
        }

        // 3. 检查巡乐会状态
        $pan_xlh = db::name('vs_room_pan_xlh')
            ->where(['room_id' => $room_id, 'periods' => $room['xlh_periods']])
            ->find();
        if (empty($pan_xlh)) {
            return ['code' => 0, 'msg' => '未开始', 'data' => null];
        }
        if ($pan_xlh['end_time'] <= time()) {
            return ['code' => 0, 'msg' => '本轮已结束', 'data' => null];
        }
        if ($pan_xlh['send_time'] != 0) {
            return ['code' => 0, 'msg' => '本轮已结束，礼物已发放', 'data' => null];
        }

        // 4. 预加载必要数据
        $room_pan_data = db::name("vs_room_pan")->alias('a')
            ->join('vs_gift_bag_detail b', 'a.gift_bag_detail_id = b.id')
            ->where(['a.room_id' => $room_id, 'a.gift_bag_id' => $gift_bag_id])
            ->field('a.id, a.gift_bag_detail_id, a.remaining_number, a.periods,b.weight,b.foreign_id')
            ->select();

        if (empty($room_pan_data)) {
            return ['code' => 0, 'msg' => '当前房间未配置抽奖礼物，请联系管理员', 'data' => []];
        }

        // 计算总数量和剩余数量
        $total_quantity = db::name("vs_gift_bag_detail")
            ->where(['gift_bag_id' => $gift_bag_id])
            ->sum('quantity');

        $total_remaining = array_sum(array_column($room_pan_data, 'remaining_number'));
        $total_draw_times = $total_quantity - $total_remaining;
        if ($total_draw_times < 0) $total_draw_times = 0;

        // 5. 获取可用礼物（提前过滤无效礼物）
        $available_gifts = [];
        foreach ($room_pan_data as $pan) {
            if ($pan['remaining_number'] > 0 && $pan['weight'] < $total_draw_times) {
                $available_gifts[] = $pan;
            }
        }

        if (empty($available_gifts)) {
            return ['code' => 0, 'msg' => '当前盲盒无可用礼物', 'data' => []];
        }

        // 6. 预计算抽奖结果
        $drawn_gifts = []; // 用于统计抽中结果
        $main_prize_updates = []; // 用于记录主奖品更新
        $is_zhong_jiang = 0;
        $pan_xlh_num = $pan_xlh['num'];

        // 批量处理配置
        $batch_size = min(10, $num); // 每批次处理10次
        $total_processed = 0;
        $all_results = []; // 存储所有抽奖结果

        while ($total_processed < $num) {
            $current_batch = min($batch_size, $num - $total_processed);
            db::startTrans();
            try {
                // 批量扣除金币（只在第一次事务中处理）
                if ($total_processed == 0) {
                    $wallet_update = model('GiveGift')->change_user_cion_or_earnings_log(
                        $user_id,
                        $bag_gift_price,
                        $room_id,
                        1,
                        10,
                        $ext['gift_bag_name'].'抽奖消耗'
                    );
                    if (!$wallet_update) {
                        throw new \Exception('扣除用户金币失败');
                    }

                    $user_level = model('Level')->user_level_data_update(
                        $user_id,
                        $bag_gift_price,
                        1,
                        $room_id
                    );
                    if (!$user_level) {
                        throw new \Exception('用户等级更新失败');
                    }
                }

                // 处理当前批次的抽奖
                $inventory_updates = []; // 用于记录库存变化
                $gift_details_map = []; // 礼物详情映射
                $remaining_available_gifts = $available_gifts;
                for ($i = 0; $i < $current_batch; $i++) {
                    // 从可用礼物中选择
                    $selected_gift = $this->selectGiftFromAvailable($available_gifts);
                    if (!$selected_gift) {
                        throw new \Exception('预计算抽奖失败');
                    }

                    // 记录库存变化
                    $inventory_updates[$selected_gift['id']] =
                        ($inventory_updates[$selected_gift['id']] ?? 0) + 1;

                    // 记录抽中结果
                    $gift_id = $selected_gift['foreign_id'];
                    $drawn_gifts[$gift_id] = ($drawn_gifts[$gift_id] ?? 0) + 1;

                    // 处理主奖品
                    if ($gift_id == $ext['locking_condition']['selected_gift_id']) {
                        $pan_xlh_num++;
                        $main_prize_updates[] = [
                            'num' => $pan_xlh_num,
                            'user_id' => $user_id,
                            'gift_id' => $gift_id
                        ];

                        // 计算延长时间
                        $add_end_time = $this->calculateEndTime($pan_xlh_num, $ext, $room_id);
                        $end_time = time() + $add_end_time;

                        // 记录主奖品更新
                        $main_prize_updates[count($main_prize_updates) - 1]['end_time'] = $end_time;
                    }

                    // 记录完整结果
                    $all_results[] = [
                        'gift_id' => $gift_id,
                        'gift_detail_id' => $selected_gift['id'],
                        'gift_bag_detail' => $selected_gift
                    ];

                    // 更新可用礼物缓存
                    foreach ($available_gifts as &$gift) {
                        if ($gift['id'] == $selected_gift['id']) {
                            $gift['remaining_number']--;
                            break;
                        }
                    }
                    unset($gift);

                    // 移除已无剩余数量的礼物
                    $available_gifts = array_filter($available_gifts, function($gift) {
                        return $gift['remaining_number'] > 0;
                    });

                    // 检查是否需要重置奖池
                    $total_remaining = array_sum(array_column($available_gifts, 'remaining_number'));
                    if ($total_remaining <= 0 && $total_processed + $i + 1 < $num) {
                        $this->reset_gift_pool($room_id, $gift_bag_id, $room_pan_data[0]['periods'] + 1,$remaining_available_gifts);
                        $available_gifts = $this->reloadGiftPool($room_id, $gift_bag_id);
                        if (empty($available_gifts)) {
                            throw new \Exception('重置奖池后仍无可用礼物');
                        }
                    }
                }

                // 批量更新库存
                foreach ($inventory_updates as $detail_id => $count) {
                    db::name("vs_room_pan")
                        ->where(['id' => $detail_id])
                        ->setDec('remaining_number', $count);
                }

                // 处理主奖品更新
                if (!empty($main_prize_updates)) {
                    $last_update = end($main_prize_updates);
                    db::name('vs_room_pan_xlh')->where('id', $pan_xlh['id'])->update([
                        'user_id' => $last_update['user_id'],
                        'pay_price' => $ext['xlh_box_price'],
                        'locking_gift_id' => $last_update['gift_id'],
                        'num' => $last_update['num'],
                        'end_time' => $last_update['end_time'],
                        'updatetime' => time()
                    ]);

                    db::name('vs_room_pan_xlh_log')->insert([
                        'xlh_id' => $pan_xlh['id'],
                        'user_id' => $last_update['user_id'],
                        'num' => $last_update['num'],
                        'locking_end_time' => $last_update['end_time'],
                        'createtime' => time()
                    ]);
                    $is_zhong_jiang = 1;
                }

                db::commit();
                $total_processed += $current_batch;
            } catch (\Exception $e) {
                db::rollback();
                return ['code' => 0, 'msg' => $e->getMessage(), 'data' => null];
            }
        }

        // 7. 批量处理结果记录
        try {
            db::startTrans();

            // 批量插入礼包发放记录
            $gift_records = [];
            $periods = $room_pan_data[0]['periods'] ?? 0;
            foreach ($drawn_gifts as $gift_id => $count) {
                $gift_records[] = [
                    'user_id' => $user_id,
                    'parent_id' => $pan_xlh['id'],
                    'gift_bag_id' => $gift_bag_id,
                    'gift_id' => $gift_id,
                    'periods' => $periods,
                    'room_id' => $room_id,
                    'num' => $count,
                    'gift_price' => $this->getGiftPrice($gift_id),
                    'bag_price' => $ext['xlh_box_price'],
                    'createtime' => time()
                ];
            }

            if (!empty($gift_records)) {
                db::name("vs_gift_bag_receive_log")->insertAll($gift_records);
            }

            // 批量处理用户礼物包
            foreach ($drawn_gifts as $gift_id => $count) {
                $res = model('UserGiftPack')->change_user_gift_pack(
                    $user_id,
                    $gift_id,
                    $count,
                    model('UserGiftPack')::XLH_DRAW_GIFT_GET,
                    "巡乐会抽奖所得"
                );
                if ($res['code'] != 1) {
                    throw new \Exception($res['msg']);
                }
            }

            // 添加活动记录
            Db::name('vs_activities_receive')->insert([
                'user_id' => $user_id,
                'activities_id' => 6,
                'room_id' => $room_id,
                'createtime' => time(),
                'updatetime' => time()
            ]);

            db::commit();
        } catch (\Exception $e) {
            db::rollback();
            return ['code' => 0, 'msg' => $e->getMessage(), 'data' => null];
        }

        // 8. 处理推送消息
        if ($is_zhong_jiang == 1) {
            $this->handlePrizeNotification($user_id,$gift_id, $room_id, $pan_xlh_num, $end_time, $room['room_name']);
        }

        // 9. 构建返回结果
        return $this->buildResult($drawn_gifts);
    }

    /**
     * 巡乐会抽奖-从可用礼物中选择一个
     */
    private function selectGiftFromAvailable(array &$available_gifts)
    {
        $remaining = array_sum(array_column($available_gifts, 'remaining_number'));
        if ($remaining <= 0) {
            return null;
        }

        $rand_value = mt_rand(1, $remaining);
        $current_sum = 0;

        foreach ($available_gifts as $gift) {
            if ($gift['remaining_number'] <= 0) {
                continue;
            }
            $current_sum += $gift['remaining_number'];
            if ($rand_value <= $current_sum) {
                return $gift;
            }
        }

        return null;
    }

    /**
     * 巡乐会抽奖-计算结束时间
     */
    private function calculateEndTime($pan_xlh_num, $ext, $room_id)
    {
        $cache_key = 'selected_gift_id_' . $room_id . $ext['locking_condition']['selected_gift_id'];

        if ($pan_xlh_num <= 1) {
            $add_end_time = $ext['locking_time']['tow_no_locking_time'] * 60;
            Cache::set($cache_key, $add_end_time, $add_end_time);
            return $add_end_time;
        }

        if (Cache::get($cache_key)) {
            $erci_xlh_num = Cache::get($cache_key);
            $add_end_time = $erci_xlh_num - $ext['locking_time']['next_time'] * 60;
            Cache::set($cache_key, $add_end_time, $add_end_time);
        } else {
            $add_end_time = ($ext['locking_time']['tow_no_locking_time'] - $ext['locking_time']['next_time']) * 60;
        }

        if ($add_end_time <= 30) {
            Cache::set($cache_key, 30, 30);
            return 30;
        }

        return $add_end_time;
    }

    /**
     * 巡乐会抽奖-重新加载奖池
     */
    private function reloadGiftPool($room_id, $gift_bag_id)
    {
        return db::name("vs_room_pan")->alias('a')
            ->join('vs_gift_bag_detail b', 'a.gift_bag_detail_id = b.id')
            ->where(['a.room_id' => $room_id, 'a.gift_bag_id' => $gift_bag_id])
            ->field('a.id, a.gift_bag_detail_id, a.remaining_number, a.periods,b.weight,b.foreign_id')
            ->select();
    }

    /**
     * 巡乐会抽奖-获取礼物价格
     */
    private function getGiftPrice($gift_id)
    {
        static $gift_prices = [];

        if (!isset($gift_prices[$gift_id])) {
            $gift_prices[$gift_id] = db::name("vs_gift")
                ->where(['gid' => $gift_id])
                ->value('gift_price');
        }

        return $gift_prices[$gift_id];
    }

    /**
     * 巡乐会抽奖-处理中奖通知
     */
    private function handlePrizeNotification($user_id,$gift_id, $room_id, $pan_xlh_num, $end_time, $room_name)
    {
        $FromUserInfo = db::name('user')->field('nickname,avatar')->where(['id' => $user_id])->find();
        $gift_info = db::name('vs_gift')->field('gift_name')->where(['gid' => $gift_id])->find();

        $text = [
            'gift_num' => $pan_xlh_num,
            'FromUserInfo' => $FromUserInfo,
            'end_time' => $end_time,
            'text' => $FromUserInfo['nickname'] . ' 用户在 ' . $room_name . ' 房间巡乐会中 ' . $gift_info['gift_name'] . '礼物 x 1 已收入背包'
        ];

        model('Chat')->sendMsg(1057, $room_id, $text);
    }

    /**
     * 巡乐会抽奖-构建返回结果
     */
    private function buildResult($drawn_gifts)
    {
        $result_list = [];
        $gift_info_cache = [];

        foreach ($drawn_gifts as $gift_id => $count) {
            if (!isset($gift_info_cache[$gift_id])) {
                $gift_info = db::name('vs_gift')
                    ->where(['gid' => $gift_id])
                    ->find();
                $gift_info_cache[$gift_id] = $gift_info;
            } else {
                $gift_info = $gift_info_cache[$gift_id];
            }

            $result_list[] = [
                'gift_id' => $gift_id,
                'gift_name' => $gift_info['gift_name'],
                'base_image' => $gift_info['base_image'],
                'gift_price' => $gift_info['gift_price'],
                'count' => $count,
            ];
        }

        // 按价格降序排序
        usort($result_list, function($a, $b) {
            return $b['gift_price'] <=> $a['gift_price'];
        });

        return ['code' => 1, 'msg' => '成功', 'data' => $result_list];
    }

}