<?php

namespace App\Service\v3\Implementations;

use App\Commons\Log;
use App\Constants\v3\ActivityType;
use App\Constants\v3\ErrorCode;
use App\Constants\v3\LogLabel;
use App\Constants\v3\SsdbKeys;
use App\Service\v3\Interfaces\GoodsActivityServiceInterface;
use App\Service\v3\Interfaces\GoodsInventoryServiceInterface;
use App\TaskWorker\SSDBTask;
use App\Model\v3\GoodsActivity;
use App\Model\v3\GoodsActivityBanner;
use Hyperf\Redis\Redis;
use Hyperf\Utils\ApplicationContext;
use Hyperf\Di\Annotation\Inject;

class GoodsActivityService implements GoodsActivityServiceInterface
{

    /**
     * @Inject
     * @var Log
     */
    protected $log;

    /**
     * @Inject
     * @var GoodsInventoryServiceInterface
     */
    protected $goodsInventoryService;

    public function do($goodsId)
    {

    }

    public function check(GoodsActivity $goods, $num, $userId)
    {

        if (empty($goods)) {
            return ErrorCode::GOODS_ACTIVITY_NOT_EXISTS;
        }

        // 活动是否已经结束
        if ($goods->expire_time < time()) {
            return ErrorCode::GOODS_ACTIVITY_EXPIRED;
        }

        // 商户歇业
        if(is_null($goods->store) || $goods->store->is_open == 0 || $goods->store->is_rest == 1){
            return ErrorCode::STORE_REST;
        }

        // 商品下架或已删除
        if($goods->on_sale == 0 || !is_null($goods->deleted_at)){
            return ErrorCode::GOODS_ACTIVITY_ON_SALE_NO;
        }

        // 商品库存不足
        // 获取冻结的库存
        $inventoryFrozen = $this->goodsInventoryService->getSold(2, $goods->id);
        // $inventoryFrozen = 0;
        if($goods->is_infinite != 1 && $goods->inventory < ($num+$inventoryFrozen)){
            return ErrorCode::GOODS_ACTIVITY_INVENTORY_ERROR;
        }

        // 是否超过限购数量
        if (($goods->restrict_num <= $inventoryFrozen || $goods->restrict_num <= 0) && $goods->restrict_num < $num) {
            return ErrorCode::GOODS_ACTIVITY_RESTRICT_LIMIT;
        }

        // 是否已经购买过（某个时间段内，时间段有商品的限制）
        $ssdb = ApplicationContext::getContainer()->get(SSDBTask::class);
        $hasBuy = $ssdb->exec('get', SsdbKeys::ACTIVITY_GOODS_BUY_RECORD.$userId.'_'.$goods->type.'_'.$goods->id);
        if ($hasBuy && $hasBuy >= $goods->time_limit_num) {
            return ErrorCode::GOODS_ACTIVITY_BUY;
        }

        return true;
    }

    public function undo()
    {
        // TODO: Implement undo() method.
    }

    public function getBanner($goodsId)
    {
        $banner = GoodsActivityBanner::query()->where('goods_id',$goodsId)->orderByDesc('type')->get();
        return $banner;
    }

    public function detail($goodsId)
    {
        $res = GoodsActivity::query()->with('store')->where('id',$goodsId)->first();
        return $res;
    }

    public function cacheRecord($goodsId, $num, $userId)
    {

        $goods = GoodsActivity::query()
            ->where('id', $goodsId)
            ->first();

        $ssdbKey = SsdbKeys::ACTIVITY_GOODS_BUY_RECORD.$userId.'_'.$goods->type.'_'.$goodsId;

        $expireTime = 0;
        if ($goods->time_limit_days >= 1) {
            $expireTime += strtotime(date('Y-m-d 23:59:59')) - time();
            $expireTime += ($goods->time_limit_days-1) * 86400;
        } elseif ($goods->time_limit_days > 0 && $goods->time_limit_days < 1) {
            $expireTime += bcmul($goods->time_limit_days,86400,0);
        } else {
            return;
        }

        $ssdb = ApplicationContext::getContainer()->get(SSDBTask::class);

        if (!$ssdb->exec('exists', $ssdbKey)) {
            $ssdb->exec('set', $ssdbKey, $num);
            $ssdb->exec('expire', $ssdbKey, $expireTime);
        } else {
            $ssdb->exec('incr', $ssdbKey, $num);
        }

    }

    public function clearCacheRecord($goodsId, $num, $userId)
    {
        $goods = GoodsActivity::query()
            ->where('id', $goodsId)
            ->first();
        if (empty($goods)) {
            return true;
        }
        $ssdbKey = SsdbKeys::ACTIVITY_GOODS_BUY_RECORD.$userId.'_'.$goods->type.'_'.$goodsId;

        $ssdb = ApplicationContext::getContainer()->get(SSDBTask::class);

        if ($ssdb->exec('exists', $ssdbKey)) {
            $res = $ssdb->exec('incr', $ssdbKey, -1*$num);
        }
    }

    /**
     * 统计订单中活动商品的数量，并校验
     * @param $goodsIds
     * @param int $limitNum
     * @return bool
     */
    public function checkOrderActivityCount($goodsIds, $limitNum=1)
    {

        $sourceGoods = GoodsActivity::query()
            ->whereIn('id', $goodsIds)
            ->get()->toArray();

        $redis = ApplicationContext::getContainer()->get(Redis::class);
        $activityTypeLimitNumsKey = 'activity_type_limit_nums';
        $limitNums = $redis->hGetAll($activityTypeLimitNumsKey);

        if (empty($limitNums)) {

            $limitNums = [
                ActivityType::FLASH_SALE => 0,
                ActivityType::GROUP_BUY => 0,
                ActivityType::NEW_PRODUCT => 0,
            ];
        }

        $buyNum = [
            ActivityType::FLASH_SALE => 0,
            ActivityType::GROUP_BUY => 0,
            ActivityType::NEW_PRODUCT => 0,
        ];

        foreach ($sourceGoods as $key => &$goods) {

            if ($limitNums[$goods['type']] == 0) { // 不限制同类购买商品种数，也就是可以同时购买多款不同商品
                continue;
            }

            $buyNum[$goods['type']] += 1;
            if ($buyNum[$goods['type']] > $limitNums[$goods['type']]) {
                return false;
            }
        }

        return true;
    }
}