<?php

namespace backend\modules\admin\services;

use common\enums\OrderStatusEnum;
use common\enums\RedisKeyEnum;
use common\enums\StatusEnum;
use common\models\census\CensusMall;
use common\models\census\CensusMallGoods;
use common\models\census\CensusMallSingleDay;
use common\models\mall\Mall;
use common\models\order\Order;
use common\models\order\OrderDetail;
use common\models\statistics\UserStatistics;
use common\models\statistics\UserStatisticsTotal;
use common\models\user\User;
use Yii;

/**
 * 系统配置
 * Namespace backend\modules\admin\services
 * @Author：lun
 * @Date：2024-09-18 18:07
 * @Copyright：copyright（c）2024 广东七件事集团
 */
class SystemService extends BaseService
{
    /**
     * 获取系统配置
     * @Author：lun
     * @Date：2024-09-18 18:15
     * @Copyright：copyright（c）2024 广东七件事集团
     * @return array | bool
     */
    public static function getSystemConfig()
    {
        $status = 0;// 状态[0=失败，1=成功]
        $data = [];// 返回数据
        $msg = '';// 返回信息
        try {
            if (stripos(PHP_OS, 'LINUX') !== false) {// 判断是否是 Linux 系统
                $status = 1;
                $data = self::getLinuxStatus();
            } else {
                $status = 0;
                $msg = '系统暂不支持';
            }
        } catch (\Exception $e) {
            $msg = '第' . $e->getLine() . '行，错误信息：' .$e->getMessage();
        }
        return ['status' => $status, 'data' => $data, 'msg' => $msg];
    }

    /**
     * 获取系统状态
     * @Author：lun
     * @Date：2024-09-18 18:51
     * @Copyright：copyright（c）2024 广东七件事集团
     * @return array
     */
    public static function getLinuxStatus()
    {
        $cpu = self::getCpuUsagePercent();
        $memory = self::getMemoryPercent();
        $disk = self::getDiskPercent();
        $redis = self::getRedisPercent();
        $site_num = Mall::getMallCount();
        return compact('cpu', 'memory', 'disk', 'redis', 'site_num');
    }

    /**
     * 获取内存使用率
     * @Author：lun
     * @Date：2024-09-18 18:46
     * @Copyright：copyright（c）2024 广东七件事集团
     * @return array
     */
    public static function getMemoryPercent()
    {
        exec('free -m', $output);
        $memoryInfo = explode("\n", $output[1]);
        $memoryParts = preg_split('/\s+/', $memoryInfo[0]);
        $total = $memoryParts[1];// 总内存
        $use_total = $memoryParts[2];// 已使用内存
        $freeMemory = $memoryParts[3];// 可用内存
        $percent = round(($use_total / $total) * 100, 2);
        return compact('use_total','total','percent');
    }

    /**
     * 获取磁盘使用率
     * @Author：lun
     * @Date：2024-09-19 17:20
     * @Copyright：copyright（c）2024 广东七件事集团
     * @return array
     */
    public static function getDiskPercent()
    {
        $use_total = $percent = 0;
        $total = disk_total_space("/"); // 更改为你想检测的磁盘路径
        if ($total == 0) return compact('use_total','total','percent');

        // 检测磁盘剩余空间
        $freeDiskSpace = disk_free_space("/"); // 更改为你想检测的磁盘路径

        // 计算磁盘使用率
        $use_total = $total - $freeDiskSpace;
        $percent = round(($use_total / $total) * 100, 2);
        return compact('use_total','total','percent');
    }

    /**
     * 获取CPU使用率
     * @Author：lun
     * @Date：2024-09-18 18:46
     * @Copyright：copyright（c）2024 广东七件事集团
     * @return float
     */
    public static function getCpuUsagePercent() {
        $prevStats = self::getCpuStats();
        sleep(1);
        $currStats = self::getCpuStats();

        $prevIdle = $prevStats['idle'] + $prevStats['iowait'];
        $prevNonIdle = $prevStats['user'] + $prevStats['nice'] + $prevStats['system'] + $prevStats['irq'] + $prevStats['softirq'];
        $prevTotal = $prevIdle + $prevNonIdle;

        $currIdle = $currStats['idle'] + $currStats['iowait'];
        $currNonIdle = $currStats['user'] + $currStats['nice'] + $currStats['system'] + $currStats['irq'] + $currStats['softirq'];
        $currTotal = $currIdle + $currNonIdle;

        $diffTotal = $currTotal - $prevTotal;
        $diffIdle = $currIdle - $prevIdle;

        return round((1 - $diffIdle / $diffTotal) * 100);
    }

    /**
     * 获取CPU使用情况
     * @Author：lun
     * @Date：2024-09-18 18:46
     * @Copyright：copyright（c）2024 广东七件事集团
     * @return int[]
     */
    public static function getCpuStats() {
        exec('cat /proc/stat', $output);
        $parts = preg_split('/\s+/', $output[0]);
        return [
            'user' => (int)$parts[1],
            'nice' => (int)$parts[2],
            'system' => (int)$parts[3],
            'idle' => (int)$parts[4],
            'iowait' => (int)$parts[5],
            'irq' => (int)$parts[6],
            'softirq' => (int)$parts[7]
        ];
    }

    /**
     * 获取Redis使用率
     * @Author：lun
     * @Date：2024-09-19 16:57
     * @Copyright：copyright（c）2024 广东七件事集团
     * @return array
     */
    public static function getRedisPercent()
    {
        $redis = Yii::$app->redis;

        // 执行 INFO 命令
        $info = $redis->executeCommand('INFO', ['memory']);
        $lines = explode("\r\n", $info);
        $memoryUsage = [];

        foreach ($lines as $line) {
            if (strpos($line, ':') !== false) {
                list($key, $value) = explode(':', $line, 2);
                $memoryUsage[$key] = $value;
            }
        }
        $percent = 0;
        $use_total = empty($memoryUsage['use_memory']) ? 0 : $memoryUsage['use_memory'] / (1024 * 1024);// 已使用内存
        $total = empty($memoryUsage['maxmemory']) ? 0 : $memoryUsage['maxmemory'] / (1024 * 1024);// 最大内存
        if ($use_total > 0 && $total > 0) {// Redis 未开启内存限制，则返回 0
            $percent = round(($use_total / $total) * 100, 2);
        }

        return compact('use_total', 'total', 'percent');
    }

    /**
     * 概括数据
     * @return array
     */
    public static function getWraparound()
    {
        $oneStatus = [
            'total_money' => 0,
            'total_users' => 0,
            'total_orders' => 0,
            'total_sales' => 0,
            'total_profit' => 0,
        ];
        // 获取一级概括数据
        try {
            $mallModel = CensusMall::find()
                ->distinct('mall_id')
                ->where(['status' => StatusEnum::ENABLED])
                ->asArray()
                ->orderBy('id desc');

            $batchSize = 1000;
            foreach ($mallModel->batch($batchSize) as $mallList) {
                foreach ($mallList as $item) {
                    $oneStatus['total_users'] += $item['total_users'];
                    $oneStatus['total_orders'] += $item['total_orders'];
                    $oneStatus['total_money'] = bcadd($oneStatus['total_money'], $item['total_pay_money'], 2);
                }
            }
        } catch (\Exception $e) {
            // 处理异常
            Yii::error("Error fetching mall data: " . $e->getMessage());
        }

        // 获取一级概括数据
        try {
            $mallGoodsModel = CensusMallGoods::find()
                ->distinct('mall_id')
                ->where(['status' => StatusEnum::ENABLED])
                ->asArray()
                ->orderBy('id desc');

            foreach ($mallGoodsModel->batch($batchSize) as $mallGoodsList) {
                foreach ($mallGoodsList as $item) {
                    $oneStatus['total_sales'] += $item['total_sales_volume'];
                }
            }
        } catch (\Exception $e) {
            // 处理异常
            Yii::error("Error fetching mall goods data: " . $e->getMessage());
        }

        // 获取总利润(不计算已关闭订单)
        try {
            $orderDetailModel = OrderDetail::find()
                ->where(['status' => [StatusEnum::ENABLED, StatusEnum::DISABLED]])
                ->andWhere(['!=', 'order_status', OrderStatusEnum::REPEAL])
                ->asArray()
                ->orderBy('id desc');

            foreach ($orderDetailModel->batch($batchSize) as $orderDetailList) {
                foreach ($orderDetailList as $item) {
                    $profit = bcsub($item['goods_price'], bcmul($item['cost_price'], $item['num'], 2), 2);
                    $oneStatus['total_profit'] = bcadd($oneStatus['total_profit'], $profit, 2);
                }
            }
        } catch (\Exception $e) {
            // 处理异常
            Yii::error("Error fetching order detail data: " . $e->getMessage());
        }

        // 获取销售额排名
        try {
            $yesterdayDate = date('Ymd', strtotime('-1 day'));
            $yesterdayMoneySubquery = (new \yii\db\Query())
                ->select('sum(pay_money) as total_money')
                ->from(UserStatistics::tableName() . ' ut2')
                ->where(['ut.mall_id' => new \yii\db\Expression('ut2.mall_id'), 'ut2.status' => 1, 'ut2.date' => $yesterdayDate]);

            $threeStatus['total_achievement_ranking'] = UserStatisticsTotal::find()
                ->alias('ut')
                ->leftJoin(Mall::tableName() . ' mall', 'mall.id=ut.mall_id')
                ->select([
                    'sum(ut.pay_money) as total_money',
                    'mall.name as mall_name',
                    'mall.id as mall_id',
                    'IFNULL((' . $yesterdayMoneySubquery->createCommand()->getRawSql() . '), 0) as yesterdayMoney'
                ])
                ->where(['ut.status' => StatusEnum::ENABLED])
                ->groupBy('ut.mall_id')
                ->orderBy('total_money desc')
                ->limit(10)
                ->asArray()
                ->all();

            foreach ($threeStatus['total_achievement_ranking'] as &$item) {
                $item['logo'] = Yii::$app->services->setting->mall->get($item['mall_id'], 'basic.logo');
                if (empty($item['logo'])) {
                    $item['logo'] = Yii::$app->request->hostInfo . '/resources/img/admin/mall-logo.png';
                }
            }
            unset($item);
        } catch (\Exception $e) {
            // 处理异常
            Yii::error("Error fetching achievement ranking data: " . $e->getMessage());
        }


        // 获取热销商品排名
        $threeStatus['sales_volume_ranking'] = CensusMallGoods::find()
            ->with([
                'goods' => function ($query) {
                    $query->select(['id', 'goods_name', 'cover_pic']);
                },
                'mall' => function ($query) {
                    $query->select(['id', 'name']);
                }
            ])
            ->where(['status' => StatusEnum::ENABLED])
            ->orderBy('total_pay_money desc')
            ->select('total_pay_money, goods_id, mall_id')
            ->limit(10)
            ->asArray()
            ->all();
        // 获取热销商品排名
        $threeStatus['hot_sales_goods_ranking'] = CensusMallGoods::find()
            ->with([
                'goods' => function ($query) {
                    $query->select(['id', 'goods_name', 'cover_pic']);
                },
                'mall' => function ($query) {
                    $query->select(['id', 'name']);
                }
            ])
            ->where(['status' => StatusEnum::ENABLED])
            ->orderBy('total_sales_volume desc')
            ->select('total_sales_volume, goods_id, mall_id')
            ->limit(10)
            ->asArray()
            ->all();
        $threeStatus['sales_volume_ranking'] = self::getSalesRanking('total_pay_money');
        $threeStatus['hot_sales_goods_ranking'] = self::getSalesRanking('total_sales_volume');
        return compact('oneStatus', 'threeStatus');
    }

    public static function getSalesRanking($orderByField): array
    {
        try {
            return CensusMallGoods::find()
                ->with([
                    'goods' => function ($query) {
                        $query->select(['id', 'goods_name', 'cover_pic']);
                    },
                    'mall' => function ($query) {
                        $query->select(['id', 'name']);
                    }
                ])
                ->where(['status' => StatusEnum::ENABLED])
                ->orderBy($orderByField . ' desc')
                ->select([$orderByField, 'goods_id', 'mall_id'])
                ->limit(10)
                ->asArray()
                ->all();
        } catch (\Exception $e) {
            // 处理异常
            Yii::error("Error fetching sales ranking data: " . $e->getMessage());
            return [];
        }
    }

    public static function getSaleTrend()
    {
        // 获取用户活跃度
        $currentDate = date('Y-m-d', time());
        $saleTrendList = [];
        // 获取用户活跃度数据
        $censusMall = CensusMallSingleDay::find()
            ->where(['status' => StatusEnum::ENABLED])
            ->select('date, sum(total_actives) as total_actives, sum(add_users) as add_users, sum(add_pay_people_nums) as add_pay_people_nums')
            ->groupBy('date')
            ->asArray()
            ->all();
        if (!empty($censusMall)) $censusMall = array_column($censusMall, null, 'date');
        for ($i = 0; $i < 7; $i++) { // 获取最近7天数据
            $nowDay = $currentDate;
            if ($i > 0) {
                $nowDay = date("Y-m-d", strtotime("-" . $i . " day", strtotime($currentDate)));
            }
            $item = [
                'date' => date("m-d", strtotime($nowDay)),
                'total_actives' => isset($censusMall[$nowDay]) ? $censusMall[$nowDay]['total_actives'] : 0,
                'add_users' => isset($censusMall[$nowDay]) ? $censusMall[$nowDay]['add_users'] : 0,
                'add_pay_users' => isset($censusMall[$nowDay]) ? $censusMall[$nowDay]['add_pay_people_nums'] : 0,
            ];
            $saleTrendList[] = $item;

        }
        sort($saleTrendList);
        // 销售趋势
        return compact('saleTrendList');
    }

    public static function getSaleTrendByMonth(string $type = 'month')
    {
        // 获取销售额趋势(因为前端只有周和月所以默认获取前7个月订单)
        $currentMonth = date('Y-m', time());
        $eventMonth = date('Y-m', strtotime("-7 month", strtotime($currentMonth)));
        $orderDetailGroupBy = 'year, month';
        if ($type == 'week') {
            $orderDetailGroupBy = 'year, month, week';
        }
        // 销售额(订单支付金额) 利润(总销售额-总成本)
        $orderDetailSql = "sum(goods_price) as goods_price, sum(goods_price - cost_price) as profit_price, 
                            YEAR(FROM_UNIXTIME(created_at)) as year, MONTH(FROM_UNIXTIME(created_at)) as month, WEEK(FROM_UNIXTIME(created_at)) as week";
        $orderDetailModel = OrderDetail::find()
            ->where(['status' => [StatusEnum::ENABLED, StatusEnum::DISABLED]])
            ->andWhere(['!=', 'order_status', OrderStatusEnum::REPEAL])
            ->andWhere(['>=', 'created_at', strtotime($eventMonth)])
            ->select($orderDetailSql)
            ->asArray()
            ->groupBy($orderDetailGroupBy)
            ->orderBy('year desc, month desc')
            ->limit(6)
            ->all();
        return compact('orderDetailModel');
    }
}