<?php

namespace addons\shopro\service\partner;

use app\admin\model\shopro\partner\RateLog;
use app\admin\model\shopro\order\Order as OrderModel;
use app\admin\model\shopro\commission\CommissionGoods;

/**
 * 马豆汇率：rate = base * floor(N / n)
 */
class RateService
{
    public function currentRate()
    {
        $latest = RateLog::order('id', 'desc')->find();
        if ($latest && (float) $latest->rate > 0) {
            return (float) $latest->rate;
        }
        $cached = cache('partner_madow_current_rate');
        if ($cached !== null && $cached !== false && (float) $cached > 0) {
            return (float) $cached;
        }
        $rate = $this->calcRate($this->countN());
        cache('partner_madow_current_rate', $rate, 300);
        return $rate;
    }

    public function calcRate($n = null)
    {
        $n = $n === null ? $this->countN() : intval($n);
        $base = (float) PartnerConfig::get('partner_madow_base_rate', 0.00000075);
        $step = intval(PartnerConfig::get('partner_madow_step_orders', 1));
        $step = $step > 0 ? $step : 1;
        $multiple = max(1, floor($n / $step));
        return function_exists('bcmul') ? (float) bcmul((string) $base, (string) $multiple, 10) : (float) ($base * $multiple);
    }

    public function countN()
    {
        return $this->qualifiedOrderQuery()->count();
    }

    public function snapshot($settleDate, $gmv = 0, $extra = [])
    {
        $n = $this->countN();
        $rate = $this->calcRate($n);
        $row = RateLog::where('settle_date', $settleDate)->find();
        $data = array_merge([
            'settle_date' => $settleDate,
            'order_count_n' => $n,
            'rate' => $rate,
            'gmv' => $gmv,
            'createtime' => time(),
        ], $extra);
        if ($row) {
            $row->save($data);
            cache('partner_madow_current_rate', (float) $rate, 300);
            return $row;
        }
        $created = RateLog::create($data);
        cache('partner_madow_current_rate', (float) $rate, 300);
        return $created;
    }

    public function qualifiedOrderQuery($start = null, $end = null)
    {
        $goodsTable = (new CommissionGoods())->getQuery()->getTable();
        $orderTable = (new OrderModel())->getQuery()->getTable();
        $itemTable = \think\Db::name('shopro_order_item')->getTable();

        $query = OrderModel::alias('o')
            ->where('o.type', '<>', 'score')
            ->where('o.pay_fee', '>', 0)
            ->whereIn('o.status', [OrderModel::STATUS_PAID, OrderModel::STATUS_COMPLETED])
            ->whereExists(function ($q) use ($orderTable, $itemTable, $goodsTable) {
                $q->table($itemTable)->alias('oi')
                    ->join($goodsTable . ' cg', 'cg.goods_id = oi.goods_id')
                    ->whereRaw('oi.order_id = o.id')
                    ->where('cg.status', CommissionGoods::GOODS_COMMISSION_STATUS_ON);
            });

        if ($start !== null) {
            $query->where('o.paid_time', '>=', $start);
        }
        if ($end !== null) {
            $query->where('o.paid_time', '<=', $end);
        }
        return $query;
    }
}