<?php

namespace refill;

class transfer
{
    private $mMchid2Infos;
    public function __construct()
    {
        $this->load();
    }

    private static $stInstance = null;
    public static function instance()
    {
        if (self::$stInstance == null) {
            self::$stInstance = new transfer();
        }

        return self::$stInstance;
    }

    public function load()
    {
        $mch_checker = function ($mchid) {
            $item = Model()->table('merchant')->field('mchid,admin_id')->where(['mchid' => $mchid])->find();
            return intval($item['admin_id']);
        };

        $this->mMchid2Infos = [];
        $i = 0;
        while (true)
        {
            $start = $i * 1000;
            $items = Model()->table('merchant')->field('mchid,transfer_cfg')->order('mchid asc')->limit("{$start},1000")->select();
            if(empty($items)) {
                return;
            }
            $i++;

            foreach ($items as $item)
            {
                $transfer_cfg = $item['transfer_cfg'];

                if(empty($transfer_cfg)) {
                    continue;
                }

                $transfer_cfg = unserialize($transfer_cfg);
                if($transfer_cfg === false) {
                    continue;
                }

                $mchid = intval($item['mchid']);
                $opened = intval($transfer_cfg['transfer_opened']);
                $tmchid = intval($transfer_cfg['transfer_mchid']);
                $lowestratio = round($transfer_cfg['transfer_lowestratio'], 3);

                $card_types = $transfer_cfg['card_types'] ?? [];

                if ($opened == 1 and $tmchid > 0 and $tmchid != $mchid and $lowestratio > 0.001)
                {
                    $admin_id = $mch_checker($tmchid);
                    if ($admin_id > 0) {
                        $this->mMchid2Infos[$mchid] = ['transfer_mchid' => $tmchid,
                            'admin_id' => $admin_id,
                            'lowestratio' => $lowestratio,
                            'card_types' => $card_types];
                    }
                }
            }
        }
    }

    public function need_transfer($mchid,$card_type,&$lowestratio)
    {
        if(array_key_exists($mchid,$this->mMchid2Infos))
        {
            $transfer_cfg = $this->mMchid2Infos[$mchid];
            $lowestratio = $transfer_cfg['lowestratio'];
            $card_types = $transfer_cfg['card_types'];

            if (!in_array($card_type, $card_types)) {
                return true;
            }
        }

        return false;
    }

    public function transfer_info($mchid)
    {
        if(array_key_exists($mchid,$this->mMchid2Infos))
        {
            $transfer_cfg = $this->mMchid2Infos[$mchid];
            $transfer_mchid = $transfer_cfg['transfer_mchid'];
            $admin_id = $transfer_cfg['admin_id'];

            return [$transfer_mchid,$admin_id];
        }

        return [0,0];
    }

    public function transfers()
    {
        return $this->mMchid2Infos;
    }
}