<?php

namespace refill;

//监控，手机卡号在指定的多个通道中，保持充值中唯一性
//如果订单成功，在指定时间段里面，不能继续充值
class sending_monitor
{
    private static $stChannelNames = [];//beirui_nation

    private const SENDING = 1;
    private const SUCC = 2;
    private const SUCC_INTERVAL_SECS = 900;

    public function can_add($card_no, $ch_name)
    {
        if (!in_array($ch_name, sending_monitor::$stChannelNames)) {
            return true;
        }

        $ret = $this->read($card_no);
        if ($ret === false) {
            return true;
        }

        [$ch_name, $time, $state] = $ret;
        if (!in_array($ch_name, sending_monitor::$stChannelNames)) {
            //如果限制的通道发生变化了，过去的数据无效处理。
            dcache('unique_sending_monitor', 'refill-', $card_no);
            return true;
        }

        if ($state === sending_monitor::SUCC)
        {
            if (time() - $time >= sending_monitor::SUCC_INTERVAL_SECS) {
                return true;
            } else {
                return false;
            }
        }
        elseif ($state === sending_monitor::SENDING) {
            return false;
        }
        else {
            return true;
        }
    }

    public function add($card_no, $chname)
    {
        if (!in_array($chname, sending_monitor::$stChannelNames)) {
            return;
        }

        $this->write($card_no, $chname, sending_monitor::SENDING);
    }

    public function success($card_no, $chname)
    {
        if (!in_array($chname, sending_monitor::$stChannelNames)) {
            return;
        }

        $this->write($card_no, $chname, sending_monitor::SENDING);
    }

    public function fail($card_no, $chname)
    {
        if (!in_array($chname, sending_monitor::$stChannelNames)) {
            return;
        }

        $name = 'unique_sending_monitor';
        dcache($name, 'refill-', $card_no);
    }

    private function write($card_no, $chname, $state)
    {
        $name = 'unique_sending_monitor';
        $data = [$card_no => json_encode([$chname, time(), $state])];
        wcache($name, $data, 'refill-');
    }

    private function read($card_no)
    {
        $name = 'unique_sending_monitor';
        $ret = rcache($name, 'refill-', $card_no);

        if (empty($ret)) {
            return false;
        }

        $values = $ret[$card_no];
        [$chname, $time, $state] = json_decode($values, true);

        return [$chname, $time, $state];
    }
}