<?php

use Query\Operator;

/**
 * Class Pos.
 */
class PosBase
{
    use \DatabaseCommunication;

    protected $start_datetime;
    protected $end_datetime;

    protected $specific_pos = false;

    /* @var Decimal sum sum */
    protected $sum;

    public const METHODS = [
        0 => 'Zaokrouhlení',
        1 => 'Zaplaceno v hotovosti',
        2 => 'Zaplaceno kartou',
        3 => 'Zadáno na fakturu',
        4 => 'Vloženo do kasy',
        5 => 'Vybráno z kasy',
        6 => 'Zaplaceno převodem',
        7 => 'Zaplaceno dobírkou',
        8 => 'Zaplaceno online',
        9 => 'Vyrovnání pokladny',
        101 => 'SK EET Úhrada faktury - hotově',
        102 => 'SK EET Úhrada faktury - kartou',
    ];

    public function __construct()
    {
        $this->sum = DecimalConstants::zero();
    }

    public function getPayments()
    {
        $stats = [];

        $vats = $this->getQueryBuilder()->select('*')->from('vats');

        if (findModule(\Modules::OSS_VATS)) {
            $vats->andWhere(Operator::equals(['automanaged' => 0]));
        }

        foreach ($vats->execute()->fetchAll() as $vat) {
            $stats[Payment::METHOD_CASH][$vat['vat']] = $this->getSumByVat(Payment::METHOD_CASH, $vat['vat']);

            $stats[Payment::METHOD_CARD][$vat['vat']] = $this->getSumByVat(Payment::METHOD_CARD, $vat['vat']);

            $stats[Payment::METHOD_INVOICE][$vat['vat']] = $this->getSumByVat(Payment::METHOD_INVOICE, $vat['vat']);
        }

        $stats[Payment::METHOD_CASH_INSERTION] = $this->getSum(Payment::METHOD_CASH_INSERTION);

        $this->sum = $this->sum->sub($stats[Payment::METHOD_CASH_INSERTION]);

        $stats[Payment::METHOD_CASH_SELECTION] = $this->getSum(Payment::METHOD_CASH_SELECTION);

        $this->sum = $this->sum->sub($stats[Payment::METHOD_CASH_INSERTION]);

        $stats[Payment::METHOD_COMPENSATION] = $this->getSum(Payment::METHOD_COMPENSATION);

        $stats[0] = &$this->sum;

        return $stats;
    }

    protected function getSumByVat($method, $vat)
    {
        $qb = $this->getQueryBuilder()
            ->select('DISTINCT (oi.id)')
            ->from('order_items', 'oi')
            ->leftJoin('oi', 'order_payments', 'op', 'oi.id_order = op.id_order')
            ->andWhere(
                $this->getQueryBuilder()->expr()->eq('op.method', $method)
            )
            ->andWhere(
                $this->getQueryBuilder()->expr()->eq('oi.tax', $vat)
            );

        $this->addDates($qb);

        $this->selectPOS($qb);

        $qb2 = $this->getQueryBuilder()
            ->select('SUM(oi2.total_price)')
            ->from('order_items', 'oi2')
            ->where(
                $this->getQueryBuilder()->expr()->in('oi2.id', $qb->getSQL())
            )
            ->setParameters($qb->getParameters());

        $qr = $qb2->execute();

        $val = $qr->fetchColumn();

        $this->sum = $this->sum->sub(toDecimal($val)->addVat($vat));

        return toDecimal($val);
    }

    protected function getSum($method)
    {
        $qb = $this->getQueryBuilder()
            ->select('SUM(price) as sum')
            ->from('order_payments', 'op')
            ->andWhere(
                $this->getQueryBuilder()->expr()->eq('op.method', $method)
            );

        $this->addDates($qb);

        $this->selectPOS($qb);

        $qr = $qb->execute();

        $val = $qr->fetchColumn();

        return toDecimal($val);
    }

    public function getActuallyCashInPOS()
    {
        $qb = $this->getQueryBuilder()
            ->select('SUM(price) as sum')
            ->from('order_payments', 'op')
            ->andWhere(
                $this->getQueryBuilder()->expr()->orX(
                    $this->getQueryBuilder()->expr()->eq('method', ':cash'),
                    $this->getQueryBuilder()->expr()->eq('method', ':selection'),
                    $this->getQueryBuilder()->expr()->eq('method', ':insertion'),
                    $this->getQueryBuilder()->expr()->eq('method', ':compensation')
                )
            )
            ->setParameters([
                'cash' => Payment::METHOD_CASH,
                'selection' => Payment::METHOD_CASH_SELECTION,
                'insertion' => Payment::METHOD_CASH_INSERTION,
                'compensation' => Payment::METHOD_COMPENSATION,
            ]);

        if ($this->getEndDatetime()) {
            $qb->andWhere('op.date < :end_datetime')
                ->setParameter('end_datetime', $this->getEndDatetime());
        }

        $this->selectPOS($qb);

        $qr = $qb->execute();

        return toDecimal($qr->fetchColumn());
    }

    public function getSales()
    {
        $qb = $this->getQueryBuilder()
            ->select('SUM(price)')
            ->from('order_payments', 'op')
            ->andWhere(
                $this->getQueryBuilder()->expr()->orX(
                    $this->getQueryBuilder()->expr()->eq('method', ':cash'),
                    $this->getQueryBuilder()->expr()->eq('method', ':card'),
                    $this->getQueryBuilder()->expr()->eq('method', ':invoice')
                )
            )
            ->setParameters([
                'cash' => Payment::METHOD_CASH,
                'card' => Payment::METHOD_CARD,
                'invoice' => Payment::METHOD_INVOICE,
            ]);

        $this->addDates($qb);

        $this->selectPOS($qb);

        $qr = $qb->execute();

        $val = $qr->fetchColumn();

        $this->sum = $this->sum->add(toDecimal($val));

        return toDecimal($val);
    }

    public function getDiscounts()
    {
        $qb = $this->getQueryBuilder()
            ->select('DISTINCT (oi.id)')
            ->from('order_items', 'oi')
            ->leftJoin('oi', 'order_payments', 'op', 'oi.id_order = op.id_order');

        $this->addDates($qb);

        $this->selectPOS($qb);

        $qb2 = $this->getQueryBuilder()
            ->select('SUM(((oi2.total_price / (100) * (100 + oi2.tax)) / (100 - oi2.discount) * oi2.discount))')
            ->from('order_items', 'oi2')
            ->where(
                $this->getQueryBuilder()->expr()->in('oi2.id', $qb->getSQL())
            )
            ->setParameters($qb->getParameters());

        $qr = $qb2->execute();

        $val = $qr->fetchColumn();

        return toDecimal($val);
    }

    protected function selectPOS(&$qb)
    {
        if ($this->getSpecificPos()) {
            $qb->andWhere($this->getQueryBuilder()->expr()->eq('op.admin', $this->getSpecificPos()));
        }
    }

    protected function addDates(&$qb)
    {
        if ($this->getStartDatetime()) {
            $qb->andWhere('op.date > :start_datetime')
                ->setParameter('start_datetime', $this->getStartDatetime());
        }

        if ($this->getEndDatetime()) {
            $qb->andWhere('op.date < :end_datetime')
                ->setParameter('end_datetime', $this->getEndDatetime());
        }
    }

    public static function getMethodDescr($method_id)
    {
        return static::METHODS[$method_id];
    }

    /**
     * @param mixed $start_datetime In format %d-%m-%Y %H:%M:%S
     */
    public function setStartDatetime($start_datetime)
    {
        $this->start_datetime = $this->prepareDateTime($start_datetime);
    }

    /**
     * @param mixed $end_datetime In format %d-%m-%Y %H:%M:%S
     */
    public function setEndDatetime($end_datetime)
    {
        $this->end_datetime = $this->prepareDateTime($end_datetime);
    }

    public function getStartDatetime()
    {
        return $this->start_datetime;
    }

    public function getEndDatetime()
    {
        return $this->end_datetime;
    }

    public function getSpecificPos()
    {
        return $this->specific_pos;
    }

    /**
     * @param null $specific_pos
     */
    public function setSpecificPos($specific_pos)
    {
        $this->specific_pos = $specific_pos;
    }
}

if (empty($subclass)) {
    class Pos extends PosBase
    {
    }
}