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<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Sales\Model\ResourceModel\Sale;

use Magento\Framework\Data\Collection\EntityFactory;
use Magento\Store\Model\StoreManagerInterface;
use Magento\Framework\Data\Collection\Db\FetchStrategyInterface;
use Magento\Framework\Event\ManagerInterface;
use Psr\Log\LoggerInterface as Logger;

/**
 * Sales Collection
 */
class Collection extends \Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection
{
    /**
     * Totals data
     *
     * @var array
     */
    protected $_totals = ['lifetime' => 0, 'base_lifetime' => 0, 'base_avgsale' => 0, 'num_orders' => 0];

    /**
     * Customer Id
     *
     * @var int
     */
    protected $_customerId;

    /**
     * Order state value
     *
     * @var null|string|array
     */
    protected $_state = null;

    /**
     * Order state condition
     *
     * @var string
     */
    protected $_orderStateCondition = null;

    /**
     * @var \Magento\Store\Model\ResourceModel\Store\CollectionFactory
     */
    protected $_storeCollectionFactory;

    /**
     * @var StoreManagerInterface
     */
    protected $_storeManager;

    /**
     * @param EntityFactory $entityFactory
     * @param Logger $logger
     * @param FetchStrategyInterface $fetchStrategy
     * @param ManagerInterface $eventManager
     * @param \Magento\Store\Model\ResourceModel\Store\CollectionFactory $storeCollectionFactory
     * @param StoreManagerInterface $storeManager
     */
    public function __construct(
        EntityFactory $entityFactory,
        Logger $logger,
        FetchStrategyInterface $fetchStrategy,
        ManagerInterface $eventManager,
        \Magento\Store\Model\ResourceModel\Store\CollectionFactory $storeCollectionFactory,
        StoreManagerInterface $storeManager
    ) {
        $this->_storeCollectionFactory = $storeCollectionFactory;
        $this->_storeManager = $storeManager;
        parent::__construct(
            $entityFactory,
            $logger,
            $fetchStrategy,
            $eventManager
        );
    }

    /**
     * {@inheritdoc}
     */
    protected function _construct()
    {
        parent::_construct();
        $this->_init(\Magento\Sales\Model\Order::class, \Magento\Sales\Model\ResourceModel\Order::class);
    }

    /**
     * Set filter by customer Id
     *
     * @param int $customerId
     * @return $this
     */
    public function setCustomerIdFilter($customerId)
    {
        $this->_customerId = (int)$customerId;
        return $this;
    }

    /**
     * Add filter by stores
     *
     * @param array $storeIds
     * @return $this
     */
    public function addStoreFilter($storeIds)
    {
        return $this->addFieldToFilter('store_id', ['in' => $storeIds]);
    }

    /**
     * Set filter by order state
     *
     * @param string|array $state
     * @param bool $exclude
     * @return $this
     */
    public function setOrderStateFilter($state, $exclude = false)
    {
        $this->_orderStateCondition = $exclude ? 'NOT IN' : 'IN';
        $this->_state = !is_array($state) ? [$state] : $state;
        return $this;
    }

    /**
     * Before load action
     *
     * @return $this
     */
    protected function _beforeLoad()
    {
        $this->getSelect()
            ->columns(
                [
                    'store_id',
                    'lifetime' => new \Zend_Db_Expr('SUM(base_grand_total)'),
                    'base_lifetime' => new \Zend_Db_Expr('SUM(base_grand_total * base_to_global_rate)'),
                    'avgsale' => new \Zend_Db_Expr('AVG(base_grand_total)'),
                    'base_avgsale' => new \Zend_Db_Expr('AVG(base_grand_total * base_to_global_rate)'),
                    'num_orders' => new \Zend_Db_Expr('COUNT(base_grand_total)')
                ]
            )
            ->group('store_id');

        if ($this->_customerId) {
            $this->addFieldToFilter('customer_id', $this->_customerId);
        }

        if ($this->_state !== null) {
            $condition = '';
            switch ($this->_orderStateCondition) {
                case 'IN':
                    $condition = 'in';
                    break;
                case 'NOT IN':
                    $condition = 'nin';
                    break;
            }
            $this->addFieldToFilter('state', [$condition => $this->_state]);
        }

        $this->_eventManager->dispatch('sales_sale_collection_query_before', ['collection' => $this]);
        return $this;
    }

    /**
     * Load data
     *
     * @param bool $printQuery
     * @param bool $logQuery
     * @return $this
     */
    public function load($printQuery = false, $logQuery = false)
    {
        if ($this->isLoaded()) {
            return $this;
        }

        $this->_beforeLoad();

        $this->_renderFilters()->_renderOrders()->_renderLimit();

        $this->printLogQuery($printQuery, $logQuery);

        $data = $this->getData();
        $this->resetData();

        $stores = $this->_storeCollectionFactory->create()->setWithoutDefaultFilter()->load()->toOptionHash();
        $this->_items = [];
        foreach ($data as $v) {
            $storeObject = new \Magento\Framework\DataObject($v);
            $storeId = $v['store_id'];
            $storeName = isset($stores[$storeId]) ? $stores[$storeId] : null;
            $storeObject->setStoreName(
                $storeName
            )->setWebsiteId(
                $this->_storeManager->getStore($storeId)->getWebsiteId()
            )->setAvgNormalized(
                $v['avgsale'] * $v['num_orders']
            );
            $this->_items[$storeId] = $storeObject;
            foreach (array_keys($this->_totals) as $key) {
                $this->_totals[$key] += $storeObject->getData($key);
            }
        }

        if ($this->_totals['num_orders']) {
            $this->_totals['avgsale'] = $this->_totals['base_lifetime'] / $this->_totals['num_orders'];
        }

        $this->_setIsLoaded();
        $this->_afterLoad();
        return $this;
    }

    /**
     * Retrieve totals data converted into \Magento\Framework\DataObject
     *
     * @return \Magento\Framework\DataObject
     */
    public function getTotals()
    {
        return new \Magento\Framework\DataObject($this->_totals);
    }
}