<?php

class App_Faq_Obj extends App_Faq_Abstract_Obj
{
    /** @var array */
    protected $_notEmptyCategories;

    protected $_categoryId;

    /** @var array */
    protected $_categoryData;

    public function getListSelect()
    {
        if (null == $this->_select) {
            $this->_select = parent::getListSelect();
            $this->_select->where('`' . $this->_tableAlias . '`.`enabled` = "y"');
            Qs_Db::filter($this->_select, ['categoryId' => $this->_categoryId], $this->_tableAlias);
            $this->_select->order('sorter ASC');
        }
        return $this->_select;
    }

    public function getNotEmptyCategoryAlias()
    {
        $categories = $this->getNotEmptyCategories();
        if (!empty($categories)) {
            reset($categories);
            return key($categories);
        }
        return null;
    }

    public function getNotEmptyCategories()
    {
        if (null === $this->_notEmptyCategories) {
            $select = $this->_db->select();
            $select->from($this->_getPair('FaqCategory'), array('alias', 'title'));
            $select->where('`FaqCategory`.`enabled` = "y"');
            $select->where(new Zend_Db_Expr('(' . $this->_getSelectCountCategoryFaqs() . ') > 0'));
            $select->order('FaqCategory.sorter');
            $this->_notEmptyCategories = $this->_db->fetchPairs($select);

            $select = $this->_db->select();
            $select->from($this->_getPair(), array('COUNT(*)'))->where('`categoryId` IS NULL');
            $select->where('`' . $this->_tableAlias . '`.`enabled` = "y"');
            if (0 != $this->_db->fetchOne($select)) {
                $this->_notEmptyCategories = array(self::NO_CATEGORY_ALIAS => self::NO_CATEGORY_TITLE)
                                           + $this->_notEmptyCategories;
            }
        }
        return $this->_notEmptyCategories;
    }

    protected function _getSelectCountCategoryFaqs($alias = 'FaqCategory')
    {
        $select = $this->_db->select();
        $select->from($this->_getPair(), 'COUNT(*)');
        $select->where('`' . $this->_tableAlias . "`.`categoryId` = `{$alias}`.`id`");
        $select->where('`' . $this->_tableAlias . '`.`enabled` = "y"');
        return $select;
    }

    /**
     * @param int $categoryId
     * @return int
     */
    public function getCountCategoryFaqs($categoryId)
    {
        $select = $this->_db->select();
        $select->from($this->_getPair(), 'COUNT(*)');
        $select->where('`' . $this->_tableAlias . '`.`enabled` = "y"');
        $select->where('`' . $this->_tableAlias . '`.`categoryId` = ?', (string) $categoryId, Qs_Db::INT_TYPE);

        return (int) $this->_db->fetchOne($select);
    }

    /**
     * @param array $key
     * @param string $field Optional. Default null
     * @internal param int $categoryId
     * @return mixed
     */
    public function getCategoryData(array $key, $field = null)
    {
        if (null === $this->_categoryData) {
            $row = $this->_getTable('FaqCategory')->searchBy($key);
            if ($row && 'y' == $row['enabled']) {
                $this->_categoryData = $row;
                $this->_categoryData['faqCount'] = $this->getCountCategoryFaqs($row['id']);
            } else {
                return false;
            }
        }
        return Qs_Array::get($this->_categoryData, $field, false);
    }

    public function setCategoryId($categoryId)
    {
        $this->_categoryId = $categoryId;
        return $this;
    }

    public function getObjectInfo()
    {
        if (($info = parent::getObjectInfo())) {
            $info['itemTitle'] = $info['question'];
        }

        if ($this->_categoryId) {
            $info['categoryTitle'] = $this->getCategoryData(['id' => $this->_categoryId], 'title');
        } else {
            $info['categoryTitle'] = static::NO_CATEGORY_TITLE;
        }

        if (false === strpos($info['categoryTitle'], 'Category')) {
            $info['categoryTitle'] .= ' Category';
        }

        return $info;
    }

    public function getListStatement4XmlSitemap($columns = array('alias'))
    {
        $select = $this->_db->select();
        $select->from($this->_getPair('FaqCategory', 'fc'), $columns);
        $select->where('`fc`.`enabled` = "y"');
        $select->where(new Zend_Db_Expr('(' . $this->_getSelectCountCategoryFaqs('fc') . ') > 0'));
        $select->order('fc.sorter');
        return $select->query();
    }
}