<?php

namespace App\Blog;

class Obj extends AbstractObj
{
    public $maxFeedItemCount = 50;
    protected $_categoryAlias;
    protected $_category;
    protected $_date;
    protected $_tags;

    public function getFeedData()
    {
        $cache = self::_getCacheObject();

        if (!($feed = $cache->load('feedData'))) {

            $feed = array();
            $feed['title'] = SITE_NAME;
            $feed['link'] = BASE_URL_LANGUAGE . '/' . CURRENT_PAGE;
            $feed['published'] = gmdate('D, d M Y H:i:s');
            $feed['charset'] = 'utf-8';
            $feed['language'] = 'en-us';

            $maxItems = (int) $this->maxFeedItemCount;
            $list = $this->getList(array('order' => 'date DESC', 'limit' => $maxItems));
            foreach ($list as $item) {
                $feedItem = array(
                    'title'      => $item['title'],
                    'link'       => BASE_URL_LANGUAGE . '/' . CURRENT_PAGE_FINAL . '/'
                                  . ((empty($item['alias'])) ? $item['id'] : $item['alias']),
                    'lastUpdate' => strtotime($item['date'])
                );
                if (empty($item['excerpt'])) {
                    $feedItem['description'] = (empty($item['password']))
                                             ? $item['content']
                                             : '[Content protected with password]';
                } else {
                    $feedItem['description'] = htmlspecialchars($item['excerpt'])
                                             . ' <a href="' . $feedItem['link'] . '">[Read more]</a>';
                }
                $feed['entries'][] = $feedItem;
            }

            $cache->save($feed, 'feedData', array('blog', 'feedData'));
        }

        return $feed;
    }

    public function getAllTags()
    {
        $cache = self::_getCacheObject();

        if (!($tags = $cache->load('tags'))) {
            $countPosts = $this->_db->select();
            $countPosts->from($this->_getPair('Post2Tag', 'p2t'), array('count' => 'COUNT(`p2t`.`id`)'));
            $countPosts->join($this->_getPair(null, 'p'), '`p`.`id` = `p2t`.`idPost` AND `p`.`enabled` = "y"', array());
            $countPosts->join(
                $this->_getPair('PostCategory', 'pc'),
                '`pc`.`id` = `p`.`categoryId` AND `pc`.`enabled` = "y"',
                array()
            );
            $countPosts->where("t.id = p2t.idTag");

            $select = $this->_db->select();
            $select->from(
                $this->_getPair('PostTag', 't'),
                array('title' => 'value', 'count' => new \Zend_Db_Expr('(' . $countPosts . ')'))
            );
            $select->having('`count` > 0');
            $tags = $this->_db->fetchAll($select);

            $cache->save($tags, 'tags', array('blog', 'tags'));
        }

        return $tags;
    }

    public function getAllCategories()
    {
        $cache = self::_getCacheObject();

        if (!($categories = $cache->load('categories'))) {
            $countPosts = $this->_db->select();
            $countPosts->from($this->_getPair(),  'COUNT(id)');
            $countPosts->where("`{$this->_tableAlias}`.`enabled` = 'y'");
            $countPosts->where("`{$this->_tableAlias}`.`categoryId` = `c`.`id`");
            $countPosts->where("`{$this->_tableAlias}`.`date` <= CURDATE()");

            $select = $this->_db->select();
            $select->from(
                array('c' => $this->_getTableName('PostCategory')),
                array('id', 'title', 'alias', 'count' => new \Zend_Db_Expr('(' . $countPosts . ')'))
            );
            $select->where('`enabled` = "y"');
            $select->having('`count` > 0');
            $select->order('sorter');
            $categories = $this->_db->fetchAll($select);

            $cache->save($categories, 'categories', array('blog', 'categories'));
        }

        return $categories;
    }

    public function getAllMonths()
    {
        $countPosts = $this->_db->select();
        $countPosts->from(array('p' => $this->_getTableName()), array('COUNT(id)'));
        $countPosts->where("`p`.`enabled` = 'y'");
        $countPosts->where("`p`.`date` LIKE CONCAT(DATE_FORMAT(`Post`.`date`, '%Y-%m'), '%')");
        $countPosts->where('`p`.`date` <= CURDATE()');

        $select = $this->_db->select();
        $columns = array(
            'date',
            'full'  => "DATE_FORMAT(`date`, '%Y-%m')",
            'year'  => "YEAR(`date`)",
            'month' => "MONTH(`date`)",
            'count' => new \Zend_Db_Expr('(' . $countPosts . ')'),
        );

        $select->from($this->_getPair(), $columns);
        $select->join(
            $this->_getPair('PostCategory'),
            '`PostCategory`.`id` = `' . $this->_tableAlias . '`.`categoryId`',
            array()
        );
        $select->where('`' . $this->_tableAlias . '`.`enabled` = "y"');
        $select->where('`PostCategory`.`enabled` = "y"');
        $select->where('`date` <= CURDATE()');
        $select->group('full');
        $select->order('date DESC');
        $select->having('`count` > 0');

        // TODO: Limit count of posts in blog archive widget
        // $select->limit(50);

        return $this->_db->fetchAll($select);
    }

    public function buildMonthTree()
    {
        $cache = self::_getCacheObject();

        if (!($tree = $cache->load('monthTree'))) {
            $data = $this->getAllMonths();
            $tree = array('months' => array(), 'counts' => array());
            foreach ($data as $r) {
                $y = $r['year'];
                if (empty($tree['months'][$y])) {
                    $tree['months'][$y] = array();
                    $tree['counts'][$y] = 0;
                }
                $tree['months'][$y][] = $r;
                $tree['counts'][$y] += $r['count'];
            }

            $cache->save($tree, 'monthTree', array('blog', 'monthTree'));
        }

        if (empty($tree['months'])) {
            $tree = array();
        }

        return $tree;
    }

    public function getMonthPosts($year = null, $month = null)
    {
        if (null === $year) {
            if (!empty($this->_date)) {
                $dateParts = explode('-', $this->_date);
                $year = array_shift($dateParts);
            } else {
                $year = date('Y');
            }
        }

        if (null === $month) {
            if (!empty($this->_date)) {
                $dateParts = explode('-', $this->_date);
                array_shift($dateParts);
                if (!empty($dateParts)) {
                    $month = array_shift($dateParts);
                } else {
                    $month = date('m');
                }
            } else {
                $month = date('m');
            }
        }

        $fmtDate = sprintf('%s-%02s', $year, $month);

        $select = $this->_db->select();
        $select->from(
            $this->_getPair(),
            array('date' => "DATE_FORMAT(`" . $this->_tableAlias . "`.`date`, '%Y-%m-%d')", 'id')
        );
        $select->join(
            $this->_getPair('PostCategory'),
            '`PostCategory`.`id` = `' . $this->_tableAlias . '`.`categoryId`',
            array()
        );
        $select->where('`' . $this->_tableAlias . '`.`enabled` = "y"');
        $select->where('`PostCategory`.`enabled` = "y"');
        $select->where('`' . $this->_tableAlias . '`.`date` LIKE ?', $fmtDate . '%');
        $select->where('`' . $this->_tableAlias . '`.`date` <= CURDATE()');
        $select->group($this->_tableAlias . '.date');

        return $this->_db->fetchPairs($select);
    }

    public function getPostsDatesRange()
    {
        $select = $this->_db->select();
        $select->from($this->_getPair(), array('min' => "MIN(`date`)", 'max' => "MAX(`date`)"));
        $select->where('`date` <= CURDATE()');
        $range = $this->_db->fetchRow($select);

        if (!$range['min']) {
            $range = array();
        }

        return $range;
    }

    public function setCategoryAlias($alias)
    {
        $this->_categoryAlias = $alias;
        return $this;
    }

    public function setDate($date)
    {
        $this->_date = $date;
        return $this;
    }

    public function getDate()
    {
        return $this->_date;
    }

    public function setTags($tags)
    {
        $this->_tags = (array) $tags;
        return $this;
    }

    public function getTags()
    {
        return $this->_tags;
    }

    public function getCategoryId()
    {
        return $this->_category ? (int) $this->getCategory('id') : null;
    }

    public function getCategoryTitle()
    {
        return $this->_category ? (int) $this->getCategory('title') : null;
    }

    public function getCategory($field = null)
    {
        if (null === $this->_category && $this->_categoryAlias) {
            $select = $this->_db->select();
            $select->from($this->_getPair('PostCategory'), array('*'));
            $select->where('`alias` = ?', $this->_categoryAlias);
            $select->limit(1);
            $this->_category = $this->_db->fetchRow($select);
        }
        if ($this->_category) {
            if (null === $field) {
                return $this->_category;
            }
            return (array_key_exists($field, $this->_category)) ? $this->_category[$field] : null;
        }
        return null;
    }

    public function getListSelect()
    {
        if (null === $this->_select) {
            parent::getListSelect();

            $this->_select->where('`' . $this->_tableAlias . '`.`enabled` = "y"');
            $this->_select->where('`PostCategory`.`enabled` = "y"');

            if ($this->_tags) {
                $this->_select->join(
                    $this->_getPair('Post2Tag'),
                    "`Post2Tag`.`idPost` = `{$this->_tableAlias}`.`id`",
                    ''
                );
                $this->_select->join($this->_getPair('PostTag'), '`PostTag`.`id` = `Post2Tag`.`idTag`', '');
            }

            $this->_select->where("`{$this->_tableAlias}`.`date` <= ?", date('Y-m-d'));

            if ($this->_category) {
                $this->_select->where('`categoryId` = ?', $this->getCategoryId(), \Zend_Db::INT_TYPE);
            }

            if ($this->_date) {
                $this->_select->where('`date` LIKE ?', $this->_date . '%');
            }

            if ($this->_tags) {
                $this->_select->where('`PostTag`.`value` IN (?)', $this->_tags);
                $this->_select->group("{$this->_tableAlias}.id");
            }
        }
        return $this->_select;
    }

    protected function _getFromColumns()
    {
        $columns = parent::_getFromColumns();

        $commentsCount = $this->_db->select();
        $commentsCount->from($this->_getPair($this->_tableAlias . 'Comment'), array('COUNT(id)'));
        $commentsCount->where('`' . $this->_tableAlias . 'Comment`.`idPost` = `' . $this->_tableAlias . '`.`id`');
        $commentsCount->where('`' . $this->_tableAlias . 'Comment`.`status` = "approved"');
        $columns['countComments'] = new \Zend_Db_Expr('(' . $commentsCount . ')');

        return $columns;
    }

    public function initFromForm(array $data)
    {
        if (!empty($this->_userInfo)) {
            $data = array_merge((array) $this->_userInfo, $data);
        }

        $data['status'] = 'pending';

        return parent::initFromForm($data);
    }

    public function insert(array $data = null)
    {
        if (null === $data) {
            $data = $this->_data;
        } else {
            $this->_data = $data;
        }
        unset($data['id']);
        $this->_db->beginTransaction();
        $this->_clearErrors();
        try {
            $this->_primaryKey = $this->_getTable($this->_tableAlias . 'Comment')->insert($data);
            $this->_insertDependency();
            $this->_db->commit();
        } catch (\Exception $e) {
            $this->_deleteFiles($data);
            \Qs_Debug::log($e->getMessage(), 3);
            $this->_addError($e->getMessage());
            $this->_db->rollBack();
            return false;
        }
        $this->_handleFiles();
        return $this->_primaryKey;
    }

    protected function _addDependenciesFromDb(array &$data)
    {
        $category = $this->_getPostCategory($data['categoryId']);
        $data['categoryTitle'] = $category['title'];
        $data['categoryAlias'] = $category['alias'];
        $data['categoryEnabled'] = $category['enabled'];
        $data['tags'] = $this->_getPostTags();
        return $this;
    }

    /**
     * @param null|int $categoryId
     * @return array
     */
    protected function _getPostCategory($categoryId = null)
    {
        $select = $this->_db->select();
        $select->from($this->_getPair($this->_tableAlias . 'Category'));

        if (null !== $categoryId) {
            $select->where('`' . $this->_tableAlias . 'Category`.`id` = ?', $categoryId, \Zend_Db::INT_TYPE);
        } else {
            $select->join(
                $this->_getPair(),
                '`' . $this->_tableAlias . 'Category`.`id` = `' . $this->_tableAlias . '`.`categoryId`',
                ''
            );
            $select->where('`' . $this->_tableAlias . '`.`id` = ?',  $this->getPrimaryKey(), \Zend_Db::INT_TYPE);
        }

        return $this->_db->fetchRow($select);
    }

    protected function _getPostTags($postId = null)
    {
        if (null === $postId) {
            $postId = $this->getPrimaryKey();
        }

        $select = $this->_db->select();
        $select->from($this->_getPair($this->_tableAlias . '2Tag'), null);
        $select->where('`idPost` = ?', $postId, \Zend_Db::INT_TYPE);
        $select->joinLeft(
            $this->_getPair("PostTag"),
            '`' . $this->_tableAlias . '2Tag`.`idTag` = `PostTag`.`id`',
            array('id', 'value')
        );

        return $this->_db->fetchPairs($select);
    }

    protected function _getPostsTags(array $postsIds)
    {
        if (!is_array($postsIds) || empty($postsIds)) {
            return false;
        }

        $select = $this->_db->select();
        $select->from($this->_getPair($this->_tableAlias . '2Tag'), array('idPost', 'idTag'));
        $select->where('`idPost` IN (?)', $postsIds, \Zend_Db::INT_TYPE);
        $select->join(
            $this->_getPair("PostTag"),
            '`' . $this->_tableAlias . '2Tag`.`idTag` = `PostTag`.`id`',
            array('value')
        );

        $list = $this->_db->fetchAll($select);

        $data = array();
        foreach($list as $row) {
            $data[$row['idPost']][$row['idTag']] = $row['value'];
        }

        return $data;
    }

    protected function _prepareList(&$list)
    {
        parent::_prepareRow($list);
        if (!empty($list)) {
            $postsIds = \Qs_Array::fetchCol($list, 'id');
            $tags = $this->_getPostsTags($postsIds);
            foreach ($list as &$row) {
                $row['tags'] = array();
                if (array_key_exists($row['id'], $tags)) {
                    $row['tags'] = $tags[$row['id']];
                }
            }
            unset($row);
        }
        return $this;
    }

    public function getListStatement4XmlSitemap($columns = null, $options = array())
    {
        if (null === $columns) {
            $aliasField = $this->_db->quoteIdentifier($this->_tableAlias . '.alias');
            $idField = $this->_db->quoteIdentifier($this->_tableAlias . '.id');
            $columns = array('alias' => "IFNULL({$aliasField}, {$idField})");
        }
        return parent::getListStatement4XmlSitemap($columns, $options);
    }
}