<?php

namespace App\Blog\Tag\Admin;

class Obj extends \Qs_Db_Obj
{
    protected $_tableAlias = 'Post2Tag';
    protected $_idPost;

    public function setIdPost($id)
    {
        $this->_idPost = $id;
        return $this;
    }

    public function getIdPost()
    {
        return $this->_idPost;
    }

    public function getPostTitle()
    {
        if (!($id = $this->getIdPost())) {
            return false;
        }

        $select = $this->_db->select();
        $select->from($this->_getTableName('Post'), array('title'));
        $select->where('id = ?', $id, \Zend_Db::INT_TYPE);
        $select->limit(1);

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

    public function getListSelect()
    {
        if (null === $this->_select) {
            parent::getListSelect();
            $this->_select->where('`' . $this->_tableAlias . '`.`idPost` = ?', $this->getIdPost(), \Zend_Db::INT_TYPE);
            $this->_joinFromDb($this->_select);
        }
        return $this->_select;
    }

    protected function _getFromDbSelect($primaryKey)
    {
        $select = parent::_getFromDbSelect($primaryKey);
        $this->_joinFromDb($select);
        return $select;
    }

    protected function _joinFromDb(\Zend_Db_Select $select)
    {
        $select->joinLeft($this->_getPair('PostTag'), "`{$this->_tableAlias}`.`idTag` = `PostTag`.`id`", 'value');
        return $this;
    }

    public function insert(array $data = null)
    {
        if (null === $data) {
            $data = $this->_data;
        } else {
            $this->_data = $data;
        }
        unset($data['id']);
        $this->_saveTag($data['value']);
        $this->_cleanCache();
        return $this->_primaryKey;
    }

    protected function _saveTag($value, $mode = 'insert')
    {
        $this->_db->beginTransaction();
        try {
            if ($mode == 'update' && $this->_primaryKey) {
                $this->_getTable()->deleteByKey($this->_primaryKey);
            }
            if (($id = $this->getTagId($value))) {
                $this->_primaryKey = $this->_insertTagLink($id);
            } else {
                $id = $this->_insertTag($value);
                $this->_primaryKey = $this->_insertTagLink($id);
            }
            $this->_deleteUnusedTags();
            $this->_db->commit();
        } catch (\Exception $e) {
            $this->_db->rollBack();
            false;
        }
        return $this->_primaryKey;
    }

    public function update(array $data = null)
    {
        if (null === $data) {
            $data = $this->_data;
        } else {
            $this->_data = $data;
        }
        unset($data['id']);
        $this->_saveTag($data['value'], 'update');
        $this->_cleanCache();
        return $this->_primaryKey;
    }

    protected function _deletePostTagLinks()
    {
        if (($idPost = $this->getIdPost())) {
            $this->_getTable()->delete($this->_db->quoteInto('`idPost` = ?', $idPost, \Zend_Db::INT_TYPE));
            return true;
        }
        return false;
    }

    public function getTagId($value, $idPost = null, $skipCurrent = false)
    {
        $select = $this->_db->select();
        $select->from($this->_getPair('PostTag'), 'id');
        $select->where('`PostTag`.`value` = ?', $value);
        if ($idPost) {
            $idPost = (is_bool($idPost)) ? $this->getIdPost() : $idPost;
            $select->joinLeft($this->_getPair('Post2Tag'), '`PostTag`.`id` = `Post2Tag`.`idTag`', null);
            $select->where('`Post2Tag`.`idPost` = ?', $idPost, \Zend_Db::INT_TYPE);
            if ($skipCurrent && $this->_primaryKey) {
                $select->where('`Post2Tag`.`id` <> ?', $this->_primaryKey, \Zend_Db::INT_TYPE);
            }
        }
        $select->limit(1);

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

    protected function _insertTagLink($id)
    {
        if (!($idPost = $this->getIdPost())) {
            throw new \Exception('Can not get idPost');
        }
        return $this->_getTable()->insert(array('idPost' => $idPost, 'idTag' => $id));
    }

    protected function _insertTag($value)
    {
        return $this->_getTable('PostTag')->insert(array('value' => $value));
    }

    protected function _deleteUnusedTags()
    {
        $sql = 'DELETE `PostTag` '
             . 'FROM `' . $this->_getTableName('PostTag') . '` AS `PostTag` '
             . 'LEFT JOIN `' . $this->_getTableName($this->_tableAlias) . '` AS `' . $this->_tableAlias . '` '
             . '    ON `PostTag`.`id` = `' . $this->_tableAlias . '`.`idTag` '
             . 'WHERE `PostTag`.`id` IS NULL';

        return $this->_db->query($sql);
    }

    public function delete()
    {
        $this->_getTable()->deleteByKey($this->_primaryKey);
        $this->_deleteUnusedTags();
        $this->_cleanCache();
        return $this;
    }

    public function getAutocompleteList($query, $limit = 10)
    {
        $query = (string) $query;

        $limit = (int) $limit;
        $limit = (!$limit) ? 10 : $limit;

        $select = $this->_db->select();
        $select->from($this->_getPair('PostTag'), array('value'));
        $select->where('`PostTag`.`value` LIKE ?', '%' . $query . '%');
        $select->limit($limit);

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

    protected function _cleanCache()
    {
        \App\Blog\Admin\Obj::cleanCache();
        return $this;
    }

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