<?php
class Question
{
    public $id;
    public $id_question;
    public $id_section;
    public $status = 0;
    public $position;
    public $title = array();
    public $answer = array();
    public $versions = array();

    protected $fieldsRequired = array('id_section', 'answer');
    
    public function __construct($id=NULL)
    {
        if($id !== NULL) {
            $question = Question::getQuestion($id);
            if($question) {
                $this->id          = $id;
                $this->id_question = $question['id_question'];
                $this->id_section  = $question['id_section'];
                $this->status      = $question['status'];
                $this->position    = $question['position'];
                $this->title       = $question['title'];
                $this->answer      = $question['answer'];
                /*$this->versions = $question['versions'];*/
            }
        }
    }

    public static function getQuestion($id) {
        if(!($q = Db::getInstance()->ExecuteS('
            SELECT *
            FROM `'._DB_PREFIX_.'support_question`
            WHERE `id_question` = '.(int) $id
        )) || count($q) == 0) {
            return false;
        }

        $result = array(
            'id_question' => $q[0]['id_question'],
            'id_section'  => $q[0]['id_section'],
            'status'      => $q[0]['status'],
            'position'    => $q[0]['position'],
            'title'       => array(),
            'answer'      => array(),
        );

        $ql = Db::getInstance()->ExecuteS('
            SELECT *
            FROM `'._DB_PREFIX_.'support_question_lang`
            WHERE `id_question` = '.(int) $id
        );
        foreach($ql as $l) {
            $result['answer'][$l['id_lang']] = $l['answer'];
            $result['title'][$l['id_lang']] = $l['title'];
        }

        /*foreach(Db::getInstance()->ExecuteS('
            SELECT `version`
            FROM `'._DB_PREFIX_.'support_section_site_version`
            WHERE `id_section` = '.(int) $id
        ) as $version) {
            $result['versions'][] = $version['version'];
        }*/

        return $result;
    }

    public static function getQuestionsByIdSection($id) {
        if(!($questions = Db::getInstance()->ExecuteS('
            SELECT *
            FROM `'._DB_PREFIX_.'support_question`
            WHERE `id_section` = '.(int) $id.'
            ORDER BY `position`'
        )) || count($questions) == 0) {
            return false;
        }

        $result = array();
        foreach($questions AS $question) {
            $result[] = new Question($question['id_question']);
        }
        return $result;

        /*$result = array();
        $ids = array();
        foreach ($questions as $q) {
            $result[$q['id_question']] = array(
                'id_question' => $q['id_question'],
                'id_section' => $q['id_section'],
                'status' => $q['status'],
                'position' => $q['position'],
                'title' => array(),
                'answer' => array(),
            );
            $ids[] = $q['id_question'];
        }

        $ql = Db::getInstance()->ExecuteS('
            SELECT *
            FROM `'._DB_PREFIX_.'support_question_lang`
            WHERE `id_question` IN ('.implode(',', $ids).')'
        );
        foreach($ql as $l) {
            $result[$l['id_question']]['answer'][$l['id_lang']] = $l['answer'];
            $result[$l['id_question']]['title'][$l['id_lang']] = $l['title'];
        }*/

        return $result;
    }

     public static function getQuestionIdsByIdSection($id) {
        if(!($questions = Db::getInstance()->ExecuteS('
            SELECT `id_question`
            FROM `'._DB_PREFIX_.'support_question`
            WHERE `id_section` = '.(int) $id
        )) || count($questions) == 0) {
            return false;
        } else {
            return $questions;
        }
     }

    public function save() {
        if($this->id !== null) {
            Db::getInstance()->Execute('
                UPDATE `'._DB_PREFIX_.'support_question` SET
                    `status` = '.(int) $this->status.',
                    `id_section` = '.(int) $this->id_section.',
                    `position` = '.(int) $this->position.'
                WHERE `id_question` = '.(int) $this->id.'
            ');

            Db::getInstance()->Execute('DELETE FROM `'._DB_PREFIX_.'support_question_lang` WHERE `id_question` = '.(int) $this->id);
            $question_i18n = array();
            foreach($this->title as $k => $v) {
                if(!isset($question_i18n[$k])) {
                    $question_i18n[$k] = array();
                }
                $question_i18n[$k]['title'] = $v;
            }
            foreach($this->answer as $k => $v) {
                if(!isset($question_i18n[$k])) {
                    $question_i18n[$k] = array();
                }
                $question_i18n[$k]['answer'] = $v;
            }
            foreach($question_i18n as $lang => $values) {
                Db::getInstance()->Execute('
                    INSERT INTO `'._DB_PREFIX_.'support_question_lang` VALUES (
                        '.$this->id.',
                        '.$lang.',
                        "'.(isset($values['title'])? pSQL($values['title']): '').'",
                        "'.(isset($values['answer'])? pSQL($values['answer'], true): '').'"
                    )
                ');
            }

        } else {

            $sql_position = 'SELECT MAX(position) FROM '. _DB_PREFIX_.'support_question WHERE `id_section`='.(int) $this->id_section;
            $position = Db::getInstance()->getValue($sql_position);

            Db::getInstance()->Execute('
                INSERT INTO `'._DB_PREFIX_.'support_question` VALUES (
                    DEFAULT,
                    '.(int) $this->id_section.',
                    '.(int) $this->status.',
                    '.($position+1).'
                )
            ');
            $this->id = Db::getInstance()->Insert_ID();

            Db::getInstance()->Execute('DELETE FROM `'._DB_PREFIX_.'support_question_lang` WHERE `id_question` = '.(int) $this->id);
            $question_i18n = array();
            foreach($this->title as $k => $v) {
                if(!isset($question_i18n[$k])) {
                    $question_i18n[$k] = array();
                }
                $question_i18n[$k]['title'] = $v;
            }
            foreach($this->answer as $k => $v) {
                if(!isset($question_i18n[$k])) {
                    $question_i18n[$k] = array();
                }
                $question_i18n[$k]['answer'] = $v;
            }
            foreach($question_i18n as $lang => $values) {
                Db::getInstance()->Execute('
                    INSERT INTO `'._DB_PREFIX_.'support_question_lang` VALUES (
                        '.$this->id.',
                        '.$lang.',
                        "'.(isset($values['title'])? pSQL($values['title']): '').'",
                        "'.(isset($values['answer'])? pSQL($values['answer'], true): '').'"
                    )
                ');
            }
        }
    }

    public static function deleteQuestion($id) {
        if($question = Question::getQuestion($id)) {
            Db::getInstance()->Execute('DELETE FROM `'._DB_PREFIX_.'support_question_lang` WHERE `id_question` = '.(int) $id);
            Db::getInstance()->Execute('DELETE FROM `'._DB_PREFIX_.'support_question` WHERE `id_question` = '.(int) $id);
        }
    }
}