<?php

    /**
     * The Legend of Z
     *
     * @author      Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
     * @copyright   2014 Heinrich-Heine-Universität Düsseldorf
     * @license     http://www.gnu.org/licenses/gpl.html
     * @link        https://bitbucket.org/coderkun/the-legend-of-z
     */

    namespace hhu\z\questtypes;


    /**
     * Model of the DragndropQuesttypeAgent for Drag&Drop.
     *
     * @author  Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
     */
    class DragndropQuesttypeModel extends \hhu\z\models\QuesttypeModel
    {
        /**
         * Required models
         *
         * @var array
         */
        public $models = array('media');


        /**
         * Copy a Quest
         *
         * @param   int $userId             ID of creating user
         * @param   int $sourceQuestId      ID of Quest to copy from
         * @param   int $targetQuestId      ID of Quest to copy to
         * @param   int $seminaryMediaIds   Mapping of SeminaryMedia-IDs from source Seminary to targetSeminary
         */
        public function copyQuest($userId, $sourceQuestId, $targetQuestId, $seminaryMediaIds)
        {
            // Check Seminary media
            if(is_null($seminaryMediaIds)) {
                return;
            }

            // Get Dragndrop
            $dragndrop = $this->getDragndrop($sourceQuestId);

            // Copy media
            $this->Media->copyQuestsmedia($userId, $seminaryMediaIds[$dragndrop['questmedia_id']]);

            // Copy dran&drop
            $this->db->query(
                'INSERT INTO questtypes_dragndrop '.
                '(quest_id, created_user_id, questmedia_id, width, height) '.
                'SELECT ?, ?, ?, width, height '.
                'FROM questtypes_dragndrop '.
                'WHERE quest_id = ?',
                'iiii',
                $targetQuestId, $userId, $seminaryMediaIds[$dragndrop['questmedia_id']],
                $sourceQuestId
            );

            // Copy drags
            $dragIds = array();
            $drags = $this->getDrags($sourceQuestId);
            foreach($drags as &$drag)
            {
                // Copy media
                $this->Media->copyQuestsmedia($userId, $seminaryMediaIds[$drag['questmedia_id']]);

                // Copy drag
                $this->db->query(
                    'INSERT INTO questtypes_dragndrop_drags '.
                    '(questtypes_dragndrop_id, questmedia_id) '.
                    'SELECT ?, ? '.
                    'FROM questtypes_dragndrop_drags '.
                    'WHERE id = ?',
                    'iii',
                    $targetQuestId, $seminaryMediaIds[$drag['questmedia_id']],
                    $drag['id']
                );
                $dragIds[$drag['id']] = $this->db->getInsertId();
            }

            // Copy drops
            $dropIds = array();
            $drops = $this->getDrops($sourceQuestId);
            foreach($drops as &$drop)
            {
                // Copy drop
                $this->db->query(
                    'INSERT INTO questtypes_dragndrop_drops '.
                    '(questtypes_dragndrop_id, top, `left`, width, height) '.
                    'SELECT ?, top, `left`, width, height '.
                    'FROM questtypes_dragndrop_drops '.
                    'WHERE id = ?',
                    'ii',
                    $targetQuestId,
                    $drop['id']
                );
                $dropIds[$drop['id']] = $this->db->getInsertId();

                // Link drags and drops
                $links = $this->db->query(
                    'SELECT questtypes_dragndrop_drag_id '.
                    'FROM questtypes_dragndrop_drops_drags '.
                    'WHERE questtypes_dragndrop_drop_id = ?',
                    'i',
                    $drop['id']
                );
                foreach($links as $link)
                {
                    $this->db->query(
                        'INSERT INTO questtypes_dragndrop_drops_drags '.
                        '(questtypes_dragndrop_drop_id, questtypes_dragndrop_drag_id, created_user_id) '.
                        'VALUES '.
                        '(?, ?, ?)',
                        'iii',
                        $dropIds[$drop['id']],
                        $dragIds[$link['questtypes_dragndrop_drag_id']],
                        $userId
                    );
                }
            }
        }


        /**
         * Create a new Drag&Drop field for a Quest.
         *
         * @param   int $userId         ID of creating user
         * @param   int $questId        ID of Quest to create Drag&Drop field for
         * @param   int $questmediaId   ID of Questmedia to use for the field
         */
        public function createDragndrop($userId, $questId, $questmediaId)
        {
            // Get image measurements
            $infos = $this->Media->getSeminarymediaInfos($questmediaId);

            // Create field
            $this->db->query(
                'INSERT INTO questtypes_dragndrop '.
                '(quest_id, created_user_id, questmedia_id, width, height) '.
                'VALUES '.
                '(?, ?, ?, ?, ?) '.
                'ON DUPLICATE KEY UPDATE '.
                'questmedia_id = ?, width = ?, height = ?',
                'iiiiiiii',
                $questId, $userId, $questmediaId, $infos['width'], $infos['height'],
                $questmediaId, $infos['width'], $infos['height']
            );
        }


        /**
         * Get Drag&Drop-field.
         *
         * @param   int $questId    ID of Quest
         * @return  array           Drag&Drop-field
         */
        public function getDragndrop($questId)
        {
            $data = $this->db->query(
                'SELECT quest_id, questmedia_id, width, height '.
                'FROM questtypes_dragndrop '.
                'WHERE quest_id = ?',
                'i',
                $questId
            );
            if(!empty($data)) {
                return $data[0];
            }


            return null;
        }


        /**
         * Get Drop-items.
         *
         * @param   int $dragndropId    ID of Drag&Drop-field
         * @return  array           Drop-items
         */
        public function getDrops($dragndropId)
        {
            return $this->db->query(
                'SELECT id, top, `left`, width, height '.
                'FROM questtypes_dragndrop_drops '.
                'WHERE questtypes_dragndrop_id = ?',
                'i',
                $dragndropId
            );
        }


        /**
         * Get Drop-items for a Drag-item
         *
         * @param   int     $dragId ID of Drag-item to get Drop-items for
         * @return  array           List of Drop-items
         */
        public function getDropsForDrag($dragId)
        {
            return $this->db->query(
                'SELECT drops.id, top, `left`, width, height '.
                'FROM questtypes_dragndrop_drops_drags AS drops_drags '.
                'INNER JOIN questtypes_dragndrop_drops AS drops ON drops.id = drops_drags.questtypes_dragndrop_drop_id '.
                'WHERE drops_drags.questtypes_dragndrop_drag_id = ?',
                'i',
                $dragId
            );
        }


        /**
         * Set correct Drop-items for a Drag-item.
         *
         * @param   int     $userId     ID of creating user
         * @param   int     $dragId     ID of Drag-item to set Drop-items for
         * @param   array   $dropIds    List of Drop-items to set for Drag-item
         */
        public function setDropsForDrag($userId, $dragId, $dropIds)
        {
            // Set new Drop-items
            if(!empty($dropIds))
            {
                $this->db->query(
                    sprintf(
                        'INSERT INTO questtypes_dragndrop_drops_drags '.
                        '(questtypes_dragndrop_drop_id, questtypes_dragndrop_drag_id, created_user_id) '.
                        'SELECT questtypes_dragndrop_drops.id, ?, ? '.
                        'FROM questtypes_dragndrop_drops '.
                        'WHERE questtypes_dragndrop_drops.questtypes_dragndrop_id = ('.
                            'SELECT questtypes_dragndrop_drags.questtypes_dragndrop_id '.
                            'FROM questtypes_dragndrop_drags '.
                            'WHERE questtypes_dragndrop_drags.id = ?'.
                        ') AND questtypes_dragndrop_drops.id IN (%s) '.
                        'ON DUPLICATE KEY UPDATE '.
                        'questtypes_dragndrop_drops_drags.created = questtypes_dragndrop_drops_drags.created',
                        implode(',', array_map(function($id) { return intval($id); }, $dropIds))
                    ),
                    'iii',
                    $dragId, $userId,
                    $dragId
                );

                // Remove old Drop-items
                $this->db->query(
                    sprintf(
                        'DELETE FROM questtypes_dragndrop_drops_drags '.
                        'WHERE questtypes_dragndrop_drag_id = ? AND questtypes_dragndrop_drop_id NOT IN (%s)',
                        implode(',', array_map(function($id) { return intval($id); }, $dropIds))
                    ),
                    'i',
                    $dragId
                );
            }
            else
            {
                // Remove all Drop-items
                $this->db->query(
                    'DELETE FROM questtypes_dragndrop_drops_drags '.
                    'WHERE questtypes_dragndrop_drag_id = ?',
                    'i',
                    $dragId
                );
            }
        }


        /**
         * Create a new Drop-item for a Drag&Drop-field.
         *
         * @param   int $dragndropId    ID of Drag&Drop-field to create Drop-item for
         * @param   int $width          Width of Drop-item
         * @param   int $height         Height of Drop-item
         * @param   int $x              X-coordinate of Drop-item
         * @param   int $y              Y-coordinate of Drop-item
         * @return  int                 ID of newly created Drop-item
         */
        public function addDrop($dragndropId, $width, $height, $x, $y)
        {
            $this->db->query(
                'INSERT INTO questtypes_dragndrop_drops '.
                '(questtypes_dragndrop_id, top, `left`, width, height) '.
                'VALUES '.
                '(?, ?, ?, ?, ?)',
                'iiiii',
                $dragndropId, $y, $x, $width, $height
            );

            return $this->db->getInsertId();
        }


        /**
         * Edit Drop-item.
         *
         * @param   int $dropId ID of Drop-item to edit
         * @param   int $width  New width of Drop-item
         * @param   int $height New height of Drop-item
         * @param   int $x      New X-coordinate of Drop-item
         * @param   int $y      New Y-coordinate of Drop-item
         */
        public function editDrop($dropId, $width, $height, $x, $y)
        {
            $this->db->query(
                'UPDATE questtypes_dragndrop_drops '.
                'SET top = ?, `left` = ?, width = ?, height = ? '.
                'WHERE id = ?',
                'iiiii',
                $y, $x, $width, $height,
                $dropId
            );
        }


        /**
         * Delete a Drop-item.
         *
         * @param   int $dropId ID of Drop-item to delete
         */
        public function deleteDrop($dropId)
        {
            $this->db->query(
                'DELETE FROM questtypes_dragndrop_drops '.
                'WHERE id = ?',
                'i',
                $dropId
            );
        }


        /**
         * Get Drag-items.
         *
         * @param   int $dragndropId    ID of Drag&Drop-field
         * @param   boolean $onlyUsed   Only Drag-items that are used for a Drop-item
         * @return  array           Drag-items
         */
        public function getDrags($dragndropId, $onlyUsed=false)
        {
            return $this->db->query(
                'SELECT id, questmedia_id '.
                'FROM questtypes_dragndrop_drags '.
                'WHERE questtypes_dragndrop_id = ?'.
                ($onlyUsed
                    ? ' AND EXISTS ('.
                        'SELECT questtypes_dragndrop_drag_id '.
                        'FROM questtypes_dragndrop_drops_drags '.
                        'WHERE questtypes_dragndrop_drag_id = questtypes_dragndrop_drags.id'.
                    ')'
                    : null
                ),
                'i',
                $dragndropId
            );
        }


        /**
         * Create a new Drag-item.
         *
         * @param   int $dragndropId    ID of Drag&Drop-field to add Drag-item for
         * @param   int $questmediaId   ID of Questmedia to use for this Drag-item
         * @return  int                 ID of newly created Drag-item
         */
        public function addDrag($dragndropId, $questmediaId)
        {
            $this->db->query(
                'INSERT INTO questtypes_dragndrop_drags '.
                '(questtypes_dragndrop_id, questmedia_id) '.
                'VALUES '.
                '(?, ?) ',
                'ii',
                $dragndropId, $questmediaId
            );

            return $this->db->getInsertId();
        }


        /**
         * Edit Drag-item.
         *
         * @param   int $dragId         ID of Drag-item to edit
         * @param   int $questmediaId   ID of new Questmedia to use for this Drag-item
         */
        public function editDrag($dragId, $questmediaId)
        {
            $this->db->query(
                'UPDATE questtypes_dragndrop_drags '.
                'SET questmedia_id = ? '.
                'WHERE id = ?',
                'ii',
                $questmediaId,
                $dragId
            );
        }


        /**
         * Delete a Drag-item.
         *
         * @param   int $dragId         ID of Drag-item to delete
         */
        public function deleteDrag($dragId)
        {
            $this->db->query(
                'DELETE FROM questtypes_dragndrop_drags '.
                'WHERE id = ?',
                'i',
                $dragId
            );
        }


        /**
         * Check if a Drag-item mathes a Drop-item.
         *
         * @param   int $dragId ID of Drag-field
         * @param   int $dropId ID of Drop-field
         * @return  boolean Drag-item is valid for Drop-item
         */
        public function dragMatchesDrop($dragId, $dropId)
        {
            $data = $this->db->query(
                'SELECT count(*) AS c '.
                'FROM questtypes_dragndrop_drops_drags '.
                'WHERE questtypes_dragndrop_drop_id = ? AND questtypes_dragndrop_drag_id = ?',
                'ii',
                $dropId, $dragId
            );
            if(!empty($data)) {
                return ($data[0]['c'] > 0);
            }


            return false;
        }


        /**
         * Save Character’s submitted answer for one Drop-field.
         *
         * @param   int $dropId     ID of Drop-field
         * @param   int $characterId    ID of Character
         * @param   string  $answer     Submitted Drag-field-ID for this field
         */
        public function setCharacterSubmission($dropId, $characterId, $answer)
        {
            if(is_null($answer))
            {
                $this->db->query(
                    'DELETE FROM questtypes_dragndrop_drops_characters '.
                    'WHERE questtypes_dragndrop_drop_id = ? AND character_id = ?',
                    'ii',
                    $dropId, $characterId
                );
            }
            else
            {
                $this->db->query(
                    'INSERT INTO questtypes_dragndrop_drops_characters '.
                    '(questtypes_dragndrop_drop_id, character_id, questtypes_dragndrop_drag_id) '.
                    'VALUES '.
                    '(?, ?, ?) '.
                    'ON DUPLICATE KEY UPDATE '.
                    'questtypes_dragndrop_drag_id = ?',
                    'iiii',
                    $dropId, $characterId, $answer, $answer
                );
            }
        }


        /**
         * Get Character’s saved answer for one Drop-field.
         *
         * @param   int $dropId     ID of Drop-field
         * @param   int $characterId    ID of Character
         * @return  int         ID of Drag-field or null
         */
        public function getCharacterSubmission($dropId, $characterId)
        {
            $data = $this->db->query(
                'SELECT questtypes_dragndrop_drag_id '.
                'FROM questtypes_dragndrop_drops_characters '.
                'WHERE questtypes_dragndrop_drop_id = ? AND character_id = ?',
                'ii',
                $dropId, $characterId
            );
            if(!empty($data)) {
                return $data[0]['questtypes_dragndrop_drag_id'];
            }


            return null;
        }

    }

?>