<?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 ChoiceinputQuesttypeAgent for choosing between
	 * predefined input values.
	 * 
	 * @author	Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
	 */
	class ChoiceinputQuesttypeModel extends \hhu\z\models\QuesttypeModel
	{
		
		
		
		
		/**
		 * Get choiceinput-text for a Quest.
		 * 
		 * @param	int	$questId	ID of Quest
		 * @return	array			Choiceinput-text
		 */
		public function getChoiceinputQuest($questId)
		{
			$data = $this->db->query(
				'SELECT text '.
				'FROM questtypes_choiceinput '.
				'WHERE quest_id = ?',
				'i',
				$questId
			);
			if(!empty($data)) {
				return $data[0];
			}
			
			
			return null;
		}
		
		
		/**
		 * Get all lists of input values for a choiceinput-text.
		 * 
		 * @param	int	$questId	ID of Quest
		 * @return	array			List
		 */
		public function getChoiceinputLists($questId)
		{
			return $this->db->query(
				'SELECT id, number, questtypes_choiceinput_choice_id '.
				'FROM questtypes_choiceinput_lists '.
				'WHERE questtypes_choiceinput_quest_id = ? '.
				'ORDER BY number ASC',
				'i',
				$questId
			);
		}
		
		
		/**
		 * Get the list of values for a choiceinput-list.
		 * 
		 * @param	int	$listId	ID of list
		 * @return	array		Input values
		 */
		public function getChoiceinputChoices($listId)
		{
			return $this->db->query(
				'SELECT id, pos, text '.
				'FROM questtypes_choiceinput_choices '.
				'WHERE questtypes_choiceinput_list_id = ? '.
				'ORDER BY pos ASC',
				'i',
				$listId
			);
		}
		
		
		/**
		 * Save Character’s submitted answer for one choiceinput-list.
		 * 
		 * @param	int	$regexId	ID of list
		 * @param	int	$characterId	ID of Character
		 * @param	string	$answer		Submitted answer for this list
		 */
		public function setCharacterSubmission($listId, $characterId, $answer)
		{
			if(is_null($answer))
			{
				$this->db->query(
					'INSERT INTO questtypes_choiceinput_lists_characters '.
					'(questtypes_choiceinput_list_id, character_id, questtypes_choiceinput_choice_id) '.
					'VALUES '.
					'(?, ?, NULL) '.
					'ON DUPLICATE KEY UPDATE '.
					'questtypes_choiceinput_choice_id = NULL',
					'ii',
					$listId, $characterId
				);
			}
			else
			{
				$this->db->query(
					'INSERT INTO questtypes_choiceinput_lists_characters '.
					'(questtypes_choiceinput_list_id, character_id, questtypes_choiceinput_choice_id) '.
					'VALUES '.
					'(?, ?, ?) '.
					'ON DUPLICATE KEY UPDATE '.
					'questtypes_choiceinput_choice_id = ?',
					'iiii',
					$listId, $characterId, $answer, $answer
				);
			}
		}
		
		
		/**
		 * Get answer of one choiceinput-list submitted by Character.
		 * 
		 * @param	int	$regexId	ID of list
		 * @param	int	$characterId	ID of Character
		 * @return	int			Submitted answer for this list or null
		 */
		public function getCharacterSubmission($listId, $characterId)
		{
			$data = $this->db->query(
				'SELECT questtypes_choiceinput_choice_id '.
				'FROM questtypes_choiceinput_lists_characters '.
				'WHERE questtypes_choiceinput_list_id = ? AND character_id = ? ',
				'ii',
				$listId, $characterId
			);
			if(!empty($data)) {
				return $data[0]['questtypes_choiceinput_choice_id'];
			}
			
			
			return null;
		}


		/**
		 * Set the text for a Quest and correct choice input lists count.
		 * 
		 * @param	int	$userId		ID of user setting text
		 * @param	int	$questId	ID of Quest to set text for
		 * @param	string	$text		Text for Quest
		 */
		public function setTextForQuest($userId, $questId, $text)
		{
			$this->db->setAutocommit(false);
			try {
				// Set text
				$this->db->query(
					'INSERT INTO questtypes_choiceinput '.
					'(quest_id, created_user_id, text) '.
					'VALUES '.
					'(?, ?, ?) '.
					'ON DUPLICATE KEY UPDATE '.
					'text = ?',
					'iiss',
					$questId,
					$userId,
					$text,
					$text
				);

				// Count fields
				$listCount = substr_count($text, '[choiceinput]');

				// Remove fields
				$this->db->query(
					'DELETE FROM questtypes_choiceinput_lists '.
					'WHERE questtypes_choiceinput_quest_id = ? AND number > ?',
					'ii',
					$questId,
					$listCount
				);

				// Add fields
				for($i=1; $i<=$listCount; $i++)
				{
					$this->db->query(
						'INSERT IGNORE INTO questtypes_choiceinput_lists '.
						'(questtypes_choiceinput_quest_id, number, questtypes_choiceinput_choice_id) '.
						'VALUES '.
						'(?, ?, NULL) ',
						'ii',
						$questId,
						$i
					);
				}

				$this->db->commit();
			}
			catch(\Exception $e) {
				$this->db->rollback();
				$this->db->setAutocommit(true);
				throw $e;
			}

			$this->db->setAutocommit(true);
		}


		/**
		 * Set list of choices for a text.
		 * 
		 * @param	int	$questId	ID of Quest to set choices for
		 * @param	int	$number		List number
		 * @param	array	$choices	List of choices
		 * @param	int	$correctPos	Position of correct answer
		 */
		public function setListForText($questId, $number, $choices, $correctPos)
		{
			// Get ID of list
			$listId = $this->db->query(
				'SELECT id '.
				'FROM questtypes_choiceinput_lists '.
				'WHERE questtypes_choiceinput_quest_id = ? AND number = ?',
				'ii',
				$questId,
				$number
			);
			$listId = $listId[0]['id'];

			// Manage choices
			$this->db->setAutocommit(false);
			try {
				// Remove choices
				$this->db->query(
					'DELETE FROM questtypes_choiceinput_choices '.
					'WHERE questtypes_choiceinput_list_id = ? AND pos > ?',
					'ii',
					$listId,
					count($choices)
				);

				// Add choices
				foreach($choices as $index => &$choice)
				{
					$this->db->query(
						'INSERT INTO questtypes_choiceinput_choices '.
						'(questtypes_choiceinput_list_id, pos, text) '.
						'VALUES '.
						'(?, ?, ?) '.
						'ON DUPLICATE KEY UPDATE '.
						'text = ?',
						'iiss',
						$listId,
						$index + 1,
						$choice,
						$choice
					);
				}

				// Set correct choice for list
				$this->db->query(
					'UPDATE questtypes_choiceinput_lists '.
					'SET questtypes_choiceinput_choice_id = ('.
						'SELECT id '.
						'FROM questtypes_choiceinput_choices '.
						'WHERE questtypes_choiceinput_list_id = ? AND pos = ?'.
					') '.
					'WHERE id = ?',
					'iii',
					$listId,
					$correctPos,
					$listId
				);

				$this->db->commit();
			}
			catch(\Exception $e) {
				$this->db->rollback();
				$this->db->setAutocommit(true);
				throw $e;
			}

			$this->db->setAutocommit(true);
		}
		
	}

?>

