<?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\models;
	
	
	/**
	 * Model for XP-levels.
	 * 
	 * @author	Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
	 */
	class XplevelsModel extends \hhu\z\Model
	{
		
		
		/**
		 * Construct a new XplevelsModel.
		 */
		public function __construct()
		{
			parent::__construct();
		}
		
		
		/**
		 * Get XP-level by its ID.
		 * 
		 * @throws	\nre\exceptions\IdNotFoundException
		 * @param	int	$xplevelId	ID of XP-level
		 * @return	array			XP-level data
		 */
		public function getXPLevelById($xplevelId)
		{
			$data = $this->db->query(
				'SELECT id, seminary_id, xps, level, name '.
				'FROM xplevels '.
				'WHERE id = ?',
				'i',
				$xplevelId
			);
			if(empty($data)) {
				throw new \nre\exceptions\IdNotFoundException($xplevelId);
			}
			
			
			return $data[0];
		}


		/**
		 * Get all XP-levels for a Seminary.
		 * 
		 * @throws	\nre\exceptions\IdNotFoundException
		 * @param	int	$seminaryId	ID of Seminary
		 * @return	array			List of XP-level
		 */
		public function getXPLevelsForSeminary($seminaryId)
		{
			return $this->db->query(
				'SELECT id, seminary_id, xps, level, name '.
				'FROM xplevels '.
				'WHERE seminary_id = ? '.
				'ORDER BY level ASC',
				'i',
				$seminaryId
			);
		}


		/**
		 * Create a new XP-level for a Seminary.
		 * 
		 * @param	int	$userId		ID of creating user
		 * @param	int	$seminaryId	ID of Seminary
		 * @param	int	$xps		XPs of new XP-level
		 * @param	string	$name		Name of new XP-level (optional)
		 */
		public function createXPLevel($userId, $seminaryId, $xps, $name=null)
		{
			// Get level
			$level = $this->db->query(
				'SELECT COALESCE(MAX(level),0)+1 AS level '.
				'FROM xplevels '.
				'WHERE seminary_id = ?',
				'i',
				$seminaryId
			);
			$level = $level[0]['level'];

			$this->db->setAutocommit(false);
			try {
				// Create XP-level
				$this->db->query(
					'INSERT INTO xplevels '.
					'(created_user_id, seminary_id, xps, level, name) '.
					'VALUES '.
					'(?, ?, ?, ?, ?)',
					'iiiis',
					$userId,
					$seminaryId,
					$xps,
					$level,
					$name
				);
				$xplevelId = $this->db->getInsertId();

				// Create avatars
				$this->db->query(
					'INSERT INTO avatars '.
					'(created_user_id, charactertype_id, xplevel_id) '.
					'SELECT ?, charactertypes.id, ? '.
					'FROM charactertypes '.
					'WHERE seminary_id = ?',
					'iii',
					$userId,
					$xplevelId,
					$seminaryId
				);

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

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


		/**
		 * Edit a XP-level.
		 * 
		 * @param	int	$xplevelId	ID of XP-level to edit
		 * @param	int	$xps		New XPs of XP-level
		 * @param	string	$name		New name of XP-level (optional)
		 */
		public function editXPLevel($xplevelId, $xps, $name=null)
		{
			$this->db->query(
				'UPDATE xplevels '.
				'SET xps = ?, name = ? '.
				'WHERE id = ?',
				'isi',
				$xps,
				$name,
				$xplevelId
			);
		}


		/**
		 * Delete a XP-level.
		 * 
		 * @param	int	$xplevel	XP-level to delete
		 */
		public function deleteXPLevel($xplevel)
		{
			$this->db->setAutocommit(false);
			try {
				// Delete XP-level
				$this->db->query('DELETE FROM xplevels WHERE id = ?', 'i', $xplevel['id']);

				// Adjust levels
				$this->db->query(
					'UPDATE xplevels '.
					'SET level = level - 1 '.
					'WHERE seminary_id = ? AND level > ?',
					'ii',
					$xplevel['seminary_id'],
					$xplevel['level']
				);

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

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

?>