<?php

class ConfiguratorOpt extends ObjectModel
{
    public $id_configurator_opt_group;
    public $price;
    public $position;
    
    public $name;
    
    public static $definition = array(
        'table' => 'configurator_opt',
        'primary' => 'id_configurator_opt',
        'multilang' => true,
        'fields' => array(
            'id_configurator_opt_group' => array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
            
            'price' => array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
            'position' => array('type' => self::TYPE_INT, 'validate' => 'isInt'),
            
            /* Lang fields */
            'name' => array('type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName', 'required' => true, 'size' => 255),
        ),
    );
    
    
    /**
     * Move an attribute inside its group
     * @param bool $way Up (1)  or Down (0)
     * @param int $position
     * @return bool Update result
     */
    public function updatePosition($way, $position)
    {
        if (!$id_configurator_opt_group = (int)Tools::getValue('id_configurator_opt_group')) {
            $id_configurator_opt_group = (int)$this->id_configurator_opt_group;
        }
        
        $sql = '
			SELECT a.`id_configurator_opt`, a.`position`, a.`id_configurator_opt_group`
			FROM `'._DB_PREFIX_.'configurator_opt` a
			WHERE a.`id_configurator_opt_group` = '.(int)$id_configurator_opt_group.'
			ORDER BY a.`position` ASC';
        
        if (!$res = Db::getInstance()->executeS($sql)) {
            return false;
        }
        
        foreach ($res as $attribute) {
            if ((int)$attribute['id_configurator_opt'] == (int)$this->id) {
                $moved_attribute = $attribute;
            }
        }
        
        if (!isset($moved_attribute) || !isset($position)) {
            return false;
        }
        
        // < and > statements rather than BETWEEN operator
        // since BETWEEN is treated differently according to databases
        
        $res1 = Db::getInstance()->execute('
			UPDATE `'._DB_PREFIX_.'configurator_opt`
			SET `position`= `position` '.($way ? '- 1' : '+ 1').'
			WHERE `position`
			'.($way
			    ? '> '.(int)$moved_attribute['position'].' AND `position` <= '.(int)$position
			    : '< '.(int)$moved_attribute['position'].' AND `position` >= '.(int)$position).'
			AND `id_configurator_opt_group`='.(int)$moved_attribute['id_configurator_opt_group']
            );
        
        $res2 = Db::getInstance()->execute('
			UPDATE `'._DB_PREFIX_.'configurator_opt`
			SET `position` = '.(int)$position.'
			WHERE `id_configurator_opt` = '.(int)$moved_attribute['id_configurator_opt'].'
			AND `id_configurator_opt_group`='.(int)$moved_attribute['id_configurator_opt_group']
            );
        
        return ($res1 && $res2);
    }
    
    /**
     * Reorder attribute position in group $id_attribute_group.
     * Call it after deleting an attribute from a group.
     *
     * @param int $id_attribute_group
     * @param bool $use_last_attribute
     * @return bool $return
     */
    public function cleanPositions($id_configurator_opt_group, $use_last = true)
    {
        Db::getInstance()->execute('SET @i = -1', false);
        $sql = 'UPDATE `'._DB_PREFIX_.'configurator_opt` SET `position` = @i:=@i+1 WHERE';
        
        if ($use_last) {
            $sql .= ' `id_configurator_opt` != '.(int)$this->id.' AND';
        }
        
        $sql .= ' `id_configurator_opt_group` = '.(int)$id_configurator_opt_group.' ORDER BY `position` ASC';
        
        $return = Db::getInstance()->execute($sql);
    }
    
    /**
     * getHigherPosition
     *
     * Get the higher attribute position from a group attribute
     *
     * @param int $id_attribute_group
     * @return int $position
     */
    public static function getHigherPosition($id_configurator_opt_group)
    {
        $sql = 'SELECT MAX(`position`)
				FROM `'._DB_PREFIX_.'configurator_opt`
				WHERE id_configurator_opt_group = '.(int)$id_configurator_opt_group;
        
        $position = DB::getInstance()->getValue($sql);
        
        return (is_numeric($position)) ? $position : -1;
    }
    
}