<?php

/**
 * GDK_Points_Database class
 */
class GDK_Points_Database
{
    public static $prefix = "points_";
    public static function points_get_table($table)
    {
        global $wpdb;
        $result = "";
        switch ($table) {
            case "users":
                $result = $wpdb->prefix . self::$prefix . "users";
                break;
        }
        return $result;
    }
}

/**
 * GDK_Points class
 */
class GDK_Points
{

    public static function get_points_by_user($user_id, $limit = null, $order_by = null, $order = null, $output = OBJECT, $offset = 0)
    {
        global $wpdb;

        $limit_str = '';
        if (isset($limit) && ($limit !== null)) {
            $limit_str = ' LIMIT ' . $offset . ' ,' . $limit;
        }
        $order_by_str = "";
        if (isset($order_by) && ($order_by !== null)) {
            $order_by_str = " ORDER BY " . $order_by;
        }
        $order_str = "";
        if (isset($order) && ($order !== null)) {
            $order_str = " " . $order;
        }

        $result = $wpdb->get_results('SELECT * FROM ' . GDK_Points_Database::points_get_table('users') . " WHERE user_id = '$user_id'" . $order_by_str . $order_str . $limit_str, $output);

        return $result;
    }

    public static function get_user_total_points($user_id, $status = null)
    {
        global $wpdb;

        $result = 0;

        $where_status = '';
        if ($status !== null) {
            $where_status = " AND status = '" . $status . "'";
        }
        $points = $wpdb->get_row("SELECT SUM(points) as total FROM " . GDK_Points_Database::points_get_table("users") . " WHERE user_id = '$user_id' " . $where_status);

        if ($points && ($points->total !== null)) {
            $result = $points->total;
        }
        return $result;
    }

    public static function get_users_total_points($limit = null, $order_by = null, $order = null, $status = null)
    {
        global $wpdb;

        $where_status = '';
        if ($status !== null) {
            $where_status = " WHERE status = '" . $status . "'";
        }
        $points = $wpdb->get_results("SELECT SUM(points) as total, user_id FROM " . GDK_Points_Database::points_get_table("users") . $where_status . " GROUP BY user_id");

        return $points;
    }

    /**
     * Get users id who have some points
     * @param  $user_id
     * @return array
     */
    public static function get_users()
    {
        global $wpdb;

        $users_id = $wpdb->get_results("SELECT user_id FROM " . GDK_Points_Database::points_get_table("users") . " GROUP BY user_id");

        $result = array();
        if (sizeof($users_id) > 0) {
            foreach ($users_id as $user_id) {
                $result[] = $user_id->user_id;
            }
        }
        return $result;
    }

    public static function set_points($points, $user_id, $info = array())
    {
        global $wpdb;

        $values = array('points' => $points);

        if (isset($info['datetime']) && ($info['datetime'] !== "")) {
            $values['datetime'] = $info['datetime'];
        } else {
            $values['datetime'] = date('Y-m-d H:i:s', time());
        }
        if (isset($info['description'])) {
            $values['description'] = $info['description'];
        }
        if (isset($info['status'])) {
            $values['status'] = $info['status'];
        }
        if (isset($info['type'])) {
            $values['type'] = $info['type'];
        }
        if (isset($info['data'])) {
            $values['data'] = $info['data']; // yet serialized
        }
        if (isset($info['ip'])) {
            $values['ip'] = $info['ip'];
        }
        if (isset($info['ipv6'])) {
            $values['ipv6'] = $info['ipv6'];
        }
        $values['user_id'] = $user_id;

        $rows_affected = $wpdb->insert(GDK_Points_Database::points_get_table("users"), $values);

        return $rows_affected;
    }

    /**
     * Get a points list.
     * @param int $limit
     * @param string $order_by
     * @param string $order
     * @return Ambigous <mixed, NULL, multitype:, multitype:multitype: , multitype:Ambigous <multitype:, NULL> >
     */
    public static function get_points($limit = null, $order_by = null, $order = null, $output = OBJECT)
    {
        global $wpdb;

        $where_str = " WHERE status != 'removed'";

        $limit_str = "";
        if (isset($limit) && ($limit !== null)) {
            $limit_str = " LIMIT 0 ," . $limit;
        }
        $order_by_str = "";
        if (isset($order_by) && ($order_by !== null)) {
            $order_by_str = " ORDER BY " . $order_by;
        }
        $order_str = "";
        if (isset($order) && ($order !== null)) {
            $order_str = " " . $order;
        }

        $result = $wpdb->get_results("SELECT * FROM " . GDK_Points_Database::points_get_table("users") . $where_str . $order_by_str . $order_str . $limit_str, $output);

        return $result;
    }

    public static function get_point($point_id = null)
    {
        global $wpdb;

        $result = null;

        if (isset($point_id) && ($point_id !== null)) {

            $points_id_str = " WHERE point_id = " . (int)$point_id;
            $result        = $wpdb->get_row("SELECT * FROM " . GDK_Points_Database::points_get_table("users") . $points_id_str);
        }

        return $result;
    }

    public static function remove_points($point_id)
    {
        global $wpdb;

        $values           = array();
        $values['status'] = 'removed';

        $rows_affected = $wpdb->update(GDK_Points_Database::points_get_table("users"), $values, array('point_id' => $point_id));

        if (!$rows_affected) {
            $rows_affected = null;
        }
        return $rows_affected;
    }

    public static function update_points($point_id, $info = array())
    {
        global $wpdb;

        $values = array();

        if (isset($info['user_id'])) {
            $values['user_id'] = $info['user_id'];
        }
        if (isset($info['datetime'])) {
            $values['datetime'] = $info['datetime'];
        }
        if (isset($info['description'])) {
            $values['description'] = $info['description'];
        }
        if (isset($info['status'])) {
            $values['status'] = $info['status'];
        }
        if (isset($info['points'])) {
            $values['points'] = $info['points'];
        }
        if (isset($info['type'])) {
            $values['type'] = $info['type'];
        }
        if (isset($info['data'])) {
            $values['data'] = $info['data']; // yet serialized
        }
        if (isset($info['ip'])) {
            $values['ip'] = $info['ip'];
        }
        if (isset($info['ipv6'])) {
            $values['ipv6'] = $info['ipv6'];
        }

        $rows_affected = $wpdb->update(GDK_Points_Database::points_get_table("users"), $values, array('point_id' => $point_id));

        if (!$rows_affected) { // insert
            $rows_affected = null;
        }
        return $rows_affected;
    }
}