<?php  
  
/*session_start(); 
if(!isset($_SESSION['zaszh_user_id'])){ 
    echo json_encode(array('status'=>'error','msg'=>'連接超時，請重新打開頁面。')); 
    exit; 
} 
$user_id = $_SESSION['zaszh_user_id'];*/  
  
$user_id = 1; // 測試用  
$exchange_points = intval($_GET['exchange_points']);  
  
require('connect_database.php');  
// 扣除答題積分  
$mysqli->query("update zaszh_user set answer_points=answer_points-{$exchange_points} where id='{$user_id}' and answer_points>={$exchange_points}");  
if($mysqli->affected_rows){  
    // 有積分  
    switch($exchange_points){  
        // 5元話費  
        case 200:  
            $mysqli->query("update zaszh_telephone_charge_surplus set charge_surplus=charge_surplus-5 where date=substring(now(),1,10) and charge_surplus>=5");  
            if($mysqli->affected_rows){  
                // 有剩余  
                $mysqli->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','5元話費',unix_timestamp(now()))");  
                if($mysqli->affected_rows){  
                    echo json_encode(array('status'=>'success','msg'=>'5元話費'));  
                }else{  
                    // 獲獎失敗  
                }  
            }else{  
                // 無剩余  
                // 恢復答題積分  
                $mysqli->query("update zaszh_user set answer_points=answer_points+{$exchange_points} where id='{$user_id}'");  
            }  
            break;  
        // 10元話費  
        case 400:  
            $mysqli->query("update zaszh_telephone_charge_surplus set charge_surplus=charge_surplus-10 where date=substring(now(),1,10) and charge_surplus>=10");  
            if($mysqli->affected_rows){  
                // 有剩余  
                $mysqli->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','10元話費',unix_timestamp(now()))");  
                if($mysqli->affected_rows){  
                    echo json_encode(array('status'=>'success','msg'=>'10元話費'));  
                }else{  
                    // 獲獎失敗  
                }  
            }else{  
                // 無剩余  
                // 恢復答題積分  
                $mysqli->query("update zaszh_user set answer_points=answer_points+{$exchange_points} where id='{$user_id}'");  
            }  
            break;  
    }  
  
    // 記錄積分消耗  
    $mysqli->query("insert into zaszh_answer_points_consume(user_id,points_consume,consume_for,create_date) values('{$user_id}','{$exchange_points}','exchange',unix_timestamp(now()))");  
}else{  
    // 無積分  
    echo json_encode(array('status'=>'error','msg'=>'您的積分不足。'));  
}  
$mysqli->close();