/**
 在这方方法中收到微信请求，异步处理完成后必须调用sendResp发送处理结果给微信,可能收到 GetMessageFromWXReq 、ShowMessageFromWXReq等
 */

-(void) onReq:(BaseReq*)req
{
    if([req isKindOfClass:[GetMessageFromWXReq class]])
    {
        // 微信请求App提供内容， 需要app提供内容后使用sendRsp返回
        NSString *strTitle = [NSString stringWithFormat:@"微信请求App提供内容"];
        NSString *strMsg = @"微信请求App提供内容，App要调用sendResp:GetMessageFromWXResp返回给微信";
        
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:strTitle message:strMsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
        alert.tag = 1000;
        [alert show];
        [alert release];
    }
    else if([req isKindOfClass:[ShowMessageFromWXReq class]])
    {
        ShowMessageFromWXReq* temp = (ShowMessageFromWXReq*)req;
        WXMediaMessage *msg = temp.message;
        
        //显示微信传过来的内容
        WXAppExtendObject *obj = msg.mediaObject;
        
        NSString *strTitle = [NSString stringWithFormat:@"微信请求App显示内容"];
        NSString *strMsg = [NSString stringWithFormat:@"标题：%@ \n内容：%@ \n附带信息：%@ \n缩略图:%lu bytes\n\n", msg.title, msg.description, obj.extInfo, msg.thumbData.length];
        
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:strTitle message:strMsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
        [alert show];
        [alert release];
    }
    else if([req isKindOfClass:[LaunchFromWXReq class]])
    {
        //从微信启动App
        NSString *strTitle = [NSString stringWithFormat:@"从微信启动"];
        NSString *strMsg = @"这是从微信启动的消息";
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:strTitle message:strMsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
        [alert show];
        [alert release];
    } else if ([req isKindOfClass:[PayReq class]]) {
        NSLog(@"hehe");
    }
}

-(void) onResp:(BaseResp*)resp
{
    NSString *strMsg = [NSString stringWithFormat:@"errcode:%d", resp.errCode];
    NSString *strTitle;
    
    if([resp isKindOfClass:[SendMessageToWXResp class]])
    {
        strTitle = [NSString stringWithFormat:@"发送媒体消息结果"];
    }
    if([resp isKindOfClass:[PayResp class]]){
        //支付返回结果，实际支付结果需要去微信服务器端查询
        strTitle = [NSString stringWithFormat:@"支付结果"];
        
        switch (resp.errCode) {
            case WXSuccess:
                strMsg = @"支付结果：成功！";
                NSLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode);
                break;
                
            default:
                strMsg = [NSString stringWithFormat:@"支付结果：失败！retcode = %d, retstr = %@", resp.errCode,resp.errStr];
                NSLog(@"错误，retcode = %d, retstr = %@", resp.errCode,resp.errStr);
                break;
        }
    }
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:strTitle message:strMsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    [alert show];
    [alert release];
}

/**
 发送请求并从服务器得到相应的数据，如果获取的数据不为空，则将数据传给PayReq进行+(BOOL) sendReq:(BaseReq*)req;处理
 */
- (void)sendPay
{
    //从服务器获取支付参数，服务端自定义处理逻辑和格式
    //订单标题
    NSString *ORDER_NAME    = @"Ios服务器端签名支付 测试";
    //订单金额，单位（元）
    NSString *ORDER_PRICE   = @"0.01";

    //根据服务器端编码确定是否转码
    NSStringEncoding enc;
    //if UTF8编码
    //enc = NSUTF8StringEncoding;
    //if GBK编码
    enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
    NSString *urlString = [NSString stringWithFormat:@"%@?plat=ios&order_no=%@&product_name=%@&order_price=%@",
                           SP_URL,
                           [[NSString stringWithFormat:@"%ld",time(0)] stringByAddingPercentEscapesUsingEncoding:enc],
                           [ORDER_NAME stringByAddingPercentEscapesUsingEncoding:enc],
                           ORDER_PRICE];
    
    //解析服务端返回json数据
    NSError *error;
    //加载一个NSURL对象
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];
    //将请求的url数据放到NSData对象中
    NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    if ( response != nil) {
        NSMutableDictionary *dict = NULL;
        //IOS5自带解析类NSJSONSerialization从response中解析出数据放到字典中
        dict = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
        
        NSLog(@"url:%@",urlString);
        if(dict != nil){
            NSMutableString *retcode = [dict objectForKey:@"retcode"];
            if (retcode.intValue == 0){
                NSMutableString *stamp  = [dict objectForKey:@"timestamp"];
                
                //调起微信支付
                PayReq* req             = [[[PayReq alloc] init]autorelease];
                req.openID              = [dict objectForKey:@"appid"];
                req.partnerId           = [dict objectForKey:@"partnerid"];
                req.prepayId            = [dict objectForKey:@"prepayid"];
                req.nonceStr            = [dict objectForKey:@"noncestr"];
                req.timeStamp           = stamp.intValue;
                req.package             = [dict objectForKey:@"package"];
                req.sign                = [dict objectForKey:@"sign"];
                [WXApi sendReq:req];
                //日志输出
                NSLog(@"日志输出 appid=%@\npartid=%@\nprepayid=%@\nnoncestr=%@\ntimestamp=%ld\npackage=%@\nsign=%@",req.openID,req.partnerId,req.prepayId,req.nonceStr,(long)req.timeStamp,req.package,req.sign );
            }else{
                [self alert:@"提示信息" msg:[dict objectForKey:@"retmsg"]];
            }
        }else{
            [self alert:@"提示信息" msg:@"服务器返回错误，未获取到json对象"];
        }
    }else{
        [self alert:@"提示信息" msg:@"服务器返回错误"];
    }
}