//
//  NetworkTool.m
//  YouHuiProject
//
//  Created by 小花 on 2018/6/13.
//  Copyright © 2018年 kuxuan. All rights reserved.
//

#import "NetworkTool.h"
#import <CoreTelephony/CTCellularData.h>

@implementation NetworkTool


/*
 CTCellularData在iOS9之前是私有类，权限设置是iOS10开始的，所以App Store审核没有问题
 获取网络权限状态
 */
+ (void)networkStatus:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    //2.根据权限执行相应的交互
    if (@available(iOS 9.0, *)) {
        
        CTCellularData *cellularData = [[CTCellularData alloc] init];
        /*
         此函数会在网络权限改变时再次调用
         */
        cellularData.cellularDataRestrictionDidUpdateNotifier = ^(CTCellularDataRestrictedState state) {
            switch (state) {
                case kCTCellularDataRestricted:
                {
                    
                    NSLog(@"Restricted");
                    //2.1权限关闭的情况下 再次请求网络数据会弹出设置网络提示
                    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"" message:@"检测到您没有启用网络，点击设置按钮进行设置" preferredStyle:UIAlertControllerStyleAlert];
                    UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:nil];
                    UIAlertAction *set = [UIAlertAction actionWithTitle:@"设置" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
                        NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
                        if([[UIApplication sharedApplication]canOpenURL:url] ) {
                            if (@available(iOS 10.0, *)) {
                                [[UIApplication sharedApplication] openURL:url options:@{}completionHandler:^(BOOL success) {
                                }];
                            } else {
                                [[UIApplication sharedApplication]openURL:url];
                            }
                        }
                    }];
                    
                    [alert addAction:cancel];
                    [alert addAction:set];
                    [[self currentViewController] presentViewController:alert animated:YES completion:nil];
                    
                    break;
                }
                case kCTCellularDataNotRestricted:
                    
                    NSLog(@"NotRestricted");
                    //2.2已经开启网络权限 监听网络状态
                    [self addReachabilityManager:application didFinishLaunchingWithOptions:launchOptions];
                    //                [self getInfo_application:application didFinishLaunchingWithOptions:launchOptions];
                    break;
                case kCTCellularDataRestrictedStateUnknown:
                    
                    NSLog(@"Unknown");
                    //2.3未知情况 （还没有遇到推测是有网络但是连接不正常的情况下）
                    break;
                    
                default:
                    break;
            }
        };
        
    } else {
        // Fallback on earlier versions
    }
    
}

/**
 实时检查当前网络状态
 */
+ (void)addReachabilityManager:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    AFNetworkReachabilityManager *afNetworkReachabilityManager = [AFNetworkReachabilityManager sharedManager];
    
    //这个可以放在需要侦听的页面
    //    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(afNetworkStatusChanged:) name:AFNetworkingReachabilityDidChangeNotification object:nil];
    [afNetworkReachabilityManager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        switch (status) {
            case AFNetworkReachabilityStatusNotReachable:{
                NSLog(@"网络不通：%@",@(status) );
                break;
            }
            case AFNetworkReachabilityStatusReachableViaWiFi:{
                NSLog(@"网络通过WIFI连接：%@",@(status));
                
                break;
            }
            case AFNetworkReachabilityStatusReachableViaWWAN:{
                NSLog(@"网络通过无线连接：%@",@(status) );
                
                break;
            }
            default:
                break;
        }
    }];
    
    [afNetworkReachabilityManager startMonitoring];  //开启网络监视器；
}


+ (int)checkNetWorkPermission
{
    if (@available(iOS 9.0, *)) {
        CTCellularData *cellularData = [[CTCellularData alloc]init];
        CTCellularDataRestrictedState state = cellularData.restrictedState;
        return state;
    } else {
        return -1;
    }
    
}

+ (UIViewController *)currentViewController{
    
    UIViewController * currVC = nil;
    UIWindow *window = [UIApplication sharedApplication].delegate.window;
    UIViewController * Rootvc = window.rootViewController;
    
    do {
        if ([Rootvc isKindOfClass:[UINavigationController class]]) {
            UINavigationController * nav = (UINavigationController *)Rootvc;
            UIViewController * v = [nav.viewControllers lastObject];
            currVC = v;
            Rootvc = v.presentedViewController;
            continue;
        }else if([Rootvc isKindOfClass:[UITabBarController class]]){
            UITabBarController * tabVC = (UITabBarController *)Rootvc;
            currVC = tabVC;
            Rootvc = [tabVC.viewControllers objectAtIndex:tabVC.selectedIndex];
            continue;
        }
    } while (Rootvc!=nil);
    
    return currVC;
}

@end