//
//  ViewController.m
//  VPNOCDemo
//
//  Created by 程俊铭 on 2022/6/8.
//

#import "ViewController.h"
#import 
#import 

@interface ViewController ()
@property (nonatomic, strong)NETunnelProviderManager *providerManagers;
@property (nonatomic, strong) UIButton *connectBtn;
@property (nonatomic, strong) UILabel *stutusLb;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onVpnStateChange:) name:NEVPNStatusDidChangeNotification object:nil];
    
    [self.connectBtn addTarget:self action:@selector(connect) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.connectBtn];
    [self.view addSubview:self.stutusLb];
    
    [self.connectBtn mas_makeConstraints:^(MASConstraintMaker *make) {
        make.center.equalTo(self.view);
    }];
    [self.stutusLb mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(self.view);
            make.top.equalTo(self.connectBtn.mas_bottom).offset(40);
    }];
    NSURL *url = [[NSBundle mainBundle] URLForResource:@"FlyTestVPN" withExtension:@"ovpn"];
    NSData *data = [[NSData alloc] initWithContentsOfURL:url];
    [self saveVpn:data];
}


///  保存vpn相关的数据
/// @param data 数据
-(void)saveVpn:(NSData *)data
{
    //加载与调用应用程序关联的所有应用程序代理配置，这些配置以前已保存到网络扩展首选项中。
    [NETunnelProviderManager loadAllFromPreferencesWithCompletionHandler:^(NSArray * _Nullable managers, NSError * _Nullable error) {
        if (error) {
            NSLog(@"Load Error: %@", error.description);
        }

        NETunnelProviderManager *manager;
        if (managers.count > 0) {
            manager = managers[0];
        }else {
            manager = [[NETunnelProviderManager alloc] init];
            manager.protocolConfiguration = [[NETunnelProviderProtocol alloc] init];
        }
        
        NETunnelProviderProtocol *tunel = [[NETunnelProviderProtocol alloc]init];
        // 获取文件内容
        tunel.providerConfiguration = @{@"ovpn": data};
        // 项目的Identifier
        tunel.providerBundleIdentifier = @"com.chuancheng.zy.vpn.master.PacketTunnelProvider";
        // serverAddress:即在手机设置的vpn中显示的vpn地址（服务器显示）
        tunel.serverAddress = @"Fly VPN";
//        tunel.username = @"username";
//        tunel.identityDataPassword = @"password";
        // 设备进入睡眠，vpn断开连接
        tunel.disconnectOnSleep = NO;
        // 是否可以编辑
        [manager setEnabled:YES];
        // 协议配置
        [manager setProtocolConfiguration:tunel];
        // 包含vpn描述的字符串（类型显示）
        manager.localizedDescription = @"Fly-加速器";
        // 保存信息
//        SSLWeakSelf(self);
        [manager saveToPreferencesWithCompletionHandler:^(NSError *error) {
            
            if(error) {
                
                NSLog(@"Save error: %@", error);
                
            }else {
                
                self.providerManagers = manager;
                                
                NSLog(@"add success");
                //加载与调用应用程序关联的所有应用程序代理配置，这些配置以前已保存到网络扩展首选项中。
                [manager loadFromPreferencesWithCompletionHandler:^(NSError * _Nullable error) {
                    NSLog(@"loadFromPreferences!");

                }];
            }
        }];
 
    }];
}


-(void)connect
{
    // 连接
    [self.providerManagers loadFromPreferencesWithCompletionHandler:^(NSError * _Nullable error) {
        if(!error){
            
            [self.providerManagers saveToPreferencesWithCompletionHandler:^(NSError * _Nullable error) {
                if (error) {
                    NSLog(@"保存失败");
                }else {
                    NSError *error = nil;
                    [self.providerManagers.connection startVPNTunnelWithOptions:nil andReturnError:&error];
                    if(error) {
                        NSLog(@"Start error: %@", error.localizedDescription);
                    }else{
                        NSLog(@"Connection established!");
                    }
                }
                
               
            }];
            
           
        }
    }];
}

-(void)disconnectAction
{
    // 断开连接
    [self.providerManagers loadFromPreferencesWithCompletionHandler:^(NSError * _Nullable error) {
       
        [self.providerManagers.connection stopVPNTunnel];
    }];

}

-(void)onVpnStateChange:(NSNotification *)Notification {
    NEVPNStatus status = self.providerManagers.connection.status;

    switch (status) {
        case NEVPNStatusInvalid:
        {
            NSLog(@"连接无效");
            self.stutusLb.text = @"连接无效";
        }
            break;
        case NEVPNStatusDisconnected:
        {
            NSLog(@"未连接");
            self.stutusLb.text = @"未连接";
        }
            break;
        case NEVPNStatusConnecting:
        {
            NSLog(@"正在连接");
            self.stutusLb.text = @"正在连接";
        }
            break;
        case NEVPNStatusConnected:
        {
            NSLog(@"已连接");
            self.stutusLb.text = @"已连接";
        }
           
            break;
        case NEVPNStatusDisconnecting:
        {
            NSLog(@"断开连接中...");
            self.stutusLb.text = @"断开连接中...";
        }
           
            break;
        case NEVPNStatusReasserting:
        {
            NSLog(@"重新连接...");
            self.stutusLb.text = @"重新连接...";
        }
            break;
        default:
            break;
    }
}

//@property (nonatomic, strong) UIButton *connectBtn;
//@property (nonatomic, strong) UILabel *stutusLb;
- (UIButton *)connectBtn {
    if (_connectBtn == nil) {
        _connectBtn = [[UIButton alloc]init];
        [_connectBtn setTitle:@"连接" forState:UIControlStateNormal];
        [_connectBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    }
    return _connectBtn;
}

- (UILabel *)stutusLb {
    if (_stutusLb == nil) {
        _stutusLb = [[UILabel alloc]init];
        _stutusLb.text = @"状态";
        _stutusLb.textColor = [UIColor redColor];
    }
    return _stutusLb;
}
@end