//
//  RAReachability.m
//  Apex And Drivers
//
//  Created by Jack on 2018/10/23.
//  Copyright © 2018年 USAI. All rights reserved.
//

#import "RAReachability.h"
#import "Reachability.h"
#import "config.h"

#define host URL_SERVER

@interface RAReachability ()

@property (nonatomic,copy) void(^ReachabilityBlk)(BOOL);

@end

@implementation RAReachability {
    Reachability *_hostReachability; ///< 服务器可达
    Reachability *_connectionReachability; ///< 本机网络状态
}

+ (instancetype)defaultReachability {
    static RAReachability *reachability;
    static dispatch_once_t token;
    dispatch_once(&token, ^{
        reachability = [[RAReachability alloc] _init];
    });
    return reachability;
}

- (instancetype)_init {
    if (self = [super init]) {
        self->_hostReachability = [Reachability reachabilityWithHostName:host];
        self->_connectionReachability = [Reachability reachabilityForInternetConnection];
        
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityConnectionChanged:) name:kReachabilityChangedNotification object:nil];
    }
    return self;
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)startNotifier:(void(^)(BOOL reachable))reachableBlk {
    
    self.ReachabilityBlk = reachableBlk;
    
    dispatch_async(dispatch_get_global_queue(0, 0), ^{
        
        [self->_hostReachability startNotifier];
        [self->_connectionReachability startNotifier];
        
        [[NSRunLoop currentRunLoop] run];
    });
}

- (void)stopNotifier {
    self.ReachabilityBlk = nil;
    [self->_hostReachability stopNotifier];
    [self->_connectionReachability stopNotifier];
}

- (void)reachabilityConnectionChanged:(NSNotification *)notification {
    
    Reachability *reachability = [notification object];
    if ([reachability isMemberOfClass:[Reachability class]]) {
        
        NetworkStatus status = reachability.currentReachabilityStatus;
        
        dispatch_async(dispatch_get_main_queue(), ^{
            
            if (reachability == self->_hostReachability) {
                
                switch (status) {
                    case NotReachable: {
                        if (self.ReachabilityBlk) {
                            self.ReachabilityBlk(false);
                        }
                    }
                        break;
                    case ReachableViaWiFi: {
                        if (self.ReachabilityBlk) {
                            self.ReachabilityBlk(true);
                        }
                    }
                        break;
                    case ReachableViaWWAN: {
                        if (self.ReachabilityBlk) {
                            self.ReachabilityBlk(true);
                        }
                    }
                        break;
                        
                    default:
                        break;
                }
                
            }
            else if (reachability == self->_connectionReachability) {
                
                switch (status) {
                    case NotReachable: {
                        if (self.ReachabilityBlk) {
                            self.ReachabilityBlk(false);
                        }
                    }
                        break;
                        
                    default: {
                        if (self.ReachabilityBlk) {
                            self.ReachabilityBlk(true);
                        }
                    }
                        break;
                }
            }
            
        });
        
    }
}

@end