/*
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
*/
#import <CoreTelephony/CTTelephonyNetworkInfo.h>

#import "CDVConnection.h"
#import "CDVReachability.h"

@interface CDVConnection (PrivateMethods)
- (void)updateOnlineStatus;
- (void)sendPluginResult;
@end

@implementation CDVConnection

@synthesize connectionType, internetReach;

- (void)getConnectionInfo:(CDVInvokedUrlCommand*)command
{
_callbackId = command.callbackId;
[self sendPluginResult];
}

- (void)sendPluginResult
{
CDVPluginResult* result = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:self.connectionType];

[result setKeepCallbackAsBool:YES];
[self.commandDelegate sendPluginResult:result callbackId:_callbackId];
}

- (NSString*)w3cConnectionTypeFor:(CDVReachability*)reachability
{
NetworkStatus networkStatus = [reachability currentReachabilityStatus];

switch (networkStatus) {
case NotReachable:
return @"none";

case ReachableViaWWAN:
{
BOOL isConnectionRequired = [reachability connectionRequired];
if (isConnectionRequired) {
return @"none";
} else {
if ([[[UIDevice currentDevice] systemVersion] compare:@"7.0" options:NSNumericSearch] != NSOrderedAscending) {
CTTelephonyNetworkInfo *telephonyInfo = [CTTelephonyNetworkInfo new];
if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyGPRS]) {
return @"2g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyEdge]) {
return @"2g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyWCDMA]) {
return @"3g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyHSDPA]) {
return @"3g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyHSUPA]) {
return @"3g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyCDMA1x]) {
return @"3g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyCDMAEVDORev0]) {
return @"3g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyCDMAEVDORevA]) {
return @"3g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyCDMAEVDORevB]) {
return @"3g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyeHRPD]) {
return @"3g";
} else if ([telephonyInfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyLTE]) {
return @"4g";
}
}
return @"cellular";
}
}
case ReachableViaWiFi:
{
BOOL isConnectionRequired = [reachability connectionRequired];
if (isConnectionRequired) {
return @"none";
} else {
return @"wifi";
}
}
default:
return @"unknown";
}
}

- (BOOL)isCellularConnection:(NSString*)theConnectionType
{
return [theConnectionType isEqualToString:@"2g"] ||
[theConnectionType isEqualToString:@"3g"] ||
[theConnectionType isEqualToString:@"4g"] ||
[theConnectionType isEqualToString:@"cellular"];
}

- (void)updateReachability:(CDVReachability*)reachability
{
if (reachability) {
// check whether the connection type has changed
NSString* newConnectionType = [self w3cConnectionTypeFor:reachability];
if ([newConnectionType isEqualToString:self.connectionType]) { // the same as before, remove dupes
return;
} else {
self.connectionType = [self w3cConnectionTypeFor:reachability];
}
}
[self sendPluginResult];
}

- (void)updateConnectionType:(NSNotification*)note
{
CDVReachability* curReach = [note object];

if ((curReach != nil) && [curReach isKindOfClass:[CDVReachability class]]) {
[self updateReachability:curReach];
}
}

- (void)onPause
{
[self.internetReach stopNotifier];
}

- (void)onResume
{
[self.internetReach startNotifier];
[self updateReachability:self.internetReach];
}

- (void)pluginInitialize
{
self.connectionType = @"none";
self.internetReach = [CDVReachability reachabilityForInternetConnection];
self.connectionType = [self w3cConnectionTypeFor:self.internetReach];
[self.internetReach startNotifier];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(updateConnectionType:)
name:kReachabilityChangedNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(updateConnectionType:)
name:CTRadioAccessTechnologyDidChangeNotification object:nil];
if (UIApplicationDidEnterBackgroundNotification && UIApplicationWillEnterForegroundNotification) {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onPause) name:UIApplicationDidEnterBackgroundNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onResume) name:UIApplicationWillEnterForegroundNotification object:nil];
}
}

@end