#import <PushKit/PushKit.h>

@interface AppDelegate () <PKPushRegistryDelegate>
@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // initialize PKPushRegistry
    PKPushRegistry *pushRegistry = [[PKPushRegistry alloc] initWithQueue:dispatch_get_main_queue()];
    pushRegistry.delegate = self;
    pushRegistry.desiredPushTypes = [NSSet setWithObject:PKPushTypeVoIP];
    return YES;
}

#pragma mark - PKPushRegistryDelegate

// called when the VoIP token is generated
- (void)pushRegistry:(PKPushRegistry *)registry didUpdatePushCredentials:(PKPushCredentials *)credentials forType:(PKPushType)type {
    // call the SDK API to send the VoIP token to the IM server
    [JIM.shared.connectionManager registerVoIPToken:credentials.token];
}

// called when the device receives a VoIP push notification
- (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayload:(PKPushPayload *)payload forType:(PKPushType)type withCompletionHandler:(void (^)(void))completion {
    NSLog(@"Received VoIP push notification: %@", payload.dictionaryPayload);

    // handle business logic based on the push payload, such as displaying the incoming-call UI
    [self handleIncomingCallWithPayload:payload.dictionaryPayload];
}

// handle an incoming call
- (void)handleIncomingCallWithPayload:(NSDictionary *)payload {
    // parse the push payload and display the incoming-call UI

    //call ID
    NSString *callId = payload[@"room_id"];
    //inviter's user ID
    NSString *inviterId = payload[@"inviter_id"];
    //whether this is a group call
    BOOL isMulti;
    //call type
    JCallMediaType mediaType;
    id obj = payload[@"is_multi"];
    if ([obj isKindOfClass:[NSNumber class]]) {
        isMulti = [(NSNumber *)obj boolValue];
    }
    obj = payload[@"media_type"];
    if ([obj isKindOfClass:[NSNumber class]]) {
        mediaType = [(NSNumber *)obj integerValue];
    }

    // TODO: Use CallKit or a custom UI to display the incoming-call notification
}