#import "RNFIRMessaging.h"

#import <React/RCTConvert.h>
#import <React/RCTEventDispatcher.h>
#import <React/RCTUtils.h>

@import UserNotifications;
#import <FirebaseMessaging/FirebaseMessaging.h>
#import <FirebaseInstanceID/FirebaseInstanceID.h>

#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_8_0

#define UIUserNotificationTypeAlert UIRemoteNotificationTypeAlert
#define UIUserNotificationTypeBadge UIRemoteNotificationTypeBadge
#define UIUserNotificationTypeSound UIRemoteNotificationTypeSound
#define UIUserNotificationTypeNone  UIRemoteNotificationTypeNone
#define UIUserNotificationType      UIRemoteNotificationType

#endif

NSString *const FCMNotificationReceived = @"FCMNotificationReceived";

@implementation RCTConvert (NSCalendarUnit)

RCT_ENUM_CONVERTER(NSCalendarUnit,
                   (@{
                      @"year": @(NSCalendarUnitYear),
                      @"month": @(NSCalendarUnitMonth),
                      @"week": @(NSCalendarUnitWeekOfYear),
                      @"day": @(NSCalendarUnitDay),
                      @"hour": @(NSCalendarUnitHour),
                      @"minute": @(NSCalendarUnitMinute)
                      }),
                   0,
                   integerValue)
@end


@implementation RCTConvert (UNNotificationRequest)

+ (UNNotificationRequest *)UNNotificationRequest:(id)json
{
  NSDictionary<NSString *, id> *details = [self NSDictionary:json];
  UNMutableNotificationContent *content = [UNMutableNotificationContent new];
  content.title =[RCTConvert NSString:details[@"title"]];
  content.body =[RCTConvert NSString:details[@"body"]];
  NSString* sound = [RCTConvert NSString:details[@"sound"]];
  if(sound != nil){
    content.sound = [UNNotificationSound soundNamed:sound];
  }else{
    content.sound = [UNNotificationSound defaultSound];
  }
  content.categoryIdentifier = [RCTConvert NSString:details[@"click_action"]];
  content.userInfo = details;
  content.badge = [RCTConvert NSNumber:details[@"badge"]];
  
  NSDate *fireDate = [RCTConvert NSDate:details[@"fire_date"]];
  
  if(fireDate == nil){
    return [UNNotificationRequest requestWithIdentifier:[RCTConvert NSString:details[@"id"]] content:content trigger:nil];
  }
  
  NSCalendarUnit interval = [RCTConvert NSCalendarUnit:details[@"repeat_interval"]];
  NSCalendarUnit unitFlags;
  switch (interval) {
    case NSCalendarUnitMinute: {
      unitFlags = NSCalendarUnitSecond;
      break;
    }
    case NSCalendarUnitHour: {
      unitFlags = NSCalendarUnitMinute | NSCalendarUnitSecond;
      break;
    }
    case NSCalendarUnitDay: {
      unitFlags = NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
      break;
    }
    case NSCalendarUnitWeekOfYear: {
      unitFlags = NSCalendarUnitWeekday | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
      break;
    }
    case NSCalendarUnitMonth:{
      unitFlags = NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    }
    case NSCalendarUnitYear:{
      unitFlags = NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    }
    default:
      unitFlags = NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
      break;
  }
  NSDateComponents *components = [[NSCalendar currentCalendar] components:unitFlags fromDate:fireDate];
  UNCalendarNotificationTrigger *trigger = [UNCalendarNotificationTrigger triggerWithDateMatchingComponents:components repeats:interval != 0];
  return [UNNotificationRequest requestWithIdentifier:[RCTConvert NSString:details[@"id"]] content:content trigger:trigger];
}

@end

@implementation RCTConvert (UILocalNotification)

+ (UILocalNotification *)UILocalNotification:(id)json
{
  NSDictionary<NSString *, id> *details = [self NSDictionary:json];
  UILocalNotification *notification = [UILocalNotification new];
  notification.fireDate = [RCTConvert NSDate:details[@"fire_date"]] ?: [NSDate date];
  if([notification respondsToSelector:@selector(setAlertTitle:)]){
    [notification setAlertTitle:[RCTConvert NSString:details[@"title"]]];
  }
  notification.alertBody = [RCTConvert NSString:details[@"body"]];
  notification.alertAction = [RCTConvert NSString:details[@"alert_action"]];
  notification.soundName = [RCTConvert NSString:details[@"sound"]] ?: UILocalNotificationDefaultSoundName;
  notification.userInfo = details;
  notification.category = [RCTConvert NSString:details[@"click_action"]];
  notification.repeatInterval = [RCTConvert NSCalendarUnit:details[@"repeat_interval"]];
  notification.applicationIconBadgeNumber = [RCTConvert NSInteger:details[@"badge"]];
  return notification;
}

RCT_ENUM_CONVERTER(UIBackgroundFetchResult, (@{
                                               @"UIBackgroundFetchResultNewData": @(UIBackgroundFetchResultNewData),
                                               @"UIBackgroundFetchResultNoData": @(UIBackgroundFetchResultNoData),
                                               @"UIBackgroundFetchResultFailed": @(UIBackgroundFetchResultFailed),
                                               }), UIBackgroundFetchResultNoData, integerValue)

RCT_ENUM_CONVERTER(UNNotificationPresentationOptions, (@{
                                               @"UNNotificationPresentationOptionAll": @(UNNotificationPresentationOptionAlert | UNNotificationPresentationOptionBadge | UNNotificationPresentationOptionSound),
                                               @"UNNotificationPresentationOptionNone": @(UNNotificationPresentationOptionNone)}), UIBackgroundFetchResultNoData, integerValue)

@end

@interface RNFIRMessaging ()
  @property (nonatomic, strong) NSMutableDictionary *notificationCallbacks;
@end

@implementation RNFIRMessaging

RCT_EXPORT_MODULE()

@synthesize bridge = _bridge;

+ (void)didReceiveRemoteNotification:(nonnull NSDictionary *)userInfo fetchCompletionHandler:(nonnull RCTRemoteNotificationCallback)completionHandler {
  NSMutableDictionary* data = [[NSMutableDictionary alloc] initWithDictionary: userInfo];
  [data setValue:@"remote_notification" forKey:@"_notificationType"];
  [data setValue:@(RCTSharedApplication().applicationState == UIApplicationStateInactive) forKey:@"opened_from_tray"];
  [[NSNotificationCenter defaultCenter] postNotificationName:FCMNotificationReceived object:self userInfo:@{@"data": data, @"completionHandler": completionHandler}];
}

+ (void)didReceiveLocalNotification:(UILocalNotification *)notification {
  NSMutableDictionary* data = [[NSMutableDictionary alloc] initWithDictionary: notification.userInfo];
  [data setValue:@"local_notification" forKey:@"_notificationType"];
  [[NSNotificationCenter defaultCenter] postNotificationName:FCMNotificationReceived object:self userInfo:@{@"data": data}];
}

+ (void)didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(nonnull RCTNotificationResponseCallback)completionHandler
{
  NSMutableDictionary* data = [[NSMutableDictionary alloc] initWithDictionary: response.notification.request.content.userInfo];
  [data setValue:@"notification_response" forKey:@"_notificationType"];
  [data setValue:@YES forKey:@"opened_from_tray"];
  if (response.actionIdentifier) {
      [data setValue:response.actionIdentifier forKey:@"_actionIdentifier"];
  }
  [[NSNotificationCenter defaultCenter] postNotificationName:FCMNotificationReceived object:self userInfo:@{@"data": data, @"completionHandler": completionHandler}];
}

+ (void)willPresentNotification:(UNNotification *)notification withCompletionHandler:(nonnull RCTWillPresentNotificationCallback)completionHandler
{
  NSMutableDictionary* data = [[NSMutableDictionary alloc] initWithDictionary: notification.request.content.userInfo];
  [data setValue:@"will_present_notification" forKey:@"_notificationType"];
  [[NSNotificationCenter defaultCenter] postNotificationName:FCMNotificationReceived object:self userInfo:@{@"data": data, @"completionHandler": completionHandler}];
}

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

- (void)setBridge:(RCTBridge *)bridge
{
  _bridge = bridge;
  
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(handleNotificationReceived:)
                                               name:FCMNotificationReceived
                                             object:nil];
  
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(disconnectFCM)
                                               name:UIApplicationDidEnterBackgroundNotification
                                             object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(connectToFCM)
                                               name:UIApplicationDidBecomeActiveNotification
                                             object:nil];
  
  [[NSNotificationCenter defaultCenter]
   addObserver:self selector:@selector(onTokenRefresh)
   name:kFIRInstanceIDTokenRefreshNotification object:nil];
  
  [[NSNotificationCenter defaultCenter]
   addObserver:self selector:@selector(sendDataMessageFailure:)
   name:FIRMessagingSendErrorNotification object:nil];
  
  [[NSNotificationCenter defaultCenter]
   addObserver:self selector:@selector(sendDataMessageSuccess:)
   name:FIRMessagingSendSuccessNotification object:nil];
  
  // For iOS 10 data message (sent via FCM)
  dispatch_async(dispatch_get_main_queue(), ^{
    [[FIRMessaging messaging] setRemoteMessageDelegate:self];
    [self connectToFCM];
  });
}

- (void)connectToFCM
{
  [[FIRMessaging messaging] connectWithCompletion:^(NSError * _Nullable error) {
    if (error != nil) {
      NSLog(@"Unable to connect to FCM. %@", error);
    } else {
      NSLog(@"Connected to FCM.");
    }
  }];
}

- (void)disconnectFCM
{
  [[FIRMessaging messaging] disconnect];
  NSLog(@"Disconnected from FCM");
}

RCT_EXPORT_METHOD(getInitialNotification:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject){
  UILocalNotification *localUserInfo = _bridge.launchOptions[UIApplicationLaunchOptionsLocalNotificationKey];
  if (localUserInfo) {
    resolve([[localUserInfo userInfo] copy]);
    return;
  }
  resolve([_bridge.launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey] copy]);
}

RCT_EXPORT_METHOD(getFCMToken:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
  resolve([[FIRInstanceID instanceID] token]);
}

- (void) onTokenRefresh
{
  [_bridge.eventDispatcher sendDeviceEventWithName:@"FCMTokenRefreshed" body:[[FIRInstanceID instanceID] token]];
}

RCT_EXPORT_METHOD(requestPermissions)
{
  if (RCTRunningInAppExtension()) {
    return;
  }
  if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_9_x_Max) {
    UIUserNotificationType allNotificationTypes =
    (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);
    UIApplication *app = RCTSharedApplication();
    if ([app respondsToSelector:@selector(registerUserNotificationSettings:)]) {
      //iOS 8 or later
      UIUserNotificationSettings *notificationSettings =
      [UIUserNotificationSettings settingsForTypes:(NSUInteger)allNotificationTypes categories:nil];
      [app registerUserNotificationSettings:notificationSettings];
    } else {
      //iOS 7 or below
      [app registerForRemoteNotificationTypes:(NSUInteger)allNotificationTypes];
    }
  } else {
    // iOS 10 or later
#if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
    UNAuthorizationOptions authOptions =
    UNAuthorizationOptionAlert
    | UNAuthorizationOptionSound
    | UNAuthorizationOptionBadge;
    [[UNUserNotificationCenter currentNotificationCenter]
     requestAuthorizationWithOptions:authOptions
     completionHandler:^(BOOL granted, NSError * _Nullable error) {
     }
     ];
#endif
  }
  
  [[UIApplication sharedApplication] registerForRemoteNotifications];
}

RCT_EXPORT_METHOD(subscribeToTopic: (NSString*) topic)
{
  [[FIRMessaging messaging] subscribeToTopic:topic];
}

RCT_EXPORT_METHOD(unsubscribeFromTopic: (NSString*) topic)
{
  [[FIRMessaging messaging] unsubscribeFromTopic:topic];
}

// Receive data message on iOS 10 devices.
- (void)applicationReceivedRemoteMessage:(FIRMessagingRemoteMessage *)remoteMessage {
  [_bridge.eventDispatcher sendDeviceEventWithName:FCMNotificationReceived body:[remoteMessage appData]];
}

RCT_EXPORT_METHOD(presentLocalNotification:(id)data resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
  if([UNUserNotificationCenter currentNotificationCenter] != nil){
    UNNotificationRequest* request = [RCTConvert UNNotificationRequest:data];
    [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
      if (!error) {
        resolve(nil);
      }else{
        reject(@"notification_error", @"Failed to present local notificaton", error);
      }
    }];
  }else{
    UILocalNotification* notif = [RCTConvert UILocalNotification:data];
    [RCTSharedApplication() presentLocalNotificationNow:notif];
    resolve(nil);
  }
}

RCT_EXPORT_METHOD(scheduleLocalNotification:(id)data resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
  if([UNUserNotificationCenter currentNotificationCenter] != nil){
    UNNotificationRequest* request = [RCTConvert UNNotificationRequest:data];
    [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
      if (!error) {
        resolve(nil);
      }else{
        reject(@"notification_error", @"Failed to present local notificaton", error);
      }
    }];
  }else{
    UILocalNotification* notif = [RCTConvert UILocalNotification:data];
    [RCTSharedApplication() scheduleLocalNotification:notif];
    resolve(nil);
  }
}

RCT_EXPORT_METHOD(removeDeliveredNotification:(NSString*) notificationId)
{
  if([UNUserNotificationCenter currentNotificationCenter] != nil){
    [[UNUserNotificationCenter currentNotificationCenter] removeDeliveredNotificationsWithIdentifiers:@[notificationId]];
  }
}

RCT_EXPORT_METHOD(removeAllDeliveredNotifications)
{
  if([UNUserNotificationCenter currentNotificationCenter] != nil){
    [[UNUserNotificationCenter currentNotificationCenter] removeAllDeliveredNotifications];
  } else {
    [RCTSharedApplication() setApplicationIconBadgeNumber: 0];
  }
}

RCT_EXPORT_METHOD(cancelAllLocalNotifications)
{
  if([UNUserNotificationCenter currentNotificationCenter] != nil){
    [[UNUserNotificationCenter currentNotificationCenter] removeAllPendingNotificationRequests];
  } else {
    [RCTSharedApplication() cancelAllLocalNotifications];
  }
}

RCT_EXPORT_METHOD(cancelLocalNotification:(NSString*) notificationId)
{
  if([UNUserNotificationCenter currentNotificationCenter] != nil){
    [[UNUserNotificationCenter currentNotificationCenter] removePendingNotificationRequestsWithIdentifiers:@[notificationId]];
  }else {
    for (UILocalNotification *notification in [UIApplication sharedApplication].scheduledLocalNotifications) {
      NSDictionary<NSString *, id> *notificationInfo = notification.userInfo;
      if([notificationId isEqualToString:[notificationInfo valueForKey:@"id"]]){
        [[UIApplication sharedApplication] cancelLocalNotification:notification];
      }
    }
  }
}

RCT_EXPORT_METHOD(getScheduledLocalNotifications:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
  if([UNUserNotificationCenter currentNotificationCenter] != nil){
    [[UNUserNotificationCenter currentNotificationCenter] getPendingNotificationRequestsWithCompletionHandler:^(NSArray<UNNotificationRequest *> * _Nonnull requests) {
      NSMutableArray* list = [[NSMutableArray alloc] init];
      for(UNNotificationRequest * notif in requests){
        NSString* interval;
        UNMutableNotificationContent *content = notif.content;
        [list addObject:content.userInfo];
      }
      resolve(list);
    }];
  }else{
    NSMutableArray* list = [[NSMutableArray alloc] init];
    for(UILocalNotification * notif in [RCTSharedApplication() scheduledLocalNotifications]){
      [list addObject:notif.userInfo];
    }
    resolve(list);
  }
}

RCT_EXPORT_METHOD(setBadgeNumber: (NSInteger*) number)
{
  [RCTSharedApplication() setApplicationIconBadgeNumber:number];
}

RCT_EXPORT_METHOD(getBadgeNumber: (RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject)
{
  resolve(@([RCTSharedApplication() applicationIconBadgeNumber]));
}

RCT_EXPORT_METHOD(send:(NSString*)senderId withPayload:(NSDictionary *)message)
{
  NSMutableDictionary * mMessage = [message mutableCopy];
  NSMutableDictionary * upstreamMessage = [[NSMutableDictionary alloc] init];
  for (NSString* key in mMessage) {
    upstreamMessage[key] = [NSString stringWithFormat:@"%@", [mMessage valueForKey:key]];
  }
  
  NSDictionary *imMessage = [NSDictionary dictionaryWithDictionary:upstreamMessage];
  
  int64_t ttl = 3600;
  NSString * receiver = [NSString stringWithFormat:@"%@@gcm.googleapis.com", senderId];
  
  NSUUID *uuid = [NSUUID UUID];
  NSString * messageID = [uuid UUIDString];
  
  [[FIRMessaging messaging]sendMessage:imMessage to:receiver withMessageID:messageID timeToLive:ttl];
}

RCT_EXPORT_METHOD(finishRemoteNotification: (NSString *)completionHandlerId fetchResult:(UIBackgroundFetchResult)result){
  RCTRemoteNotificationCallback completionHandler = self.notificationCallbacks[completionHandlerId];
  if (!completionHandler) {
    RCTLogError(@"There is no completion handler with completionHandlerId: %@", completionHandlerId);
    return;
  }
  completionHandler(result);
  [self.notificationCallbacks removeObjectForKey:completionHandlerId];
}

RCT_EXPORT_METHOD(finishWillPresentNotification: (NSString *)completionHandlerId fetchResult:(UNNotificationPresentationOptions)result){
  RCTWillPresentNotificationCallback completionHandler = self.notificationCallbacks[completionHandlerId];
  if (!completionHandler) {
    RCTLogError(@"There is no completion handler with completionHandlerId: %@", completionHandlerId);
    return;
  }
  completionHandler(result);
  [self.notificationCallbacks removeObjectForKey:completionHandlerId];
}

RCT_EXPORT_METHOD(finishNotificationResponse: (NSString *)completionHandlerId){
  RCTNotificationResponseCallback completionHandler = self.notificationCallbacks[completionHandlerId];
  if (!completionHandler) {
    RCTLogError(@"There is no completion handler with completionHandlerId: %@", completionHandlerId);
    return;
  }
  completionHandler();
  [self.notificationCallbacks removeObjectForKey:completionHandlerId];
}

- (void)handleNotificationReceived:(NSNotification *)notification
{
  id completionHandler = notification.userInfo[@"completionHandler"];
  NSMutableDictionary* data = notification.userInfo[@"data"];
  if(completionHandler != nil){
    NSString *completionHandlerId = [[NSUUID UUID] UUIDString];
    if (!self.notificationCallbacks) {
      // Lazy initialization
      self.notificationCallbacks = [NSMutableDictionary dictionary];
    }
    self.notificationCallbacks[completionHandlerId] = completionHandler;
    data[@"_completionHandlerId"] = completionHandlerId;
  }
  
  [_bridge.eventDispatcher sendDeviceEventWithName:FCMNotificationReceived body:data];
  
}

- (void)sendDataMessageFailure:(NSNotification *)notification
{
  NSString *messageID = (NSString *)notification.userInfo[@"messageID"];
  
  NSLog(@"sendDataMessageFailure: %@", messageID);
}

- (void)sendDataMessageSuccess:(NSNotification *)notification
{
  NSString *messageID = (NSString *)notification.userInfo[@"messageID"];
  
  NSLog(@"sendDataMessageSuccess: %@", messageID);
}

@end
