#import "RNPermissionHandlerNotifications.h"

@import UserNotifications;
@import UIKit;

@interface RNPermissionHandlerNotifications()

@property (nonatomic, strong) void (^resolve)(RNPermissionStatus status, NSDictionary * _Nonnull settings);
@property (nonatomic, strong) void (^reject)(NSError *error);

@end

@implementation RNPermissionHandlerNotifications

+ (NSString * _Nonnull)handlerUniqueId {
  return @"ios.permission.NOTIFICATIONS";
}

- (void)checkWithResolver:(void (^ _Nonnull)(RNPermissionStatus status, NSDictionary * _Nonnull settings))resolve
                 rejecter:(void (^ _Nonnull)(NSError * _Nonnull error))reject {
  if (@available(iOS 10.0, *)) {
    [[UNUserNotificationCenter currentNotificationCenter] getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
      NSMutableDictionary *result = [NSMutableDictionary new];

      bool alert = settings.alertSetting == UNNotificationSettingEnabled;
      bool badge = settings.badgeSetting == UNNotificationSettingEnabled;
      bool sound = settings.soundSetting == UNNotificationSettingEnabled;
      bool lockScreen = settings.lockScreenSetting == UNNotificationSettingEnabled;
      bool carPlay = settings.carPlaySetting == UNNotificationSettingEnabled;
      bool notificationCenter = settings.notificationCenterSetting == UNNotificationSettingEnabled;

      if (settings.alertSetting != UNNotificationSettingNotSupported)
        [result setValue:@(alert) forKey:@"alert"];
      if (settings.badgeSetting != UNNotificationSettingNotSupported)
        [result setValue:@(badge) forKey:@"badge"];
      if (settings.soundSetting != UNNotificationSettingNotSupported)
        [result setValue:@(sound) forKey:@"sound"];
      if (settings.lockScreenSetting != UNNotificationSettingNotSupported)
        [result setValue:@(lockScreen) forKey:@"lockScreen"];
      if (settings.carPlaySetting != UNNotificationSettingNotSupported)
        [result setValue:@(carPlay) forKey:@"carPlay"];
      if (settings.notificationCenterSetting != UNNotificationSettingNotSupported)
        [result setValue:@(notificationCenter) forKey:@"notificationCenter"];

      if (@available(iOS 12.0, *)) {
        bool criticalAlert = settings.criticalAlertSetting == UNNotificationSettingEnabled;

        if (settings.criticalAlertSetting != UNNotificationSettingNotSupported)
          [result setValue:@(criticalAlert) forKey:@"criticalAlert"];
      }

      switch (settings.authorizationStatus) {
        case UNAuthorizationStatusNotDetermined:
#ifdef __IPHONE_12_0
        case UNAuthorizationStatusProvisional:
#endif
          return resolve(RNPermissionStatusNotDetermined, result);
        case UNAuthorizationStatusDenied:
          return resolve(RNPermissionStatusDenied, result);
        case UNAuthorizationStatusAuthorized:
          return resolve(RNPermissionStatusAuthorized, result);
      }
    }];
  } else {
    UIUserNotificationSettings *settings = [[UIApplication sharedApplication] currentUserNotificationSettings];
    UIUserNotificationType types = [settings types];

    NSDictionary *result = @{
      @"alert": @((bool)(types & UIUserNotificationTypeAlert)),
      @"badge": @((bool)(types & UIUserNotificationTypeBadge)),
      @"sound": @((bool)(types & UIUserNotificationTypeSound)),
    };

    if (types != UIUserNotificationTypeNone) {
      return resolve(RNPermissionStatusAuthorized, result);
    } else if ([RNPermissions isFlaggedAsRequested:[[self class] handlerUniqueId]]) {
      return resolve(RNPermissionStatusDenied, result);
    } else {
      return resolve(RNPermissionStatusNotDetermined, result);
    }
  }
}

- (void)requestWithResolver:(void (^ _Nonnull)(RNPermissionStatus status, NSDictionary * _Nonnull settings))resolve
                   rejecter:(void (^ _Nonnull)(NSError * _Nonnull error))reject
                    options:(NSArray<NSString *> * _Nonnull)options {
  _resolve = resolve;
  _reject = reject;

  bool alert = [options containsObject:@"alert"];
  bool badge = [options containsObject:@"badge"];
  bool sound = [options containsObject:@"sound"];
  bool criticalAlert = [options containsObject:@"criticalAlert"];
  bool carPlay = [options containsObject:@"carPlay"];
  bool provisional = [options containsObject:@"provisional"];

  if (@available(iOS 10.0, *)) {
    UNAuthorizationOptions types = UNAuthorizationOptionNone;

    if (alert) types += UNAuthorizationOptionAlert;
    if (badge) types += UNAuthorizationOptionBadge;
    if (sound) types += UNAuthorizationOptionSound;
    if (carPlay) types += UNAuthorizationOptionCarPlay;

    if (@available(iOS 12.0, *)) {
      if (criticalAlert) types += UNAuthorizationOptionCriticalAlert;
      if (provisional) types += UNAuthorizationOptionProvisional;
    }

    if (!alert &&
        !badge &&
        !sound &&
        !criticalAlert &&
        !carPlay &&
        !provisional) {
      types += UNAuthorizationOptionAlert;
      types += UNAuthorizationOptionBadge;
      types += UNAuthorizationOptionSound;
    }

    [[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions:types
                                                                        completionHandler:^(BOOL granted, NSError * _Nullable error) {
      if (error != nil) {
        return reject(error);
      }

      if (granted) {
        dispatch_async(dispatch_get_main_queue(), ^{
          [[UIApplication sharedApplication] registerForRemoteNotifications];
        });
      }

      [RNPermissions flagAsRequested:[[self class] handlerUniqueId]];
      [self checkWithResolver:self->_resolve rejecter:self->_reject];
    }];
  } else {
    if ([RNPermissions isFlaggedAsRequested:[[self class] handlerUniqueId]]) {
      [self checkWithResolver:_resolve rejecter:_reject];
    } else {
      UIUserNotificationType types = UIUserNotificationTypeNone;

      if (alert) types += UIUserNotificationTypeAlert;
      if (badge) types += UIUserNotificationTypeBadge;
      if (sound) types += UIUserNotificationTypeSound;

      if (!alert &&
          !badge &&
          !sound) {
        types += UIUserNotificationTypeAlert;
        types += UIUserNotificationTypeBadge;
        types += UIUserNotificationTypeSound;
      }

      [[NSNotificationCenter defaultCenter] addObserver:self
                                               selector:@selector(onApplicationDidBecomeActive)
                                                   name:UIApplicationDidBecomeActiveNotification
                                                 object:nil];

      UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:types categories:nil];
      [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
      [[UIApplication sharedApplication] registerForRemoteNotifications];
    }
  }
}

- (void)onApplicationDidBecomeActive {
  [[NSNotificationCenter defaultCenter] removeObserver:self
                                                  name:UIApplicationDidBecomeActiveNotification
                                                object:nil];

  [RNPermissions flagAsRequested:[[self class] handlerUniqueId]];
  [self checkWithResolver:_resolve rejecter:_reject];
}

@end