text: // Copyright 2020 Google LLC
  //
  // Licensed 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 "FirebasePerformance/Sources/Configurations/FPRRemoteConfigFlags.h"
  
  #import "FirebaseRemoteConfig/Sources/Private/FIRRemoteConfig_Private.h"
  
  NS_ASSUME_NONNULL_BEGIN
  
  static NSString *const kFPRConfigPrefix = @"com.fireperf";
  
  /** Interval at which the configurations can be fetched. Specified in seconds. */
  static NSInteger const kFPRConfigFetchIntervalInSeconds = 12 * 60 * 60;
  
  /** Interval after which the configurations can be fetched. Specified in seconds. */
  static NSInteger const kFPRConfigAppStartDelayInSeconds = 1 * 30;
  
  /** This extension should only be used for testing. */
  @interface FPRRemoteConfigFlags ()
  
  /** @brief Instance of remote config used for firebase performance namespace. */
  @property(nonatomic) FIRRemoteConfig *fprRemoteConfig;
  
  /** @brief Last activated time of the configurations. */
  @property(atomic) NSDate *lastFetchedTime;
  
  /** @brief User defaults used for caching. */
  @property(nonatomic) NSUserDefaults *userDefaults;
  
  /**
   * Creates an instance of FPRRemoteConfigFlags.
   *
   * @param config RemoteConfig object to be used for configuration management.
   * @return Instance of remote config.
   */
  - (instancetype)initWithRemoteConfig:(FIRRemoteConfig *)config NS_DESIGNATED_INITIALIZER;
  
  #pragma mark - Config fetch methods
  
  /**
   * Gets and returns the string value for the provided remote config flag. If there are no values
   * returned from remote config, default value will be returned.
   * @param flagName Name of the flag for which the value needs to be fetched from RC.
   * @param defaultValue Default value that will be returned if no value is fetched from RC.
   *
   * @return string value for the flag from RC if available. Default value, otherwise.
   */
  - (NSString *)getStringValueForFlag:(NSString *)flagName defaultValue:(NSString *)defaultValue;
  
  /**
   * Gets and returns the int value for the provided remote config flag. If there are no values
   * returned from remote config, default value will be returned.
   * @param flagName Name of the flag for which the value needs to be fetched from RC.
   * @param defaultValue Default value that will be returned if no value is fetched from RC.
   *
   * @return Int value for the flag from RC if available. Default value, otherwise.
   */
  - (int)getIntValueForFlag:(NSString *)flagName defaultValue:(int)defaultValue;
  
  /**
   * Gets and returns the float value for the provided remote config flag. If there are no values
   * returned from remote config, default value will be returned.
   * @param flagName Name of the flag for which the value needs to be fetched from RC.
   * @param defaultValue Default value that will be returned if no value is fetched from RC.
   *
   * @return Float value for the flag from RC if available. Default value, otherwise.
   */
  - (float)getFloatValueForFlag:(NSString *)flagName defaultValue:(float)defaultValue;
  
  /**
   * Gets and returns the boolean value for the provided remote config flag. If there are no values
   * returned from remote config, default value will be returned.
   * @param flagName Name of the flag for which the value needs to be fetched from RC.
   * @param defaultValue Default value that will be returned if no value is fetched from RC.
   *
   * @return Bool value for the flag from RC if available. Default value, otherwise.
   */
  - (BOOL)getBoolValueForFlag:(NSString *)flagName defaultValue:(BOOL)defaultValue;
  
  /**
   * Caches the remote config values.
   */
  - (void)cacheConfigValues;
  
  /**
   * Reset (Clears) all the remote config keys and values that were cached.
   */
  - (void)resetCache;
  
  @end
  
  NS_ASSUME_NONNULL_END
  