using System;

namespace Config.Net
{
   /// <summary>
   /// Configuration store interface
   /// </summary>
   public interface IConfigStore : IDisposable
   {
      /// <summary>
      /// Returns true if store supports read operation.
      /// </summary>
      bool CanRead { get; }

      /// <summary>
      /// Returns true if store supports write operation.
      /// </summary>
      bool CanWrite { get; }

      /// <summary>
      /// Reads a key from the store.
      /// </summary>
      /// <param name="key">Key name.</param>
      /// <returns>If key exists in the store returns the value, othwise returns null.</returns>
      string? Read(string key);

      /// <summary>
      /// Writes a key to the store.
      /// </summary>
      /// <param name="key">Key name</param>
      /// <param name="value">Key value. Value of NULL usually means the key will be deleted, at least
      /// this is the recomendation for the custom store implementers.</param>
      void Write(string key, string? value);
   }
}