using System;

using Framework.Services;
using UnityEngine.VR;

namespace Framework.Input.Profiles {

  /// <summary>Manages the current source of input for the game</summary>
  [ServiceScope(Scope.Global)]
  public class InputSelector : Service, IInputSelector {

#if INPUT_SOURCE_CAN_EVER_BE_SWITCHED
    /// <summary>Triggered when the input profile has been switched</summary>
    public event Action SourceChanged;
#endif // INPUT_SOURCE_CAN_EVER_BE_SWITCHED

    /// <summary>Currently active source of inputs</summary>
    public InputSources ActiveSource {
      get {
        if(this.activeSource.HasValue) {
          return this.activeSource.Value;
        } else {
          if(VRSettings.enabled && VRSettings.isDeviceActive) {
            return InputSources.VirtualReality;
          } else {
            return InputSources.Controllers;
          }          
        }
      }
    }

    /// <summary>Changes the active source of inputs</summary>
    /// <param name="newSource">New source inputs will be taken from</param>
    public void Switch(InputSources newSource) {
      this.activeSource = newSource;
    }

    /// <summary>Currently active source of inputs if explicitly assigned</summary>
    private InputSources? activeSource;

  }
  
} // namespace Framework.Input.Profiles