using Godot;

namespace GameJamDungeon
{
  /// <summary>
  /// Utility class that loads and instantiates scenes.
  /// </summary>
  public interface IInstantiator
  {
    /// <summary>Scene tree.</summary>
    public SceneTree SceneTree { get; }

    /// <summary>
    /// Loads and instantiates the given scene.
    /// </summary>
    /// <param name="path">Path to the scene.</param>
    /// <typeparam name="T">Type of the scene's root.</typeparam>
    /// <returns>Instance of the scene.</returns>
    T LoadAndInstantiate<T>(string path) where T : Node;
  }

  /// <summary>
  /// Utility class that loads and instantiates scenes.
  /// </summary>
  public class Instantiator : IInstantiator
  {
    public SceneTree SceneTree { get; }

    public Instantiator(SceneTree sceneTree)
    {
      SceneTree = sceneTree;
    }

    public T LoadAndInstantiate<T>(string path) where T : Node
    {
      var scene = GD.Load<PackedScene>(path);
      return scene.Instantiate<T>();
    }
  }
}