using Godot;
using Godot.Collections;
using System.Linq;

public partial class Main : Node
{
   [Export]
   public Array<PackedScene> Levels;
   [Export]
   public PackedScene GameManager;
   [Export]
   private Label _fpsCounter;

   public int NumberOfPlayers = 0;

   public override void _Ready()
   {
	  Input.MouseMode = Input.MouseModeEnum.Captured;
   }

   public override void _Process(double delta)
   {
	  _fpsCounter.Text = $"FPS: {Engine.GetFramesPerSecond()}";
   }

   public void LoadLevel(int indexToLoad, int numberOfPlayers)
   {
	  var sceneToLoad = Levels.ElementAt(indexToLoad);
	  CallDeferred(nameof(DeferredGoToScene), sceneToLoad);

	  NumberOfPlayers = numberOfPlayers;

	  var gameManager = GameManager.Instantiate();
	  AddChild(gameManager);
	  var gameManagerInstance = (GameManager)gameManager;

	  var bgmPlayer = GetTree().Root.GetNode<BGMPlayer>("BgmPlayer");
	  bgmPlayer.ProcessMode = ProcessModeEnum.Always;
	  bgmPlayer.SetBGMFromFilepath("Audio/BGM/An-Imitation-of-Heaven.ogg");
	  bgmPlayer.PlayBGM();

	  var animationNode = GetNode<AnimationPlayer>("SceneTransition/AnimationPlayer");
	  animationNode.Play($"Level{indexToLoad + 1}");
	  animationNode.AnimationFinished += EnableCharacterSelect;
   }

   public void LoadNextLevel(int currentSceneIndex)
   {
	  if (currentSceneIndex < Levels.Count())
	  {
		 var currentScene = Levels.ToList().ElementAt(currentSceneIndex);
		 CallDeferred(nameof(DeferredGoToScene), Levels.ElementAt(currentSceneIndex));
		 var animationNode = GetNode<AnimationPlayer>("SceneTransition/AnimationPlayer");
		 animationNode.Play($"Level{currentSceneIndex + 1}");
		 animationNode.AnimationFinished += EnableCharacterSelect;
	  }
   }
   private void DeferredGoToScene(PackedScene sceneToAdd)
   {
	  if (GetTree().GetFirstNodeInGroup("Level") != null)
		 GetTree().GetFirstNodeInGroup("Level").QueueFree();
	  var nextScene = GD.Load<PackedScene>(sceneToAdd.ResourcePath);
	  var newScene = nextScene.Instantiate();
	  GetTree().Root.AddChild(newScene);
   }


   private void EnableCharacterSelect(StringName animationName)
   {
	  GD.Print("On animation finished: Enable characters");
	  var gameManagerInstance = GetNode<GameManager>("GameManager");
	  foreach (var player in gameManagerInstance.Players)
		 gameManagerInstance.OnHandleCharacterSelectUI(player);
	  GetTree().Paused = true;
	  var animationNode = GetNode<AnimationPlayer>("SceneTransition/AnimationPlayer");
	  animationNode.AnimationFinished -= EnableCharacterSelect;
   }
}