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

public partial class GameManager : Node
{
   [Signal]
   public delegate void OnGameOverEventHandler();

   [Signal]
   public delegate void OnP1GameOverEventHandler();
   [Signal]
   public delegate void OnP2GameOverEventHandler();

   public int NumberOfPlayers;

   public bool IsP1SelectingCharacter = true;
   public bool IsP2SelectingCharacter = true;

   [Export]
   public Array<PackedScene> _p1Characters;
   [Export]
   public Array<PackedScene> _p2Characters;

   [Export]
   public Character _p1SelectedCharacter;

   [Export]
   public Character _p2SelectedCharacter;

   private bool _p1GameOver = false;
   private bool _p2GameOver = false;

   private int _p1CharacterIndex = 0;
   private int _p2CharacterIndex = 0;

   public void SetP1ToNextCharacter() => _p1CharacterIndex = (++_p1CharacterIndex) % _p1Characters.Count();

   public void SetP1ToPreviousCharacter() => _p1CharacterIndex = _p1CharacterIndex == 0 ? _p1Characters.Count() : --_p1CharacterIndex;

   public void ResetPlayerPosition()
   {
      var playerSpawnPoint = GetNode<SpawnPoint>("P1SpawnPoint");
      playerSpawnPoint.SetPlayerPosition(_p1SelectedCharacter);
   }

   public void OnP1CharacterSelected()
   {
      GD.Print("Instancing...");
      var selectedPlayer = _p1Characters[_p1CharacterIndex].Instantiate();
      _p1SelectedCharacter = selectedPlayer as Character;
      GetTree().Root.AddChild(_p1SelectedCharacter);
      ResetPlayerPosition();
   }

   public void RemoveP1Character()
   {
      _p1Characters.Remove(_p1Characters.ElementAt(_p1CharacterIndex));
      _p1SelectedCharacter?.QueueFree();
      _p1CharacterIndex = 0;
   }

   public void SetP1GameOver(bool isGameOver)
   {
      _p1GameOver = isGameOver;
      if (isGameOver)
      {
         EmitSignal(SignalName.OnP1GameOver);
         CheckForOverallGameOver();
      }
   }

   public bool IsP1GameOver => _p1GameOver;

   public void SetP2GameOver(bool isGameOver)
   {
      _p2GameOver = isGameOver;
      if (isGameOver)
      {
         EmitSignal(SignalName.OnP2GameOver);
         CheckForOverallGameOver();
      }
   }

   private void CheckForOverallGameOver()
   {
      if (_p1GameOver && _p2GameOver)
         EmitSignal(SignalName.OnGameOver);
   }
}

public partial class Character : CharacterBody3D
{
}