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

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

   private bool _gameOver = false;
   private int _characterIndex = 0;

   [Export]
   private Array<PackedScene> PlayerScenes;

   public IEnumerable<Player> Players = new List<Player>();

   public override void _Ready()
   {
      foreach (var playerScene in PlayerScenes)
      {
         var player = playerScene.Instantiate();
         Players = Players.Append((Player)player);
         GD.Print("Players added");
      }
   }

   public void SetToNextCharacter(Player player) => _characterIndex = (++_characterIndex) % player.PlayableCharacters.Count();

   public void SetToPreviousCharacter(Player player) => _characterIndex = _characterIndex == 0 ? player.PlayableCharacters.Count() - 1 : --_characterIndex;

   public void ResetPlayerPosition(Player player)
   {
      player.SpawnPoint.SetPlayerPosition(player.SelectedCharacter);
   }

   public void OnCharacterSelected(Player player)
   {
      GD.Print("Instancing...");
      var selectedCharacter = player.PlayableCharacters[_characterIndex].Instantiate();
      player.SelectedCharacter = selectedCharacter as Character;
      GetTree().Root.AddChild(player.SelectedCharacter);
      player.SpawnPoint.SetPlayerPosition(player.SelectedCharacter);
   }

   public void RemoveCharacter(Player player)
   {
      player.PlayableCharacters.Remove(player.PlayableCharacters.ElementAt(_characterIndex));
      player.SelectedCharacter?.QueueFree();
      _characterIndex = 0;
      if (player.PlayableCharacters.Count() > 0)
         EmitSignal(SignalName.ReselectCharacter, player);
   }

   public void SetGameOver(bool isGameOver)
   {
      _gameOver = isGameOver;
      if (isGameOver)
         EmitSignal(SignalName.OnGameOver);
   }

   public bool IsGameOver => _gameOver;
}