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

public partial class EnemyController : TurnController
{
    
    public PackedScene _enemyScene = GD.Load<PackedScene>("res://Enemy.tscn");
    public List<Enemy> _enemies = new();
    public PlayerController _playerController;

    public void AddEnemies(int ENEMY_COUNT = 1)
    {
        for (int i = 0; i < ENEMY_COUNT; i++)
        {
            Enemy newEnemy = _enemyScene.Instantiate<Enemy>();
            newEnemy.Death += RemoveEnemy;
            List<GridMarker> lastRow = _grid._gridMarkers.Last();
            List<GridMarker> unoccupiedMarkers = [.. lastRow.Where(m => m._occupant == null).Cast<GridMarker>()];
            GridMarker randomMarker = unoccupiedMarkers[Globals._rng.Next(unoccupiedMarkers.Count)];
            WarpEnemy(newEnemy, randomMarker);
            _enemies.Add(newEnemy);
            AddChild(newEnemy);
        }
    }

    public void Initiate()
    {
        AddEnemies(3);
    }

    public void MoveEnemy(Enemy ENEMY)
    {
        ENEMY._gridMarker = _grid.GetMarkerByAddress((Vector2I)(ENEMY._gridMarker._address + ENEMY._speed));
        Tween tween = CreateTween();
        tween.TweenProperty(ENEMY, "global_position", ENEMY._gridMarker.GlobalPosition, 1.0f);
    }

    public void MoveEnemies(List<Enemy> ENEMIES = null)
    {
        ENEMIES ??= _enemies;
        Tween tween = CreateTween();
        tween.SetParallel();
        for (int i = 0; i < ENEMIES.Count; i++)
        {
            ENEMIES[i]._gridMarker = _grid.GetMarkerByAddress((Vector2I)(ENEMIES[i]._gridMarker._address + ENEMIES[i]._speed));
            tween.TweenProperty(ENEMIES[i], "global_position", ENEMIES[i]._gridMarker.GlobalPosition, 0.4f);
        }
        tween.TweenCallback(Callable.From(() => EmitSignal(SignalName.TurnDone)));
    }

    public void RemoveEnemy(Enemy ENEMY_TO_REMOVE)
    {
        _enemies.Remove(ENEMY_TO_REMOVE);
        ENEMY_TO_REMOVE.QueueFree();
    }

    public override void StartTurn()
    {
        AddEnemies();
        MoveEnemies();
    }

    public void WarpEnemy(Enemy ENEMY, GridMarker DESTINATION_MARKER)
    {
        ENEMY._gridMarker = DESTINATION_MARKER;
        ENEMY.GlobalPosition = DESTINATION_MARKER.GlobalPosition;
    }
}