using Godot;
using System.Collections.Generic;
using Newlon.Particles;

namespace Newlon.Components.Level;

//
// PoolContainer contains nodes that contain different elemnts that generate during runtime
// Is not pool in traditional sense, but named like that to prevent repetition
//

public partial class PoolContainer : Node2D
{
    [Export]
    public Node2D Zombies { get; private set; }
    [Export]
    public Node2D Plants { get; private set; }
    [Export]
    public Node2D Projectiles { get; private set; }
    [Export]
    public Node2D Structures { get; private set; }
    [Export]
    public Node2D Particles { get; private set; }

    public static PoolContainer Instance { get; private set; }

    //public Dictionary<Vector2, Entity>[] EntityField = { new(), new(), new() };
    private readonly Entity[,] EntityField = new Entity[3,FieldParams.ColumnsCount * FieldParams.RowsCount];
    public override void _EnterTree()
    {
        Instance = this;
    }
    public bool TryGetEntity<T>(Vector2 positionVector, out T result, int layer = 1) where T : Entity
    {
        var position = VectorToIndex(positionVector);
        result = EntityField[layer, position] as T;
        return EntityField[layer,position] != null
                && result != null;
    }
    public bool TrySetEntity(Vector2 positionVector, Entity whatToSet, int layer = 1)
    {
        var position = VectorToIndex(positionVector);
        if (IsPositionVacant(positionVector, layer) == false) return false;
        EntityField[layer, position] = whatToSet;
        return true;
    }
    public bool IsPositionVacant(Vector2 positionVector, int layer = 1)
    {
        return EntityField[layer, VectorToIndex(positionVector)] == null;
    }
    public void RemoveEntity(Vector2 positionVector, int layer = 1)
    {
        EntityField[layer, VectorToIndex(positionVector)] = null;
    }
    public static int VectorToIndex(Vector2 vector)
    {
        var intedVec = (vector - FieldParams.LeftFieldBoundary) / FieldParams.Tile;
        return (int)intedVec.X + (int)intedVec.Y * FieldParams.ColumnsCount;
    }

    public void SpawnParticles(PackedScene particles, Vector2 position, float rotation = 0)
    {
        var emitter = particles.Instantiate<StandardParticles>();
        Instance.Particles.AddChild(emitter);
        emitter.GlobalPosition = position;
        emitter.GlobalRotation = rotation;
    }
    public void SpawnParticles(PackedScene particles, Transform2D transform)
    {
        var emitter = particles.Instantiate<StandardParticles>();
        Instance.Particles.AddChild(emitter);
        emitter.GlobalTransform = transform;
    }
}