using Godot;
using Godot.Collections;

public partial class Floor : TileMapLayer
{
    [Export] public Mob MovementTarget { get; set; }
    [Export] public float MovementSpeed { get; set; }

    private RemotePathFollow2D _movementPathNode = null;
    
    private AStarGrid2D _directionFinder;

    public override void _Ready()
    {
        base._Ready();

        MovementTarget.RequestMovement += _HandleMoveRequest;

        _directionFinder = new AStarGrid2D();
        _directionFinder.Region = GetUsedRect();
        _directionFinder.Update();

        Array<Vector2I> path = _directionFinder.GetIdPath(GetUsedRect().Position, GetUsedRect().Position + new Vector2I(5, 3));
        Line2D line = new Line2D();
        line.ZIndex = 5;
        foreach (Vector2I point in path)
        {
            line.AddPoint(MapToLocal(point));
        }
        //AddChild(line);
    }

    public override void _Process(double delta)
    {
        base._Process(delta);

        if (_movementPathNode is { Finished: true })
        {
            _movementPathNode.QueueFree();
            _movementPathNode = null;
        }
    }

    private void _HandleMoveRequest(Vector2I direction)
    {
        
        if (direction == Vector2I.Zero || _movementPathNode != null)
        {
            return;
        }
        _movementPathNode = new RemotePathFollow2D(MovementTarget, MovementSpeed);
        _movementPathNode.Curve = _curveToPoint(MapToLocal(direction) - MapToLocal(Vector2I.Zero));
        _movementPathNode.Start();
        
        AddChild(_movementPathNode);
    }

    private Curve2D _curveToPoint(Vector2 point)
    {
        Curve2D curve = new Curve2D();
        curve.AddPoint(Vector2.Zero);
        curve.AddPoint(point);
        return curve;
    }
}