using Godot;

public partial class PlantField : Node2D
{
    private Sprite2D _plantSetter;
    private readonly Vector2 tile = new Vector2(Utility.TileWidth, Utility.TileHeight);
    private bool _canPlace;
    [Export]
    private PlantResource _plant;
    public override void _Ready()
    {
        LevelController.Instance.PlantField = this;
        _plantSetter = GetChild<Sprite2D>(0);
    }

    public override void _Process(double delta)
    {
        // Getting and storing global mouse position, setting plant-poiner to it
        var mouse_pos = GetGlobalMousePosition();
        _plantSetter.GlobalPosition = mouse_pos;

        // Getting position in grid coordinates
        var expected_pos = (_plantSetter.GlobalPosition / tile).Ceil() * tile - new Vector2(20, 14);

        // Checking for boundaries
        bool inBoundary = expected_pos.X > Utility.LeftFieldBoundary.X && expected_pos.X < Utility.RightFieldBoundary.X && expected_pos.Y > Utility.LeftFieldBoundary.Y && expected_pos.Y < Utility.RightFieldBoundary.Y;
        
        // Setting visuals
        if (_plant != null && inBoundary)
        {
            _canPlace = true;
            Material.Set("shader_parameter/amount", 0);
            Cursor.Instance.SetPlantCursor();
            _plantSetter.GlobalPosition = expected_pos;
        }
        else
        {
            _canPlace = false;
            Cursor.Instance.SetDefaultCursor();
            Material.Set("shader_parameter/amount", 1);
        }

        // Spawning plant
        if (Input.IsMouseButtonPressed(MouseButton.Left) && _canPlace)
        {
            
            var plant = _plant.Scene.Instantiate<Node2D>();
            LevelController.Instance.Pools.Plants.AddChild(plant);
            plant.GlobalPosition = expected_pos;
        }
    }
}