using Godot;
using System;
using System.Collections.Generic;
using BITKit;
using Newtonsoft.Json.Linq;

namespace BITFactory;
public partial class PathRenderer : EntityBehaviour
{
	[Export] private DeviceValueComponent valueComponent;
	[Export] private Node3D root;
	
	private readonly List<MeshInstance3D> meshInstances=new();
	public override void OnAwake()
	{
		base.OnAwake();
		valueComponent.OnValueChanged += OnValueChanged;
	}

	private void OnValueChanged(string arg1, DateTime arg2)
	{
		foreach (var x in meshInstances)
		{
			x.QueueFree();
		}
		meshInstances.Clear();
		Vector3 lastPoint = Vector3.Zero;
		foreach (var pair in JArray.Parse(arg1))
		{
			var x = pair["X"]!.ToObject<float>()!;
			var y = pair["Y"]!.ToObject<float>()!;
			var currentPoint =root.Position + new Vector3(x, 0, y);
			if (lastPoint != Vector3.Zero)
			{
				meshInstances.Add(Line(lastPoint, currentPoint,Colors.Orange));
			}
			lastPoint = currentPoint;
		}
	}
	
	public static MeshInstance3D Line(Vector3 pos1, Vector3 pos2, Color? color = null)
	{
		var meshInstance = new MeshInstance3D();
		var immediateMesh = new ImmediateMesh();
		var material = new StandardMaterial3D();

		meshInstance.Mesh = immediateMesh;
		meshInstance.CastShadow = GeometryInstance3D.ShadowCastingSetting.Off;
		
		immediateMesh.SurfaceBegin(Mesh.PrimitiveType.Lines, material);
		immediateMesh.SurfaceAddVertex(pos1);
		immediateMesh.SurfaceAddVertex(pos2);
		immediateMesh.SurfaceEnd();

		material.ShadingMode = BaseMaterial3D.ShadingModeEnum.Unshaded;
		material.AlbedoColor = color ?? Colors.WhiteSmoke;

		(Engine.GetMainLoop() as SceneTree).Root.AddChild(meshInstance);

		return meshInstance;
	}
}