using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using Godot;
using Godot.Collections;

public partial class Common
{
	public partial class RayCast
	{
		public static PhysicsDirectSpaceState2D world;

		public Vector2 pos;

		public Node obj;

		public Shape2D shape;
	}

	public static IEnumerator Move(Node2D obj, Vector2 pos, float frameTime, bool local = false, Vector2? start = null)
	{
		start.GetValueOrDefault();
		if (!start.HasValue)
		{
			Vector2 value = (local ? obj.Position : obj.GlobalPosition);
			start = value;
		}
		for (float a = 0f; a < frameTime; a += Main.deltaTime)
		{
			if (local)
			{
				obj.Position = start.Value.Lerp(pos, a / frameTime);
			}
			else
			{
				obj.GlobalPosition = start.Value.Lerp(pos, a / frameTime);
			}
			yield return null;
		}
		if (local)
		{
			obj.Position = pos;
		}
		else
		{
			obj.GlobalPosition = pos;
		}
	}

	public static Vector2[] PosFromNode(in IList<Node2D> list)
	{
		Vector2[] array = new Vector2[list.Count];
		for (int i = 0; i < array.Length; i++)
		{
			array[i] = list[i].GlobalPosition;
		}
		return array;
	}

	public static void FillArray(ref List<int> array, in int max, in int start = 0)
	{
		array.Clear();
		for (int i = start; i < max; i++)
		{
			array.Add(i);
		}
	}

	public static void SwapType<BaseClass, TargetClass>(ref BaseClass en, in string subFolder = "", bool callReady = false) where BaseClass : Node where TargetClass : BaseClass
	{
		FieldInfo[] fields = typeof(BaseClass).GetFields();
		object[] array = new object[fields.Length];
		for (int i = 0; i < fields.Length; i++)
		{
			array[i] = fields[i].GetValue(en);
		}
		ulong instanceId = en.GetInstanceId();
		en.SetScript(GD.Load<Script>("res://Scripts/" + subFolder + typeof(TargetClass)?.ToString() + ".cs"));
		en = GodotObject.InstanceFromId(instanceId) as BaseClass;
		for (int j = 0; j < fields.Length; j++)
		{
			try
			{
				fields[j].SetValue(en, array[j]);
			}
			catch
			{
			}
		}
		if (callReady)
		{
			en._Ready();
		}
	}

	public static T[] FindChildOfType<T>(Node parent, bool includeSelf = true) where T : Node
	{
		List<T> list = new List<T>();
		if (includeSelf && parent is T item)
		{
			list.Add(item);
		}
		if (parent.GetChildCount() > 0)
		{
			foreach (Node child in parent.GetChildren())
			{
				list.AddRange(FindChildOfType<T>(child));
			}
		}
		return list.ToArray();
	}

	public static float Distance(float a, float b)
	{
		return Mathf.Abs(a - b);
	}

	public static RayCast DoRaycast(Vector2 pos, uint layers = uint.MaxValue)
	{
		return DoRaycast(pos, pos, layers);
	}

	public static RayCast DoRaycast(Vector2 pos, Vector2 end, uint layers = uint.MaxValue, Array<Rid> ignore = null)
	{
		RayCast.world = Main.instance.GetWorld2D().DirectSpaceState;
		RayCast rayCast = new RayCast();
		PhysicsRayQueryParameters2D parameters = PhysicsRayQueryParameters2D.Create(pos, end, layers, ignore);
		Dictionary dictionary = RayCast.world.IntersectRay(parameters);
		if (dictionary == null || dictionary.Count == 0)
		{
			return null;
		}
		rayCast.obj = (Node)(GodotObject)dictionary["collider"];
		rayCast.pos = (Vector2)dictionary["position"];
		rayCast.shape = (Shape2D)(GodotObject)dictionary["shape"];
		return rayCast;
	}

	public static Vector2 Beizier(Vector2 a, Vector2 b, Vector2 c, float t)
	{
		return a.Lerp(b, t).Lerp(b.Lerp(c, t), t);
	}

	public static IEnumerator Arc(Node2D obj, Vector2 start, Vector2 mid, Vector2 end, float frameTime)
	{
		for (float a = 0f; a < frameTime; a += Main.deltaTime)
		{
			obj.GlobalPosition = Beizier(start, mid, end, a / frameTime);
			yield return null;
		}
		obj.GlobalPosition = end;
	}

	public static float SinOverTime(float frequency = 1f, float variance = 0f)
	{
		return Mathf.Sin(Mathf.DegToRad((float)Time.GetTicksMsec() * frequency + variance));
	}
}