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

public partial class Student : CharacterBody2D
{
	public float Speed { get; set; } = 10.0f;
	public const float JumpVelocity = -400.0f;

	public int NextType = -1;

	private Queue<Vector2I> PathToGo = new();

	public override void _PhysicsProcess(double delta)
	{
		if (PathToGo.Count == 0)
		{
			return;// No path to follow.
		}

		Vector2 velocity = new();
		var nextPoint = PathToGo.Peek();
		if ((int)GlobalPosition.X == nextPoint.X && (int)GlobalPosition.Y == nextPoint.Y) {
			GD.Print(PathToGo.Dequeue());
		}
		nextPoint = PathToGo.Peek();
		// if ((int)GlobalPosition.X == nextPoint.X) {
		// 	// Move Y
		// 	// velocity.Y = Math.Max(Speed, Math.Abs(nextPoint.Y - GlobalPosition.Y));
		// 	velocity.Y = Speed;
		// 	if (GlobalPosition.Y > nextPoint.Y) {
		// 		velocity.Y = -velocity.Y;
		// 	}
		// } else if ((int)GlobalPosition.Y == nextPoint.Y) {
		// 	// move X
		// 	// velocity.X = Math.Max(Speed, Math.Abs(nextPoint.X - GlobalPosition.X));
		// 	velocity.X = Speed;
		// 	if (GlobalPosition.X > nextPoint.X) {
		// 		velocity.X = -velocity.X;
		// 	}
		// }
		if ((int)GlobalPosition.X == nextPoint.X) {
			// Move Y
			// velocity.Y = Math.Max(Speed, Math.Abs(nextPoint.Y - GlobalPosition.Y));
			velocity.Y = Speed;
			if (GlobalPosition.Y > nextPoint.Y) {
				velocity.Y = -velocity.Y;
			}
		} else if ((int)GlobalPosition.Y == nextPoint.Y) {
			// move X
			// velocity.X = Math.Max(Speed, Math.Abs(nextPoint.X - GlobalPosition.X));
			velocity.X = Speed;
			if (GlobalPosition.X > nextPoint.X) {
				velocity.X = -velocity.X;
			}
		}
		GlobalPosition =  GlobalPosition with {
			X = GlobalPosition.X + velocity.X,
			Y = GlobalPosition.Y + velocity.Y
		};

		// Velocity = velocity;
		MoveAndSlide();
	}

	public override void _Ready()
	{
		base._Ready();
		var bt = GetNode<BTPlayer>("BTPlayer");
		var bb = bt.Blackboard;
		// bb.BindVarToProperty("Stayed", this, "Speed");
		// GD.Print(bb.GetVar("Stayed"));
		// GD.Print($"Speed: {Speed}");
		var ap = GetNode<AnimationPlayer>("AnimationPlayer");
		ap.Autoplay = "idle_front";
		ap.Play("idle_front");
	}

	public void MoveFollowPath(List<Vector2I> path)
	{
		foreach (var p in path)
		{
			PathToGo.Enqueue(new Vector2I(p.X * 80 + 40, p.Y * 80 + 120));
		}
	}

	public void GoTo(int nType) {
		GD.Print($"Called with nType = {nType}");
		var lab = GetParentOrNull<Lab>();
		if (lab == null) {
			return;
		}
		var block = lab.GetTypedBlock((Lab.MapNodeType)nType, GD.Randi());
		MoveFollowPath(lab.GetShortestPath(lab.Point2Coord(GlobalPosition), block));
		randomChangeBody();
	}

	private void randomChangeBody() {
		uint bodyId = GD.Randi() % 9 + 1;
		var body = GetNode<Sprite2D>("parts/body");
		var rp = GetNode<ResourcePreloader>("ResourcePreloader");
		body.Texture = (Texture2D)rp.GetResource($"Body_48x48_0{bodyId}");
	}
}