using Godot;
using System;

public partial class SandboxPlayer : CharacterBody3D
{

	[Export]
	public float Speed = 5.0f;
	[Export]
	public float JumpVelocity = 4.5f;

	// Get the gravity from the project settings to be synced with RigidBody nodes.
	public float gravity = ProjectSettings.GetSetting("physics/3d/default_gravity").AsSingle();

	private float camera_anglev = 0;
	private Camera3D cam;

	public override void _Ready() {
		cam = GetChild<Camera3D>(3, true);
	}


	public static float ToRadians (float degrees) {
		// Angle in 10th of a degree
		return (float)((degrees * Math.PI)/180.0f);
	}

	public override void _Input(InputEvent @event) {
		if (@event is InputEventMouseMotion) {
			var M = (InputEventMouseMotion)@event;
			cam.RotateY(ToRadians(-M.Relative.X * 0.3f));
			var changeV = -M.Relative.Y * 0.3f;
			if (camera_anglev + changeV > -50 && camera_anglev + changeV < 50) {
				camera_anglev += changeV;
				cam.RotateX(ToRadians(changeV));
			}
			GetViewport().SetInputAsHandled();
		}
	}

	public override void _PhysicsProcess(double delta) {
		Vector3 velocity = Velocity;

		// Add the gravity.
		if (!IsOnFloor())
			velocity.Y -= gravity * (float)delta;

		// Handle Jump.
		if (Input.IsActionJustPressed("jump") && IsOnFloor())
			velocity.Y = JumpVelocity;

		// Get the input direction and handle the movement/deceleration.
		// As good practice, you should replace UI actions with custom gameplay actions.
		Vector2 inputDir = Input.GetVector("move_left", "move_right", "move_forward", "move_back");;
		Vector3 direction = (Transform.Basis * new Vector3(inputDir.X, 0, inputDir.Y)).Normalized();
		if (direction != Vector3.Zero)
		{
			velocity.X = direction.X * Speed;
			velocity.Z = direction.Z * Speed;
		}
		else
		{
			velocity.X = Mathf.MoveToward(Velocity.X, 0, Speed);
			velocity.Z = Mathf.MoveToward(Velocity.Z, 0, Speed);
		}

		Velocity = velocity;
		MoveAndSlide();
	}
}