using Sandbox;
using System;
using System.Numerics;

public sealed class CameraMovement : Component
{
	// Properties
	[Property] public GudeMovement Player { get; set; }
	[Property] public GameObject Head { get; set; }
	[Property] public float Distance { get; set; } = 300f;
	[Property] public Vector3 CameraOffset { get; set; } = new Vector3(0, 0, 90);

	[Property] public GameObject Body; //will reference the player game object's position

	//[Property] public Vector3 CameraOffset { get; set; } = new Vector3( 300f, 0f, 155f ); //will set the offset position from the player to the camera

	// Variables
	public bool IsFirstPerson => Distance == 0f; // Helpful but not required. You could always just check if Distance == 0f
	private CameraComponent Camera;
	
	protected override void OnAwake()
	{
		//calculate the offset position between the camera and the player at the start of the game
		// it subtracts the player's position from the camera's
		//CameraOffset = WorldPosition - Body.WorldPosition;

		Camera = Components.Get<CameraComponent>();

	}
	
	
	protected override void OnUpdate()
	{
		//sets the camera to where the player is plus the offset set above
		//WorldPosition = Body.WorldPosition + CameraOffset;

		//Rotate the head based on mouse movement
		var eyeAngles = Head.WorldRotation.Angles();
		eyeAngles.pitch += Input.MouseDelta.y * 0.1f;
		eyeAngles.yaw -= Input.MouseDelta.x * 0.1f;
		eyeAngles.roll = 0f;
		eyeAngles.pitch = eyeAngles.pitch.Clamp( -89.9f, 89.9f );
		Head.WorldRotation = eyeAngles.ToRotation();

		Head.WorldPosition = Body.WorldPosition + CameraOffset;

		if ( Camera is not null )
		{
			var camPos = Head.WorldPosition;
			if ( !IsFirstPerson )
			{
				// Perform a trace backwards to see where we can safely place the camera
				var camForward = eyeAngles.ToRotation().Forward;
				var camTrace = Scene.Trace.Ray( camPos, camPos - (camForward * Distance) )
					.WithoutTags( "player", "trigger" )
					.Run();

				if(camTrace.Hit)
				{
					camPos = camTrace.HitPosition + camTrace.Normal;
				}
				else
				{
					camPos = camTrace.EndPosition;
				}
			}

			// Set the position of the camera to our calculated position
			Camera.WorldPosition = camPos;
			Camera.WorldRotation = eyeAngles.ToRotation();

		}

	

	}
}