using System;
using Hazel;

namespace Sandbox {

    public class Camera : Entity
    {
//         private TransformComponent m_Transform;
//         private RigidBody2DComponent m_Rigidbody;

        public float MoveSpeed;
        public float DistanceFromPlayer = 5;

        private Entity m_Player;

        void OnCreate()
        {
            Console.WriteLine($"Camera.OnCreate - {ID}");

            m_Player = FindEntityByName("Player");
        }


        void OnUpdate(float ts)
        {
            if(m_Player != null)
            {
                Translation = new Vector3(m_Player.Translation.XY, DistanceFromPlayer);
            }
//             Console.WriteLine($"Player.OnUpdate: {ts}");

            float speed = MoveSpeed;
            Vector3 velocity = Vector3.Zero;

            if(Input.IsKeyDown(KeyCode.UP))
                velocity.Y = 1.0f;
            else if(Input.IsKeyDown(KeyCode.DOWN))
                velocity.Y = -1.0f;

            if(Input.IsKeyDown(KeyCode.LEFT))
                velocity.X = -1.0f;
            else if(Input.IsKeyDown(KeyCode.RIGHT))
                velocity.X = 1.0f;

//             m_Rigidbody.ApplyLinearImpulse(velocity.XY * speed, Vector2.Zero, true);

            velocity *= speed;

            Vector3 translation = Translation;
            translation += velocity * ts;
            Translation = translation;
        }
    }


}