using Duality;
using Duality.Components;
using Duality.Components.Renderers;
using Duality.Resources;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace BackGroundScroller_Example
{

     [RequiredComponent(typeof(Camera))]

     //LevelHandler is used for maintaining anything level related like backgrounds (tileMaps, character- and objectspawner in future)
     public class LevelHandler : Component, ICmpUpdatable
    {
        
        // Basicspeed-Multiplikator of the current ground (speed the ground should be multiplied with)
        // [1 = basic, in the scroller defined speed]
        private float horSpeedMultiplicator;
        private float horSpeed;
        private Camera mainCamera;

        public Camera MainCamera
        {
            get { return this.mainCamera; }
            set { this.mainCamera = value; }
        }
        
        public float CamSpeedMultiplier
        {
            get { return this.horSpeedMultiplicator; }
            set { this.horSpeedMultiplicator = value; }
        }
        public float CamSpeed
        {
            get { return this.horSpeed; }
            set { this.horSpeed = value; }
        }

        private BackgroundScroller bgScroller;
        
        public BackgroundScroller BackgroundScroller
        {
            get { return this.bgScroller; }
            set { this.bgScroller = value; }
        }

        public void OnUpdate()
        {
            
            if(DualityApp.Keyboard.KeyPressed(Duality.Input.Key.D))
            {
                Vector3 deltaPos = new Vector3();

                deltaPos.X = CamSpeed * horSpeedMultiplicator;
                deltaPos.X *= Time.MsPFMult * Time.TimeMult / 1000;

                MainCamera.GameObj.Transform.MoveBy(deltaPos);
            }

            if (DualityApp.Keyboard.KeyPressed(Duality.Input.Key.A))
            {
                Vector3 deltaPos = new Vector3();

                deltaPos.X = -CamSpeed;
                deltaPos.X *= Time.MsPFMult * Time.TimeMult / 1000;

                MainCamera.GameObj.Transform.MoveBy(deltaPos);
            }

            //Calls update-logic of the scroller to generate and move the different layers
            //At this point a logic to change the defined prefabs can be introduced to enable a dynamic layer change
            this.bgScroller.Update(horSpeed, mainCamera);
        }
    }
}