/**********************************************************************
 * Unity ECS - Test/Sample Code
 * Mitchell Pell
 * 2019.07.26
 * v0.1
 *********************************************************************/
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Entities;
using Unity.Burst;
using Unity.Collections;
using Unity.Jobs;
using Unity.Transforms;
using Unity.Mathematics;
using Unity.Rendering;
//---------------------------------------------------------------------
public class GameHandlerSpriteSheetRenderer : MonoBehaviour
{
    //Enable/Disable sprite sheet animation test
    [SerializeField] private bool   createAnimatedSpriteSheet;
    [SerializeField] private float  animationFrameTime;

    //Lazy code to get the quad mesh and sprite sheet material.
    private static  GameHandlerSpriteSheetRenderer s_instance;
    public static   GameHandlerSpriteSheetRenderer GetInstance() { return s_instance; }

    //Mesh assigned in the editor that the SpriteSheetRenderer grabs.
    public Mesh     quadMesh;
    //Sprite sheet material assigned in the editor that the SpriteSheetRenderer grabs.
    public Material spriteSheetMaterial;

    private void Awake()
    {
        /* Lazy code setting the instance of this class with quadMesh
         *  and spriteSheetMaterial defined. */
        s_instance = this;

        /* Get the Entity Manager and create a new Translation Entity
        that the SpriteSheetRenderer will use to draw the Sprite. */
        EntityManager entityManager = World.Active.EntityManager;

        if (createAnimatedSpriteSheet)
        {
            AnimatedInstancedSpriteSheetTest(entityManager);
        }
    }

    ///
    /// Animated Sprite Sprite Test using Instanced UV and the ECS system.
    ///
    private void AnimatedInstancedSpriteSheetTest(EntityManager entityManager)
    {
        EntityArchetype spriteArchType = entityManager.CreateArchetype(
            // SpriteSheetRendere
            typeof(Translation),
            // SpriteSheetAnimationSystem
            typeof(SpriteSheetAnimation_Data)
        );
        Entity sprite = entityManager.CreateEntity(spriteArchType);

        //Set
        entityManager.SetComponentData(sprite,
            new Translation
            {
                Value = new float3(0, 0, 0)
            }
        );

        //Set
        if (animationFrameTime <= 0) animationFrameTime = 0.2f;
        entityManager.SetComponentData(sprite,
            new SpriteSheetAnimation_Data
            {
                m_frameTimer = 0f,
                m_frameTimerMax = animationFrameTime,
                m_startFrameX = 0,
                m_startFrameY = 0,
                m_endFrameX = 0,
                m_endFrameY = 24,
                m_currentFrameX = 0,
                m_currentFrameY = 0,
            }
        );
    }
}