using UnityEngine;

namespace cylvester
{
    public class SpectrumGeneratorEditMode : SpectrumGenerator, ISpectrumGenerator
    {

        private Color32[] resetColorArray;

        public SpectrumGeneratorEditMode(int textureWidth, int textureHeight) 
            : base(textureWidth,textureHeight)
        {
            //generate empty texture
            Color32 resetColor = new Color32(0, 0, 0, 64); //black with alpha
            resetColorArray = Spectrum.GetPixels32();
            for (int i = 0; i < resetColorArray.Length; i++)
            {
                resetColorArray[i] = resetColor;
            }
        }
  
        public int Update(Rect selectionRect)
        {
            /*
            OnAllPixels((x, y) =>
            {
                var color = Color.black;
                if (IsInSelection(x, y, ref selectionRect))
                    color.a = 1f;
                else
                    color.a = 0.2f;
                Spectrum.SetPixel(x, y, color);
            });
            Spectrum.Apply();

            */
            Spectrum.SetPixels32(resetColorArray); // Reset all pixels color
            var rectcolor = Color.red;
            //Draw selection Rectangle border
            for (int i = (int)selectionRect.x; i < (selectionRect.x + (selectionRect.width - 1)); i++) //horizontal lines
            {
                Spectrum.SetPixel(i, (int)(Spectrum.height - selectionRect.y - (selectionRect.height - 1)), rectcolor); //end line
                Spectrum.SetPixel(i, (int)(Spectrum.height - selectionRect.y), rectcolor); //start line
            }
            for (int i = (int)(Spectrum.height - selectionRect.y - (selectionRect.height - 1)); i < (int)(Spectrum.height - selectionRect.y); i++) //vertical lines
            {
                Spectrum.SetPixel((int)selectionRect.x, i, rectcolor); // line left
                Spectrum.SetPixel((int)(selectionRect.x + (selectionRect.width - 1)), i, rectcolor); // line right
            }

            Spectrum.Apply();

            return 0;
        }
    }

}