using System;

namespace DesertPaintCodex.Models
{
    public class PaintColor
    {
        private const byte  LightTextValueCutoff = 150;
        private const float RedIntensity   = 0.299f;
        private const float GreenIntensity = 0.587f;
        private const float BlueIntensity  = 0.114f;

        public byte Red { get; set; }
        public byte Blue { get; set; }
        public byte Green { get; set; }
        public string Name { get; private set; }

        public bool UseWhiteText => Red * RedIntensity + Green * GreenIntensity + Blue * BlueIntensity < LightTextValueCutoff;
        
        public PaintColor()
        {
            Name  = "Undefined";
            Red   = 0;
            Green = 0;
            Blue  = 0;
        }

        public PaintColor(string name, string hexRed, string hexGreen, string hexBlue)
        {
            Name = name;
            Red =   byte.Parse(hexRed,   System.Globalization.NumberStyles.AllowHexSpecifier);
            Green = byte.Parse(hexGreen, System.Globalization.NumberStyles.AllowHexSpecifier);
            Blue =  byte.Parse(hexBlue,  System.Globalization.NumberStyles.AllowHexSpecifier);
        }

        public PaintColor(byte red, byte green, byte blue)
        {
            Name  = "Undefined";
            Red   = red;
            Green = green;
            Blue  = blue;
        }

        public PaintColor(PaintColor other)
        {
            Name  = other.Name;
            Red   = other.Red;
            Green = other.Green;
            Blue  = other.Blue;
        }

        public int GetDistanceSquared(PaintColor otherColor)
        {
            return (int)(Math.Pow(Red - otherColor.Red, 2) +
                Math.Pow(Green - otherColor.Green, 2) +
                Math.Pow(Blue - otherColor.Blue, 2));
        }

        public void Clear()
        {
            Red   = 0;
            Green = 0;
            Blue  = 0;
        }

        public void Set(PaintColor other)
        {
            Red   = other.Red;
            Green = other.Green;
            Blue  = other.Blue;
            Name  = other.Name;
        }

        public string ToHexString()
        {
            return "#" + Red.ToString("X2") + Green.ToString("X2") + Blue.ToString("X2");
        }

        public override string ToString()
        {
            return "[" + Name + ", " + Red + ", " + Green + ", " + Blue + "]";
        }
    }
}