using HidSharp;
using System;
using System.Diagnostics;

namespace DreamCheekyUSB
{
    public abstract class LEDBase : IDisposable
    {
        /// <summary>
        /// HidLibray.HidDevice for this USBLED instance
        /// </summary>
        public HidDevice HidLED;
        internal HidStream Stream;
        internal HidDeviceLoader Loader;
        internal bool initialized = false;

        internal virtual bool Initialize()
        { //Should be extended by base classes
            if (initialized)
            {
                return true;
            }
            if (HidLED == null)
            {
                throw new NullReferenceException("hidLED not initialized");
            }
            Stream = HidLED.Open();
            initialized = true;
            return true;
        }

        public void Dispose()
        {
            Trace.WriteLine("Releasing control of USB device...");
            if (Stream != null)
            {
                Stream.Close();
                Stream.Dispose();
                Stream = null;
            }
        }

        public abstract bool Write(byte[] data);

        public abstract bool SetColor(System.Drawing.Color color);

        public abstract bool SetColor(byte red, byte green, byte blue);

        /// <summary>
        /// Accepts rgb value as a string in xxx,xxx,xxx format. Will convert to byte values.
        /// </summary>
        /// <param name="rgb">Example: 255,255,0 for Yellow</param>
        /// <returns>True if success, False otherwise.</returns>
        public bool SetColor(string rgb)
        {
            try
            {
                var rxRGB = System.Text.RegularExpressions.Regex.Match(rgb, "^([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5]),([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5]),([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])$");
                if (rxRGB.Success)
                {
                    byte red = byte.Parse(rxRGB.Groups[1].Value);
                    byte green = byte.Parse(rxRGB.Groups[2].Value);
                    byte blue = byte.Parse(rxRGB.Groups[3].Value);
                    return SetColor(red, green, blue);
                }

                System.Diagnostics.Trace.WriteLine("Invalid RGB string: " + rgb);
                return false;
            }
            catch (Exception ex)
            {
                System.Diagnostics.Trace.WriteLine("Error in SetColor: " + ex.Message);
                return false;
            }
        }

        public bool Off()
        {
            return SetColor(0, 0, 0);
        }

        /// <summary>
        /// Cycle Red, Green, Blue, then fade Red, Green Blue
        /// </summary>
        /// <returns></returns>
        public virtual bool Test()
        {
            bool bReturn = true;
            bReturn &= SetColor(255, 0, 0);
            System.Threading.Thread.Sleep(250);
            bReturn &= SetColor(0, 255, 0);
            System.Threading.Thread.Sleep(250);
            bReturn &= SetColor(0, 0, 255);
            System.Threading.Thread.Sleep(250);
            bReturn &= Off();
            System.Threading.Thread.Sleep(250);
            bReturn &= FadeInOut(System.Drawing.Color.Red, 1000);
            System.Threading.Thread.Sleep(100);
            bReturn &= FadeInOut(System.Drawing.Color.Green, 1000);
            System.Threading.Thread.Sleep(100);
            bReturn &= FadeInOut(System.Drawing.Color.Blue, 1000);
            return bReturn;
        }

        public virtual bool TestBlink()
        {
            bool bReturn = true;
            bReturn &= Blink(System.Drawing.Color.Red);
            //bReturn &= Blink(System.Drawing.Color.Orange);
            //bReturn &= Blink(System.Drawing.Color.Yellow);
            //bReturn &= Blink(System.Drawing.Color.Green);
            //bReturn &= Blink(System.Drawing.Color.Blue);
            //bReturn &= Blink(System.Drawing.Color.Indigo);
            //bReturn &= Blink(System.Drawing.Color.Violet);
            return Off() && bReturn;
        }
        public virtual bool TestBlinkViolet()
        {
            bool bReturn = true;
            bReturn &= Blink(System.Drawing.Color.Violet);
            return Off() && bReturn;
        }
        public virtual bool TestBlinkYellow()
        {
            bool bReturn = true;
            bReturn &= Blink(System.Drawing.Color.Violet);
            return Off() && bReturn;
        }
        public virtual bool TestBlinkGreen()
        {
            bool bReturn = true;
            bReturn &= Blink(System.Drawing.Color.Violet);
            return Off() && bReturn;
        }
        public bool FadeInOut(System.Drawing.Color toColor, int totalMs = 2000)
        {
            if (totalMs <= 0)
            {
                throw new ArgumentOutOfRangeException("totalMs", "must be greater than zero");
            }
            FadeIn(toColor, totalMs / 2);
            return FadeOut(toColor, totalMs / 2);
        }

        public void FadeIn(System.Drawing.Color toColor, int totalMs = 1000)
        {
            if (totalMs <= 0)
            {
                throw new ArgumentOutOfRangeException("totalMs", "must be greater than zero");
            }
            int t = 0;
            const int step = 35;
            float ratio;
            while (t < totalMs)
            {
                System.Threading.Thread.Sleep(step);
                ratio = (float)t / (float)totalMs;
                byte red = (byte)(toColor.R * ratio);
                byte green = (byte)(toColor.G * ratio);
                byte blue = (byte)(toColor.B * ratio);
                SetColor(red, green, blue);
                t += step;
            }
        }

        public bool FadeOut(System.Drawing.Color fromColor, int totalMs = 1000)
        {
            if (totalMs <= 0)
            {
                throw new ArgumentOutOfRangeException("totalMs", "must be greater than zero");
            }
            var t = 0;
            const int step = 35;
            float ratio;
            while (t < totalMs)
            {
                System.Threading.Thread.Sleep(step);
                ratio = (float)t / (float)totalMs;
                byte red = (byte)(fromColor.R - (fromColor.R * ratio));
                byte green = (byte)(fromColor.G - (fromColor.G * ratio));
                byte blue = (byte)(fromColor.B - (fromColor.B * ratio));
                SetColor(red, green, blue);
                t += step;
            }
            return Off();
        }

        public bool Blink(System.Drawing.Color color, int count = 1, int blinkMs = 500)
        {
            if (count <= 0)
            {
                throw new ArgumentOutOfRangeException("count", "Count cannot be less than zero");
            }
            if (blinkMs <= 0)
            {
                throw new ArgumentOutOfRangeException("blinkMs", "BlinkMs cannot be less than zero");
            }

            int i = 0;
            bool bReturn = true;
            while (i < count)
            {
                bReturn &= FadeInOut(color, blinkMs);
                i++;
            }
            return bReturn;
        }

        public bool TryParseNametoColor(string name, out System.Drawing.Color result)
        {
            result = System.Drawing.Color.FromName(name);
            if (result.IsKnownColor || result.IsSystemColor)
            {
                return true;
            }

            return false;
        }
    }
}