//-----------------------------------------------------------------------
// <copyright file="PaletteCreator.cs" company="bedug.com">
//     Copyright © 2012 Nils Hammar. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
/*
 * Software to access vehicle information via the OBD-II connector.
 * 
 * Copyright © 2012 Nils Hammar
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Alternative licensing is possible, see the licensing document.
 * 
 * The above text may not be removed or modified.
 */

namespace Gauges.TelltalePanel
{
    using System.Drawing;
    using System.Drawing.Imaging;

    /// <summary>
    /// Create palettes for icons to allow for an easy way to get flashing icons.
    /// </summary>
    public class PaletteCreator
    {
        /// <summary>
        /// Primary color list, flash 'on'.
        /// </summary>
        private static readonly Color[] cols1 = new Color[]
        {
            Color.Transparent,
            Color.Black,
            Color.Red,
            Color.Gold,
            Color.LimeGreen,
            Color.Blue,
            Color.Magenta,
            Color.White,
            Color.Transparent,
            Color.Black,
            Color.Red,
            Color.Gold,
            Color.LimeGreen,
            Color.Blue,
            Color.Magenta,
            Color.White,
        };

        /// <summary>
        /// Secondary color list, flash 'off'.
        /// </summary>
        private static readonly Color[] cols2 = new Color[]
        {
            Color.Transparent,
            Color.Black,
            Color.Red,
            Color.Gold,
            Color.LimeGreen,
            Color.Blue,
            Color.Magenta,
            Color.White,
            Color.Black,
            Color.Black,
            Color.Black,
            Color.Black,
            Color.Black,
            Color.Black,
            Color.Black,
            Color.Black,
        };

        /// <summary>
        /// Gets Palette for flash 'on'.
        /// </summary>
        public ColorPalette paletteFlashOn { get; private set; }

        /// <summary>
        /// Gets Palette for flash 'off'.
        /// </summary>
        public ColorPalette paletteFlashOff { get; private set; }

        /// <summary>
        /// Initializes a new instance of the <see cref="PaletteCreator" /> class.
        /// </summary>
        public PaletteCreator()
        {
            using (Bitmap bmpZ = new Bitmap(16, 16, System.Drawing.Imaging.PixelFormat.Format8bppIndexed))
            {
                this.paletteFlashOn = bmpZ.Palette;
                this.paletteFlashOff = bmpZ.Palette;

                for (int i = 0; i < cols1.Length; i++)
                {
                    this.paletteFlashOn.Entries[i] = cols1[i];
                }

                for (int i = 0; i < cols2.Length; i++)
                {
                    this.paletteFlashOff.Entries[i] = cols2[i];
                }
            }
        }

        /// <summary>
        /// Get the color index of a given color.
        /// </summary>
        /// <param name="color">Color to get index for.</param>
        /// <param name="flash">'true' if the color shall be flashing.</param>
        /// <returns>Color index value.</returns>
        public static byte getColorIndex(Color color, bool flash)
        {
            byte ix = 0;

            foreach (Color col in cols1)
            {
                if (col.Equals(color))
                {
                    break;
                }

                ix++;
            }

            // Default to index for Flashing white if color not found.
            if (ix == cols1.Length)
            {
                ix = 15;
            }

            if (flash)
            {
                ix |= 0x08;
            }

            return ix;
        }
    }
}