using System;
using System.Diagnostics;
using System.Drawing;
using PKHeX.Core;
using PKHeX.Drawing;

namespace PKHeX.WinForms
{
    public static class CGearExtensions
    {
        public static Bitmap GetBitmap(CGearBackground bg)
        {
            return ImageUtil.GetBitmap(bg.GetImageData(), CGearBackground.Width, CGearBackground.Height);
        }

        public static CGearBackground GetCGearBackground(Bitmap img)
        {
            const int Width = CGearBackground.Width;
            const int Height = CGearBackground.Height;
            if (img.Width != Width)
                throw new ArgumentException($"Invalid image width. Expected {Width} pixels wide.");
            if (img.Height != Height)
                throw new ArgumentException($"Invalid image height. Expected {Height} pixels high.");

            // get raw bytes of image
            byte[] data = ImageUtil.GetPixelData(img);
            const int bpp = 4;
            Debug.Assert(data.Length == Width * Height * bpp);

            return CGearBackground.GetBackground(data, bpp);
        }
    }
}