using SkiaSharp;

namespace MyDarling.Services
{
    public class ImageResizer : IImageResizer
	{
		const int size = 400;
		const int quality = 75;
		public void CreateThumbnail(string inputPath)
		{
			using var input = File.OpenRead(inputPath);
			using var inputStream = new SKManagedStream(input);
			using var original = SKBitmap.Decode(inputStream);

			int width, height;
			if (original.Width > original.Height)
			{
				width = size;
				height = original.Height * size / original.Width;
			}
			else
			{
				width = original.Width * size / original.Height;
				height = size;
			}

			using var resized = original.Resize(new SKImageInfo(width, height), SKFilterQuality.High);
			if (resized == null) return;

			using var image = SKImage.FromBitmap(resized);
			var outputPath = Path.GetDirectoryName(inputPath) + "\\" +
				Path.GetFileNameWithoutExtension(inputPath) + "_thumb.jpg";
			using var output = File.OpenWrite(outputPath);

			image.Encode(SKEncodedImageFormat.Jpeg, quality).SaveTo(output);
		}

		public void DownsizeImage(string filePath)
		{
			throw new NotImplementedException();
		}
	}
}