using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using System.Threading.Tasks;
using ImageSharp;
using ImageSharp.Drawing;
using ImageSharp.PixelFormats;
using ImageSharp.Processing;
using SixLabors.Fonts;
using Font = SixLabors.Fonts.Font;
using FontFamily = SixLabors.Fonts.FontFamily;
using FontStyle = SixLabors.Fonts.FontStyle;
using Image = ImageSharp.Image;


namespace CatalogLib
{
    public class ImgSharpCreator : IImageProcessor
    {
        private FileInfo _currentFile;
        public void Start(FileInfo workFile)
        {
            _currentFile = workFile;



            using (Image<Rgba32> image = Image.Load(workFile.FullName)/* new Image(workFile.FullName)*/)
            {
                //image.Rotate(-90);

                if (PicSettings.Instance.GeneraleRotazioneAutomatica)
                {
                    image.AutoOrient();

                    //var exif = image.MetaData.ExifProfile;
                    //if (exif != null)
                    //{
                    //    var o = exif.GetValue(ExifTag.Orientation);
                    //    if (o != null)
                    //    {
                    //        var v = (ushort)o.Value;



                    //        switch (v)
                    //        {


                    //            //1 = Horizontal(normal)
                    //            //2 = Mirror horizontal
                    //            //3 = Rotate 180
                    //            //4 = Mirror vertical
                    //            //5 = Mirror horizontal and rotate 270 CW
                    //            //6 = Rotate 90 CW
                    //            //7 = Mirror horizontal and rotate 90 CW
                    //            //8 = Rotate 270 CW
                    //            case 1:
                    //                break;
                    //            case 2:
                    //                image.Flip(FlipType.Horizontal);
                    //                break;
                    //            case 3:
                    //                //image.Rotate(180f);

                    //                //image.Rotate(90);
                    //                image.Rotate(RotateType.Rotate180);
                    //                break;
                    //            case 4:
                    //                image.Flip(FlipType.Vertical);
                    //                break;
                    //            case 5:
                    //                image.RotateFlip(RotateType.Rotate270, FlipType.Horizontal);
                    //                break;
                    //            case 6:
                    //                image.Rotate(RotateType.Rotate90);
                    //                break;
                    //            case 7:
                    //                image.RotateFlip(RotateType.Rotate90, FlipType.Horizontal);
                    //                break;
                    //            case 8:
                    //                //image.Rotate(-90);
                    //                image.Rotate(RotateType.Rotate270);

                    //                image.MetaData.ExifProfile.SetValue(ExifTag.Orientation, new ExifValue(exif.GetValue(ExifTag.Orientation)).Value = (ushort)1);
                    //                break;


                    //        }
                    //    }
                    //}

                }

                if (PicSettings.Instance.EnableText)
                {
                    SetExtraText(image);
                }

                //JpegDecoder j = new JpegDecoder();
                var va = Vector.IsHardwareAccelerated;

                //image.Resize(PicSettings.Instance.FotoLarghezza, PicSettings.Instance.FotoAltezza);

                //image.Resize(2240, 2240);
                //var fff = FontCollection.SystemFonts.Find(PicSettings.Instance.NomeFont);
                //var font = new Font(fff, (float)PicSettings.Instance.DimensioneFont, FontStyle.Regular);
                //image.DrawText("sssssssssssssssssssssssssssssssssssssssssssssss", font, Color.Black, new Vector2(200, 200));
                image.Save(Path.Combine(PicSettings.Instance.DirectoryDestinazione, workFile.Name));
                //image.Resize(200, 200).Save("");
            }

        }

        private void SetExtraText(Image<Rgba32> image)
        {
            if (string.IsNullOrWhiteSpace(PicSettings.Instance.TestoApplicareOrizzontale))
            {
                Debug.WriteLine($"{_currentFile.Name} No text");
                return;
            }


            var fo = SixLabors.Fonts.SystemFonts.Find(PicSettings.Instance.NomeFont);


            //var fff = FontCollection.SystemFonts.Find(PicSettings.Instance.NomeFont);
            //var fff = FontCollection.SystemFonts.Find("Segoe Print");

            var font = new Font(fo, (float)PicSettings.Instance.DimensioneFont, FontStyle.Regular);
            //var font = new Font(fff, 8f, FontStyle.Regular);


            //Color c = Color.FromHex(FlipRgbString(PicSettings.Instance.ColoreTestoRGB));
            Rgba32 g = Rgba32.FromHex(FlipRgbString(PicSettings.Instance.ColoreTestoRGB));
            //TextMeasurer measurer = new TextMeasurer();

            //var size = measurer.MeasureText(PicSettings.Instance.TestoApplicareOrizzontale, font, 72);
            //float scalingFactor = Math.Min(image.Width / size.Width, image.Height / size.Height);
            //Font scaledFont = new Font(font, scalingFactor * font.Size);

            //image.DrawText(PicSettings.Instance.TestoApplicareOrizzontale, scaledFont, g, new Vector2(0, 0));

            Vector2 center = new Vector2(image.Width / 2, image.Height / 2); //center horizontally, 10px down 

            var size = TextMeasurer.Measure(PicSettings.Instance.TestoApplicareOrizzontale, new RendererOptions(font));
            float scalingFactor = Math.Min(image.Width / size.Width, image.Height / size.Height);
            Font scaledFont = new Font(font, scalingFactor * font.Size);


            image.DrawText(PicSettings.Instance.TestoApplicareOrizzontale, scaledFont, g, center, new TextGraphicsOptions(true) { HorizontalAlignment = HorizontalAlignment.Center, VerticalAlignment = VerticalAlignment.Bottom });


        }

        private void WriteTextFixed(Image<Rgba32> image)
        {
            var fo = SixLabors.Fonts.SystemFonts.Find("Microsoft Sans Serif");
            var font = new Font(fo, 8, FontStyle.Regular);
            Rgba32 g = Rgba32.FromHex("#FF00FFFF");
            Vector2 center = new Vector2(image.Width / 2, image.Height / 2);
            var size = TextMeasurer.Measure("Test test test test test", new RendererOptions(font));
            float scalingFactor = Math.Min(image.Width / size.Width, image.Height / size.Height);
            Font scaledFont = new Font(font, scalingFactor * font.Size);
            image.DrawText("Test test test test test", scaledFont, g, center, new TextGraphicsOptions(true) { HorizontalAlignment = HorizontalAlignment.Center, VerticalAlignment = VerticalAlignment.Bottom });
        }

        private string FlipRgbString(string originalString)
        {
            string s;
            if (originalString.Length == 7)
            {
                s = string.Concat("#", originalString.Substring(1, 6));
            }
            else
            {
                s = string.Concat("#", originalString.Substring(3, 6), originalString.Substring(1, 2));
            }


            return s;
        }
    }
}