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.PixelFormats;
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)*/)
            {
                if (PicSettings.Instance.UsaRotazioneAutomatica)
                {


                    var exif = image.MetaData.ExifProfile;
                    if (exif != null)
                    {
                        var o = exif.GetValue(ExifTag.Orientation);
                        if (o != null)
                        {
                            int v = (int)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:
                                    break;
                                case 3:
                                    //image.Rotate(180f);

                                    //image.Rotate(90);
                                    image.Rotate(180f);
                                    break;
                                case 4:
                                    break;
                                case 5:
                                    break;
                                case 6:
                                    image.Rotate(90);
                                    break;
                                case 7:
                                    break;
                                case 8:
                                    image.Rotate(-90);
                                    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 fff = FontCollection.SystemFonts.Find(PicSettings.Instance.NomeFont);
            //var fff = FontCollection.SystemFonts.Find("Segoe Print");

            var font = new Font(fff, (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("aaa", scaledFont, g, new Vector2(0, 0));

            //image.DrawText(PicSettings.Instance.TestoApplicareOrizzontale, font, Color.Black, )
            //image.DrawText(PicSettings.Instance.TestoApplicareOrizzontale, scaledFont, c, new Vector2(0, 0));
            //image.DrawText("sssssssssssssssssssssssssssssssssssssssssssssss", font, Color.Black, new Vector2(200, 200));

            //ahjsdfhjklasj
            //double hr = image.MetaData.HorizontalResolution;
            //double vr = image.MetaData.HorizontalResolution;
            //image.MetaData.HorizontalResolution = 72;
            //image.MetaData.VerticalResolution = 72;
            //image.DrawText("sssssssssssssssssssssssssssssssssssssssssssssss", font, Color.Black, new Vector2(200, 200));
            //image.MetaData.HorizontalResolution = hr;
            //image.MetaData.VerticalResolution = hr;
        }

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