using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;

namespace MuPDFLib
{
    public static class MuPdfConverter
    {
        public static byte[] ConvertPdfToTiff(byte[] image, float dpi, RenderType type, bool rotateLandscapePages, bool shrinkToLetter, int maxSizeInPdfPixels, string pdfPassword)
        {
            byte[] output = null;

            if (image == null)
                throw new ArgumentNullException("image");

            using (MuPDF pdfDoc = new MuPDF(image, pdfPassword))
            {
                using (MemoryStream outputStream = new MemoryStream())
                {
                    ImageCodecInfo info = null;
                    foreach (ImageCodecInfo ice in ImageCodecInfo.GetImageEncoders())
                        if (ice.MimeType == "image/tiff")
                            info = ice;

                    Bitmap saveTif = null;
                    pdfDoc.AntiAlias = false;
                    for (int i = 1; i <= pdfDoc.PageCount; i++)
                    {
                        int Width = 0;//Zero for no resize.
                        int Height = 0;//Zero for autofit height to width.

                        pdfDoc.Page = i;

                        Bitmap FirstImage = pdfDoc.GetBitmap(Width, Height, dpi, dpi, 0, type, rotateLandscapePages, shrinkToLetter, maxSizeInPdfPixels);
                        if (FirstImage == null)
                            throw new Exception("Unable to convert pdf to tiff!");
                        using (EncoderParameters ep = new EncoderParameters(2))
                        {
                            ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.MultiFrame);
                            ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionLZW);
                            if (type == RenderType.Monochrome)
                            {
                                ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionCCITT4);
                            }

                            if (i == 1)
                            {
                                saveTif = FirstImage;
                                saveTif.Save(outputStream, info, ep);
                            }
                            else
                            {
                                ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.FrameDimensionPage);
                                saveTif.SaveAdd(FirstImage, ep);
                                FirstImage.Dispose();
                            }
                            if (i == pdfDoc.PageCount)
                            {
                                ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.Flush);
                                saveTif.SaveAdd(ep);
                                saveTif.Dispose();
                            }
                        }
                    }
                    output = outputStream.ToArray();
                }
            }
            return output;
        }

        public static bool ConvertPdfToTiff(string sourceFile, string outputFile, float dpi, RenderType type, bool rotateLandscapePages, bool shrinkToLetter, int maxSizeInPdfPixels, string pdfPassword)
        {
            bool output = false;

            if (string.IsNullOrEmpty(sourceFile) || string.IsNullOrEmpty(outputFile))
                throw new ArgumentNullException();

            using (MuPDF pdfDoc = new MuPDF(sourceFile, pdfPassword))
            {
                using (FileStream outputStream = new FileStream(outputFile, FileMode.Create, FileAccess.ReadWrite, FileShare.None))
                {
                    ImageCodecInfo info = null;
                    foreach (ImageCodecInfo ice in ImageCodecInfo.GetImageEncoders())
                        if (ice.MimeType == "image/tiff")
                            info = ice;

                    Bitmap saveTif = null;
                    pdfDoc.AntiAlias = false;
                    for (int i = 1; i <= pdfDoc.PageCount; i++)
                    {
                        pdfDoc.Page = i;

                        Bitmap FirstImage = pdfDoc.GetBitmap(0, 0, dpi, dpi, 0, type, rotateLandscapePages, shrinkToLetter, maxSizeInPdfPixels);
                        if (FirstImage == null)
                            throw new Exception("Unable to convert pdf to tiff!");

                        using (EncoderParameters ep = new EncoderParameters(2))
                        {
                            ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.MultiFrame);
                            ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionLZW);
                            if (type == RenderType.Monochrome)
                            {
                                ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionCCITT4);
                            }

                            if (i == 1)
                            {
                                saveTif = FirstImage;
                                saveTif.Save(outputStream, info, ep);
                            }
                            else
                            {
                                ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.FrameDimensionPage);
                                saveTif.SaveAdd(FirstImage, ep);
                                FirstImage.Dispose();
                            }
                            if (i == pdfDoc.PageCount)
                            {
                                ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.Flush);
                                saveTif.SaveAdd(ep);
                                saveTif.Dispose();
                            }
                        }
                    }
                }
                if (File.Exists(outputFile))
                    output = true;
            }
            return output;
        }

        public static byte[] ConvertPdfToFaxTiff(byte[] image, float dpi, bool shrinkToLetter, string pdfPassword)
        {
            byte[] output = null;
            const long Compression = (long)EncoderValue.CompressionCCITT4;

            using (MuPDF pdfDoc = new MuPDF(image, pdfPassword))
            {
                using (MemoryStream outputStream = new MemoryStream())
                {
                    ImageCodecInfo info = null;
                    foreach (ImageCodecInfo ice in ImageCodecInfo.GetImageEncoders())
                        if (ice.MimeType == "image/tiff")
                            info = ice;

                    Bitmap saveTif = null;
                    pdfDoc.AntiAlias = false;
                    for (int i = 1; i <= pdfDoc.PageCount; i++)
                    {
                        int Width = 0;//Zero for no resize.
                        //int Height = 0;//Zero for autofit height to width.
                        float DpiX = dpi;
                        float DpiY = dpi;

                        pdfDoc.Page = i;

                        if (dpi == 200)
                        {
                            Width = 1728;
                            DpiX = 204;
                            DpiY = 196;
                        }
                        else if (dpi == 300)
                            Width = 2592;
                        else if (dpi == 400)
                            Width = 3456;

                        Bitmap FirstImage = pdfDoc.GetBitmap(Width, 0, DpiX, DpiY, 0, RenderType.Monochrome, true, shrinkToLetter, 0);
                        if (FirstImage == null)
                            throw new Exception("Unable to convert pdf to tiff!");

                        using (EncoderParameters ep = new EncoderParameters(2))
                        {
                            ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.MultiFrame);
                            ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, Compression);

                            if (i == 1)
                            {
                                saveTif = FirstImage;
                                saveTif.Save(outputStream, info, ep);
                            }
                            else
                            {
                                ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.FrameDimensionPage);
                                saveTif.SaveAdd(FirstImage, ep);
                                FirstImage.Dispose();
                            }
                            if (i == pdfDoc.PageCount)
                            {
                                ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.Flush);
                                saveTif.SaveAdd(ep);
                                saveTif.Dispose();
                            }
                        }
                    }
                    output = outputStream.ToArray();
                }
            }
            return output;
        }

        public static bool ConvertPdfToFaxTiff(string sourceFile, string outputFile, float dpi, bool shrinkToLetter, string pdfPassword)
        {
            bool output = false;
            const long Compression = (long)EncoderValue.CompressionCCITT4;

            using (MuPDF pdfDoc = new MuPDF(sourceFile, pdfPassword))
            {
                using (FileStream outputStream = new FileStream(outputFile, FileMode.Create, FileAccess.ReadWrite, FileShare.None))
                {
                    ImageCodecInfo info = null;
                    foreach (ImageCodecInfo ice in ImageCodecInfo.GetImageEncoders())
                        if (ice.MimeType == "image/tiff")
                            info = ice;

                    Bitmap saveTif = null;
                    pdfDoc.AntiAlias = false;
                    for (int i = 1; i <= pdfDoc.PageCount; i++)
                    {
                        int Width = 0;//Zero for no resize.
                        //int Height = 0;//Zero for autofit height to width.
                        float DpiX = dpi;
                        float DpiY = dpi;

                        pdfDoc.Page = i;

                        if (dpi == 200)
                        {
                            Width = 1728;
                            DpiX = 204;
                            DpiY = 196;
                        }
                        else if (dpi == 300)
                            Width = 2592;
                        else if (dpi == 400)
                            Width = 3456;

                        Bitmap FirstImage = pdfDoc.GetBitmap(Width, 0, DpiX, DpiY, 0, RenderType.Monochrome, true, shrinkToLetter, 0);
                        if (FirstImage == null)
                            throw new Exception("Unable to convert pdf to tiff!");
                        using (EncoderParameters ep = new EncoderParameters(2))
                        {
                            ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.MultiFrame);
                            ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, Compression);

                            if (i == 1)
                            {
                                saveTif = FirstImage;
                                saveTif.Save(outputStream, info, ep);
                            }
                            else
                            {
                                ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.FrameDimensionPage);
                                saveTif.SaveAdd(FirstImage, ep);
                                FirstImage.Dispose();
                            }
                            if (i == pdfDoc.PageCount)
                            {
                                ep.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.Flush);
                                saveTif.SaveAdd(ep);
                                saveTif.Dispose();
                            }
                        }
                    }
                }
                if (File.Exists(outputFile))
                    output = true;
            }
            return output;
        }
    }
}