using ComPDFKit.PDFDocument;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PDFPageTest
{
    internal class PDFPageTest
    {
        static private string outputPath = Path.GetDirectoryName(Path.GetDirectoryName(Path.GetDirectoryName(System.IO.Directory.GetCurrentDirectory()))) + "\\Output\\PDFPageTest";
        static void Main(string[] args)
        {
            Console.WriteLine("Running PDFPage test sample…\r\n");

            SDKLicenseHelper.LicenseVerify();
            CPDFDocument document = CPDFDocument.InitWithFilePath("CommonFivePage.pdf");
            if (!Directory.Exists(outputPath))
            {
                Directory.CreateDirectory(outputPath);
            }

            if (InsertBlankPage(document))
            {
                Console.WriteLine("Insert blank page done.");
            }
            else
            {
                Console.WriteLine("Insert blank page failed.");
            }
            document.Release();
            document = CPDFDocument.InitWithFilePath("CommonFivePage.pdf");
            Console.WriteLine("--------------------");
            if (InsertPDFPPage(document))
            {
                Console.WriteLine("Insert PDF page done.");
            }
            else
            {
                Console.WriteLine("Insert PDF page failed.");
            }
            document.Release();
            document = CPDFDocument.InitWithFilePath("CommonFivePage.pdf");
            Console.WriteLine("--------------------");
            if (SplitPages(document))
            {
                Console.WriteLine("Split page done.");
            }
            else
            {
                Console.WriteLine("Split failed.");
            } 
            document.Release();
            document = CPDFDocument.InitWithFilePath("CommonFivePage.pdf");
            Console.WriteLine("--------------------");
            if (RemovePaes(document))
            {
                Console.WriteLine("Delete even page done.");
            }
            else
            {
                Console.WriteLine("Delete even page failed.");
            } 
            document.Release();
            document = CPDFDocument.InitWithFilePath("CommonFivePage.pdf");
            Console.WriteLine("--------------------");
            if (RotatePage(document))
            {
                Console.WriteLine("Rotate page done.");
            }
            else
            {
                Console.WriteLine("Rotate page failed.");
            }

            document.Release();
            document = CPDFDocument.InitWithFilePath("CommonFivePage.pdf");
            Console.WriteLine("--------------------");
            if (RepalcePages(document))
            {
                Console.WriteLine("Repalce page done.");
            }
            else
            {
                Console.WriteLine("Repalce page failed.");
            }

            document.Release();
            document = CPDFDocument.InitWithFilePath("CommonFivePage.pdf");
            Console.WriteLine("--------------------");
            if (ExtractPages(document))
            {
                Console.WriteLine("Extract page done.");
            }
            else
            {
                Console.WriteLine("Extract page failed.");
            }

            Console.WriteLine("--------------------");
            Console.WriteLine("Done");
            Console.WriteLine("--------------------");

            Console.ReadLine();
        }

        static private bool InsertBlankPage(CPDFDocument document)
        {
            int pageIndex = 1;
            int pageWidth = 595;
            int pageHeight = 842;
            document.InsertPage(pageIndex, pageWidth, pageHeight, null);
            Console.WriteLine("Insert PageIndex: {0}", pageIndex);
            Console.WriteLine("Size; {0}*{1}", pageWidth, pageHeight);

            if (document.PageCount != 6)
            {
                return false;
            }

            string path = outputPath + "\\InsertBlankPageTest.pdf";
            if (!document.WriteToFilePath(path))
            {
                return false;
            }
            Console.WriteLine("Browse the changed file in " + path);
            return true;
        }

        static private bool InsertPDFPPage(CPDFDocument document)
        {
            CPDFDocument documentForInsert = CPDFDocument.InitWithFilePath("Text.pdf");
            document.ImportPagesAtIndex(documentForInsert, "1", 1);
            if (document.PageCount != 6)
            {
                return false;
            }
            string path = outputPath + "\\InsertPDFPPageTest.pdf";
            if (!document.WriteToFilePath(path))
            {
                return false;
            }
            Console.WriteLine("Browse the changed file in " + path);
            return true;
        }

        static private bool SplitPages(CPDFDocument document)
        {
            CPDFDocument documentPart1 = CPDFDocument.CreateDocument();
            CPDFDocument documentPart2 = CPDFDocument.CreateDocument();
            documentPart1.ImportPagesAtIndex(document, "1-2", 0);
            documentPart2.ImportPagesAtIndex(document, "3-5", 0);
            if (documentPart1.PageCount != 2)
            {
                return false;
            }
            string pathPart1 = outputPath + "\\SplitPart1Test.pdf";
            if (!documentPart1.WriteToFilePath(pathPart1))
            {
                return false;
            }
            if (documentPart2.PageCount != 3)
            {
                return false;
            }
            string pathPart2 = outputPath + "\\SplitPart2Test.pdf";
            if (!documentPart2.WriteToFilePath(pathPart2))
            {
                return false;
            }
            Console.WriteLine("Browse the changed file in " + pathPart1);
            Console.WriteLine("Browse the changed file in " + pathPart2);
            return true;
        }

        static private bool RemovePaes(CPDFDocument document)
        {
            ArrayList arr = new ArrayList();
            for (int i = 2; i < document.PageCount; i += 2){
                arr.Add(i);
            }
            document.RemovePages((int[])arr.ToArray(typeof(int)));
            if(document.PageCount != 3)
            {
                return false;
            } 
            string path = outputPath + "\\RemoveEvenPagesTest.pdf";
            if (!document.WriteToFilePath(path))
            {
                return false;
            }
            Console.WriteLine("Browse the changed file in " + path);
            return true;
        }

        static private bool RotatePage(CPDFDocument document)
        {
            document.RotatePage(0, 1);
            string path = outputPath + "\\RotatePageTest.pdf";
            if (!document.WriteToFilePath(path))
            {
                return false;
            }
            Console.WriteLine("Browse the changed file in " + path);
            return true;
        }

        static private bool RepalcePages(CPDFDocument document)
        {
            int[] pageArr = new int[1];
            pageArr[0] = 0;
            document.RemovePages(pageArr);
            CPDFDocument documentForInsert = CPDFDocument.InitWithFilePath("Text.pdf");
            document.ImportPagesAtIndex(documentForInsert, "1", 0);
            string path = outputPath + "\\RepalcePagesTest.pdf";
            if (!document.WriteToFilePath(path))
            {
                return false;
            }
            Console.WriteLine("Browse the changed file in " + path);
            return true;
        }

        static private bool ExtractPages(CPDFDocument document)
        {
            CPDFDocument extractDocument = CPDFDocument.CreateDocument();
            extractDocument.ImportPagesAtIndex(document, "1", 0);
            if (!(extractDocument.PageCount == 1))
            {
                return false;
            }
            string path = outputPath + "\\ExtractPagesTest.pdf";
            if (!extractDocument.WriteToFilePath(path))
            {
                return false;
            }
            Console.WriteLine("Browse the changed file in " + path);
            return true;
        }
    }
}