using System;
using System.Text;
using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;
using PdfSharp.Pdf.Content;
using PdfSharp.Pdf.Content.Objects;

class Program
{
    static void Main()
    {
        // Specify the path to the PDF file
        string pdfFilePath = "output.pdf";

        // Open the PDF document in import mode
        // Note: PDFsharp requires specific open modes for different operations
        PdfDocument document = PdfReader.Open(pdfFilePath, PdfDocumentOpenMode.Import);

        // Create StringBuilder for extracted text
        // This approach is less efficient than IronPDF's built-in methods
        StringBuilder extractedText = new StringBuilder();

        // Iterate through each page of the document
        for (int pageIndex = 0; pageIndex < document.PageCount; pageIndex++)
        {
            // Get the current page
            PdfPage page = document.Pages[pageIndex];
            
            // Extract text using content reader (simplified approach)
            // Real implementation requires extensive operator parsing
            CObject content = ContentReader.ReadContent(page);
            
            // Parse content objects to extract text
            // This is where PDFsharp becomes significantly complex
            ExtractText(content, extractedText);
            
            // Note: Actual text extraction requires parsing operators
            // This is a simplified representation
            Console.WriteLine($"Page {pageIndex + 1} processed");
        }

        Console.WriteLine("Extracted Text: " + extractedText.ToString());
        Console.ReadLine(); // Wait for user input before closing the console
    }
    
    static void ExtractText(CObject content, StringBuilder text)
    {
        // PDFsharp requires manual parsing of content streams
        // This is significantly more complex than shown here
        // Real implementation would need to handle:
        // - Text operators (Tj, TJ, ', ", etc.)
        // - Font encoding and character mapping
        // - Text positioning and transformation matrices
        // - Unicode mapping and glyph substitution
        // - Whitespace detection and word boundaries
        
        if (content is CArray array)
        {
            foreach (var item in array)
            {
                ExtractText(item, text);
            }
        }
        else if (content is CString str)
        {
            // Simplified text extraction - real implementation needs encoding handling
            text.Append(str.Value);
        }
        // Additional operators would need handling for complete extraction
    }
}

using System;
using System.Text;
using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;
using PdfSharp.Pdf.Content;
using PdfSharp.Pdf.Content.Objects;

class Program
{
    static void Main()
    {
        // Specify the path to the PDF file
        string pdfFilePath = "output.pdf";

        // Open the PDF document in import mode
        // Note: PDFsharp requires specific open modes for different operations
        PdfDocument document = PdfReader.Open(pdfFilePath, PdfDocumentOpenMode.Import);

        // Create StringBuilder for extracted text
        // This approach is less efficient than IronPDF's built-in methods
        StringBuilder extractedText = new StringBuilder();

        // Iterate through each page of the document
        for (int pageIndex = 0; pageIndex < document.PageCount; pageIndex++)
        {
            // Get the current page
            PdfPage page = document.Pages[pageIndex];
            
            // Extract text using content reader (simplified approach)
            // Real implementation requires extensive operator parsing
            CObject content = ContentReader.ReadContent(page);
            
            // Parse content objects to extract text
            // This is where PDFsharp becomes significantly complex
            ExtractText(content, extractedText);
            
            // Note: Actual text extraction requires parsing operators
            // This is a simplified representation
            Console.WriteLine($"Page {pageIndex + 1} processed");
        }

        Console.WriteLine("Extracted Text: " + extractedText.ToString());
        Console.ReadLine(); // Wait for user input before closing the console
    }
    
    static void ExtractText(CObject content, StringBuilder text)
    {
        // PDFsharp requires manual parsing of content streams
        // This is significantly more complex than shown here
        // Real implementation would need to handle:
        // - Text operators (Tj, TJ, ', ", etc.)
        // - Font encoding and character mapping
        // - Text positioning and transformation matrices
        // - Unicode mapping and glyph substitution
        // - Whitespace detection and word boundaries
        
        if (content is CArray array)
        {
            foreach (var item in array)
            {
                ExtractText(item, text);
            }
        }
        else if (content is CString str)
        {
            // Simplified text extraction - real implementation needs encoding handling
            text.Append(str.Value);
        }
        // Additional operators would need handling for complete extraction
    }
}

// PDFsharp: Complex font handling and text positioning
PdfDocument document = new PdfDocument();
PdfPage page = document.AddPage();
XGraphics gfx = XGraphics.FromPdfPage(page);

// Must manually specify fonts and handle font embedding
XFont font = new XFont("Arial", 12, XFontStyle.Regular);

// Manual text positioning with exact coordinates
gfx.DrawString("Hello World", font, XBrushes.Black,
    new XRect(0, 0, page.Width, page.Height),
    XStringFormats.Center);

// Must handle coordinate transformations manually
gfx.TranslateTransform(100, 200);
gfx.RotateTransform(45);
gfx.DrawString("Rotated Text", font, XBrushes.Red, 0, 0);

// IronPDF: Simple HTML approach with CSS styling
var renderer = new ChromePdfRenderer();
var doc = renderer.RenderHtmlAsPdf(@"
    <h1 style='text-align: center;'>Hello World</h1>
    <p style='transform: rotate(45deg); margin-left: 100px; margin-top: 200px; color: red;'>
        Rotated Text
    </p>");
    
// IronPDF automatically handles fonts, positioning, and transformations

// PDFsharp: Complex font handling and text positioning
PdfDocument document = new PdfDocument();
PdfPage page = document.AddPage();
XGraphics gfx = XGraphics.FromPdfPage(page);

// Must manually specify fonts and handle font embedding
XFont font = new XFont("Arial", 12, XFontStyle.Regular);

// Manual text positioning with exact coordinates
gfx.DrawString("Hello World", font, XBrushes.Black,
    new XRect(0, 0, page.Width, page.Height),
    XStringFormats.Center);

// Must handle coordinate transformations manually
gfx.TranslateTransform(100, 200);
gfx.RotateTransform(45);
gfx.DrawString("Rotated Text", font, XBrushes.Red, 0, 0);

// IronPDF: Simple HTML approach with CSS styling
var renderer = new ChromePdfRenderer();
var doc = renderer.RenderHtmlAsPdf(@"
    <h1 style='text-align: center;'>Hello World</h1>
    <p style='transform: rotate(45deg); margin-left: 100px; margin-top: 200px; color: red;'>
        Rotated Text
    </p>");
    
// IronPDF automatically handles fonts, positioning, and transformations

using IronPdf;
using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        // Load the PDF document with error handling
        var pdf = PdfDocument.FromFile("output.pdf");

        // Extract all the text content from the PDF
        string text = pdf.ExtractAllText();

        // Print the extracted text to the console
        Console.WriteLine("Full document text:");
        Console.WriteLine(text);
        
        // Additional extraction options demonstrating IronPDF's versatility
        
        // Extract text from specific pages with formatting preserved
        string pageText = pdf.ExtractTextFromPage(0);
        Console.WriteLine($"\nPage 1 text: {pageText}");
        
        // Extract all images and save them
        var images = pdf.ExtractAllImages();
        for (int i = 0; i < images.Count; i++)
        {
            images[i].SaveAs($"extracted_image_{i}.png");
        }
        
        // Access complete metadata
        string author = pdf.MetaData.Author;
        string title = pdf.MetaData.Title;
        string subject = pdf.MetaData.Subject;
        DateTime creationDate = pdf.MetaData.CreationDate;
        
        Console.WriteLine($"\nDocument Info:");
        Console.WriteLine($"Title: {title}");
        Console.WriteLine($"Author: {author}");
        Console.WriteLine($"Created: {creationDate}");
        
        // Search for specific text
        var searchResults = pdf.Search("invoice");
        foreach (var result in searchResults)
        {
            Console.WriteLine($"Found '{result.Text}' on page {result.PageIndex}");
        }
        
        // Extract form field data
        var form = pdf.Form;
        foreach (var field in form.Fields)
        {
            Console.WriteLine($"Field: {field.Name} = {field.Value}");
        }
    }
}

using IronPdf;
using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        // Load the PDF document with error handling
        var pdf = PdfDocument.FromFile("output.pdf");

        // Extract all the text content from the PDF
        string text = pdf.ExtractAllText();

        // Print the extracted text to the console
        Console.WriteLine("Full document text:");
        Console.WriteLine(text);
        
        // Additional extraction options demonstrating IronPDF's versatility
        
        // Extract text from specific pages with formatting preserved
        string pageText = pdf.ExtractTextFromPage(0);
        Console.WriteLine($"\nPage 1 text: {pageText}");
        
        // Extract all images and save them
        var images = pdf.ExtractAllImages();
        for (int i = 0; i < images.Count; i++)
        {
            images[i].SaveAs($"extracted_image_{i}.png");
        }
        
        // Access complete metadata
        string author = pdf.MetaData.Author;
        string title = pdf.MetaData.Title;
        string subject = pdf.MetaData.Subject;
        DateTime creationDate = pdf.MetaData.CreationDate;
        
        Console.WriteLine($"\nDocument Info:");
        Console.WriteLine($"Title: {title}");
        Console.WriteLine($"Author: {author}");
        Console.WriteLine($"Created: {creationDate}");
        
        // Search for specific text
        var searchResults = pdf.Search("invoice");
        foreach (var result in searchResults)
        {
            Console.WriteLine($"Found '{result.Text}' on page {result.PageIndex}");
        }
        
        // Extract form field data
        var form = pdf.Form;
        foreach (var field in form.Fields)
        {
            Console.WriteLine($"Field: {field.Name} = {field.Value}");
        }
    }
}

// Advanced PDF analysis with IronPDF
var pdf = PdfDocument.FromFile("complex-document.pdf");

// Extract structured content with detailed information
foreach (var page in pdf.Pages)
{
    // Get page dimensions for layout analysis
    var width = page.Width;
    var height = page.Height;
    var rotation = page.Rotation;
    
    // Extract form fields with type information
    var formFields = page.GetFormFields();
    foreach (var field in formFields)
    {
        Console.WriteLine($"Field: {field.Name}, Type: {field.Type}, Value: {field.Value}");
    }
    
    // Extract annotations with properties
    var annotations = page.GetAnnotations();
    foreach (var annotation in annotations)
    {
        Console.WriteLine($"Annotation: {annotation.Title} - {annotation.Content}");
    }
    
    // Extract hyperlinks with destinations
    var links = page.GetLinks();
    foreach (var link in links)
    {
        Console.WriteLine($"Link: {link.Text} -> {link.Url}");
    }
}

// Advanced search functionality with context
var searchResults = pdf.Search("invoice", SearchOptions.CaseInsensitive | SearchOptions.WholeWord);
foreach (var result in searchResults)
{
    Console.WriteLine($"Found on page {result.PageIndex} at position {result.Position}: {result.Text}");
    // Get surrounding text for context
    string context = pdf.ExtractTextFromPage(result.PageIndex)
        .Substring(Math.Max(0, result.Position - 50), 100);
    Console.WriteLine($"Context: ...{context}...");
}

// Extract tables as structured data
var tables = pdf.ExtractTables();
foreach (var table in tables)
{
    for (int row = 0; row < table.RowCount; row++)
    {
        for (int col = 0; col < table.ColumnCount; col++)
        {
            Console.Write($"{table[row, col]}\t");
        }
        Console.WriteLine();
    }
}

// Advanced PDF analysis with IronPDF
var pdf = PdfDocument.FromFile("complex-document.pdf");

// Extract structured content with detailed information
foreach (var page in pdf.Pages)
{
    // Get page dimensions for layout analysis
    var width = page.Width;
    var height = page.Height;
    var rotation = page.Rotation;
    
    // Extract form fields with type information
    var formFields = page.GetFormFields();
    foreach (var field in formFields)
    {
        Console.WriteLine($"Field: {field.Name}, Type: {field.Type}, Value: {field.Value}");
    }
    
    // Extract annotations with properties
    var annotations = page.GetAnnotations();
    foreach (var annotation in annotations)
    {
        Console.WriteLine($"Annotation: {annotation.Title} - {annotation.Content}");
    }
    
    // Extract hyperlinks with destinations
    var links = page.GetLinks();
    foreach (var link in links)
    {
        Console.WriteLine($"Link: {link.Text} -> {link.Url}");
    }
}

// Advanced search functionality with context
var searchResults = pdf.Search("invoice", SearchOptions.CaseInsensitive | SearchOptions.WholeWord);
foreach (var result in searchResults)
{
    Console.WriteLine($"Found on page {result.PageIndex} at position {result.Position}: {result.Text}");
    // Get surrounding text for context
    string context = pdf.ExtractTextFromPage(result.PageIndex)
        .Substring(Math.Max(0, result.Position - 50), 100);
    Console.WriteLine($"Context: ...{context}...");
}

// Extract tables as structured data
var tables = pdf.ExtractTables();
foreach (var table in tables)
{
    for (int row = 0; row < table.RowCount; row++)
    {
        for (int col = 0; col < table.ColumnCount; col++)
        {
            Console.Write($"{table[row, col]}\t");
        }
        Console.WriteLine();
    }
}

// IronPDF: Clean, maintainable code following SOLID principles
public class InvoiceService
{
    private readonly ITemplateEngine _templateEngine;
    private readonly IConfiguration _config;
    
    public async Task<byte[]> GenerateInvoicePdf(Invoice invoice)
    {
        // Render HTML from template with full CSS support
        var html = await _templateEngine.RenderAsync("invoice.html", invoice);
        
        // Configure rendering with fluent API
        var renderer = new ChromePdfRenderer
        {
            RenderingOptions = new ChromePdfRenderOptions
            {
                MarginTop = 50,
                MarginBottom = 50,
                PaperSize = PdfPaperSize.A4,
                Title = $"Invoice #{invoice.Number}",
                // Enable JavaScript for dynamic content
                EnableJavaScript = true,
                // Wait for AJAX calls to complete
                WaitFor = WaitFor.NetworkIdle0,
                // Custom headers and footers
                HtmlHeader = "<div style='text-align: center;'>{page} of {total-pages}</div>",
                HtmlFooter = "<div style='text-align: center;'>© 2024 Your Company</div>"
            }
        };
        
        // Render with full Chrome engine support
        var pdf = await renderer.RenderHtmlAsPdfAsync(html);
        
        // Add security features
        pdf.SecuritySettings.SetPassword("user-password", "owner-password");
        pdf.SecuritySettings.AllowPrinting = true;
        pdf.SecuritySettings.AllowCopy = false;
        
        // Add digital signature for authenticity
        pdf.SignWithCertificate(certificate, "Authorized Signature");
        
        // Improve for web delivery
        pdf.CompressImages(90);
        
        return pdf.BinaryData;
    }
}

// IronPDF: Clean, maintainable code following SOLID principles
public class InvoiceService
{
    private readonly ITemplateEngine _templateEngine;
    private readonly IConfiguration _config;
    
    public async Task<byte[]> GenerateInvoicePdf(Invoice invoice)
    {
        // Render HTML from template with full CSS support
        var html = await _templateEngine.RenderAsync("invoice.html", invoice);
        
        // Configure rendering with fluent API
        var renderer = new ChromePdfRenderer
        {
            RenderingOptions = new ChromePdfRenderOptions
            {
                MarginTop = 50,
                MarginBottom = 50,
                PaperSize = PdfPaperSize.A4,
                Title = $"Invoice #{invoice.Number}",
                // Enable JavaScript for dynamic content
                EnableJavaScript = true,
                // Wait for AJAX calls to complete
                WaitFor = WaitFor.NetworkIdle0,
                // Custom headers and footers
                HtmlHeader = "<div style='text-align: center;'>{page} of {total-pages}</div>",
                HtmlFooter = "<div style='text-align: center;'>© 2024 Your Company</div>"
            }
        };
        
        // Render with full Chrome engine support
        var pdf = await renderer.RenderHtmlAsPdfAsync(html);
        
        // Add security features
        pdf.SecuritySettings.SetPassword("user-password", "owner-password");
        pdf.SecuritySettings.AllowPrinting = true;
        pdf.SecuritySettings.AllowCopy = false;
        
        // Add digital signature for authenticity
        pdf.SignWithCertificate(certificate, "Authorized Signature");
        
        // Improve for web delivery
        pdf.CompressImages(90);
        
        return pdf.BinaryData;
    }
}