// Klippa: 15+ lines of HTTP plumbing before you read a single character
var content = new MultipartFormDataContent();
content.Add(new ByteArrayContent(File.ReadAllBytes(imagePath)), "document", "receipt.jpg");
_client.DefaultRequestHeaders.Add("X-Auth-Key", _apiKey); // auth header — rotates, breaks, leaks

var response = await _client.PostAsync(
    "https://custom-ocr.klippa.com/api/v1/parseDocument", content);
response.EnsureSuccessStatusCode(); // throws on 4xx/5xx — no retry, document lost

var json = await response.Content.ReadAsStringAsync();
var parsed = JsonSerializer.Deserialize<KlippaResponse>(json); // your schema, your maintenance
var text = parsed?.Data?.ParsedDocument?.Text; // nullable chain — breaks when schema changes

// Klippa: 15+ lines of HTTP plumbing before you read a single character
var content = new MultipartFormDataContent();
content.Add(new ByteArrayContent(File.ReadAllBytes(imagePath)), "document", "receipt.jpg");
_client.DefaultRequestHeaders.Add("X-Auth-Key", _apiKey); // auth header — rotates, breaks, leaks

var response = await _client.PostAsync(
    "https://custom-ocr.klippa.com/api/v1/parseDocument", content);
response.EnsureSuccessStatusCode(); // throws on 4xx/5xx — no retry, document lost

var json = await response.Content.ReadAsStringAsync();
var parsed = JsonSerializer.Deserialize<KlippaResponse>(json); // your schema, your maintenance
var text = parsed?.Data?.ParsedDocument?.Text; // nullable chain — breaks when schema changes

// IronOCR: no HTTP, no auth headers, no JSON — just text
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";
var text = new IronTesseract().Read(imagePath).Text;

// IronOCR: no HTTP, no auth headers, no JSON — just text
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";
var text = new IronTesseract().Read(imagePath).Text;

# Remove Klippa-related packages (if installed for REST support)
dotnet remove package Newtonsoft.Json
dotnet remove package System.Net.Http.Json

# Remove Klippa-related packages (if installed for REST support)
dotnet remove package Newtonsoft.Json
dotnet remove package System.Net.Http.Json

// Before (Klippa integration)
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text.Json;
using System.Text.Json.Serialization;

// After (IronOCR)
using IronOcr;

// Before (Klippa integration)
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text.Json;
using System.Text.Json.Serialization;

// After (IronOCR)
using IronOcr;

// Klippa: entire service class just to send one HTTP request
public class KlippaOcrService : IDisposable
{
    private readonly HttpClient _httpClient;
    private readonly string _baseUrl = "https://custom-ocr.klippa.com/api/v1";

    public KlippaOcrService(string apiKey)
    {
        _httpClient = new HttpClient();
        _httpClient.DefaultRequestHeaders.Add("X-Auth-Key", apiKey);
        _httpClient.Timeout = TimeSpan.FromSeconds(30); // network timeout required
    }

    public async Task<string> ReadDocumentTextAsync(string filePath)
    {
        using var form = new MultipartFormDataContent();
        var fileBytes = await File.ReadAllBytesAsync(filePath);
        form.Add(new ByteArrayContent(fileBytes), "document", Path.GetFileName(filePath));

        var response = await _httpClient.PostAsync($"{_baseUrl}/parseDocument", form);
        response.EnsureSuccessStatusCode();

        var json = await response.Content.ReadAsStringAsync();
        using var doc = JsonDocument.Parse(json);
        // navigate Klippa's nested JSON schema
        return doc.RootElement
            .GetProperty("data")
            .GetProperty("parsed_document")
            .GetProperty("text")
            .GetString() ?? string.Empty;
    }

    public void Dispose() => _httpClient.Dispose();
}

// Klippa: entire service class just to send one HTTP request
public class KlippaOcrService : IDisposable
{
    private readonly HttpClient _httpClient;
    private readonly string _baseUrl = "https://custom-ocr.klippa.com/api/v1";

    public KlippaOcrService(string apiKey)
    {
        _httpClient = new HttpClient();
        _httpClient.DefaultRequestHeaders.Add("X-Auth-Key", apiKey);
        _httpClient.Timeout = TimeSpan.FromSeconds(30); // network timeout required
    }

    public async Task<string> ReadDocumentTextAsync(string filePath)
    {
        using var form = new MultipartFormDataContent();
        var fileBytes = await File.ReadAllBytesAsync(filePath);
        form.Add(new ByteArrayContent(fileBytes), "document", Path.GetFileName(filePath));

        var response = await _httpClient.PostAsync($"{_baseUrl}/parseDocument", form);
        response.EnsureSuccessStatusCode();

        var json = await response.Content.ReadAsStringAsync();
        using var doc = JsonDocument.Parse(json);
        // navigate Klippa's nested JSON schema
        return doc.RootElement
            .GetProperty("data")
            .GetProperty("parsed_document")
            .GetProperty("text")
            .GetString() ?? string.Empty;
    }

    public void Dispose() => _httpClient.Dispose();
}

// IronOCR: no HTTP, no JSON navigation, no Dispose plumbing
public class OcrService
{
    private readonly IronTesseract _ocr = new IronTesseract();

    public string ReadDocumentText(string filePath)
    {
        return _ocr.Read(filePath).Text;
    }
}

// At startup:
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

// Usage — identical call site, different internals:
var service = new OcrService();
var text = service.ReadDocumentText("invoice.jpg"); // local, synchronous, zero network

// IronOCR: no HTTP, no JSON navigation, no Dispose plumbing
public class OcrService
{
    private readonly IronTesseract _ocr = new IronTesseract();

    public string ReadDocumentText(string filePath)
    {
        return _ocr.Read(filePath).Text;
    }
}

// At startup:
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

// Usage — identical call site, different internals:
var service = new OcrService();
var text = service.ReadDocumentText("invoice.jpg"); // local, synchronous, zero network

// Klippa: multipart upload — every document is an HTTP form POST
public async Task<KlippaResult> UploadAndParseAsync(
    string filePath, string documentType = "financial")
{
    using var form = new MultipartFormDataContent();

    // read file into memory — entire document in RAM before upload
    var fileBytes = await File.ReadAllBytesAsync(filePath);
    var byteContent = new ByteArrayContent(fileBytes);
    byteContent.Headers.ContentType =
        new System.Net.Http.Headers.MediaTypeHeaderValue("image/jpeg");

    form.Add(byteContent, "document", Path.GetFileName(filePath));
    form.Add(new StringContent(documentType), "DocumentType");

    // document leaves your server here
    var response = await _httpClient.PostAsync(
        "https://custom-ocr.klippa.com/api/v1/parseDocument", form);

    if (!response.IsSuccessStatusCode)
    {
        var error = await response.Content.ReadAsStringAsync();
        throw new InvalidOperationException($"Klippa API error: {response.StatusCode} — {error}");
    }

    var json = await response.Content.ReadAsStringAsync();
    return JsonSerializer.Deserialize<KlippaResult>(json,
        new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
}

// Klippa: multipart upload — every document is an HTTP form POST
public async Task<KlippaResult> UploadAndParseAsync(
    string filePath, string documentType = "financial")
{
    using var form = new MultipartFormDataContent();

    // read file into memory — entire document in RAM before upload
    var fileBytes = await File.ReadAllBytesAsync(filePath);
    var byteContent = new ByteArrayContent(fileBytes);
    byteContent.Headers.ContentType =
        new System.Net.Http.Headers.MediaTypeHeaderValue("image/jpeg");

    form.Add(byteContent, "document", Path.GetFileName(filePath));
    form.Add(new StringContent(documentType), "DocumentType");

    // document leaves your server here
    var response = await _httpClient.PostAsync(
        "https://custom-ocr.klippa.com/api/v1/parseDocument", form);

    if (!response.IsSuccessStatusCode)
    {
        var error = await response.Content.ReadAsStringAsync();
        throw new InvalidOperationException($"Klippa API error: {response.StatusCode} — {error}");
    }

    var json = await response.Content.ReadAsStringAsync();
    return JsonSerializer.Deserialize<KlippaResult>(json,
        new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
}

// IronOCR: load from file path, byte array, or stream — no upload, no form
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

// From file path
using var input = new OcrInput();
input.LoadImage("invoice.jpg");
var result = new IronTesseract().Read(input);

// From byte array (same bytes Klippa was uploading)
byte[] fileBytes = await File.ReadAllBytesAsync("invoice.jpg");
using var inputFromBytes = new OcrInput();
inputFromBytes.LoadImage(fileBytes);
var resultFromBytes = new IronTesseract().Read(inputFromBytes);

Console.WriteLine(result.Text);

// IronOCR: load from file path, byte array, or stream — no upload, no form
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

// From file path
using var input = new OcrInput();
input.LoadImage("invoice.jpg");
var result = new IronTesseract().Read(input);

// From byte array (same bytes Klippa was uploading)
byte[] fileBytes = await File.ReadAllBytesAsync("invoice.jpg");
using var inputFromBytes = new OcrInput();
inputFromBytes.LoadImage(fileBytes);
var resultFromBytes = new IronTesseract().Read(inputFromBytes);

Console.WriteLine(result.Text);

// Klippa: deserialization model — breaks when API schema changes
public class KlippaResponse
{
    [JsonPropertyName("data")]
    public KlippaData Data { get; set; }
}

public class KlippaData
{
    [JsonPropertyName("parsed_document")]
    public KlippaParsedDocument ParsedDocument { get; set; }
}

public class KlippaParsedDocument
{
    [JsonPropertyName("text")]
    public string Text { get; set; }

    [JsonPropertyName("amount")]
    public decimal? Amount { get; set; }

    [JsonPropertyName("merchant")]
    public string Merchant { get; set; }

    [JsonPropertyName("date")]
    public string Date { get; set; }
}

// Usage: navigate the nullable chain every time
public async Task<string> GetExtractedTextAsync(string imagePath)
{
    var klippaResult = await UploadAndParseAsync(imagePath);
    // every property access is nullable — schema drift breaks this silently
    return klippaResult?.Data?.ParsedDocument?.Text ?? string.Empty;
}

// Klippa: deserialization model — breaks when API schema changes
public class KlippaResponse
{
    [JsonPropertyName("data")]
    public KlippaData Data { get; set; }
}

public class KlippaData
{
    [JsonPropertyName("parsed_document")]
    public KlippaParsedDocument ParsedDocument { get; set; }
}

public class KlippaParsedDocument
{
    [JsonPropertyName("text")]
    public string Text { get; set; }

    [JsonPropertyName("amount")]
    public decimal? Amount { get; set; }

    [JsonPropertyName("merchant")]
    public string Merchant { get; set; }

    [JsonPropertyName("date")]
    public string Date { get; set; }
}

// Usage: navigate the nullable chain every time
public async Task<string> GetExtractedTextAsync(string imagePath)
{
    var klippaResult = await UploadAndParseAsync(imagePath);
    // every property access is nullable — schema drift breaks this silently
    return klippaResult?.Data?.ParsedDocument?.Text ?? string.Empty;
}

// IronOCR: typed result object — no JSON schema, no nullable chains
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

var ocr = new IronTesseract();
var result = ocr.Read("invoice.jpg");

// Direct property access — no deserialization, no nullable navigation
string fullText   = result.Text;
double confidence = result.Confidence;
int pageCount     = result.Pages.Count();

// Structured data: lines and words with coordinates
foreach (var page in result.Pages)
{
    foreach (var line in page.Lines)
    {
        Console.WriteLine($"Line: '{line.Text}' at Y={line.Y}");
    }
}

// IronOCR: typed result object — no JSON schema, no nullable chains
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

var ocr = new IronTesseract();
var result = ocr.Read("invoice.jpg");

// Direct property access — no deserialization, no nullable navigation
string fullText   = result.Text;
double confidence = result.Confidence;
int pageCount     = result.Pages.Count();

// Structured data: lines and words with coordinates
foreach (var page in result.Pages)
{
    foreach (var line in page.Lines)
    {
        Console.WriteLine($"Line: '{line.Text}' at Y={line.Y}");
    }
}

// Klippa: retry policy required — cloud calls fail unpredictably
public async Task<string> ReadWithRetryAsync(string filePath, int maxRetries = 3)
{
    var delay = TimeSpan.FromSeconds(1);

    for (int attempt = 1; attempt <= maxRetries; attempt++)
    {
        try
        {
            using var form = new MultipartFormDataContent();
            form.Add(
                new ByteArrayContent(await File.ReadAllBytesAsync(filePath)),
                "document",
                Path.GetFileName(filePath));

            using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(30));
            var response = await _httpClient.PostAsync(
                "https://custom-ocr.klippa.com/api/v1/parseDocument", form, cts.Token);

            if (response.StatusCode == System.Net.HttpStatusCode.TooManyRequests)
            {
                // rate limited — back off and retry
                await Task.Delay(delay * attempt);
                continue;
            }

            response.EnsureSuccessStatusCode();
            var json = await response.Content.ReadAsStringAsync(cts.Token);
            var parsed = JsonSerializer.Deserialize<KlippaResponse>(json);
            return parsed?.Data?.ParsedDocument?.Text ?? string.Empty;
        }
        catch (HttpRequestException) when (attempt < maxRetries)
        {
            await Task.Delay(delay * attempt); // exponential backoff
        }
        catch (TaskCanceledException) when (attempt < maxRetries)
        {
            await Task.Delay(delay * attempt); // timeout — retry
        }
    }

    throw new InvalidOperationException($"Klippa API failed after {maxRetries} attempts");
}

// Klippa: retry policy required — cloud calls fail unpredictably
public async Task<string> ReadWithRetryAsync(string filePath, int maxRetries = 3)
{
    var delay = TimeSpan.FromSeconds(1);

    for (int attempt = 1; attempt <= maxRetries; attempt++)
    {
        try
        {
            using var form = new MultipartFormDataContent();
            form.Add(
                new ByteArrayContent(await File.ReadAllBytesAsync(filePath)),
                "document",
                Path.GetFileName(filePath));

            using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(30));
            var response = await _httpClient.PostAsync(
                "https://custom-ocr.klippa.com/api/v1/parseDocument", form, cts.Token);

            if (response.StatusCode == System.Net.HttpStatusCode.TooManyRequests)
            {
                // rate limited — back off and retry
                await Task.Delay(delay * attempt);
                continue;
            }

            response.EnsureSuccessStatusCode();
            var json = await response.Content.ReadAsStringAsync(cts.Token);
            var parsed = JsonSerializer.Deserialize<KlippaResponse>(json);
            return parsed?.Data?.ParsedDocument?.Text ?? string.Empty;
        }
        catch (HttpRequestException) when (attempt < maxRetries)
        {
            await Task.Delay(delay * attempt); // exponential backoff
        }
        catch (TaskCanceledException) when (attempt < maxRetries)
        {
            await Task.Delay(delay * attempt); // timeout — retry
        }
    }

    throw new InvalidOperationException($"Klippa API failed after {maxRetries} attempts");
}

// IronOCR: no network, no retry policy needed — local call either works or throws once
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

public string ReadDocument(string filePath)
{
    //Neinretry loop.NeinCancellationTokenSource.NeinHTTP status checks.
    //Neinrate limit handling.Neinpartial-JSON guards.
    var result = new IronTesseract().Read(filePath);
    return result.Text;
}

// IronOCR: no network, no retry policy needed — local call either works or throws once
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

public string ReadDocument(string filePath)
{
    //Neinretry loop.NeinCancellationTokenSource.NeinHTTP status checks.
    //Neinrate limit handling.Neinpartial-JSON guards.
    var result = new IronTesseract().Read(filePath);
    return result.Text;
}

// Klippa: PDF upload — entire document transmitted, results depend on cloud availability
public async Task<List<string>> ExtractPdfPagesAsync(string pdfPath)
{
    var pages = new List<string>();

    // Klippa parses the entire PDF server-side and returns combined results
    // You cannot control per-page processing or access raw page text
    using var form = new MultipartFormDataContent();
    form.Add(
        new ByteArrayContent(await File.ReadAllBytesAsync(pdfPath)),
        "document",
        Path.GetFileName(pdfPath));

    var response = await _httpClient.PostAsync(
        "https://custom-ocr.klippa.com/api/v1/parseDocument", form);
    response.EnsureSuccessStatusCode();

    var json = await response.Content.ReadAsStringAsync();
    var result = JsonSerializer.Deserialize<KlippaResponse>(json);
    // Klippa returns the combined parsed text — no per-page breakdown in basic API
    pages.Add(result?.Data?.ParsedDocument?.Text ?? string.Empty);

    return pages;
}

// Klippa: PDF upload — entire document transmitted, results depend on cloud availability
public async Task<List<string>> ExtractPdfPagesAsync(string pdfPath)
{
    var pages = new List<string>();

    // Klippa parses the entire PDF server-side and returns combined results
    // You cannot control per-page processing or access raw page text
    using var form = new MultipartFormDataContent();
    form.Add(
        new ByteArrayContent(await File.ReadAllBytesAsync(pdfPath)),
        "document",
        Path.GetFileName(pdfPath));

    var response = await _httpClient.PostAsync(
        "https://custom-ocr.klippa.com/api/v1/parseDocument", form);
    response.EnsureSuccessStatusCode();

    var json = await response.Content.ReadAsStringAsync();
    var result = JsonSerializer.Deserialize<KlippaResponse>(json);
    // Klippa returns the combined parsed text — no per-page breakdown in basic API
    pages.Add(result?.Data?.ParsedDocument?.Text ?? string.Empty);

    return pages;
}

// IronOCR: native PDF OCR with per-page structured access — no upload
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

using var input = new OcrInput();
input.LoadPdf("multi-page-invoice.pdf"); // reads locally — no HTTP

var ocr = new IronTesseract();
var result = ocr.Read(input);

// Per-page access — not available from Klippa's combined response
foreach (var page in result.Pages)
{
    Console.WriteLine($"Page {page.PageNumber}: {page.Lines.Count()} lines");
    Console.WriteLine(page.Text);
}

// Or produce a searchable PDF from the scanned original
result.SaveAsSearchablePdf("searchable-output.pdf");

// IronOCR: native PDF OCR with per-page structured access — no upload
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

using var input = new OcrInput();
input.LoadPdf("multi-page-invoice.pdf"); // reads locally — no HTTP

var ocr = new IronTesseract();
var result = ocr.Read(input);

// Per-page access — not available from Klippa's combined response
foreach (var page in result.Pages)
{
    Console.WriteLine($"Page {page.PageNumber}: {page.Lines.Count()} lines");
    Console.WriteLine(page.Text);
}

// Or produce a searchable PDF from the scanned original
result.SaveAsSearchablePdf("searchable-output.pdf");

// Keep async method signatures — switch the implementation
public async Task<string> ProcessDocumentAsync(
    string filePath, CancellationToken cancellationToken = default)
{
    // Previously: await _httpClient.PostAsync(...)
    // Now: local call, same awaitable pattern
    var ocr = new IronTesseract();
    var result = await ocr.ReadAsync(filePath);
    return result.Text;
}

// Keep async method signatures — switch the implementation
public async Task<string> ProcessDocumentAsync(
    string filePath, CancellationToken cancellationToken = default)
{
    // Previously: await _httpClient.PostAsync(...)
    // Now: local call, same awaitable pattern
    var ocr = new IronTesseract();
    var result = await ocr.ReadAsync(filePath);
    return result.Text;
}

// In Program.cs or Startup.cs
builder.Services.AddSingleton<IronTesseract>();

// Or wrap for interface compatibility
builder.Services.AddSingleton<IOcrService, IronOcrService>();

public class IronOcrService : IOcrService
{
    private readonly IronTesseract _ocr;
    public IronOcrService(IronTesseract ocr) => _ocr = ocr;

    public string ReadDocument(string path) => _ocr.Read(path).Text;
}

// In Program.cs or Startup.cs
builder.Services.AddSingleton<IronTesseract>();

// Or wrap for interface compatibility
builder.Services.AddSingleton<IOcrService, IronOcrService>();

public class IronOcrService : IOcrService
{
    private readonly IronTesseract _ocr;
    public IronOcrService(IronTesseract ocr) => _ocr = ocr;

    public string ReadDocument(string path) => _ocr.Read(path).Text;
}

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

// Target specific layout regions instead of relying on pre-parsed cloud fields
var totalRegion   = new CropRectangle(350, 580, 250, 50); // bottom-right total area
var merchantRegion = new CropRectangle(50, 30, 400, 60);  // top header area

using var merchantInput = new OcrInput();
merchantInput.LoadImage("receipt.jpg", merchantRegion);
var merchantName = new IronTesseract().Read(merchantInput).Text.Trim();

using var totalInput = new OcrInput();
totalInput.LoadImage("receipt.jpg", totalRegion);
var totalText = new IronTesseract().Read(totalInput).Text.Trim();

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

// Target specific layout regions instead of relying on pre-parsed cloud fields
var totalRegion   = new CropRectangle(350, 580, 250, 50); // bottom-right total area
var merchantRegion = new CropRectangle(50, 30, 400, 60);  // top header area

using var merchantInput = new OcrInput();
merchantInput.LoadImage("receipt.jpg", merchantRegion);
var merchantName = new IronTesseract().Read(merchantInput).Text.Trim();

using var totalInput = new OcrInput();
totalInput.LoadImage("receipt.jpg", totalRegion);
var totalText = new IronTesseract().Read(totalInput).Text.Trim();

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

// Stream from S3, Azure Blob, or any upstream source
public async Task<string> ProcessDocumentStreamAsync(Stream documentStream)
{
    using var input = new OcrInput();
    input.LoadImage(documentStream); // accepts Stream directly

    var ocr = new IronTesseract();
    var result = ocr.Read(input);
    return result.Text;
}

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

// Stream from S3, Azure Blob, or any upstream source
public async Task<string> ProcessDocumentStreamAsync(Stream documentStream)
{
    using var input = new OcrInput();
    input.LoadImage(documentStream); // accepts Stream directly

    var ocr = new IronTesseract();
    var result = ocr.Read(input);
    return result.Text;
}

[Fact]
public void ReadDocument_ReturnsExpectedText()
{
    IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";
    var ocr = new IronTesseract();

    // Use a real test fixture — no HTTP mocking, runs fully offline
    var result = ocr.Read("test-fixtures/sample-invoice.jpg");

    Assert.Contains("Invoice", result.Text, StringComparison.OrdinalIgnoreCase);
    Assert.True(result.Confidence > 70);
}

[Fact]
public void ReadDocument_ReturnsExpectedText()
{
    IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";
    var ocr = new IronTesseract();

    // Use a real test fixture — no HTTP mocking, runs fully offline
    var result = ocr.Read("test-fixtures/sample-invoice.jpg");

    Assert.Contains("Invoice", result.Text, StringComparison.OrdinalIgnoreCase);
    Assert.True(result.Confidence > 70);
}

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

using var input = new OcrInput();
input.LoadImage("low-quality-scan.jpg");
input.Deskew();    // fix rotation from camera or scanner
input.DeNoise();   // remove compression noise
input.Contrast();  // boost faded ink
input.Binarize();  // clean background for clearer character edges

var result = new IronTesseract().Read(input);
Console.WriteLine($"Confidence: {result.Confidence}%");

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

using var input = new OcrInput();
input.LoadImage("low-quality-scan.jpg");
input.Deskew();    // fix rotation from camera or scanner
input.DeNoise();   // remove compression noise
input.Contrast();  // boost faded ink
input.Binarize();  // clean background for clearer character edges

var result = new IronTesseract().Read(input);
Console.WriteLine($"Confidence: {result.Confidence}%");

# Find all files containing Klippa HTTP integration code
grep -r "X-Auth-Key" --include="*.cs" .
grep -r "klippa.com" --include="*.cs" .
grep -r "KlippaService\|KlippaResponse\|KlippaResult\|KlippaData" --include="*.cs" .

# Find all files with MultipartFormDataContent (likely Klippa upload code)
grep -r "MultipartFormDataContent" --include="*.cs" .

# Find all JSON deserialization models that map to Klippa response fields
grep -r "parsed_document\|vat_amount\|merchant\|X-Auth-Key" --include="*.cs" .

# Find all async methods that wrap Klippa calls
grep -r "ParseDocumentAsync\|ProcessReceiptAsync\|UploadAndParseAsync" --include="*.cs" .

# Find test files with HTTP mocks for Klippa
grep -r "MockHttp\|WireMock\|klippa" --include="*.cs" .

# Find all files containing Klippa HTTP integration code
grep -r "X-Auth-Key" --include="*.cs" .
grep -r "klippa.com" --include="*.cs" .
grep -r "KlippaService\|KlippaResponse\|KlippaResult\|KlippaData" --include="*.cs" .

# Find all files with MultipartFormDataContent (likely Klippa upload code)
grep -r "MultipartFormDataContent" --include="*.cs" .

# Find all JSON deserialization models that map to Klippa response fields
grep -r "parsed_document\|vat_amount\|merchant\|X-Auth-Key" --include="*.cs" .

# Find all async methods that wrap Klippa calls
grep -r "ParseDocumentAsync\|ProcessReceiptAsync\|UploadAndParseAsync" --include="*.cs" .

# Find test files with HTTP mocks for Klippa
grep -r "MockHttp\|WireMock\|klippa" --include="*.cs" .