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using Aspose.Ocr.Cloud.Sdk;
using Aspose.Ocr.Cloud.Sdk.Model;
using Aspose.Ocr.Cloud.Sdk.Model.Requests;
using Newtonsoft.Json.Linq;

public class AsposeOCRForCloudConnector : IOcrConnector
{
    private readonly Configuration configuration;

    public AsposeOCRForCloudConnector()
    {
        configuration = new Configuration();
        configuration.AppSid = Environment.GetEnvironmentVariable("ASPOSE_CLOUD_APPSID");
        configuration.AppKey = Environment.GetEnvironmentVariable("ASPOSE_CLOUD_APPKEY");
        configuration.ApiBaseUrl = "https://api.aspose.cloud";
        configuration.IdentityServerBaseUrl = "https://api.aspose.cloud";
    }

    public RecognizedImage Recognize(Stream imageStream)
    {
        try
        {
            OcrApi api = new OcrApi(configuration);
            var request = new PostOcrFromUrlOrContentRequest(imageStream, resultType: ResultType.Internal, dsrMode: DsrMode.DsrAndFilter);
            OCRResponse response = api.PostOcrFromUrlOrContent(request);
            return CreateDtoFromResponse(JToken.Parse(response.Text));
        }
        catch (Exception ex)
        {
            Console.WriteLine("Aspose.OCR for Cloud Recognition failed: {0}", ex.ToString());
        }
        return new RecognizedImage(new List<TextLine>());
    }

    protected virtual RecognizedImage CreateDtoFromResponse(JToken jToken)
    {
        return new RecognizedImage(LeafRecursion(jToken));
    }

    private TextLine[] LeafRecursion(JToken jToken)
    {
        List<TextLine> lines = new List<TextLine>();
        if (jToken["leaves"].Count() > 0)
        {
            foreach (var node in jToken["leaves"])
            {
                if (node["leaves"].Count() > 0)
                {
                    lines.AddRange(LeafRecursion(node));
                }
                else
                {
                    TextLine textLine = CreateTextLine(node);
                    if (textLine != null)
                    {
                        lines.Add(textLine);
                    }
                }
            }
        }
        return lines.ToArray();
    }

    private TextLine CreateTextLine(JToken line)
    {
        string lineText = line["values"].ToString();
        Rectangle lineRectangle = GetLineRectangle(line);
        if (!string.IsNullOrEmpty(lineText) && !lineRectangle.IsEmpty)
        {
            return new TextLine(RegularTextLine.SplitToFragments(lineText, lineRectangle));
        }
        else
        {
            return null;
        }
    }

    private Rectangle GetLineRectangle(JToken line)
    {
        var rect = line["rect"];
        return new Rectangle(rect[0].Value<int>(), rect[1].Value<int>(), rect[2].Value<int>() - rect[0].Value<int>(),
            rect[3].Value<int>() - rect[1].Value<int>());
    }
}