using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace ByteScoutWebApiExample
{
    class Program
    {
        // The authentication key (API Key).
        // Get your own by registering at https://app.pdf.co
        const String API_KEY = "***********************************";

        // Direct URL of source PDF file.
        // You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/bytescout/pdf-co-api-samples/tree/master/File%20Upload/
        const string SourceFileUrl = "https://bytescout-com.s3.amazonaws.com/files/demo-files/cloud-api/pdf-to-xml/sample.pdf";
        // Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'.
        const string Pages = "";
        // PDF document password. Leave empty for unprotected documents.
        const string Password = "";
        // Destination XML file name
        const string DestinationFile = @".\result.xml";

        /*
        Some of advanced options available through profiles:
        (it can be single/double-quoted and contain comments.)
        {
            "profiles": [
                {
                    "profile1": {
                        "SaveImages": "None", // Whether to extract images. Values: "None", "Embed".
                        "ImageFormat": "PNG", // Image format for extracted images. Values: "PNG", "JPEG", "GIF", "BMP".
                        "SaveVectors": false, // Whether to extract vector objects (vertical and horizontal lines). Values: true / false
                        "ExtractInvisibleText": true, // Invisible text extraction. Values: true / false
                        "ExtractShadowLikeText": true, // Shadow-like text extraction. Values: true / false
                        "LineGroupingMode": "None", // Values: "None", "GroupByRows", "GroupByColumns", "JoinOrphanedRows"
                        "ColumnDetectionMode": "ContentGroupsAndBorders", // Values: "ContentGroupsAndBorders", "ContentGroups", "Borders", "BorderedTables"
                        "Unwrap": false, // Unwrap grouped text in table cells. Values: true / false
                        "ShrinkMultipleSpaces": false, // Shrink multiple spaces in table cells that affect column detection. Values: true / false
                        "DetectNewColumnBySpacesRatio": 1, // Spacing ratio that affects column detection.
                        "CustomExtractionColumns": [ 0, 50, 150, 200, 250, 300 ], // Explicitly specify columns coordinates for table extraction.
                        "CheckPermissions": true, // Ignore document permissions. Values: true / false
                    }
                }
            ]
        }
        */

        // Sample profile that sets advanced conversion options
        // Advanced options are properties of XMLExtractor class from ByteScout XML Extractor SDK used in the back-end:
        // https://cdn.bytescout.com/help/BytescoutPDFExtractorSDK/html/6f2b5e9c-ba15-f9fe-192b-c3e31ec4a0ee.htm
        static string Profiles = File.ReadAllText("profile.json");

        static void Main(string[] args)
        {
            // Create standard .NET web client instance
            WebClient webClient = new WebClient();

            // Set API Key
            webClient.Headers.Add("x-api-key", API_KEY);

            // URL for `PDF To XML` API call
            string url = "https://api.pdf.co/v1/pdf/convert/to/xml";

            // Prepare requests params as JSON
            Dictionary<string, object> parameters = new Dictionary<string, object>();
            parameters.Add("name", Path.GetFileName(DestinationFile));
            parameters.Add("password", Password);
            parameters.Add("pages", Pages);
            parameters.Add("url", SourceFileUrl);
            parameters.Add("profiles", Profiles);

            // Convert dictionary of params to JSON
            string jsonPayload = JsonConvert.SerializeObject(parameters);

            try
            {
                // Execute POST request with JSON payload
                string response = webClient.UploadString(url, jsonPayload);

                // Parse JSON response
                JObject json = JObject.Parse(response);

                if (json["error"].ToObject<bool>() == false)
                {
                    // Get URL of generated XML file
                    string resultFileUrl = json["url"].ToString();

                    // Download XML file
                    webClient.DownloadFile(resultFileUrl, DestinationFile);

                    Console.WriteLine("Generated XML file saved as \"{0}\" file.", DestinationFile);
                }
                else
                {
                    Console.WriteLine(json["message"].ToString());
                }
            }
            catch (WebException e)
            {
                Console.WriteLine(e.ToString());
            }

            webClient.Dispose();

            Console.WriteLine();
            Console.WriteLine("Press any key...");
            Console.ReadKey();
        }
    }
}