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 = "***********************************";


        // Result file name
        const string ResultFileName = @".\barcode.png";
        // Barcode type. See valid barcode types in the documentation https://secure.bytescout.com/cloudapi.html#api-Default-barcodeGenerateGet
        const string BarcodeType = "Code128";
        // Barcode value
        const string BarcodeValue = "qweasd123456";


        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);

            // Prepare requests params as JSON
            // See documentation: https://apidocs.pdf.co/#barcode-generator
            Dictionary<string, string> parameters = new Dictionary<string, string>();
            parameters.Add("name", Path.GetFileName(ResultFileName));
            parameters.Add("type", BarcodeType);
            parameters.Add("value", BarcodeValue);
            // Convert dictionary of params to JSON
            string jsonPayload = JsonConvert.SerializeObject(parameters);

            try
            {
                // URL of "Barcode Generator" endpoint
                string url = "https://api.pdf.co/v1/barcode/generate";

                // 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 barcode image file
                    string resultFileURI = json["url"].ToString();

                    // Download generated image file
                    webClient.DownloadFile(resultFileURI, ResultFileName);

                    Console.WriteLine("Generated barcode saved to \"{0}\" file.", ResultFileName);
                }
                else
                {
                    Console.WriteLine(json["message"].ToString());
                }
            }
            catch (WebException e)
            {
                Console.WriteLine(e.ToString());
            }
            finally
            {
                webClient.Dispose();
            }


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