using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace Content1FetchExample
{
    class Program
    {
        static async Task Main(string[] args)
        {
            // Replace these values with your actual credentials
            var userGLN = "{{your GLN}}";
            var appID = "{{your appid}}";
            var secretKey = "{{your secret key}}";
            var pageSize = "1"; // Default is 1000, max is 1000

            var timestamp = DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssZ");

            var uri = $"/V1/product/fetch?timestamp={timestamp}&pageSize={pageSize}";
            var encoding = Encoding.UTF8;

            using (var httpClient = new HttpClient())
            {


                httpClient.BaseAddress = new Uri("https://content1-api.1worldsync.com");
                httpClient.DefaultRequestHeaders.Add("appId", appID);

                // Create a JSON content with an empty body
                string jsonString = "{ \"targetMarket\": \"US\" }";
                var content = new StringContent(jsonString, Encoding.UTF8, "application/json");

                // Calculate the HMACSHA256 hash
                using (var hmac = new HMACSHA256(encoding.GetBytes(secretKey)))
                {
                    var hashBytes = hmac.ComputeHash(encoding.GetBytes(uri));
                    var hashInBase64 = Convert.ToBase64String(hashBytes);

                    httpClient.DefaultRequestHeaders.Add("hashcode", hashInBase64);
                }

                var response = await httpClient.PostAsync(uri, content);

                if (response.IsSuccessStatusCode)
                {
                    var responseContent = await response.Content.ReadAsStringAsync();
                    Console.WriteLine("Response:");
                    Console.WriteLine(responseContent);
                }
                else
                {
                    Console.WriteLine($"HTTP Error: {response.StatusCode} - {response.ReasonPhrase}");
                }
            }
        }
    }
}