using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Collections.Generic;

public class DsiClient {
    private static readonly HttpClient client = new HttpClient();
    private const string BaseUrl = "https://fake-api.devsecit.com/1.0.0/wb/";
    private const string AppToken = "PgcQqi8ZGmlnYwd50JKo74_secure_token_2024";

    public async Task CallApi(string method, string table, Dictionary extraData = null) {
        var token = Convert.ToBase64String(Encoding.UTF8.GetBytes(AppToken));
        var ts = Convert.ToBase64String(Encoding.UTF8.GetBytes(DateTimeOffset.UtcNow.ToUnixTimeSeconds().ToString()));

        var payload = new Dictionary {
            { "token", token },
            { "timestmp", ts },
            { "method", method },
            { "table", table }
        };

        if (extraData != null) foreach (var kv in extraData) payload[kv.Key] = kv.Value;

        var content = new FormUrlEncodedContent(payload);
        client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", "YOUR_SECRET");

        var response = await client.PostAsync(BaseUrl, content);
        return await response.Content.ReadAsStringAsync();
    }
}