Rate Limiting

using System.Text.Json;

public class BifrostClient
{
    private readonly HttpClient _client;
    private const string ApiUrl = "https://api.dev.bifrostgaming.com/v1/graphql";
    private const int MaxRetries = 3;

    public BifrostClient(string accessToken)
    {
        _client = new HttpClient();
        _client.DefaultRequestHeaders.Add("Authorization", $"Bearer {accessToken}");
    }

    public async Task<JsonDocument> QueryAsync(string query, object? variables = null)
    {
        var payload = variables != null
            ? new { query, variables }
            : (object)new { query };

        for (int attempt = 0; attempt < MaxRetries; attempt++)
        {
            var response = await _client.PostAsJsonAsync(ApiUrl, payload);

            if (response.IsSuccessStatusCode)
            {
                var json = await response.Content.ReadAsStringAsync();
                return JsonDocument.Parse(json);
            }

            if (response.StatusCode == System.Net.HttpStatusCode.TooManyRequests)
            {
                // Parse the retryAfter value from the GraphQL error response
                var errorJson = await response.Content.ReadAsStringAsync();
                var errorDoc = JsonDocument.Parse(errorJson);
                var retryAfter = 30; // fallback

                if (errorDoc.RootElement.TryGetProperty("errors", out var errors))
                {
                    foreach (var error in errors.EnumerateArray())
                    {
                        if (error.TryGetProperty("extensions", out var ext) &&
                            ext.TryGetProperty("retryAfter", out var ra))
                        {
                            retryAfter = ra.GetInt32();
                            break;
                        }
                    }
                }

                Console.WriteLine(
                    $"Rate limited. Waiting {retryAfter}s " +
                    $"(attempt {attempt + 1}/{MaxRetries})");
                await Task.Delay(TimeSpan.FromSeconds(retryAfter));
                continue;
            }

            // Other error — do not retry
            response.EnsureSuccessStatusCode();
        }

        throw new Exception("Max retries exceeded due to rate limiting");
    }
}

// Usage
var client = new BifrostClient("your_token_here");
var result = await client.QueryAsync(
    @"{ guildGetGameState(serverId: ""abc"", gameType: ""HLL"") { data } }"
);
Console.WriteLine(result.RootElement);