using Microsoft.Extensions.Primitives;
using System.Threading;
using Yarp.ReverseProxy.Configuration;

namespace YuanXuan.IM.Api.Proxy
{
    /// <summary>
    /// 代理配置
    /// </summary>
    public class ProxyConfig : IProxyConfig
    {
        private static CancellationTokenSource _cts = new CancellationTokenSource();

        public ProxyConfig(IReadOnlyList<RouteConfig> routes, IReadOnlyList<ClusterConfig> clusters, DateTime timestamp)
        {
            Routes = routes;
            Clusters = clusters;
            Timestamp = timestamp;
        }

        public IReadOnlyList<RouteConfig> Routes { get; }
        public IReadOnlyList<ClusterConfig> Clusters { get; }
        public DateTime Timestamp { get; }
        public IChangeToken ChangeToken => new CancellationChangeToken(_cts.Token);

        /// <summary>
        /// 通知配置变更
        /// </summary>
        public static void SignalChange()
        {
            var oldCts = Interlocked.Exchange(ref _cts, new CancellationTokenSource());
            oldCts.Cancel();
        }
    }
}