//using Logging;
//using System.Globalization;

//namespace DistTestCore.Metrics
//{
//    public class MetricsDownloader
//    {
//        private readonly BaseLog log;

//        public MetricsDownloader(BaseLog log)
//        {
//            this.log = log;
//        }

//        public void DownloadAllMetricsForNode(string nodeName, MetricsAccess access)
//        {
//            var metrics = access.GetAllMetrics();
//            if (metrics == null || metrics.Sets.Length == 0 || metrics.Sets.All(s => s.Values.Length == 0)) return;

//            var headers = new[] { "timestamp" }.Concat(metrics.Sets.Select(s => s.Name)).ToArray();
//            var map = CreateValueMap(metrics);

//            WriteToFile(nodeName, headers, map);
//        }

//        private void WriteToFile(string nodeName, string[] headers, Dictionary<DateTime, List<string>> map)
//        {
//            var file = log.CreateSubfile("csv");
//            log.Log($"Downloading metrics for {nodeName} to file {file.FullFilename}");

//            file.WriteRaw(string.Join(",", headers));

//            foreach (var pair in map)
//            {
//                file.WriteRaw(string.Join(",", new[] { FormatTimestamp(pair.Key) }.Concat(pair.Value)));
//            }
//        }

//        private Dictionary<DateTime, List<string>> CreateValueMap(Metrics metrics)
//        {
//            var map = CreateForAllTimestamps(metrics);
//            foreach (var metric in metrics.Sets)
//            {
//                AddToMap(map, metric);
//            }
//            return map;

//        }

//        private Dictionary<DateTime, List<string>> CreateForAllTimestamps(Metrics metrics)
//        {
//            var result = new Dictionary<DateTime, List<string>>();
//            var timestamps = metrics.Sets.SelectMany(s => s.Values).Select(v => v.Timestamp).Distinct().ToArray();
//            foreach (var timestamp in timestamps) result.Add(timestamp, new List<string>());
//            return result;
//        }

//        private void AddToMap(Dictionary<DateTime, List<string>> map, MetricsSet metric)
//        {
//            foreach (var key in map.Keys)
//            {
//                map[key].Add(GetValueAtTimestamp(key, metric));
//            }
//        }

//        private string GetValueAtTimestamp(DateTime key, MetricsSet metric)
//        {
//            var value = metric.Values.SingleOrDefault(v => v.Timestamp == key);
//            if (value == null) return "";
//            return value.Value.ToString(CultureInfo.InvariantCulture);
//        }

//        private string FormatTimestamp(DateTime key)
//        {
//            var origin = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
//            var diff = key - origin;
//            return Math.Floor(diff.TotalSeconds).ToString(CultureInfo.InvariantCulture);
//        }
//    }
//}