using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Tango.Telemetry;

namespace Tango.TelemetryTester.CLI
{
    public class MockDestinationWithFailure : ITelemetryDestination
    {
        public string Name { get; set; }
        public List<string> ReceivedPayloads { get; } = new List<string>();
        public int FailCountRemaining { get; private set; }
        public int TotalAttempts { get; private set; } = 0;

        public MockDestinationWithFailure(string name, int failCount)
        {
            Name = name;
            FailCountRemaining = failCount;
        }

        public IReadOnlyList<TelemetrySourceTypes> SupportedSourceTypes => new[]
        {
            TelemetrySourceTypes.Streaming,
            TelemetrySourceTypes.ExternalStorage,
            TelemetrySourceTypes.PendingStorage
        };

        public Task<bool> IsAvailable() => Task.FromResult(true);

        public Task Publish(TelemetryPublishPackage package, List<KeyValuePair<string, string>> properties)
        {
            TotalAttempts++;
            if (FailCountRemaining-- > 0)
            {
                throw new Exception("Simulated publish failure");
            }

            var payload = package.ToPayload();
            ReceivedPayloads.Add(payload);
            Logger.LogInfo($"Destination '{Name}' received payload: {payload}");
            return Task.CompletedTask;
        }

        public void Dispose() { }
    }
}