using System;
using System.Collections.Generic;
using System.Threading;

namespace JD.Core
{
    public static class Retry
    {
        public static void Do(TimeSpan retryInterval, int retryCount, Action action)
        {
            Do<object>(retryInterval, retryCount, () =>
            {
                action();
                return null;
            });
        }

        public static T Do<T>(TimeSpan retryInterval, int retryCount, Func<T> action)
        {
            var exceptions = new List<Exception>();

            for (var retry = 0; retry < retryCount; retry++)
            {
                try
                {
                    return action();
                }
                catch (Exception ex)
                {
                    exceptions.Add(ex);
                    Thread.Sleep(retryInterval);
                }
            }

            throw new AggregateException(exceptions);
        }
    }
}