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// Copyright (c) 2010-2017 Charlie Poole
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using System;
using System.Diagnostics;
using NUnit.Compatibility;
using NUnit.Framework.Interfaces;

namespace NUnit.Framework.Internal.Commands
{
    /// <summary>
    /// TODO: Documentation needed for class
    /// </summary>
    public class MaxTimeCommand : AfterTestCommand
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="MaxTimeCommand"/> class.
        /// </summary>
        /// <param name="innerCommand">The inner command.</param>
        /// <param name="maxTime">The max time allowed in milliseconds</param>
        public MaxTimeCommand(TestCommand innerCommand, int maxTime)
            : base(innerCommand)
        {
            AfterTest = (context) =>
            {
                // TODO: This command duplicates the calculation of the
                // duration of the test because that calculation is 
                // normally performed at a higher level. Most likely,
                // we should move the maxtime calculation to the
                // higher level eventually.

                long tickCount = Stopwatch.GetTimestamp() - context.StartTicks;
                double seconds = (double)tickCount / Stopwatch.Frequency;
                TestResult result = context.CurrentResult;

                result.Duration = seconds;

                if (result.ResultState == ResultState.Success)
                {
                    double elapsedTime = result.Duration * 1000d;

                    if (elapsedTime > maxTime)
                        result.SetResult(ResultState.Failure,
                            string.Format("Elapsed time of {0}ms exceeds maximum of {1}ms",
                                elapsedTime, maxTime));
                }
            };
        }
    }
}