// <copyright file="SystemClock.cs" company="Selenium Committers">
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
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// </copyright>

using System;

#nullable enable

namespace OpenQA.Selenium.Support.UI
{
    /// <summary>
    /// Uses the system clock to calculate time for timeouts.
    /// </summary>
    public class SystemClock : IClock
    {
        /// <summary>
        /// Gets the current date and time values.
        /// </summary>
        public DateTime Now => DateTime.Now;

        /// <summary>
        /// Calculates the date and time values after a specific delay.
        /// </summary>
        /// <param name="delay">The delay after to calculate.</param>
        /// <returns>The future date and time values.</returns>
        public DateTime LaterBy(TimeSpan delay) => DateTime.Now.Add(delay);

        /// <summary>
        /// Gets a value indicating whether the current date and time is before the specified date and time.
        /// </summary>
        /// <param name="otherDateTime">The date and time values to compare the current date and time values to.</param>
        /// <returns><see langword="true"/> if the current date and time is before the specified date and time; otherwise, <see langword="false"/>.</returns>
        public bool IsNowBefore(DateTime otherDateTime) => DateTime.Now < otherDateTime;
    }
}
