using System;

namespace Roy_T.AStar.Primitives
{
    public struct Duration : IComparable<Duration>, IEquatable<Duration>
    {
        public static Duration Zero => new Duration(0);

        private Duration(float seconds)
        {
            this.Seconds = seconds;
        }

        public float Seconds { get; }

        public static Duration FromSeconds(float seconds) => new Duration(seconds);

        public static Duration operator +(Duration a, Duration b)
            => new Duration(a.Seconds + b.Seconds);

        public static Duration operator -(Duration a, Duration b)
            => new Duration(a.Seconds - b.Seconds);

        public static bool operator >(Duration a, Duration b)
            => a.Seconds > b.Seconds;

        public static bool operator <(Duration a, Duration b)
            => a.Seconds < b.Seconds;

        public static bool operator >=(Duration a, Duration b)
            => a.Seconds >= b.Seconds;

        public static bool operator <=(Duration a, Duration b)
            => a.Seconds <= b.Seconds;

        public static bool operator ==(Duration a, Duration b)
            => a.Equals(b);

        public static bool operator !=(Duration a, Duration b)
            => !a.Equals(b);

        public override string ToString() => $"{this.Seconds:F2}s";

        public override bool Equals(object obj) => obj is Duration duration && this.Equals(duration);

        public bool Equals(Duration other) => this.Seconds == other.Seconds;

        public int CompareTo(Duration other) => this.Seconds.CompareTo(other.Seconds);

        public override int GetHashCode() => -1609761766 + this.Seconds.GetHashCode();
    }
}