using System.Text;

namespace InnovEnergy.Time.Unix;

public readonly partial struct UnixTimeSpan
{
    public override String ToString()
    {
        var sb = new StringBuilder();
        var dt = ToTimeSpan();

        var weeks = dt.Days / 7;
        var days  = dt.Days % 7;

        if (weeks > 0)
        {
            sb.Append(weeks);
            sb.Append("w ");
        }
        if (days > 0)
        {
            sb.Append(days);
            sb.Append("d ");
        }
        if (dt.Hours > 0)
        {
            sb.Append(dt.Hours);
            sb.Append("h ");
        }
        if (dt.Minutes > 0)
        {
            sb.Append(dt.Minutes);
            sb.Append("m ");
        }
        if (dt.Seconds > 0)
        {
            sb.Append(dt.Seconds);
            sb.Append("s");
        }

        return sb.ToString().Trim();
    }

    public override Boolean Equals(Object? obj) => obj is UnixTime other && Ticks == other.Ticks;

    public override Int32 GetHashCode() => (Int32) (Ticks & 0x7F_FF_FF_FF);

    public static UnixTimeSpan Forever { get; } = FromTicks(UInt32.MaxValue) / 1.Weeks() * 1.Weeks();

}