using System;

namespace PKHeX.Core;

/// <summary>
/// Generation 2 Time of Encounter enum
/// </summary>
[Flags]
internal enum EncounterTime : byte
{
    Any = 0,
    Morning = 1 << 1,
    Day = 1 << 2,
    Night = 1 << 3,
}

internal static class EncounterTimeExtension
{
    internal static bool Contains(this EncounterTime t1, int t2) => t1 == EncounterTime.Any || (t1 & (EncounterTime)(1 << t2)) != 0;

    internal static int RandomValidTime(this EncounterTime t1)
    {
        var rnd = Util.Rand;
        int val = rnd.Next(1, 4);
        if (t1 == EncounterTime.Any)
            return val;
        while (!t1.Contains(val))
            val = rnd.Next(1, 4);
        return val;
    }
}