using System;

namespace Server.Items
{
    public enum MoonPhase
    {
        NewMoon,
        WaxingCrescentMoon,
        FirstQuarter,
        WaxingGibbous,
        FullMoon,
        WaningGibbous,
        LastQuarter,
        WaningCrescent
    }

    [Flippable(0x104B, 0x104C)]
    public class Clock : Item
    {
        public const double SecondsPerUOMinute = 5.0;
        public const double MinutesPerUODay = SecondsPerUOMinute * 24;

        private static readonly DateTime WorldStart = new(1997, 9, 1);

        [Constructible]
        public Clock(int itemID = 0x104B) : base(itemID) => Weight = 3.0;

        public Clock(Serial serial) : base(serial)
        {
        }

        public static DateTime ServerStart { get; private set; }

        public static void Configure()
        {
            ServerStart = Core.Now;
        }

        public static MoonPhase GetMoonPhase(Map map, int x, int y)
        {
            GetTime(map, x, y, out _, out _, out var totalMinutes);

            if (map != null)
            {
                totalMinutes /= 10 + map.MapIndex * 20;
            }

            return (MoonPhase)(totalMinutes % 8);
        }

        public static void GetTime(Map map, int x, int y, out int hours, out int minutes)
        {
            GetTime(map, x, y, out hours, out minutes, out _);
        }

        public static void GetTime(Map map, int x, int y, out int hours, out int minutes, out int totalMinutes)
        {
            var timeSpan = Core.Now - WorldStart;

            totalMinutes = (int)(timeSpan.TotalSeconds / SecondsPerUOMinute);

            if (map != null)
            {
                totalMinutes += map.MapIndex * 320;
            }

            // Really on OSI this must be by subserver
            totalMinutes += x / 16;

            hours = totalMinutes / 60 % 24;
            minutes = totalMinutes % 60;
        }

        public static void GetTime(out int generalNumber, out string exactTime)
        {
            GetTime(null, 0, 0, out generalNumber, out exactTime);
        }

        public static void GetTime(Mobile from, out int generalNumber, out string exactTime)
        {
            GetTime(from.Map, from.X, from.Y, out generalNumber, out exactTime);
        }

        public static void GetTime(Map map, int x, int y, out int generalNumber, out string exactTime)
        {
            GetTime(map, x, y, out var hours, out int minutes);

            // 00:00 AM - 00:59 AM : Witching hour
            // 01:00 AM - 03:59 AM : Middle of night
            // 04:00 AM - 07:59 AM : Early morning
            // 08:00 AM - 11:59 AM : Late morning
            // 12:00 PM - 12:59 PM : Noon
            // 01:00 PM - 03:59 PM : Afternoon
            // 04:00 PM - 07:59 PM : Early evening
            // 08:00 PM - 11:59 AM : Late at night

            if (hours >= 20)
            {
                generalNumber = 1042957; // It's late at night
            }
            else if (hours >= 16)
            {
                generalNumber = 1042956; // It's early in the evening
            }
            else if (hours >= 13)
            {
                generalNumber = 1042955; // It's the afternoon
            }
            else if (hours >= 12)
            {
                generalNumber = 1042954; // It's around noon
            }
            else if (hours >= 08)
            {
                generalNumber = 1042953; // It's late in the morning
            }
            else if (hours >= 04)
            {
                generalNumber = 1042952; // It's early in the morning
            }
            else if (hours >= 01)
            {
                generalNumber = 1042951; // It's the middle of the night
            }
            else
            {
                generalNumber = 1042950; // 'Tis the witching hour. 12 Midnight.
            }

            hours %= 12;

            if (hours == 0)
            {
                hours = 12;
            }

            exactTime = $"{hours}:{minutes:D2}";
        }

        public override void OnDoubleClick(Mobile from)
        {
            GetTime(from, out var genericNumber, out var exactTime);

            SendLocalizedMessageTo(from, genericNumber);
            SendLocalizedMessageTo(from, 1042958, exactTime); // ~1_TIME~ to be exact
        }

        public override void Serialize(IGenericWriter writer)
        {
            base.Serialize(writer);

            writer.Write(0); // version
        }

        public override void Deserialize(IGenericReader reader)
        {
            base.Deserialize(reader);

            var version = reader.ReadInt();
        }
    }

    [Flippable(0x104B, 0x104C)]
    public class ClockRight : Clock
    {
        [Constructible]
        public ClockRight()
        {
        }

        public ClockRight(Serial serial) : base(serial)
        {
        }

        public override void Serialize(IGenericWriter writer)
        {
            base.Serialize(writer);

            writer.Write(0); // version
        }

        public override void Deserialize(IGenericReader reader)
        {
            base.Deserialize(reader);

            var version = reader.ReadInt();
        }
    }

    [Flippable(0x104B, 0x104C)]
    public class ClockLeft : Clock
    {
        [Constructible]
        public ClockLeft() : base(0x104C)
        {
        }

        public ClockLeft(Serial serial) : base(serial)
        {
        }

        public override void Serialize(IGenericWriter writer)
        {
            base.Serialize(writer);

            writer.Write(0); // version
        }

        public override void Deserialize(IGenericReader reader)
        {
            base.Deserialize(reader);

            var version = reader.ReadInt();
        }
    }
}