ModernUO/Projects/UOContent/Items/Lights/BaseLight.cs

using System;

namespace Server.Items
{
    public abstract class BaseLight : Item
    {
        public static readonly bool Burnout = false;
        private bool m_Burning;
        private TimeSpan m_Duration = TimeSpan.Zero;
        private DateTime m_End;
        private Timer m_Timer;

        [Constructible]
        public BaseLight(int itemID) : base(itemID)
        {
        }

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

        public abstract int LitItemID { get; }

        public virtual int UnlitItemID => 0;
        public virtual int BurntOutItemID => 0;

        public virtual int LitSound => 0x47;
        public virtual int UnlitSound => 0x3be;
        public virtual int BurntOutSound => 0x4b8;

        [CommandProperty(AccessLevel.GameMaster)]
        public bool Burning
        {
            get => m_Burning;
            set
            {
                if (m_Burning != value)
                {
                    m_Burning = true;
                    DoTimer(m_Duration);
                }
            }
        }

        [CommandProperty(AccessLevel.GameMaster)]
        public bool BurntOut { get; set; }

        [CommandProperty(AccessLevel.GameMaster)]
        public bool Protected { get; set; }

        [CommandProperty(AccessLevel.GameMaster)]
        public TimeSpan Duration
        {
            get => m_Duration != TimeSpan.Zero && m_Burning ? m_End - Core.Now : m_Duration;
            set => m_Duration = value;
        }

        public virtual void PlayLitSound()
        {
            if (LitSound != 0)
            {
                var loc = GetWorldLocation();
                Effects.PlaySound(loc, Map, LitSound);
            }
        }

        public virtual void PlayUnlitSound()
        {
            var sound = UnlitSound;

            if (BurntOut && BurntOutSound != 0)
            {
                sound = BurntOutSound;
            }

            if (sound != 0)
            {
                var loc = GetWorldLocation();
                Effects.PlaySound(loc, Map, sound);
            }
        }

        public virtual void Ignite()
        {
            if (!BurntOut)
            {
                PlayLitSound();

                m_Burning = true;
                ItemID = LitItemID;
                DoTimer(m_Duration);
            }
        }

        public virtual void Douse()
        {
            m_Burning = false;

            if (BurntOut && BurntOutItemID != 0)
            {
                ItemID = BurntOutItemID;
            }
            else
            {
                ItemID = UnlitItemID;
            }

            if (BurntOut)
            {
                m_Duration = TimeSpan.Zero;
            }
            else if (m_Duration != TimeSpan.Zero)
            {
                m_Duration = m_End - Core.Now;
            }

            m_Timer?.Stop();

            PlayUnlitSound();
        }

        public virtual void Burn()
        {
            BurntOut = true;
            Douse();
        }

        private void DoTimer(TimeSpan delay)
        {
            m_Duration = delay;

            m_Timer?.Stop();

            if (delay == TimeSpan.Zero)
            {
                return;
            }

            m_End = Core.Now + delay;

            m_Timer = new InternalTimer(this, delay);
            m_Timer.Start();
        }

        public override void OnDoubleClick(Mobile from)
        {
            if (BurntOut)
            {
                return;
            }

            if (Protected && from.AccessLevel == AccessLevel.Player)
            {
                return;
            }

            if (!from.InRange(GetWorldLocation(), 2))
            {
                return;
            }

            if (m_Burning)
            {
                if (UnlitItemID != 0)
                {
                    Douse();
                }
            }
            else
            {
                Ignite();
            }
        }

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

            writer.Write(0);
            writer.Write(BurntOut);
            writer.Write(m_Burning);
            writer.Write(m_Duration);
            writer.Write(Protected);

            if (m_Burning && m_Duration != TimeSpan.Zero)
            {
                writer.WriteDeltaTime(m_End);
            }
        }

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

            var version = reader.ReadInt();

            switch (version)
            {
                case 0:
                    {
                        BurntOut = reader.ReadBool();
                        m_Burning = reader.ReadBool();
                        m_Duration = reader.ReadTimeSpan();
                        Protected = reader.ReadBool();

                        if (m_Burning && m_Duration != TimeSpan.Zero)
                        {
                            DoTimer(reader.ReadDeltaTime() - Core.Now);
                        }

                        break;
                    }
            }
        }

        private class InternalTimer : Timer
        {
            private readonly BaseLight m_Light;

            public InternalTimer(BaseLight light, TimeSpan delay) : base(delay)
            {
                m_Light = light;
            }

            protected override void OnTick()
            {
                if (m_Light?.Deleted == false)
                {
                    m_Light.Burn();
                }
            }
        }
    }
}