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
      {
        if (m_Duration != TimeSpan.Zero && m_Burning) return m_End - DateTime.UtcNow;

        return m_Duration;
      }

      set => m_Duration = value;
    }

    public virtual void PlayLitSound()
    {
      if (LitSound != 0)
      {
        Point3D loc = GetWorldLocation();
        Effects.PlaySound(loc, Map, LitSound);
      }
    }

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

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


      if (sound != 0)
      {
        Point3D 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 - DateTime.UtcNow;

      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 = DateTime.UtcNow + 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);

      int 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() - DateTime.UtcNow);

          break;
        }
      }
    }

    private class InternalTimer : Timer
    {
      private BaseLight m_Light;

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

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