using System;
using Server.Items;

namespace Server.Mobiles
{
  public class ShadowFiend : BaseCreature
  {
    private UnhideTimer m_Timer;

    [Constructible]
    public ShadowFiend() : base(AIType.AI_Melee, FightMode.Closest, 10, 1, 0.2, 0.4)
    {
      Body = 0xA8;

      // this to allow shadow fiend to loot from corpses
      Backpack backpack = new Backpack();
      backpack.Movable = false;
      AddItem(backpack);

      SetStr(46, 55);
      SetDex(121, 130);
      SetInt(46, 55);

      SetHits(28, 33);
      SetStam(46, 55);

      SetDamage(10, 22);

      SetDamageType(ResistanceType.Physical, 20);
      SetDamageType(ResistanceType.Cold, 80);

      SetResistance(ResistanceType.Physical, 20, 25);
      SetResistance(ResistanceType.Fire, 20, 25);
      SetResistance(ResistanceType.Cold, 40, 45);
      SetResistance(ResistanceType.Poison, 60, 70);
      SetResistance(ResistanceType.Energy, 5, 10);

      SetSkill(SkillName.MagicResist, 20.1, 30.0);
      SetSkill(SkillName.Tactics, 20.1, 30.0);
      SetSkill(SkillName.Wrestling, 20.1, 30.0);

      Fame = 1000;
      Karma = -1000;

      m_Timer = new UnhideTimer(this);
      m_Timer.Start();
    }

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

    public override bool DeleteCorpseOnDeath => true;

    public override string DefaultName => "a shadow fiend";

    public override bool CanRummageCorpses => true;

    public override int GetIdleSound()
    {
      return 0x37A;
    }

    public override int GetAngerSound()
    {
      return 0x379;
    }

    public override int GetDeathSound()
    {
      return 0x381;
    }

    public override int GetAttackSound()
    {
      return 0x37F;
    }

    public override int GetHurtSound()
    {
      return 0x380;
    }

    public override bool OnBeforeDeath()
    {
      Backpack?.Destroy();

      Effects.SendLocationEffect(Location, Map, 0x376A, 10, 1);
      return true;
    }

    public override void Serialize(GenericWriter writer)
    {
      base.Serialize(writer);
      writer.Write(0);
    }

    public override void Deserialize(GenericReader reader)
    {
      base.Deserialize(reader);
      int version = reader.ReadInt();

      m_Timer = new UnhideTimer(this);
      m_Timer.Start();
    }

    public override void OnAfterDelete()
    {
      m_Timer?.Stop();

      m_Timer = null;

      base.OnAfterDelete();
    }

    private class UnhideTimer : Timer
    {
      private ShadowFiend m_Owner;

      public UnhideTimer(ShadowFiend owner) : base(TimeSpan.FromSeconds(30.0))
      {
        m_Owner = owner;
        Priority = TimerPriority.OneSecond;
      }

      protected override void OnTick()
      {
        if (m_Owner.Deleted)
        {
          Stop();
          return;
        }

        foreach (Mobile m in m_Owner.GetMobilesInRange(3))
          if (m != m_Owner && m.Player && m.Hidden && m_Owner.CanBeHarmful(m) &&
              m.AccessLevel == AccessLevel.Player)
            m.Hidden = false;
      }
    }
  }
}