using System;
using System.Collections.Generic;
using Server.Engines.Plants;
using Server.Items;

namespace Server.Mobiles
{
  public class Kappa : BaseCreature
  {
    private static Dictionary<Mobile, InternalTimer> m_Table = new Dictionary<Mobile, InternalTimer>();

    [Constructible]
    public Kappa() : base(AIType.AI_Melee, FightMode.Closest, 10, 1, 0.2, 0.4)
    {
      Body = 240;

      SetStr(186, 230);
      SetDex(51, 75);
      SetInt(41, 55);

      SetMana(30);

      SetHits(151, 180);

      SetDamage(6, 12);

      SetDamageType(ResistanceType.Physical, 100);

      SetResistance(ResistanceType.Physical, 35, 50);
      SetResistance(ResistanceType.Fire, 35, 50);
      SetResistance(ResistanceType.Cold, 25, 50);
      SetResistance(ResistanceType.Poison, 35, 50);
      SetResistance(ResistanceType.Energy, 20, 30);

      SetSkill(SkillName.MagicResist, 60.1, 70.0);
      SetSkill(SkillName.Tactics, 79.1, 89.0);
      SetSkill(SkillName.Wrestling, 60.1, 70.0);

      Fame = 1700;
      Karma = -1700;

      PackItem(new RawFishSteak(3));
      for (int i = 0; i < 2; i++)
        switch (Utility.Random(6))
        {
          case 0:
            PackItem(new Gears());
            break;
          case 1:
            PackItem(new Hinge());
            break;
          case 2:
            PackItem(new Axle());
            break;
        }
      if (Core.ML && Utility.RandomDouble() < .33)
        PackItem(Seed.RandomPeculiarSeed(4));
    }

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

    public override string CorpseName => "a kappa corpse";
    public override string DefaultName => "a kappa";

    public override void GenerateLoot()
    {
      AddLoot(LootPack.Meager);
      AddLoot(LootPack.Average);
    }

    public override int GetAngerSound()
    {
      return 0x50B;
    }

    public override int GetIdleSound()
    {
      return 0x50A;
    }

    public override int GetAttackSound()
    {
      return 0x509;
    }

    public override int GetHurtSound()
    {
      return 0x50C;
    }

    public override int GetDeathSound()
    {
      return 0x508;
    }

    public override void OnGaveMeleeAttack(Mobile defender)
    {
      base.OnGaveMeleeAttack(defender);

      if (Utility.RandomBool())
        if (!IsBeingDrained(defender) && Mana > 14)
        {
          defender.SendLocalizedMessage(1070848); // You feel your life force being stolen away.
          BeginLifeDrain(defender, this);
          Mana -= 15;
        }
    }

    public static bool IsBeingDrained(Mobile m)
    {
      return m_Table.ContainsKey(m);
    }

    public static void BeginLifeDrain(Mobile m, Mobile from)
    {
      m_Table.TryGetValue(m, out InternalTimer timer);
      timer?.Stop();
      m_Table[m] = timer = new InternalTimer(from, m);

      timer.Start();
    }

    public static void DrainLife(Mobile m, Mobile from)
    {
      if (m.Alive)
      {
        int damageGiven = AOS.Damage(m, from, 5, 0, 0, 0, 0, 100);
        from.Hits += damageGiven;
      }
      else
      {
        EndLifeDrain(m);
      }
    }

    public static void EndLifeDrain(Mobile m)
    {
      if (m_Table.TryGetValue(m, out InternalTimer timer))
      {
        timer?.Stop();
        m_Table.Remove(m);
        m.SendLocalizedMessage(1070849); // The drain on your life force is gone.
      }
    }

    public override void OnDamage(int amount, Mobile from, bool willKill)
    {
      if (from?.Map != null)
      {
        int amt = 0;
        Mobile target = this;
        int rand = Utility.Random(1, 100);
        if (willKill) amt = ((rand % 5) >> 2) + 3;
        if (Hits < 100 && rand < 21)
        {
          target = rand % 2 < 1 ? this : from;
          amt++;
        }

        if (amt > 0)
        {
          SpillAcid(target, amt);
          from.SendLocalizedMessage(1070820);
          if (Mana > 14)
            Mana -= 15;
        }
      }

      base.OnDamage(amount, from, willKill);
    }

    public override Item NewHarmfulItem()
    {
      return new AcidSlime(TimeSpan.FromSeconds(10), 5, 10);
    }

    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();
    }

    private class InternalTimer : Timer
    {
      private int m_Count;
      private Mobile m_From;
      private Mobile m_Mobile;

      public InternalTimer(Mobile from, Mobile m) : base(TimeSpan.FromSeconds(1.0), TimeSpan.FromSeconds(1.0))
      {
        m_From = from;
        m_Mobile = m;
        Priority = TimerPriority.TwoFiftyMS;
      }

      protected override void OnTick()
      {
        DrainLife(m_Mobile, m_From);

        if (Running && ++m_Count == 5)
          EndLifeDrain(m_Mobile);
      }
    }
  }
}