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

namespace Server.Spells.Necromancy
{
  public class CurseWeaponSpell : NecromancerSpell
  {
    private static SpellInfo m_Info = new SpellInfo(
      "Curse Weapon", "An Sanct Gra Char",
      203,
      9031,
      Reagent.PigIron
    );

    private static Dictionary<BaseWeapon, ExpireTimer> m_Table = new Dictionary<BaseWeapon, ExpireTimer>();

    public CurseWeaponSpell(Mobile caster, Item scroll = null) : base(caster, scroll, m_Info)
    {
    }

    public override TimeSpan CastDelayBase => TimeSpan.FromSeconds(0.75);

    public override double RequiredSkill => 0.0;
    public override int RequiredMana => 7;

    public override void OnCast()
    {
      if (!(Caster.Weapon is BaseWeapon weapon) || weapon is Fists)
      {
        Caster.SendLocalizedMessage(501078); // You must be holding a weapon.
      }
      else if (CheckSequence())
      {
        /* Temporarily imbues a weapon with a life draining effect.
         * Half the damage that the weapon inflicts is added to the necromancer's health.
         * The effects lasts for (Spirit Speak skill level / 34) + 1 seconds.
         *
         * NOTE: Above algorithm is fixed point, should be :
         * (Spirit Speak skill level / 3.4) + 1
         *
         * TODO: What happens if you curse a weapon then give it to someone else? Should they get the drain effect?
         */

        Caster.PlaySound(0x387);
        Caster.FixedParticles(0x3779, 1, 15, 9905, 32, 2, EffectLayer.Head);
        Caster.FixedParticles(0x37B9, 1, 14, 9502, 32, 5, (EffectLayer)255);
        new SoundEffectTimer(Caster).Start();

        TimeSpan duration = TimeSpan.FromSeconds(Caster.Skills.SpiritSpeak.Value / 3.4 + 1.0);

        m_Table.TryGetValue(weapon, out ExpireTimer timer);
        timer?.Stop();

        weapon.Cursed = true;
        m_Table[weapon] = timer = new ExpireTimer(weapon, duration);

        timer.Start();
      }

      FinishSequence();
    }

    private class ExpireTimer : Timer
    {
      private BaseWeapon m_Weapon;

      public ExpireTimer(BaseWeapon weapon, TimeSpan delay) : base(delay)
      {
        m_Weapon = weapon;
        Priority = TimerPriority.OneSecond;
      }

      protected override void OnTick()
      {
        m_Weapon.Cursed = false;
        Effects.PlaySound(m_Weapon.GetWorldLocation(), m_Weapon.Map, 0xFA);
        m_Table.Remove(m_Weapon);
      }
    }

    private class SoundEffectTimer : Timer
    {
      private Mobile m_Mobile;

      public SoundEffectTimer(Mobile m) : base(TimeSpan.FromSeconds(0.75))
      {
        m_Mobile = m;
        Priority = TimerPriority.FiftyMS;
      }

      protected override void OnTick()
      {
        m_Mobile.PlaySound(0xFA);
      }
    }
  }
}