using System;
using System.Collections.Generic;

namespace Server.Items
{
  /// <summary>
  ///   Gain a defensive advantage over your primary opponent for a short time.
  /// </summary>
  public class Feint : WeaponAbility
  {
    public static Dictionary<Mobile, FeintTimer> Registry{ get; } = new Dictionary<Mobile, FeintTimer>();

    public override int BaseMana => 30;

    public override bool CheckSkills(Mobile from)
    {
      if (GetSkill(from, SkillName.Ninjitsu) < 50.0 && GetSkill(from, SkillName.Bushido) < 50.0)
      {
        from.SendLocalizedMessage(1063347,
          "50"); // You need ~1_SKILL_REQUIREMENT~ Bushido or Ninjitsu skill to perform that attack!
        return false;
      }

      return base.CheckSkills(from);
    }

    public override void OnHit(Mobile attacker, Mobile defender, int damage)
    {
      if (!Validate(attacker) || !CheckMana(attacker, true))
        return;

      if (Registry.TryGetValue(defender, out FeintTimer timer))
      {
        timer.Stop();
        Registry.Remove(defender);
      }

      ClearCurrentAbility(attacker);

      attacker.SendLocalizedMessage(1063360); // You baffle your target with a feint!
      defender.SendLocalizedMessage(1063361); // You were deceived by an attacker's feint!

      attacker.FixedParticles(0x3728, 1, 13, 0x7F3, 0x962, 0, EffectLayer.Waist);

      timer = new FeintTimer(defender,
        (int)(20.0 + 3.0 * (Math.Max(attacker.Skills.Ninjitsu.Value,
                              attacker.Skills.Bushido.Value) - 50.0) / 7.0)); //20-50 % decrease

      timer.Start();
      Registry.Add(defender, timer);
    }

    public class FeintTimer : Timer
    {
      private Mobile m_Defender;

      public FeintTimer(Mobile defender, int swingSpeedReduction)
        : base(TimeSpan.FromSeconds(6.0))
      {
        m_Defender = defender;
        SwingSpeedReduction = swingSpeedReduction;
        Priority = TimerPriority.FiftyMS;
      }

      public int SwingSpeedReduction{ get; }

      protected override void OnTick()
      {
        Registry.Remove(m_Defender);
      }
    }
  }
}