using System;
using System.Collections.Generic;

namespace Server.Items
{
  /// <summary>
  ///   Attack faster as you swing with both weapons.
  /// </summary>
  public class DualWield : WeaponAbility
  {
    public static Dictionary<Mobile, DualWieldTimer> Registry{ get; } = new Dictionary<Mobile, DualWieldTimer>();

    public override int BaseMana => 30;

    public override bool CheckSkills(Mobile from)
    {
      if (GetSkill(from, SkillName.Ninjitsu) < 50.0)
      {
        from.SendLocalizedMessage(1063352,
          "50"); // You need ~1_SKILL_REQUIREMENT~ 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(attacker, out DualWieldTimer timer))
      {
        timer.Stop();
        Registry.Remove(attacker);
      }

      ClearCurrentAbility(attacker);

      attacker.SendLocalizedMessage(1063362); // You dually wield for increased speed!
      attacker.FixedParticles(0x3779, 1, 15, 0x7F6, 0x3E8, 3, EffectLayer.LeftHand);

      timer = new DualWieldTimer(attacker,
        (int)(20.0 + 3.0 * (attacker.Skills.Ninjitsu.Value - 50.0) / 7.0)); //20-50 % increase

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

    public class DualWieldTimer : Timer
    {
      private Mobile m_Owner;

      public DualWieldTimer(Mobile owner, int bonusSwingSpeed)
        : base(TimeSpan.FromSeconds(6.0))
      {
        m_Owner = owner;
        BonusSwingSpeed = bonusSwingSpeed;
        Priority = TimerPriority.FiftyMS;
      }

      public int BonusSwingSpeed{ get; }

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