using Server.SkillHandlers;
using System;
using System.Collections;

namespace Server.Spells.Ninjitsu
{
    public class SurpriseAttack : NinjaMove
    {
        private static readonly Hashtable m_Table = new Hashtable();

        public override int BaseMana => 20;
        public override double RequiredSkill => 60;
        public override TextDefinition AbilityMessage => new TextDefinition(1063128);// You prepare to surprise your prey.
        public override bool ValidatesDuringHit => false;
        public static bool GetMalus(Mobile target, ref int malus)
        {
            SurpriseAttackInfo info = m_Table[target] as SurpriseAttackInfo;

            if (info == null)
                return false;

            malus = info.m_Malus;
            return true;
        }

        public override bool Validate(Mobile from)
        {
            if (!from.Hidden || from.AllowedStealthSteps <= 0)
            {
                from.SendLocalizedMessage(1063087); // You must be in stealth mode to use this ability.
                return false;
            }

            return base.Validate(from);
        }

        public override bool OnBeforeSwing(Mobile attacker, Mobile defender)
        {
            bool valid = Validate(attacker) && CheckMana(attacker, true);

            if (valid)
            {
                attacker.BeginAction(typeof(Stealth));
                Timer.DelayCall(TimeSpan.FromSeconds(5.0), delegate { attacker.EndAction(typeof(Stealth)); });
            }

            return valid;
        }

        public override void OnHit(Mobile attacker, Mobile defender, int damage)
        {
            //Validates before swing
            ClearCurrentMove(attacker);

            attacker.SendLocalizedMessage(1063129); // You catch your opponent off guard with your Surprise Attack!
            defender.SendLocalizedMessage(1063130); // Your defenses are lowered as your opponent surprises you!

            defender.FixedParticles(0x37B9, 1, 5, 0x26DA, 0, 3, EffectLayer.Head);

            attacker.RevealingAction();

            SurpriseAttackInfo info;

            if (m_Table.Contains(defender))
            {
                info = (SurpriseAttackInfo)m_Table[defender];

                if (info.m_Timer != null)
                    info.m_Timer.Stop();

                m_Table.Remove(defender);
            }

            int ninjitsu = attacker.Skills[SkillName.Ninjitsu].Fixed;

            int malus = ninjitsu / 60 + (int)Tracking.GetStalkingBonus(attacker, defender);

            info = new SurpriseAttackInfo(defender, malus);
            info.m_Timer = Timer.DelayCall(TimeSpan.FromSeconds(8.0), new TimerStateCallback(EndSurprise), info);

            m_Table[defender] = info;

            CheckGain(attacker);
        }

        public override void OnMiss(Mobile attacker, Mobile defender)
        {
            ClearCurrentMove(attacker);

            attacker.SendLocalizedMessage(1063161); // You failed to properly use the element of surprise.

            attacker.RevealingAction();
        }

        private static void EndSurprise(object state)
        {
            SurpriseAttackInfo info = (SurpriseAttackInfo)state;

            if (info.m_Timer != null)
                info.m_Timer.Stop();

            info.m_Target.SendLocalizedMessage(1063131); // Your defenses have returned to normal.

            m_Table.Remove(info.m_Target);
        }

        private class SurpriseAttackInfo
        {
            public readonly Mobile m_Target;
            public readonly int m_Malus;
            public Timer m_Timer;
            public SurpriseAttackInfo(Mobile target, int effect)
            {
                m_Target = target;
                m_Malus = effect;
            }
        }
    }
}