using Server.Items;
using System;

namespace Server.SkillHandlers
{
    class Meditation
    {
        public static void Initialize()
        {
            SkillInfo.Table[46].Callback = OnUse;
        }

        public static bool CheckOkayHolding(Item item)
        {
            if (item == null)
                return true;

            if (item is Spellbook || item is Runebook)
                return true;

            if (item is BaseWeapon && ((BaseWeapon)item).Attributes.SpellChanneling != 0)
                return true;

            if (item is BaseArmor && ((BaseArmor)item).Attributes.SpellChanneling != 0)
                return true;

            return false;
        }

        public static TimeSpan OnUse(Mobile m)
        {
            m.RevealingAction();

            if (m.Target != null)
            {
                m.SendLocalizedMessage(501845); // You are busy doing something else and cannot focus.

                return TimeSpan.FromSeconds(5.0);
            }

            if (m.Mana >= m.ManaMax)
            {
                m.SendLocalizedMessage(501846); // You are at peace.

                return TimeSpan.FromSeconds(10.0);
            }

            if (Misc.RegenRates.GetArmorOffset(m) > 0)
            {
                m.SendLocalizedMessage(500135); // Regenative forces cannot penetrate your armor!

                return TimeSpan.FromSeconds(10.0);
            }

            Item oneHanded = m.FindItemOnLayer(Layer.OneHanded);
            Item twoHanded = m.FindItemOnLayer(Layer.TwoHanded);

            if (m.Player)
            {
                if (!CheckOkayHolding(oneHanded))
                    m.AddToBackpack(oneHanded);

                if (!CheckOkayHolding(twoHanded))
                    m.AddToBackpack(twoHanded);
            }
            else if (!CheckOkayHolding(oneHanded) || !CheckOkayHolding(twoHanded))
            {
                m.SendLocalizedMessage(502626); // Your hands must be free to cast spells or meditate.

                return TimeSpan.FromSeconds(2.5);
            }

            double skillVal = m.Skills[SkillName.Meditation].Value;
            double chance = (50.0 + ((skillVal - (m.ManaMax - m.Mana)) * 2)) / 100;

            // must bypass normal checks so passive skill checks aren't triggered
            CrystalBallOfKnowledge.TellSkillDifficultyActive(m, SkillName.Meditation, chance);

            if (chance > Utility.RandomDouble())
            {
                m.CheckSkill(SkillName.Meditation, 0.0, 100.0);

                m.SendLocalizedMessage(501851); // You enter a meditative trance.
                m.Meditating = true;
                BuffInfo.AddBuff(m, new BuffInfo(BuffIcon.ActiveMeditation, 1075657));

                if (m.Player || m.Body.IsHuman)
                    m.PlaySound(0xF9);

                m.ResetStatTimers();
            }
            else
            {
                m.SendLocalizedMessage(501850); // You cannot focus your concentration.
            }

            return TimeSpan.FromSeconds(10.0);
        }
    }
}