using System;

namespace Server.Spells.Mysticism
{
    public abstract class MysticSpell : Spell
    {
        public MysticSpell(Mobile caster, Item scroll, SpellInfo info)
            : base(caster, scroll, info)
        {
        }

        public abstract SpellCircle Circle { get; }

        private static readonly int[] m_ManaTable = new int[] { 4, 6, 9, 11, 14, 20, 40, 50 };

        public override TimeSpan CastDelayBase => TimeSpan.FromMilliseconds(((4 + (int)Circle) * CastDelaySecondsPerTick) * 1000);
        public override double CastDelayFastScalar => 1.0;

        public double ChanceOffset => Caster is Mobiles.PlayerMobile ? 20.0 : 30.0;
        private const double ChanceLength = 100.0 / 7.0;

        public override void GetCastSkills(out double min, out double max)
        {
            int circle = (int)Circle;

            if (Scroll != null)
                circle -= 2;

            double avg = ChanceLength * circle;

            min = avg - ChanceOffset;
            max = avg + ChanceOffset;
        }

        public override SkillName CastSkill => SkillName.Mysticism;

        public override SkillName DamageSkill
        {
            get
            {
                if (Caster.Skills[SkillName.Imbuing].Value >= Caster.Skills[SkillName.Focus].Value)
                    return SkillName.Imbuing;
                return SkillName.Focus;
            }
        }

        public override void SendCastEffect()
        {
            if (Caster.Player)
                Caster.FixedEffect(0x37C4, 87, (int)(GetCastDelay().TotalSeconds * 28), 0x66C, 3);
        }

        public override int GetMana()
        {
            if (this is HailStormSpell)
                return 50;

            return m_ManaTable[(int)Circle];
        }

        public override TimeSpan GetCastRecovery()
        {
            if (Scroll is SpellStone)
                return TimeSpan.Zero;

            return base.GetCastRecovery();
        }

        public override TimeSpan GetCastDelay()
        {
            if (Scroll is SpellStone)
                return TimeSpan.Zero;

            return base.GetCastDelay();
        }

        public override bool CheckCast()
        {
            if (!base.CheckCast())
                return false;

            return true;
        }

        public virtual bool CheckResisted(Mobile target)
        {
            double n = GetResistPercent(target);

            n /= 100.0;

            if (n <= 0.0)
                return false;

            if (n >= 1.0)
                return true;

            int circle = Math.Max(5, 1 + (int)Circle);

            int maxSkill = circle * 10;
            maxSkill += (circle / 6) * 25;

            if (target.Skills[SkillName.MagicResist].Value < maxSkill)
                target.CheckSkill(SkillName.MagicResist, 0.0, target.Skills[SkillName.MagicResist].Cap);

            return (n >= Utility.RandomDouble());
        }

        public virtual double GetResistPercentForCircle(Mobile target, SpellCircle circle)
        {
            double value = GetResistSkill(target);
            double firstPercent = value / 5.0;
            double secondPercent = value - (((Caster.Skills[CastSkill].Value - 20.0) / 5.0) + (Math.Max(5, 1 + (int)circle)) * 5.0);

            return (firstPercent > secondPercent ? firstPercent : secondPercent) / 2.0; // Seems should be about half of what stratics says.
        }

        public virtual double GetResistPercent(Mobile target)
        {
            return GetResistPercentForCircle(target, Circle);
        }

        public static double GetBaseSkill(Mobile m)
        {
            return m.Skills[SkillName.Mysticism].Value;
        }

        public static double GetBoostSkill(Mobile m)
        {
            return Math.Max(m.Skills[SkillName.Imbuing].Value, m.Skills[SkillName.Focus].Value);
        }
    }
}