using System;
using Server.Mobiles;
using Server.Spells.Chivalry;
using Server.Targeting;

namespace Server.Spells.Fifth
{
  public class ParalyzeSpell : MagerySpell, ISpellTargetingMobile
  {
    private static SpellInfo m_Info = new SpellInfo(
      "Paralyze", "An Ex Por",
      218,
      9012,
      Reagent.Garlic,
      Reagent.MandrakeRoot,
      Reagent.SpidersSilk
    );

    public ParalyzeSpell(Mobile caster, Item scroll = null) : base(caster, scroll, m_Info)
    {
    }

    public override SpellCircle Circle => SpellCircle.Fifth;

    public override void OnCast()
    {
      Caster.Target = new SpellTargetMobile(this, TargetFlags.Harmful, Core.ML ? 10 : 12);
    }

    public void Target(Mobile m)
    {
      if (m == null)
        return;

      if (!Caster.CanSee(m))
        Caster.SendLocalizedMessage(500237); // Target can not be seen.
      else if (Core.AOS && (m.Frozen || m.Paralyzed ||
                            m.Spell != null && m.Spell.IsCasting && !(m.Spell is PaladinSpell)))
      {
        Caster.SendLocalizedMessage(1061923); // The target is already frozen.
      }
      else if (CheckHSequence(m))
      {
        SpellHelper.Turn(Caster, m);

        SpellHelper.CheckReflect((int)Circle, Caster, ref m);

        double duration;

        if (Core.AOS)
        {
          int secs = (int)(GetDamageSkill(Caster) / 10 - GetResistSkill(m) / 10);

          if (!Core.SE)
            secs += 2;

          if (!m.Player)
            secs *= 3;

          if (secs < 0)
            secs = 0;

          duration = secs;
        }
        else
        {
          // Algorithm: ((20% of magery) + 7) seconds [- 50% if resisted]

          duration = 7.0 + Caster.Skills.Magery.Value * 0.2;

          if (CheckResisted(m))
            duration *= 0.75;
        }

        if (m is PlagueBeastLord lord)
        {
          lord.OnParalyzed(Caster);
          duration = 120;
        }

        m.Paralyze(TimeSpan.FromSeconds(duration));

        m.PlaySound(0x204);
        m.FixedEffect(0x376A, 6, 1);

        HarmfulSpell(m);
      }

      FinishSequence();
    }
  }
}