using System;
using System.Collections.Generic;

namespace Server.Spells.Spellweaving
{
  public class ThunderstormSpell : ArcanistSpell
  {
    private static SpellInfo m_Info = new SpellInfo(
      "Thunderstorm", "Erelonia",
      -1
    );

    private static Dictionary<Mobile, Timer> m_Table = new Dictionary<Mobile, Timer>();

    public ThunderstormSpell(Mobile caster, Item scroll)
      : base(caster, scroll, m_Info)
    {
    }

    public override TimeSpan CastDelayBase => TimeSpan.FromSeconds(1.5);

    public override double RequiredSkill => 10.0;
    public override int RequiredMana => 32;

    public override void OnCast()
    {
      if (CheckSequence())
      {
        Caster.PlaySound(0x5CE);

        double skill = Caster.Skills[SkillName.Spellweaving].Value;

        int damage = Math.Max(11, 10 + (int)(skill / 24)) + FocusLevel;

        int sdiBonus = AosAttributes.GetValue(Caster, AosAttribute.SpellDamage);

        int pvmDamage = damage * (100 + sdiBonus);
        pvmDamage /= 100;

        if (sdiBonus > 15)
          sdiBonus = 15;

        int pvpDamage = damage * (100 + sdiBonus);
        pvpDamage /= 100;

        int range = 2 + FocusLevel;
        TimeSpan duration = TimeSpan.FromSeconds(5 + FocusLevel);

        List<Mobile> targets = new List<Mobile>();

        foreach (Mobile m in Caster.GetMobilesInRange(range))
          if (Caster != m && SpellHelper.ValidIndirectTarget(Caster, m) && Caster.CanBeHarmful(m, false) &&
              Caster.InLOS(m))
            targets.Add(m);

        for (int i = 0; i < targets.Count; i++)
        {
          Mobile m = targets[i];

          Caster.DoHarmful(m);

          Spell oldSpell = m.Spell as Spell;

          SpellHelper.Damage(this, m, m.Player && Caster.Player ? pvpDamage : pvmDamage, 0, 0, 0, 0, 100);

          if (oldSpell != null && oldSpell != m.Spell)
            if (!CheckResisted(m))
            {
              m_Table[m] = Timer.DelayCall(duration, DoExpire, m);

              BuffInfo.AddBuff(m,
                new BuffInfo(BuffIcon.Thunderstorm, 1075800, duration, m, GetCastRecoveryMalus(m)));
            }
        }
      }

      FinishSequence();
    }

    public static int GetCastRecoveryMalus(Mobile m)
    {
      return m_Table.ContainsKey(m) ? 6 : 0;
    }

    public static void DoExpire(Mobile m)
    {
      if (m_Table.TryGetValue(m, out Timer t))
      {
        t.Stop();
        m_Table.Remove(m);

        BuffInfo.RemoveBuff(m, BuffIcon.Thunderstorm);
      }
    }
  }
}