using System;
using Server.Factions;
using Server.Mobiles;
using Server.Multis;
using Server.Targeting;

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

    public static TimeSpan OnUse(Mobile src)
    {
      src.SendLocalizedMessage(500819); // Where will you search?
      src.Target = new InternalTarget();

      return TimeSpan.FromSeconds(6.0);
    }

    private class InternalTarget : Target
    {
      public InternalTarget() : base(12, true, TargetFlags.None)
      {
      }

      protected override void OnTarget(Mobile src, object targ)
      {
        bool foundAnyone = false;

        Point3D p;
        if (targ is Mobile mobile)
          p = mobile.Location;
        else if (targ is Item item)
          p = item.Location;
        else if (targ is IPoint3D d)
          p = new Point3D(d);
        else
          p = src.Location;

        double srcSkill = src.Skills.DetectHidden.Value;
        int range = (int)(srcSkill / 10.0);

        if (!src.CheckSkill(SkillName.DetectHidden, 0.0, 100.0))
          range /= 2;

        BaseHouse house = BaseHouse.FindHouseAt(p, src.Map, 16);

        bool inHouse = house?.IsFriend(src) == true;

        if (inHouse)
          range = 22;

        if (range > 0)
        {
          IPooledEnumerable<Mobile> inRange = src.Map.GetMobilesInRange(p, range);

          foreach (Mobile trg in inRange)
            if (trg.Hidden && src != trg)
            {
              double ss = srcSkill + Utility.Random(21) - 10;
              double ts = trg.Skills.Hiding.Value + Utility.Random(21) - 10;

              if (src.AccessLevel >= trg.AccessLevel && (ss >= ts || (inHouse && house.IsInside(trg))))
              {
                if (trg is ShadowKnight && (trg.X != p.X || trg.Y != p.Y))
                  continue;

                trg.RevealingAction();
                trg.SendLocalizedMessage(500814); // You have been revealed!
                foundAnyone = true;
              }
            }

          inRange.Free();

          if (Faction.Find(src) != null)
          {
            IPooledEnumerable<BaseFactionTrap> itemsInRange = src.Map.GetItemsInRange<BaseFactionTrap>(p, range);

            foreach (BaseFactionTrap trap in itemsInRange)
              if (src.CheckTargetSkill(SkillName.DetectHidden, trap, 80.0, 100.0))
              {
                src.SendLocalizedMessage(1042712, true,
                  $" {(trap.Faction == null ? "" : trap.Faction.Definition.FriendlyName)}"); // You reveal a trap placed by a faction:

                trap.Visible = true;
                trap.BeginConceal();

                foundAnyone = true;
              }

            itemsInRange.Free();
          }
        }

        if (!foundAnyone) src.SendLocalizedMessage(500817); // You can see nothing hidden there.
      }
    }
  }
}