# ****************************************************************************
# CUI
#
# The Advanced Framework for Simulation, Integration, and Modeling (AFSIM)
#
# The use, dissemination or disclosure of data in this file is subject to
# limitation or restriction. See accompanying README and LICENSE for details.
# ****************************************************************************



#this is a parent behavior of any defensive manuevers
#  first determine if we are in danger, then defend in the child behaviors

include_once behavior_unload.txt
include_once behavior_force_overshoot.txt



behavior in_danger

   script_variables
      double    cANGLE_TOLERANCE =  45.0; # degrees
      WsfTrack  mBiggestThreat;
   end_script_variables


   script bool NotWeapon(WsfTrack aTrack)
      if (aTrack.Target().IsValid() && aTrack.Target().WeaponEngagement().IsValid())
      {
         return false;  //it is a weapon
      }
      return true;
   end_script


   script bool IsFlyer(WsfPlatform aPlat)
      if (!aPlat.IsValid())
      {
         return false;
      }
      if (aPlat.Mover().IsA_TypeOf("WSF_AIR_MOVER" ) ||
          aPlat.Mover().IsA_TypeOf("WSF_6DOF_MOVER")    )
      {
         return true;
      }
      else if (aPlat.MakeTrack().AirDomain())
      {
         return true;
      }
      else if((aPlat.Altitude() > 152.4) && (aPlat.Speed() > 51.44) ) // ~500 feet alt, ~100 knots speed
      {
         return true;
      }
      return false;
   end_script


   precondition
      writeln("precondition in_danger");

      //check track list for any threats
     #extern double mVisualRange;
     #extern string CalculatePositioning( WsfPlatform, WsfTrack, double );

      //see if anybody is threatening me
      mBiggestThreat = null;

      foreach (WsfLocalTrack t in PLATFORM.MasterTrackList())
      {
         if (!t.SideValid() || t.Side() != PLATFORM.Side())
         {
            double range = PLATFORM.SlantRangeTo(t);
            if ((range < mVisualRange) && NotWeapon(t) && IsFlyer(t.Target()))
            {
               string pos = CalculatePositioning(PLATFORM, t, cANGLE_TOLERANCE );
               if (pos=="tail-to-head" || pos=="target-facing-me")
               {
                  if (!mBiggestThreat.IsValid() || (range < PLATFORM.SlantRangeTo(mBiggestThreat)))
                  {
                     #mBiggestThreat = (WsfTrack)t;
                     mBiggestThreat = t;
                  }
               }
            }
         }
      }

      if (mBiggestThreat.IsValid())
      {
         //if we are closer to our target, stay in the fight
         WsfTrack targetTrack = PROCESSOR.GetTarget();
         if (!targetTrack.IsNull() && targetTrack.IsValid())
         {
           #extern double mEngagementAggressiveness;
            double threatRange = PLATFORM.SlantRangeTo(mBiggestThreat);
            double requiredAggressiveness = threatRange / (threatRange + PLATFORM.SlantRangeTo(targetTrack));
            if (mEngagementAggressiveness >= requiredAggressiveness)
            {
               string myPos = CalculatePositioning(PLATFORM, targetTrack, cANGLE_TOLERANCE );
               if (myPos=="head-to-tail" || myPos="me-facing-target")
               {
                  writeln("   not in enough danger, I am chasing target: ", targetTrack.TargetName());
                  return false;  #do not defend, I am aggressive enough to stay after my target, and I am facing my target
               }
            }
         }
         return true;
      }
      return false;
   end_precondition


   execute
      writeln("executing in_danger");
      PLATFORM.Comment("in_danger");
   end_execute


   selector
      behavior    unload            end_behavior
      behavior    force_overshoot   end_behavior
   end_selector


end_behavior