////////////////////////////////////////////////////////////////////////////////
// cai_caster - Custom Combat AI - Caster Mode
// By Deva Bryson Winblood. 11/2004
////////////////////////////////////////////////////////////////////////////////
#include "cai_inc_hos"
#include "nw_i0_generic"
#include "prc_inc_racial"

int fnClassIsSpellCaster(int nPos,object oNPC)
{ // tell me if this class is a spell caster
  int nClass=GetClassByPosition(nPos,oNPC);
  int bRet=FALSE;
  switch(nClass)
  {
    case CLASS_TYPE_ARCANE_ARCHER:
    case CLASS_TYPE_BARD:
    case CLASS_TYPE_CLERIC:
    case CLASS_TYPE_DRUID:
    case CLASS_TYPE_FEY:
    case CLASS_TYPE_DRAGONDISCIPLE:
    case CLASS_TYPE_PALADIN:
    case CLASS_TYPE_PALEMASTER:
    case CLASS_TYPE_RANGER:
    case CLASS_TYPE_SHADOWDANCER:
    case CLASS_TYPE_SHIFTER:
    case CLASS_TYPE_SORCERER:
    case CLASS_TYPE_WIZARD: { bRet=TRUE; break; }
    default: { break; }
  }
  return bRet;
} // fnClassIsSpellCaster()

int fnCanCastSpells(object oNPC)
{
  if (fnClassIsSpellCaster(1,oNPC)) return TRUE;
  else if (fnClassIsSpellCaster(2,oNPC)) return TRUE;
  else if (fnClassIsSpellCaster(3,oNPC)) return TRUE;
  return FALSE;
}

int fnCanAnyNearbyEnemiesCastSpells()
{
  object oMe=OBJECT_SELF;
  int nN;
  float fD;
  object oOb;
  oOb=GetNearestCreature(CREATURE_TYPE_REPUTATION,REPUTATION_TYPE_ENEMY,oMe,nN,CREATURE_TYPE_PERCEPTION,PERCEPTION_SEEN,CREATURE_TYPE_IS_ALIVE,TRUE);
  fD=GetDistanceBetween(oMe,oOb);
  while(GetIsObjectValid(oOb)&&fD<25.0)
  { // enemy spell casters
    if (fnCanCastSpells(oOb)) return TRUE;
    nN++;
    oOb=GetNearestCreature(CREATURE_TYPE_REPUTATION,REPUTATION_TYPE_ENEMY,oMe,nN,CREATURE_TYPE_PERCEPTION,PERCEPTION_SEEN,CREATURE_TYPE_IS_ALIVE,TRUE);
    fD=GetDistanceBetween(oMe,oOb);
  } // enemy spell casters
  return FALSE;
} // fnCanAnyNearbyEnemiesCastSpells()

object fnGetBestTarget(int nRace)
{ // tell me who my best target is at the moment
  object oRet=OBJECT_INVALID;
  int nN;
  float fD;
  int nVal;
  object oOb;
  int nThis;
  int nC;
  nN=1;
  oOb=GetNearestCreature(CREATURE_TYPE_REPUTATION,REPUTATION_TYPE_ENEMY,OBJECT_SELF,nN,CREATURE_TYPE_IS_ALIVE,TRUE,CREATURE_TYPE_PERCEPTION,PERCEPTION_SEEN);
  fD=GetDistanceBetween(oOb,OBJECT_SELF);
  while(oOb!=OBJECT_INVALID)
  { // check all nearby targets
    nThis=1;
    nN++;
    if (fD<20.0) nThis++;
    if (fD<15.0) nThis++;
    if (fD<10.0) nThis++;
    if (fD<8.0) nThis++;
    if (fD<5.0) nThis++;
    fD=IntToFloat(GetCurrentHitPoints(oOb))/IntToFloat(GetMaxHitPoints(oOb));
    if (fD<0.51) nThis++;
    if (fD<0.31) nThis++;
    if (fD<0.11) nThis++;
    if (nRace==RACIAL_TYPE_UNDEAD)
    { // see if target is a cleric
      nC=GetClassByPosition(1,oOb);
      if (nC==CLASS_TYPE_CLERIC||nC==CLASS_TYPE_PALADIN) nThis=nThis+3;
      nC=GetClassByPosition(2,oOb);
      if (nC==CLASS_TYPE_CLERIC||nC==CLASS_TYPE_PALADIN) nThis=nThis+3;
      nC=GetClassByPosition(3,oOb);
      if (nC==CLASS_TYPE_CLERIC||nC==CLASS_TYPE_PALADIN) nThis=nThis+3;
    } // see if target is a cleric
    if (fnClassIsSpellCaster(1,oOb)) nThis++;
    if (fnClassIsSpellCaster(2,oOb)) nThis++;
    if (fnClassIsSpellCaster(3,oOb)) nThis++;
    if (nThis>nVal)
    { // new best target
      oRet=oOb;
      nVal=nThis;
    } // new best target
    oOb=GetNearestCreature(CREATURE_TYPE_REPUTATION,REPUTATION_TYPE_ENEMY,OBJECT_SELF,nN,CREATURE_TYPE_IS_ALIVE,TRUE,CREATURE_TYPE_PERCEPTION,PERCEPTION_SEEN);
    fD=GetDistanceBetween(oOb,OBJECT_SELF);
  } // check all nearby targets
  return oRet;
} // tell me who my best target is at the moment

void main()
{
   object oMe=OBJECT_SELF;
   object oTarget=GetAttackTarget();
   float fF;
   int nN;
   int nMyRace=MyPRCGetRacialType(oMe);
   object oBest=fnGetBestTarget(nMyRace);
   int bTargetChanged=FALSE;
   int nState=GetLocalInt(oMe,"nCAIState");
   if (oBest!=oTarget)
   {
     oTarget=oBest;
     bTargetChanged=TRUE;
   }
   if (GetIsObjectValid(oTarget))
   { // target is valid
     if (fnCanAnyNearbyEnemiesCastSpells())
     { // defend
       SetLocalInt(oMe,"bCAISPELLCASTERS",TRUE);
     } // defend
     else { DeleteLocalInt(oMe,"bCAISPELLCASTERS"); nState=3; }
     nState++;
     if (nState>4) nState=1;
     if (nState==1)
     { // defensive spells
       nN=caiGetAvailableDefensiveSpell(oMe,oMe);
       if (nN==0) nState=2;
       else
       { // cast this spell
         AssignCommand(oMe,ActionCastSpellAtObject(nN,oMe));
       } // cast this spell
     } // defensive spells
     if (nState==2)
     { // summon spell
       if (GetIsObjectValid(GetAssociate(ASSOCIATE_TYPE_SUMMONED,oMe,1))==FALSE)
       { // no summoned critters
         nN=caiGetAvailableSummonSpell(oTarget);
         if (nN!=0)
         { // summon
           AssignCommand(oMe,ActionCastSpellAtLocation(nN,GetLocation(oMe)));
         } // summon
         else { nState=3; }
       } // no summoned critters
       else { nState=3; }
     } // summon spell
     if (nState>2)
     { // combat spell
       nN=caiGetAvailableCombatSpell(oMe,oTarget);
       if (nN!=0)
       { // spell found
         AssignCommand(oMe,ActionCastSpellAtObject(nN,oTarget));
       } // spell found
       else
       { //
         DetermineCombatRound(oTarget);
       } //
     } // combat spell
   } // target is valid
   // check need to heal self and remove negative spells
   // set up sentinel for resting
   if (GetLocalInt(oMe,"bCAIRESTSENTINEL")!=TRUE)
   { // trigger the sentinel
     SetLocalInt(oMe,"bCAIRESTSENTINEL",TRUE);
     caiRestSentinel(oMe);
   } // trigger the sentinel
}