/*=========================================================================
                                                                                
Copyright (c) 2007, Los Alamos National Security, LLC

All rights reserved.

Copyright 2007. Los Alamos National Security, LLC. 
This software was produced under U.S. Government contract DE-AC52-06NA25396 
for Los Alamos National Laboratory (LANL), which is operated by 
Los Alamos National Security, LLC for the U.S. Department of Energy. 
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=========================================================================*/

#ifndef CosmoHalo_h
#define CosmoHalo_h

#include "CosmoDefinition.h"
#include <string>
#include <vector>
#include <set>
#include <algorithm>

using namespace std;

////////////////////////////////////////////////////////////////////////////
//
// CosmoHalo functions as a container for mixed halos received from the serial
// halo finder where the particle vector contains the index of the particle
// on a particular processor and the tag of that particle for the problem.
//
// It also functions as a merge container for MASTER processor where it
// contains the mixed halos crossing more than one boundary.
//
////////////////////////////////////////////////////////////////////////////

class CosmoHalo {
public:
  CosmoHalo(ID_T id, int alive, int dead)
                {
                  this->numberOfAlive = alive;
                  this->numberOfDead = dead;
                  this->haloID = id;
                  this->valid = VALID;
                  this->particles = new vector<ID_T>;
                  this->tags = new vector<ID_T>;
                  this->neighbors = new set<int>;
                  this->partners = new set<int>;
                }
  ~CosmoHalo()
                {
                  delete this->particles;
                  delete this->tags;
                  delete this->neighbors;
                  delete this->partners;
                }

  // Add a particle index for this halo on this processor
  // Add to the neighbor zones to know how many processors share this halo
  void addParticle(ID_T indx, ID_T tag, int neighbor)
                {
                  this->particles->push_back(indx);
                  this->tags->push_back(tag);
                  if (neighbor != ALIVE)
                    this->neighbors->insert(neighbor);
                }

  // Add a mixed particle
  void addParticle(ID_T tag)
                {
                  this->tags->push_back(tag);
                }

  // Add a matching mixed halo index indicating same halo
  void addPartner(int index)
                {
                  this->partners->insert(index);
                }

  // Sort the members to help identify the same halo on multiple processors
  void sortParticleTags()
                {
                  sort(this->tags->begin(), this->tags->end());
                }

  void         setAliveCount(int c)     { this->numberOfAlive = c; }
  void         setDeadCount(int c)      { this->numberOfDead = c; }
  void         setRankID(int rank)      { this->rankID = rank; }
  void         setValid(int v)          { this->valid = v; }

  ID_T         getHaloID()              { return this->haloID; }
  int          getRankID()              { return this->rankID; }
  int          getAliveCount()          { return this->numberOfAlive; }
  int          getDeadCount()           { return this->numberOfDead; }
  int          getValid()               { return this->valid; }

  vector<ID_T>* getParticles()          { return this->particles; }
  vector<ID_T>* getTags()               { return this->tags; }
  set<int>*    getNeighbors()           { return this->neighbors; }
  set<int>*    getPartners()            { return this->partners; }


private:
  ID_T haloID;                  // Halo id is smallest particle index/tag
  int rankID;                   // Processor which owns this halo

  vector<ID_T>* particles;      // Index of halo particle on this processor
  vector<ID_T>* tags;           // Tag of halo particle
  set<int>* neighbors;          // Zones with dead particles from this halo
  set<int>* partners;           // Index of matching mixed halo

  int numberOfAlive;            // Number of alive particles in halo
  int numberOfDead;             // Number of dead particles in halo

  int valid;                    // Mixed halo to be used or not
};

#endif
