/*=========================================================================
                                                                                
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. 
The U.S. Government has rights to use, reproduce, and distribute this software. 
NEITHER THE GOVERNMENT NOR LOS ALAMOS NATIONAL SECURITY, LLC MAKES ANY WARRANTY,
EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE.  
If software is modified to produce derivative works, such modified software 
should be clearly marked, so as not to confuse it with the version available 
from LANL.
 
Additionally, redistribution and use in source and binary forms, with or 
without modification, are permitted provided that the following conditions 
are met:
-   Redistributions of source code must retain the above copyright notice, 
    this list of conditions and the following disclaimer. 
-   Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution. 
-   Neither the name of Los Alamos National Security, LLC, Los Alamos National
    Laboratory, LANL, the U.S. Government, nor the names of its contributors
    may be used to endorse or promote products derived from this software 
    without specific prior written permission. 

THIS SOFTWARE IS PROVIDED BY LOS ALAMOS NATIONAL SECURITY, LLC AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
ARE DISCLAIMED. IN NO EVENT SHALL LOS ALAMOS NATIONAL SECURITY, LLC OR 
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                                                                                
=========================================================================*/

#ifndef BasicDefinition_h
#define BasicDefinition_h

#ifdef USE_VTK_COSMO
#include "vtkType.h"
#else
#include <stdint.h>
#endif

///////////////////////////////////////////////////////////////////////////
//

#ifdef USE_VTK_COSMO
#ifdef ID_64
   typedef      vtkTypeInt64 ID_T;           // Particle and halo ids
#else
   typedef      vtkTypeInt32 ID_T;           // Particle and halo ids
#endif
#else
#ifdef ID_64
   typedef      int64_t ID_T;           // Particle and halo ids
#else
   typedef      int32_t ID_T;           // Particle and halo ids
#endif
#endif

#ifdef POSVEL_64
   typedef      double  POSVEL_T;       // Position,velocity
   typedef      double  POTENTIAL_T;    // Potential
#else
   typedef      float   POSVEL_T;       // Position,velocity
   typedef      float   POTENTIAL_T;    // Potential
#endif

#ifdef GRID_64
   typedef      double  GRID_T;         // Grid types
#else
   typedef      float   GRID_T;         // Grid types
#endif

#ifdef USE_VTK_COSMO
typedef vtkTypeInt32    STATUS_T; // Dead (which neighbor) or alive particles
typedef vtkTypeUInt16   MASK_T;   // Other particle information
#else
typedef int32_t         STATUS_T; // Dead (which neighbor) or alive particles
typedef uint16_t        MASK_T;   // Other particle information
#endif

///////////////////////////////////////////////////////////////////////////

const float MAX_FLOAT   = 1.0e15;
const float MIN_FLOAT   = -1.0e15;

const int   RECORD      = 0;    // Input data is by particle record
const int   BLOCK       = 1;    // Input data is blocked by variable

const int   DIMENSION   = 3;
const int   BUF_SZ      = 512;  // Character buffer

// Constants for Spherical Over Dense calculation
const double    CHAIN_SIZE = 2.0;               // Size for bucket mesh
const double    RHO_C   = 2.77536627e11;        // Critical density
const double    RHO_RATIO = 200.0;              // density/critical density
const double    MASS_FACTOR = 1.0e14;		// divide halo mass by this
const double    MIN_RADIUS_FACTOR = 0.5;        // Factor of initial SOD radius
const double    MAX_RADIUS_FACTOR = 2.0;        // Factor of initial SOD radius
const int       MIN_SOD_SIZE = 1000;            // Min FOF halo for SOD
const float     MIN_SOD_MASS = 5.0e12;          // Min FOF mass for SOD
const int       NUM_SOD_BINS = 20;              // Log bins for SOD halo

// Cosmology record data in .cosmo format
const int   COSMO_FLOAT = 7;    // x,y,z location and velocity plus mass
const int   COSMO_INT   = 1;    // Particle id
const int   RECORD_SIZE = sizeof(POSVEL_T) * COSMO_FLOAT + 
                          sizeof(ID_T) * COSMO_INT;

const bool  ENFORCE_MAX_READ = false;
const int   MAX_READ    = 8000000;
                                // Maximum number of particles to read at a time
                                // Multipled by COSMO_FLOAT floats
                                // makes the largest MPI allowed buffer

const float DEAD_FACTOR = 1.20f; // Number of dead allocated is % more than max

const int   ALIVE       = -1;   // Particle belongs to this processor
const int   MIXED       = ALIVE - 1;
                                // For a trick to quickly know what
                                // particles should be output

const int   UNMARKED    = -1;   // Mixed halo needs MASTER to arbitrate
const int   INVALID     = 0;    // Mixed halo is not recorded on processor
const int   VALID       = 1;    // Mixed halo is recorded on processor

const int   MASTER      = 0;    // Processor to do merge step

const int   MERGE_COUNT = 20;   // Number of tags to merge on in mixed

// Parameters for center finding
const int   MBP_THRESHOLD = 5000; // Threshold between n^2 and AStar methods
const int   MCP_THRESHOLD = 8000;// Threshold between n^2 and Chain methods
const int   MCP_CHAIN_FACTOR = 5; // Subdivide bb for building chaining mesh

//
// Neighbors are enumerated so that particles can be attached to the correct
// neighbor, but these pairs must be preserved for the ParticleExchange.
// Every processor should be able to send and receive on every iteration of
// the exchange, so if everyone sends RIGHT and receives LEFT it works
//
// Do not change this pairing order.
//
enum NEIGHBOR
{
  X0,                   // Left face
  X1,                   // Right face

  Y0,                   // Bottom face
  Y1,                   // Top face

  Z0,                   // Front face
  Z1,                   // Back face

  X0_Y0,                // Left   bottom edge
  X1_Y1,                // Right  top    edge

  X0_Y1,                // Left   top    edge
  X1_Y0,                // Right  bottom edge

  Y0_Z0,                // Bottom front  edge
  Y1_Z1,                // Top    back   edge

  Y0_Z1,                // Bottom back   edge
  Y1_Z0,                // Top    front  edge

  Z0_X0,                // Front  left   edge
  Z1_X1,                // Back   right  edge

  Z0_X1,                // Front  right  edge
  Z1_X0,                // Back   left   edge

  X0_Y0_Z0,             // Left  bottom front corner
  X1_Y1_Z1,             // Right top    back  corner

  X0_Y0_Z1,             // Left  bottom back  corner
  X1_Y1_Z0,             // Right top    front corner

  X0_Y1_Z0,             // Left  top    front corner
  X1_Y0_Z1,             // Right bottom back  corner

  X0_Y1_Z1,             // Left  top    back  corner
  X1_Y0_Z0              // Right bottom front corner
};

const int NUM_OF_NEIGHBORS      = 26;

// Header for Gadget-2 input files
struct CosmoHeader {
  int      npart[6];
  double   mass[6];
  double   time;
  double   redshift;
  int      flag_sfr;
  int      flag_feedback;
  int      npartTotal[6];
  int      flag_cooling;
  int      num_files;
  double   BoxSize;
  double   Omega0;
  double   OmegaLambda;
  double   HubbleParam;
  int      flag_stellarage;
  int      flag_metals;
  int      npartTotalHighWord[6];
  int      flag_entropy_instead_u;
  char     fill[60];  /* fills to 256 Bytes */
};

#endif
