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//-------------------------------------------------
//
//   Class: DTTracoLUTs
//
//   Description: Look-up tables for phi radial angle and
//   psi angle from angle and position in traco
//
//   Author :
//   Sara Vanini - 10/III/03 - INFN Padova
//   17/III/07 SV : delete SimpleConfigurable dependence
//--------------------------------------------------
// #include "Utilities/Configuration/interface/Architecture.h"

//-----------------------
// This Class's Header --
//-----------------------

#include "L1Trigger/DTTraco/interface/DTTracoLUTs.h"

//---------------
// C++ Headers --
//---------------
#include <iostream>
#include <iomanip>
#include <string>
#include <cmath>
#include <algorithm>

//-------------------------------
// Collaborating Class Headers --
//-------------------------------

#include "L1Trigger/DTUtilities/interface/DTTPGLutFile.h"

using namespace std;

// --------------------------------
//       class DTTracoLUTs
//---------------------------------

//----------------
// Constructors --
//----------------

DTTracoLUTs::DTTracoLUTs(string testfile):
                        _testfile(testfile) {
}


//--------------
// Destructor --
//--------------

DTTracoLUTs::~DTTracoLUTs() {

  psi_lut.clear();
  for(int k=0;k<3;k++)
    phi_lut[k].clear();
}


//--------------
// Operations --
//--------------

//
// reset look-up tables
//
void DTTracoLUTs::reset() {

  psi_lut.clear();
  for(int k=0;k<3;k++)
    phi_lut[k].clear();
}


//
// load look-up tables for traco
//
int DTTracoLUTs::load() {

  // get file name in current directory
  string ang_file = _testfile + ".anglut";
  string pos_file = _testfile + ".poslut";
 
  // open file for PSI 
  DTTPGLutFile filePSI(ang_file);
  if ( filePSI.open() != 0 ) return -1;

  // ignore comment lines 
  //filePSI.ignoreLines(14);

  // read file for PSI values --->   psi is 10 bits, 9+sign(10,11...16), resolution 9 bits, 
  for(int u=0;u<1024;u++){
      int word  = filePSI.readHex();  //read a 16 bits word
      //int psi = word & 0x01FF;    //bits  0,1,...8
      //int sgn = word & 0x0200;    //bit 9
      //if(sgn)
        //psi = -psi;
      psi_lut.push_back(word);      //positive value
  }
  filePSI.close();
 
  // open file for PHI 
  DTTPGLutFile filePHI(pos_file);
  if ( filePHI.open() != 0 ) return -1;

  // read file for PHI values    --->  phi is 12 bits, 11+sign(12..16), resolution 12 bits
  for(int y=0;y<3;y++){     //3 series of values: I-outer, II-innner, III-correlated
    for(int h=0;h<512;h++){
        int phi  = filePHI.readHex();
        //phi &= 0x0FFF;                //get 12 bits
        //int sgn = phi;
        //sgn >> 11;                    //bit 12 for sign
        //sgn &= 0x01;
        //if(sgn==1)                    //negative value
          //phi = -phi;
        phi_lut[y].push_back(phi);  //positive value
    }
  } 
  filePHI.close();
  return 0;
}


//
// print look-up tables for EMU
//
void DTTracoLUTs::print() const {

  cout << endl;
  cout << "L1 barrel Traco look-up tables :" << endl;
  cout << "====================================================" << endl;
  cout << endl;

//  int i = 0;
  //  for debugging
  for(int x=0;x<1024;x++)
    cout << "K=" << x << " ---> " << hex << psi_lut[x] << dec << endl;
  for(int m=0;m<512;m++)
    cout << "X=" << m << " ---> " << hex << (phi_lut[0])[m] << "  " 
                                  << (phi_lut[1])[m] << "  " 
                                  << (phi_lut[2])[m] << "  " << dec << endl; 

}

//
// get phi radial value for a given position 
//
unsigned short int DTTracoLUTs::getPhiRad(int pos,int flag) const {
  unsigned short int phi = (phi_lut[flag])[pos]  &  0xFFF;     //12 bits
  //int sgn = (phi_lut[flag])[pos]  &  0x800;     //bit 12 for sign
  //if(sgn)
    //phi = - phi;

  return phi;
}

//
// get psi value for a given angle 
//
unsigned short int DTTracoLUTs::getPsi(int ang) const {

  unsigned short int ipsi = (psi_lut)[ang+512]; //scritto in complemento a due 
/*
  //debug: try with formula
  float fpsi = atan( ((float)(ang) * 4.2) /(18 * 1.3 * 30 ));
  fpsi*=512;
  if(fpsi<=0)fpsi-=1.0;
  int ipsi = (int)fpsi;
  // if outside range set to lower edge
  if( ipsi>= 512 ||
      ipsi< -512 ) ipsi=-512;
cout << "psi is="<<ipsi <<endl;
*/
   return ipsi;
}

//
// get bending angle 
//
unsigned short int DTTracoLUTs::getBendAng(int pos, int ang, int flag) const {
  // bendAng = psi - phi  : psi ha risoluzione 12, phi 9, quindi devo riportarli alla
  // stessa risoluzione con : phi/8 (scarto i 3 bit meno significativi). 
  // Il risultato ha risoluzione 10 bits. 
  unsigned short int BendAng = ( (psi_lut)[ang+512] - ((phi_lut[flag])[pos]/8) ) & 0x3FF;    //10 bits
   
  //cout << "Bending angle is:" << hex << BendAng << endl; 
  //cout << "Abs of bending angle is:" << hex << abs(BendAng) << endl; 


  return BendAng;
}