#! /usr/bin/perl -w
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# MUPAGE configuration script
#
# created: 23 April 2021
#
# For help, type ./configure -h
#
# Carla Distefano <distefano_c \at lns.infn.it>
# Laboratori Nazionali del Sud - INFN
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# print out info & exit if any of the command-line arguments was --help
#
if(($match = grep(/-h/i, @ARGV)) > 0 ) {
  print "\n";
  print "*** MUAPGE configure script *** \n\n";

  print "Usage: ./configure [option]... [flag=value]... \n\n";
  print "    FLAG               DESCRIPTION                                                     DEFAULT\n";
  print "\n enable/disable options with either --enable- or --disable- (e.g. --enable-music)\n\n";
  print "    antares            Enable ANTARES output file writing                              default: disabled \n";
  print "    km3net             Enable KM3NeT output file writing                               default: disabled \n";
  print "    antcc              Enable antcc library                                            default: disabled \n";

  print "\n options for prefix with --with- (eg --with-antares-lib=/some/path/)\n\n";
  print "    antares-inc        Path to ANTARES I/O includes                                    needed if you --enable-antares    \n";
  print "    antares-lib        Path to ANTARES I/O libraries                                   needed if you --enable-antares    \n";
  print "    km3net-inc         Path to KM3NET-DATAFORMAT includes                              needed if you --enable-km3net     \n";
  print "    km3net-lib         Path to KM3NET-DATAFORMAT libraries                             needed if you --enable-km3net     \n";
  print "    antcc-inc          Path to antcc includes                                          needed if you --enable-antcc      \n";
  print "    antcc-lib          Path to antcc libraries                                         needed if you --enable-antcc      \n";
  print "    clhep-inc          Path to clhep includes                                          needed if you --enable-antcc      \n";
  print "\n./configure --help | more \n\n";
  exit 0;
}


# Check that $ROOTSYS is set
#
$ROOTSYS = $ENV{'ROOTSYS'};
die ("*** Error *** The ROOTSYS environmental variable is not defined. Is ROOT installed?")
unless defined $ROOTSYS;



# Open Make.config to write configuration options
#
$MKCONF_FILE = "Make.config";
open(MKCONF, ">$MKCONF_FILE") or die("Can not write out the Make.config file!");

print MKCONF "# \n";
print MKCONF "# Make.config \n";
print MKCONF "# This file was automatically generated by the 'configure' script  \n";
print MKCONF "# and is included into the project Makefiles  \n";
print MKCONF "# \n";


# Create a string by joining all the command line arguments
#
my $options = join(" ", @ARGV);


# Default --enable/--disable config options (for a minimal gSeaGen build)
#
my $gopt_enable_antares         = "NO";
my $gopt_enable_km3net          = "NO";
my $gopt_enable_antcc           = "NO";


# Check configure's command line arguments for non-default values
#
if(($match = grep(/--enable-antares/i,          @ARGV)) > 0) { $gopt_enable_antares             = "YES"; }
if(($match = grep(/--enable-km3net/i,           @ARGV)) > 0) { $gopt_enable_km3net              = "YES"; }
if(($match = grep(/--enable-antcc/i,            @ARGV)) > 0) { $gopt_enable_antcc               = "YES"; }


# ------------------------------------------------
# ANTARES-IO paths
# ------------------------------------------------

# If --enable-antares was set then the full path to the ANTARES library must be specified
#
my $gopt_with_antares_lib = "";
if($gopt_enable_antares eq "YES") {
  if(($match = grep(/--with-antares-lib/i, @ARGV)) > 0) {
    $options=~m/--with-antares-lib=(\S*)/i;
    $gopt_with_antares_lib = $1;
      
    # check
    my $file      = "$gopt_with_antares_lib/io_gcc.o";
    if(! -e $file) {
      print "*** Error *** You did not specify a valid path to ANTARES I/O library using --with-antares-lib=/some/path/\n";
      exit 1;
    }
  }
  else {
    print "*** Error *** You need to specify the path to ANTARES I/O library using --with-antares-lib=/some/path/\n";
    print "*** Error *** Otherwise, you should --disable-antares\n\n";
    exit 1;
  }  
}


# If --enable-antares was set then the full path to the ANTARES includes must be specified
#
my $gopt_with_antares_inc = "";
if($gopt_enable_antares eq "YES") {
  if(($match = grep(/--with-antares-inc/i, @ARGV)) > 0) {
    $options=~m/--with-antares-inc=(\S*)/i;
    $gopt_with_antares_inc = $1;
  
    # check
    my $file = "$gopt_with_antares_inc/io_gcc.hh";
    if(! -e $file) {
      print "*** Error *** You did not specify a valid path to ANTARES I/O includes path using --with-antares-inc=/some/path/\n";
      exit 1;
    }
  }
  else {
     print "*** Error *** You need to specify the ANTARES I/O includes path using --with-antares-inc=/some/path/\n";
     print "*** Error *** Otherwise, you should --disable-antares\n\n";
     exit 1;
  }
}



# ------------------------------------------------
# KM3NET-DATAFORMAT paths
# ------------------------------------------------

# If --enable-km3net was set then the full path to the KM3NeT library must be specified
#
my $gopt_with_km3net_lib = "";
if($gopt_enable_km3net eq "YES") {
  if(($match = grep(/--with-km3net-lib/i, @ARGV)) > 0) {
    $options=~m/--with-km3net-lib=(\S*)/i;
    $gopt_with_km3net_lib = $1;

    # check
    my $file  = "$gopt_with_km3net_lib/libKM3NeTROOT.so";
    if(! -e $file) {
      print "*** Error *** You did not specify a valid path to KM3NET-DATAFORMAT library using --with-km3net-lib=/some/path/\n";
      exit 1;
    }
  }
  else {
    print "*** Error *** You need to specify the path to KM3NET-DATAFORMAT library using --with-km3net-lib=/some/path/\n";
    print "*** Error *** Otherwise, you should --disable-km3net\n\n";
    exit 1;
  }
}

# If --enable-km3net was set then the full path to the KM3NeT includes must be specified
#
my $gopt_with_km3net_inc = "";
if($gopt_enable_km3net eq "YES") {
  if(($match = grep(/--with-km3net-inc/i, @ARGV)) > 0) {
    $options=~m/--with-km3net-inc=(\S*)/i;
    $gopt_with_km3net_inc = $1;

    $string = "km3net-dataformat/offline";
    $gopt_with_km3net_inc =~ s/$string//;
    print "$gopt_with_km3net_inc"; 
  
    # check
    my $file = "$gopt_with_km3net_inc/km3net-dataformat/offline/Evt.hh";
    if(! -e $file) {
      print "*** Error *** You did not specify a valid path to KM3NET-DATAFORMAT includes path using --with-km3net-inc=/some/path/\n";
      exit 1;
    }    
  }
  else {
    print "*** Error *** You need to specify the KM3NET-DATAFORMAT includes path using --with-km3net-inc=/some/path/\n";
    print "*** Error *** Otherwise, you should --disable-km3net\n\n";
    exit 1;
  }
}

if($gopt_enable_km3net eq "YES") {
  print "\nYou enabled the KM3NET-DATAFORMAT. To run MUPAGE: add  $gopt_with_km3net_lib to LD_LIBRARY_PATH\n\n";
}

# ------------------------------------------------
# Antcc paths
# ------------------------------------------------

# If --enable-antcc was set then the full path to the antcc library must be specified
#
my $gopt_with_antcc_lib = "";
if($gopt_enable_antcc eq "YES") {
  if($gopt_enable_antares ne "YES"){
    print "*** Error *** You need to enable ANTARES I/O \n";
    print "*** Error *** Otherwise, you should --disable-antcc\n\n";
    exit 1;
  }
  if(($match = grep(/--with-antcc-lib/i, @ARGV)) > 0) {
    $options=~m/--with-antcc-lib=(\S*)/i;
    $gopt_with_antcc_lib = $1;

    # check
    my $file  = "$gopt_with_antcc_lib/libantcc.a";
    if(! -e $file) {
      print "*** Error *** You did not specify a valid path to antcc library using --with-antcc-lib=/some/path/\n";
      exit 1;
    }
  }
  else {
    print "*** Error *** You need to specify the path to antcc library using --with-antcc-lib=/some/path/\n";
    print "*** Error *** Otherwise, you should --disable-antcc\n\n";
    exit 1;
  }
}

# If --enable-antcc was set then the full path to the antcc includes must be specified
#
my $gopt_with_antcc_inc = "";
if($gopt_enable_antcc eq "YES") {
  if(($match = grep(/--with-antcc-inc/i, @ARGV)) > 0) {
    $options=~m/--with-antcc-inc=(\S*)/i;
    $gopt_with_antcc_inc = $1;
  
    # check
    my $file = "$gopt_with_antcc_inc/AlignEvent.hh";
    if(! -e $file) {
      print "*** Error *** You did not specify a valid path to antcc includes path using --with-antcc-inc=/some/path/\n";
      exit 1;
    }
  }
  else {
    print "*** Error *** You need to specify the antcc includes path using --with-antcc-inc=/some/path/\n";
    print "*** Error *** Otherwise, you should --disable-antcc\n\n";
    exit 1;
  }
}


# ------------------------------------------------
# CLHEP paths
# ------------------------------------------------

# If --enable-antcc was set then the full path to the CLHEP includes must be specified
#

my $gopt_with_clhep_inc = "";
if($gopt_enable_antcc eq "YES") {

  if(($match = grep(/--with-clhep-inc/i, @ARGV)) > 0) {
    $options=~m/--with-clhep-inc=(\S*)/i;
    $gopt_with_clhep_inc = $1;
  }
  else {
    $gopt_with_clhep_inc = $ENV{'INCCLHEP'}
  } 

  #check 
  my $file = "$gopt_with_clhep_inc/CLHEP/ClhepVersion.h";
  if(! -e $file) {
    print "*** Error *** You need to specify a valid CLHEP includes path using --with-clhep-inc=/some/path/ or defining the env. variable INCCLHEP \n";
    print "*** Error *** Otherwise, you should --disable-antcc\n\n";
    exit 1;
  }  
}


# Save config options
#
print MKCONF "GOPT_ENABLE_ANTARES=$gopt_enable_antares\n";
print MKCONF "GOPT_ENABLE_KM3NET=$gopt_enable_km3net\n";
print MKCONF "GOPT_ENABLE_ANTCC=$gopt_enable_antcc\n";
print MKCONF "GOPT_WITH_ANTARES_LIB=$gopt_with_antares_lib\n";
print MKCONF "GOPT_WITH_ANTARES_INC=$gopt_with_antares_inc\n";
print MKCONF "GOPT_WITH_KM3NET_LIB=$gopt_with_km3net_lib\n";
print MKCONF "GOPT_WITH_KM3NET_INC=$gopt_with_km3net_inc\n";
print MKCONF "GOPT_WITH_ANTCC_LIB=$gopt_with_antcc_lib\n";
print MKCONF "GOPT_WITH_ANTCC_INC=$gopt_with_antcc_inc\n";
print MKCONF "GOPT_WITH_CLHEP_INC=$gopt_with_clhep_inc\n";

close(MKCONF);

print "\nMUPAGE configuration done, type make to procede with the code compiling\n\n";