#!/usr/bin/env perl
use strict;
use warnings;
local $| = 1 ;

# --------------------------------------------------------
# Prototype runtool, this version will generate Nx JUnit test-classes.
# --------------------------------------------------------

# --------------------------------------------------------
# Few thing that may need to be re-cofigured
# --------------------------------------------------------

my $MYHOME = "/media/sf_T2benchmark/testingtools/t3" ; 
my $JAVA = "/usr/lib/jvm/jdk1.8.0_05/jre/bin/java" ;
my $CPseparator = ":" ;
     
# derived paths, no need to change this
my $T3JAR = $MYHOME . "/jars/T3v0.jar" ;
my $Junit = $MYHOME . "/jars/junit.jar" ;
my $Hamcrest = $MYHOME . "/jars/hamcrest-core-1.3.jar" ;
#my $ALLJARS = $MYHOME . "/jars" ;

# --------------------------------------------------------
# Some help-functions first ...
# --------------------------------------------------------

#sub debugEcho {
#    print "[debug] " . $_[0]
#}

sub debugEcho { }

sub mkTempDirs {
   debugEcho "creating temp-dirs" ;
   my $DATADir = $MYHOME . "/temp/data" ;
   my $testcasesDir = $MYHOME . "/temp/testcases" ;
   if (!(-e $DATADir)) {
      system("mkdir -p " . $DATADir) ;
   }
   if (!(-e $testcasesDir)) {
      system("mkdir -p " . $testcasesDir) ;
   }
}

sub BENCHMARKtoken {
   my $token = readline(*STDIN) ; chomp $token ;
   if ($token ne "BENCHMARK") { 
      print STDERR "ERROR: expecting BENCHMARK token" ;
      exit 0 ;
   }
}

sub readPath {
  my $t = <STDIN> ; chomp $t ; return $t ;
}
 
sub readNum {
  my $N = <STDIN> ; chomp $N ;
  return 0 + $N ;
} 
  
sub readContextClassPaths {
  my $N = $_[0] ;
  my $paths = "." ;
  my $k ;
  for ($k=0; $k<$N; $k++) {
     my $p = <STDIN> ;
     chomp $p ;
     $paths = $paths . $CPseparator ; 
     $paths = $paths . $p ;
  }
  return $paths ;
}
 
# for passing the path to T3-jar .. not sure if this is a good way
# to do it.
sub announcePathToTestingTool {
   print "CLASSPATH\n" ;
   #print "2\n" ;
   #print ($T3JAR . "\n") ;
   #print ($ALLJARS . "\n") ;
   print "1\n" ;
   print ($T3JAR . "\n") ;
   print ("READY\n") ;
}


# replaceIt(s,a,b) replaces occurences of string a in string s, with b
sub replaceIt {
   my $str     = $_[0] ;
   my $find    = $_[1];
   my $replace = $_[2] ;
   # escape regex metachars if present:
   $find    = quotemeta $find; 
   $replace = quotemeta $replace; 
   $str =~ s/$find/$replace/g ;
   return $str ;
}      

# as replaceIt, but without replcing metachars:
sub replaceIt2 {
   my $str     = $_[0] ;
   my $find    = $_[1];
   my $replace = $_[2] ;
   $str =~ s/$find/$replace/g ;
   return $str ;
}
   

my $NUMofTestClasses = 50 ;
#my $NUMofTestClasses = 10 ;
    
# For creating a Junit test-class wrapper
sub mkJunit {
    my $CUT = $_[0] ;
    my $CUTdashed = replaceIt($CUT,".","_") ;
    my $template  = $MYHOME . "/T3TestClassWrapper_TC_Template.java" ;  
    
    open (TemplateFile,"<",$template);
    
    # read the template Test-class:
    my $Test = "" ;
    while (<TemplateFile>) { $Test = $Test . $_ ; }
    close (TemplateFile); 
       
    # generate N-times test-classes
    my $k=0 ;
    my $canBreak = 0 ;
	# avoiding using "break" syntax 
    while ($k < $NUMofTestClasses && $canBreak==0) {
       my $ADTtestclassName    = "ADTTest" . $k . "_" . $CUTdashed ;
	   my $nonADTtestclassName = "nonADTTest" . $k . "_" . $CUTdashed ;
       my $ADTtestclass     = $MYHOME . "/temp/testcases/" . $ADTtestclassName    . ".java" ;
	   my $nonADTtestclass  = $MYHOME . "/temp/testcases/" . $nonADTtestclassName . ".java" ;
	   
	   $canBreak = 1 ; 
	   
	   # for ADT suites:
       my $ADTtrFilePattern    = "ADT_"    . $CUT . "_S" . $k ;
	   if (trFileExists($ADTtrFilePattern)) {
	      $canBreak = 0 ;
          # only generate Junit if the corresponding tr-file exists:
          open (TestClassFile,">",$ADTtestclass) ;
          my $Instance = replaceIt2($Test, "xxxClass", $ADTtestclassName) ;  
          $Instance= replaceIt2($Instance,"xxxSuite", $ADTtrFilePattern) ;
          $Instance = replaceIt2($Instance,"xxxLog"  , $MYHOME . "/logs/REPLAY_" . $ADTtestclassName) ;
          $Instance = replaceIt2($Instance,"xxxTargetDir"  , $MYHOME . "/temp/testcases/") ; 
          print TestClassFile $Instance ;
          close (TestClassFile) ;
       }
	   
	   # for non-ADT suites:
	   my $nonADTtrFilePattern = "nonADT_" . $CUT . "_S" . $k ;
       if (trFileExists($nonADTtrFilePattern)) {
	      $canBreak = 0 ;
          # only generate Junit if the corresponding tr-file exists:
          open (TestClassFile,">",$nonADTtestclass) ;
          my $Instance = replaceIt2($Test, "xxxClass", $nonADTtestclassName) ;  
          $Instance= replaceIt2($Instance,"xxxSuite", $nonADTtrFilePattern) ;
          $Instance = replaceIt2($Instance,"xxxLog"  , $MYHOME . "/logs/REPLAY_" . $nonADTtestclassName) ;
          $Instance = replaceIt2($Instance,"xxxTargetDir"  , $MYHOME . "/temp/testcases/") ; 
          print TestClassFile $Instance ;
          close (TestClassFile) ;
       }
	      
       # if neither file exist, canBreak would be 1; and the loop will then break
       $k ++ ;
    }  
}
 
sub trFileExists {
   my $trFilePattern = $_[0] ;
   my $TRdir = $MYHOME . "/temp/testcases" ;
   opendir(DIR, $TRdir) ;
   while (my $file = readdir(DIR)) {
       if (index($file, $trFilePattern) != -1) { return 1 ; }
   } 
   return 0 ;
}

# to run T3; runT3(CUT,class-dir of CUT, class-path context) 
sub runT3 {
   my $CUT = $_[0] ;
   # the root of the class-directory where CUT resides
   my $CUTdir = $_[1] ;
   # class-path to stuffs needed to run CUT:
   my $contextClassPath = $_[2] ;
   
   my $T3 = " Sequenic.T3.T3Cmd "  ;

   my $LOG = $MYHOME  . "/logs/GEN_" . $CUT ;
   
   # T3 parameters for generating regression sequences. The produced suite
   # will be split in N smaller suites.
   my $T3params = "-reg " 
                . "--core=2 "
                . "--prefixlength=6 --variprefix --suffixlength=1 "
                . "--msamples=100 "  
                . "--splitsuite=" . $NUMofTestClasses . " "
                . "--savedir=" . $MYHOME . "/temp/testcases "
                . "--scandir=" . $CUTdir . " "  
				. "--reportStream=System.err " 
				. "--tracePrintStream=System.err " ;
                # surpress logging
                # . " -lf " . $LOG  . " " ;
                   
   my $classpath = "\'" 
            . $T3JAR . $CPseparator 
            . $Junit . $CPseparator
            . $Hamcrest . $CPseparator
            . $CUTdir . $CPseparator . $contextClassPath 
            . "\'" ;
            
   # now calling T3 the 2nd time, to generate regression suites
   system(
     $JAVA . " -ea " 
         . " -Xmx1000m "
         . "-cp " . $classpath . " "
         . $T3 . " " 
         . $T3params 
         . " " . $CUT
         . "  >&2"  # trying to redirect system.out to system.err
    ) ;
    # now generate Junit wrapper too, to prepare for replay:
    mkJunit($CUT) ;
}

# run T3 n-times, for each of n CUTs
sub runLoop {
   my $N      = $_[0] ;
   my $CUTdir = $_[1] ;
   my $contextClassPath = $_[2] ;
   
   my $k ;
   for ($k=0; $k<$N; $k++) {
      mkTempDirs() ;
      my $CUT = <STDIN> ; chomp $CUT ;
      runT3($CUT,$CUTdir,$contextClassPath) ;
      print ("READY\n") ;
   }
}

# --------------------------------------------------------
# Here begins the protocol
# --------------------------------------------------------
 
debugEcho "SBST protocol START\n";
BENCHMARKtoken() ;
my $src = readPath() ;
my $bin = readPath();
my $numOfContextClassPaths  = readNum() ;
my $contextClassPath = readContextClassPaths($numOfContextClassPaths) ;
my $numOfTargetClasses = readNum() ;
announcePathToTestingTool() ;
# Now the protocol is going to pass N x CUTs; we run T3 on each of them:
runLoop($numOfTargetClasses,$bin,$contextClassPath) ;
# DONE.
debugEcho "SBST protocol END" ;
endDEBUG() ;

sub endDEBUG {
   debugEcho ("src = " . $src . "\n") ;
   debugEcho ("bin = " . $bin . "\n") ;
   debugEcho ("N = " . ($numOfContextClassPaths + 1 - 1) . "\n") ;
}