#! /usr/bin/perl
use strict;
use Getopt::Long;

# options
my @optlist = ("h|help!","v|verbose!","copts=s","O!","J=s");
my $result = GetOptions @optlist;
our ($opt_h, $opt_v, $opt_copts, $opt_O, $opt_J);

# -h option || check the number of arguments
if ($opt_h || @ARGV != 2 ) {
    usage();
    exit 1;
}

# local variables
my $echo = "/bin/echo";
my $copts = "[]";
my $prolog_file = $ARGV[0];
my $am_file = $ARGV[1];

my %env;
&init();

# -copts option
if ($opt_copts) {
    my @x =  split(":", $opt_copts);
    foreach (@x) {
	s/^\s+//;
	s/\s+$//;
    }
    foreach my $op (@x) {
	if ($op !~ /^ed|ac|ie|rc|idx|clo$/) {
	    &error("invalid option found, $op.");
	}
    }
    $copts = "[" . join(",", @x) . "]";
} 

# -O option
if ($opt_O) {
#    $copts = "[ed,ac,ie,rc,idx,clo]";
    $copts = "[ed,ac,ie,rc,idx]";
#    $copts = "[ed,ac,ie,rc]";
}

# -J option
if ($opt_J) {
    if ($opt_J =~ /(-cp|-classpath)\s+/) {
	&error("can not use $1 in -J option");
    }
    $env{"system_opts"} .= " $opt_J";
}

# main
if (! -e $prolog_file) {
    &error("file $prolog_file does not exist.");
}

my $arg;
if ($env{"goal"}) {
    $arg .= $env{"goal"} . " ";
}
$arg .= "[\'$prolog_file\', \'$am_file\', $copts].";
my $cmd = "$echo \"$arg\" | " . $env{"system"};
if ($env{"system_opts"}) {
    $cmd .= " " . $env{"system_opts"};
}
if ($env{"system_args"}) {
    $cmd .= " " . $env{"system_args"};
}
if (! $opt_v) {# check -v option
    $cmd .= " 2> /dev/null";
}

&message("{START translating $prolog_file --> $am_file}");
&message($cmd);
system($cmd) && error("translation fails");
&message("{END translating $prolog_file --> $am_file}\n");

exit 0;

# sub
sub usage {
    print "\nUsage: $0 [-options] prolog_file am_file\n";
    print "\n where options include:\n";
    print "\t-h -help         : print this help message\n";
    print "\t-v -verbose      : enable verbose output\n";
    print "\t-copts[:ed|ac|rc|ie|idx|clo]\n";
    print "\t                 : enable each optimised compilation\n";
    print "\t                 :   ed  = eliminate disjunctions\n";
    print "\t                 :   ac  = arithmetic compilation\n";
    print "\t                 :   rc  = optimise recursive call\n";
    print "\t                 :   ie  = inline expansion\n";
    print "\t                 :   idx = switch_on_hash (2nd. level indexing) \n";
    print "\t                 :   clo = generate closure for meta predicates\n";
    print "\t-O               : enable all optimised compilation\n";
    print "\t-J option        : option must be enclosed by '.\n";
    print "\t                 : pass option to the Java Virtual Machine\n";
    print "\t                 : (ex. -J '-Xmx100m -verbose:gc')\n";
    print "\n";
}

sub message {
    my ($x) = @_;
    if ($opt_v) { # check -v option
	print "\% $x\n";
    }
}

sub error {
    my ($x) = @_;
    print "\% ERROR: $x: $0\n";
    exit 1;
}

#sub init {
#    %env = (
#	"goal",        "",
#	"system",      "/Users/banbara/prog/plcafe/PrologCafe095/src/compiler/pl2am.sav",
#	"system_opts", "",
#	"system_args", "",
#	);
#    %env = (
#	"goal",        "load('/Users/banbara/prog/plcafe/PrologCafe095/src/compiler/pl2am.ql'), main.",
#	"system",      "sicstus",
#	"system_opts", "",
#	"system_args", "",
#	);
#    %env = (
#	"goal",        "",
#	"system",      "java",
#	"system_opts", "-cp \$PLCAFEDIR/plcafe.jar:\$CLASSPATH",
#	"system_args", "com.googlecode.prolog_cafe.lang.PrologMain com.googlecode.prolog_cafe.compiler.pl2am:main",
#	);
#}