#!/usr/bin/perl
use strict;
use warnings;
use File::Basename;
############################
#
# Name :     newscript 
# Usage:     Makes ready to use script templates for 
#            Bash and Perl only at the moment. It includes 
#            the shebang line for both. Perl templates 
#            includes some useful pragmas and the option to
#            include the required modules on the command line.
#
############################

# declare some required vars
my ($name, $language);
my $fullname = $0;
my $progname = basename($fullname);

## main program: 

print "Name of the new script  : ";
chomp ($name = <STDIN>);

print "Language of $name script: ";
chomp ($language = <STDIN>);

# If laguage is Bash, make a Bash script
if ($language =~ /bash/i) {
    print "\nMaking a Bash script: $name\n";
    _makebash();


# If language is Perl, make a Perl script    
} elsif ($language =~ /perl/i) {
    print "\nMaking a Perl script: $name\n";
    print "\nAdd modules? ex: File::Basename;\n(use strict and use warning are turned on by default).\n";
    print "[yes/no]: ";
    # check if user wants modules
    chomp (my $addmodule = <STDIN>);
    if ($addmodule =~ /yes/i) {
        my @modules;
        print "\nThis script does NOT add a ';' for you!\nSay 'done' when you're done..\nModules: ";
        while (<STDIN>) {
            last if ($_ =~ /done(;)?/i);
            push @modules, $_;
        }
        _makeperl(@modules);
    } elsif ($addmodule =~ /no/i) { _makeperl();}
    else { 
        print "I assume no.\n";
        _makeperl();
    }



# If language is C, make a C program
} elsif ($language =~ /c/i) {
    print "\nMaking a C program: $name\n";
    # Check if user wants to add more libraries
    print "Add other libraries? ex: <stdlib.h>\nYou may ommit the '<','>'\n[yes/no]: ";
    chomp (my $addlib =  <STDIN>);
    if ($addlib =~ /yes/i) {
        my @libs;
        print "Say 'done' when you are finished.\nLibraries: ";
        while (<>) {
            last if ($_ =~ /done/i);
            push @libs, $_;
        }
    _makec(@libs);
    } elsif ($addlib =~ /no/i) { _makec(); }
    else {
        print "Fine. ONLY <stdio.h> for you !\n";
        _makec();
    }

} else {
    print "This might help you:\n";
    _usage();
}





# Make a bash script
sub _makebash {
    if ($language eq 'bash') {
        $name = "$name.test";
        open (NEWSCRIPT, '>', $name);
        print NEWSCRIPT "#!/bin/bash\n\n";
        close NEWSCRIPT;
        chmod 0700, "$name";
        exec ("emacs -nw +3 $name");
    }
} 



# Make a perl script
sub _makeperl {
    $name = "$name.pl.test";
    my @mods = @_;
    open (NEWSCRIPT, '>', $name);
    print NEWSCRIPT "#!/usr/bin/perl\n\nuse warnings;\nuse strict;\n";
    if (@mods){             # If module is defined, add it to the template.
        for my $mod (@mods) {
            print NEWSCRIPT "use $mod";
        }
    }
    print NEWSCRIPT "\n";
    close NEWSCRIPT;
    print "\n";
    chmod 0700, "$name";
    exec ("emacs -nw +50 $name");

}


# Make a C program
sub _makec {
    $name = "$name.test.c";
    my @library = @_;
    open (NEWPROG, '>', $name);
    print NEWPROG "#include <stdio.h>\n\n";
    if (@library) {
        for my $lib (@library){
            chomp $lib;
            if ($lib =~ /^<.*>$/) {
                print NEWPROG "#include $lib\n";
            } else {
                print NEWPROG "#include <$lib>\n";
            }
        }
    }
    print NEWPROG "\n";
    close NEWPROG;
    print "\n";
    chmod 0700, "$name";
    exec ("emacs -nw +10 $name");
}



# Sets the usage message.
sub _usage {
    print<<EOF;



Usage: $progname [no options yet]
    
    Creates ready to use script templates.
   
    The script will first ask you for the name of your program,
    then the language in which you want it written.

    If your chosen language is supported, it will make an empty
    script, with your name and 'test' appended to it. The script
    then makes an exec call to emacs -nw with your new file.
    (not very portable yet ..)

  note: If your chosen language is Perl, The script will ask you
  if you wish to import more modules. If you do want more input them
  then followed by a ';' and input 'done' when finish.

  bash:
    #/bin/bash

  perl:
    #/usr/bin/perl
    use warnings;
    use strict;
    use [yourmods];

  C:
    #include <stdio.h>


EOF
}