#!/usr/bin/perl -w

$duim = 0;
$appname = shift || &usage;
while(1) {
    if($appname eq '-d' || $appname eq '--duim') {
	$duim = 1;
	$appname = shift || &usage;
    } else {
	last;
    }
}
shift && &usage;

if ($duim) {
    $extra = "\n  use duim;";
    $hello_line = "start-frame(make(<$appname-frame>))";
    $defs = <<"EOD"

define frame <$appname-frame> (<simple-frame>)
  menu-bar (frame) frame.$appname-menu-bar;
  pane $appname-menu-bar (frame)
    make(<menu-bar>, children: vector(frame.file-menu, frame.help-menu));
  pane file-menu (frame)
    make(<menu>, label: "File", children: vector(frame.exit-menu-button));
  pane exit-menu-button (frame)
    make(<menu-button>,
           label: "Exit",
	   activate-callback: method(button) exit-application(0) end);
  pane help-menu (frame)
    make(<menu>, label: "Help", children: vector(frame.about-menu-button));
  pane about-menu-button (frame)
    make(<menu-button>,
           label: "About...",
           activate-callback:
             method(button) start-dialog(make(<about-$appname-dialog>)) end);

  status-bar (frame) frame.$appname-status-bar;
  pane $appname-status-bar (frame)
    make(<status-bar>, label: "Hello, world!");
  
  layout (frame) frame.$appname-layout;
  pane $appname-layout (frame)
    vertically ()
      make(<label>, label: "Hello, world!");
    end;

  keyword title: = "$appname Application";
end frame;

define frame <about-$appname-dialog> (<dialog-frame>)
  layout(frame)
    vertically()
      make(<label>, label: "$appname Application");
    end;
  keyword title: = "About $appname Application";
  keyword cancel-callback: = #f;
end frame;
EOD
} else {
    $extra = "";
    $hello_line = 'format-out("Hello, world!\\n")';
    $defs = '';
}

mkdir $appname, 0777 or die "Can't create directory $appname: $!";
chdir $appname or die "Can't chdir to directory $appname: $!";

&write_file("$appname.lid", <<"EOD");
library: $appname
executable: $appname
files: $appname-exports
  $appname
EOD

&write_file("$appname-exports.dylan", <<"EOD");
module: dylan-user

define library $appname
  use common-dylan;
  use io;$extra
end library;

define module $appname
  use common-dylan;
  use format-out;$extra
end module;
EOD

&write_file("$appname.dylan", <<"EOD");
module: $appname
synopsis: 
author: 
copyright: 
$defs
define function main(name, arguments)
  $hello_line;
  exit-application(0);
end function main;

// Invoke our main() function.
main(application-name(), application-arguments());
EOD

sub write_file {
    local ($filename, $contents) = @_;
    open(OUTPUT, ">$filename") or die "Can't create $filename: $!";
    print OUTPUT $contents;
    close OUTPUT;
}

sub usage {
    print STDERR <<EOD;
Usage:
  make-dylan-app appname
  make-dylan-app -d appname	(include DUIM support)
EOD
    exit 1;
}