#!/usr/bin/env perl

use SDL;
use SDLx::App;
use SDL::Event;

my %options;

die <<USAGE if ( in $ARGV[0], qw/ -? -h --help / );
usage: $0 [-hw] [-fullscreen] [-width 640] [-height 480] [-bpp 24]
USAGE

for ( 0 .. @ARGV - 1 ) {
	$options{ $ARGV[$_] } = $ARGV[ $_ + 1 ] || 1;
}

$options{-flags} = SDL_SWSURFACE;
$options{-flags} |= SDL_HWPALETTE  if ( $options{-hw} );
$options{-flags} |= SDL_FULLSCREEN if ( $options{-fullscreen} );

$options{-title} = $0;

$options{-width}  ||= 640;
$options{-height} ||= 480;
$options{-depth}  ||= $options{-bpp} || 24;

my $app = SDLx::App->new(%options);

# SDL::EventState(SDL_KEYUP,SDL_DISABLE);

sub print_modifiers {
	$mod = SDL::GetModState();

	print " modifiers:",
		( $mod & KMOD_LSHIFT ) ? " LSHIFT" : "",
		( $mod & KMOD_RSHIFT ) ? " RSHIFT" : "",
		( $mod & KMOD_LCTRL )  ? " LCTRL"  : "",
		( $mod & KMOD_RCTRL )  ? " RCTRL"  : "",
		( $mod & KMOD_LALT )   ? " LALT"   : "",
		( $mod & KMOD_RALT )   ? " RALT"   : "",
		( $mod & KMOD_LMETA )  ? " LMETA"  : "",
		( $mod & KMOD_RMETA )  ? " RMETA"  : "",
		( $mod & KMOD_CAPS )   ? " CAPS"   : "",
		( $mod & KMOD_NUM )    ? " NUM"    : "",
		( $mod & KMOD_MODE )   ? " MODE"   : "",
		"\n";
}

sub print_key {
	my ($e) = @_;

	print "pressed "  if ( SDL::KeyEventState($e) == SDL_PRESSED );
	print "released " if ( SDL::KeyEventState($e) == SDL_RELEASED );

	my $sym = SDL::KeyEventSym($e);

	if ($sym) {
		print SDL::GetKeyName($sym);
	} else {
		printf "Unknown Key (scancode = %d) ", SDL::KeyEventScanCode($e);
	}

}

my $event = SDL::Event->new;

my $done = 0;

$process_keys = sub {
	print_key( $_[0] );
	print_modifiers();
};

my %events = (
	SDL_KEYUP()   => $process_keys,
	SDL_KEYDOWN() => $process_keys,
	SDL_QUIT()    => sub { $done = 1; },
);

while ( !$done && $event->wait() ) {
	if ( $events{ $event->type() } ) {
		&{ $events{ $event->type() } }($$event);
	}
}