#!/usr/bin/env ruby

require 'io/console'
require 'image_size'

def files(ext)
	fs = []
	fs << Dir.glob(ext.downcase).sort
	fs << Dir.glob(ext.upcase).sort
	fs
end

def file_size(path)
	File::stat(path).size.to_s.reverse.scan(/.{1,3}/).join(',').reverse
end

term_width	= `tput cols`.to_i  * 2
term_height	= `tput lines`.to_i * 4

images = ARGV

images.size == 0 and ['*.jpg', '*.jpeg', '*.png', '*.gif'].each {|ext|
	images << files(ext)
}
images.flatten!

images.size == 0 and (warn('No image files.'); exit(1))

n = 0; loop {
	image = images[n % images.size]

	# TODO: check file type
	# TODO: / + *

	image_size = ImageSize.path(image)
	wr = image_size.width  / term_width.to_f
	hr = image_size.height / term_height.to_f

	width = wr > hr ? width = term_width * 0.9 : width = term_width * wr / hr * 0.9

	system('catimg -r 2 -w %d %s' % [width, image])
	puts('(%d / %d)  %s  [ %s: %d x %d ]  %s bytes' % \
		[n % images.size + 1, images.size, image, image_size.format, image_size.width, image_size.height, file_size(image)])

	c = STDIN.getch

 	c == ?q and break
	c == ?\C-c and break

	c == ' ' and n += 1
	c == ?j and n += 1
	c == ?k and n -= 1

	c == ?0 and n = 0
	c == ?G and n = images.size - 1

	c == ?v and system('eom %s' % image)

	puts
}

__END__