#!/usr/bin/ruby
require 'compiler'
require 'environment'

# zpracovavani argumentu

if ARGV.size < 1
	STDERR.puts "Usage: #$0 input output [draws]"
	STDERR.puts "  input - Input Krunimir file"
	STDERR.puts "  output - Output PNG file (default is test.png)"
	STDERR.puts "  forwards - Number of draws (default means everything is drawn)"
	exit
end

input_file = ARGV.shift
output_file = ARGV.shift || "test.png"
forwards = ARGV.shift.to_i

begin
	# kompilace Krunimirova kodu do bloku Ruby
	compiler = Krunimir::Compiler.new File.read(input_file)
	compiled = compiler.compile

	# spusteni vznikleho bloku v Krunimirove prostredi
	environment = Krunimir::Environment.new(compiled)
	environment.draw(forwards)
	environment.save_to(output_file)

rescue Exception => e
	STDERR.puts "#{e.class} occured: #{e.message}"
	e.backtrace.each do |line|
		STDERR.puts "  #{line}"
	end

	exit 1
end