module FFaker::Image

def check_format!(format)
  return true if SUPPORTED_FORMATS.include?(format)
  raise ArgumentError, "Supported formats are #{SUPPORTED_FORMATS.join(', ')}"
end

def check_size!(size)
  return true if size =~ /\A\d+x\d+\z/
  raise ArgumentError, 'Size should be specified in format 300x300'
end

def download_file(url)
  file = Tempfile.new('ffaker_image')
  file.binmode
  file << Kernel.open(url).read
  file.close
  File.new(file.path)
end

def file(size = '300x300', format = 'png', bg_color = :random, text_color = :random, text = nil)
  download_file(url(size, format, bg_color, text_color, text))
end

def url(size = '300x300', format = 'png', bg_color = :random, text_color = :random, text = nil)
  check_size!(size)
  check_format!(format)
  bg_color = FFaker::Color.hex_code if bg_color == :random
  text_color = FFaker::Color.hex_code if text_color == :random
  text = CGI.escape(text.to_s)
  "https://via.placeholder.com/#{size}/#{bg_color}/#{text_color}.#{format}?text=#{text}"
end