require 'text2svg/typography'

module Text2svg
  module CLI
    Option = Struct.new(:font, :text_align, :fill, :encoding)

    def start
      o = CLI::Option.new(nil, :left, :black, Encoding::UTF_8)
      OptionParser.new.tap { |opt|
        opt.on('-f', '--font FONT', 'font file path (require)') do |arg|
          o.font = arg
        end
        opt.on('--text-align ALIGN', 'text align left,right or center (default left)', %i(left right center)) do |arg|
          o.text_align = arg
        end
        opt.on('--fill FILL', 'text fill color (default black)') do |arg|
          o.fill = arg
        end
        opt.on('--encoding ENCODING', 'input text encoding (default utf-8)') do |arg|
          o.encoding = Encoding.find(arg)
        end
      }.parse!(ARGV)
      unless o.font
        raise ArgumentError, "require `--font` cli option. see --help"
      end
      text = ARGV[0] || $stdin.read
      puts Text2svg::Typography.build(
        text,
        font: o.font,
        text_align: o.text_align,
        stroke: :none,
        fill: o.fill,
        encoding: o.encoding,
      )
    end
    module_function :start
  end
end