#!/usr/bin/env ruby
# frozen_string_literal: true

require 'bundler/setup'
require 'ruby_algebra'

print "RubyMaple © RubyMaple Creators, 2026. No rights reserved.\nPress Ctrl+D to quit.\n"

interp = RubyAlgebra::Interpreter.new
loop do
  print '> '
  inp = $stdin.gets
  break if inp.nil?

  inp = inp.chomp
  next if inp.empty?

  begin
    command = RubyAlgebra::Parser.parse_command(inp)
  rescue StandardError => e
    puts "Syntax error: #{e.message}"
    next
  end
  begin
    puts "< #{interp.execute(command)}"
  rescue StandardError => e
    puts "Calculation error: #{e.message}"
  end
end
puts