#!/usr/bin/env ruby

require File.join(File.dirname(__FILE__), "..", "lib", "maths")

# The main script!

parser = Maths::Calculator.new


puts
puts "Welcome to maths (version #{Maths::VERSION})!"
puts "Type \"exit\" to quit."
puts

Readline.completion_proc = Proc.new do |str|
  # TODO: Get this working
end


prompt = "maths> "
while command = Readline.readline(prompt, true)
  break if /exit/i =~ command
  
  if command == "vars" || command == "variables"
    puts
    puts "Defined Variables:"
    Maths::Brain.read.each do |key, value|
      puts "#{key}: #{value}"
    end
    puts
  else
    begin
      puts "= #{parser.parse(command)}"
    rescue ParseError
      puts $!
    end
  end
end