require 'optparse'

opts = OptionParser.new do |opts|
  opts.on( '-l', '--length INT', 'Length of each individuals genome' ) do |length|
    @length = length
  end

  opts.on( '-p', '--population INT', 'Number of individuals in the population' ) do |population|
    @population = population
  end

  opts.on( '-pc', '--prob-crossover DECIMAL', 'Probability of one point crossover occuring' ) do |pc|
    @pc = pc
  end

  opts.on( '-g', '--generation INT', 'Maximum number of generations to run for' ) do |generations|
    @generations = generations
  end

  opts.on( '-pm', '--prob-mutation DECIMAL', 'Probability of gene mutation' ) do |pm|
    @pm = pm
  end

  opts.on( '-s', '--selection-type', [:roulette, :tournament] , 'Selection method to use, {roulette|tournament}' ) do |method|
    @method = method
  end

  opts.on_tail( '-h', '--h', 'Show this usage statement' ) do |help|
    puts opts
  end
end

begin
  opts.parse!( ARGV )
rescue Exeption => e
  puts e, "", opts
  exit
end