module Minimist

# File lib/minimist.rb, line 17
def parse(argv)
  @argv = argv

  out = {
    commands: [],
    options: {}
  }
  skip = false
  type = nil

  argv.each_with_index do |arg, i|
    # reset
    type = nil

    if skip
      skip = false
      next
    end

    REGEX.each do |name, regex|
      match = arg =~ regex

      if match
        type = name
        break
      end
    end

    #
    # arg type method should indicate whether it wants
    # to skip the next value or not
    #
    out, skip = send(type, arg, i, out)
  end

  out
end

# File lib/minimist.rb, line 57
def command(arg, _, argv_object)
  argv_object[:commands] << arg
  [argv_object, false]
end

# File lib/minimist.rb, line 89
def double_dash(arg, index, argv_object)
  match_data = arg.match(/^--([A-Za-z]*-?[A-Za-z]*)=?([A-Za-z0-9]*)/)
  val = true
  should_skip = false

  if !match_data[2].empty?
    argv_object[:options][match_data[1].to_sym] = match_data[2]
  else
    val = true

    if @argv[index + 1] =~ REGEX[:command]
      val = @argv[index + 1]
      should_skip = true
    end

    argv_object[:options][transform(match_data[1].to_sym)] = val
  end

  [argv_object, should_skip]
end

# File lib/minimist.rb, line 110
def double_dash_negation(arg, index, argv_object)
  #
  # regex matvch --no-val into val = true
  #
  match_data = arg.match(/^--no-([A-Za-z]*-?[A-Za-z]*)/)
  argv_object[:options][match_data[1].to_sym] = false

  [argv_object, false]
end

# File lib/minimist.rb, line 65
def single_dash(arg, index, argv_object)
  should_skip = false

  #
  # match -abc, -n5 arg types
  #
  if match_data = arg.match(/^-([A-Za-z])([0-9])$/)
    argv_object[:options][match_data[1].to_sym] = match_data[2]
  elsif @argv[index + 1] =~ /^(\d|[A-Za-z])/
    argv_object[:options][arg.slice(1..-1).to_sym] = transform(@argv[index + 1])
    should_skip = true
  else
    #
    # loop through and apply each letter to the
    # options object
    #
    arg.slice(1..-1).split('').each do |letter|
      argv_object[:options][letter.to_sym] = true
    end
  end

  [argv_object, should_skip]
end

# File lib/minimist.rb, line 120
def transform(val)
  val.to_s.gsub('-', '_').to_sym
end