class UniversalTranslator

# File lib/universaltranslator.rb, line 5
def initialize
  @translations = {
    'km' => 1000,
    'hm' => 100,
    'dam' => 10,
    'm' => 1,
    'dm' => 0.1,
    'cm' => 0.01,
    'mm' => 0.001
  }
end

# File lib/universaltranslator.rb, line 68
def calculate_and_print(value, from, to)
  outputs = []
  i = 0
  loop do
    break if i == value.length

    tmp_from = from[i]
    tmp_to = to[i]

    if value[i] < 1
      tbt = value[i] / tmp_from
      tbt *= tmp_to
    else
      tbt = value[i] * tmp_from
      tbt /= tmp_to
    end
    outputs << tbt
    i += 1
  end
  file = File.open('output.txt', 'w')
  file.puts 'Value Desde Hasta Output'
  i = 0
  loop do
    break if i == value.length

    tmp_string = (value[i].to_s + ' ' + @translations.key(from[i]).to_s + ' ' +  @translations.key(to[i]).to_s + ' ' + outputs[i].to_s)
    file.puts tmp_string
    i += 1
  end
  file.close
end

# File lib/universaltranslator.rb, line 17
def get_data(input)
  lineslist = []

  return 'File is empty' if File.zero?(input)

  # Check if input is valid
  begin
    File.foreach(input) { |line| lineslist.push(line) }
  rescue StandardError
    return 'Input is invalid'
  end

  values = []
  froms = []
  tos = []
  i = 0

  loop do
    i += 1

    break if i == lineslist.length

    # Check if there is missing data
    tmp = lineslist[i].split(' ')
    return 'There is missing data' if tmp.length != 3

    # Check if value is valid
    if tmp[0].to_i.zero?
      return 'Your value is not valid or is 0'
    else
      values << tmp[0].to_f
    end

    # Check if initial metric unit is valid
    if @translations.key?(tmp[1])
      froms << @translations[tmp[1]].to_f
    else
      return 'There is an error in a initial metric unit'
    end

    # Check if destiny metric unit is valid
    if @translations.key?(tmp[2])
      tos << @translations[tmp[2]].to_f
    else
      return 'There is an error in a destiny metric unit'
    end
  end
  calculate_and_print(values, froms, tos)
  'Succesfully Made Output'
end