text: # coding=utf8
  """
  units.py - Unit conversion module for Sopel
  Copyright © 2013, Elad Alfassa, <elad@fedoraproject.org>
  Copyright © 2013, Dimitri Molenaars, <tyrope@tyrope.nl>
  Licensed under the Eiffel Forum License 2.
  
  """
  from __future__ import unicode_literals, division
  from sopel.module import commands, example, NOLIMIT
  import re
  
  find_temp = re.compile('(-?[0-9]*\.?[0-9]*)[ °]*(K|C|F)', re.IGNORECASE)
  find_length = re.compile('([0-9]*\.?[0-9]*)[ ]*(mile[s]?|mi|inch|in|foot|feet|ft|yard[s]?|yd|(?:milli|centi|kilo|)meter[s]?|[mkc]?m|ly|light-year[s]?|au|astronomical unit[s]?|parsec[s]?|pc)', re.IGNORECASE)
  find_mass = re.compile('([0-9]*\.?[0-9]*)[ ]*(lb|lbm|pound[s]?|ounce|oz|(?:kilo|)gram(?:me|)[s]?|[k]?g)', re.IGNORECASE)
  
  
  def f_to_c(temp):
      return (float(temp) - 32) * 5 / 9
  
  
  def c_to_k(temp):
      return temp + 273.15
  
  
  def c_to_f(temp):
      return (9.0 / 5.0 * temp + 32)
  
  
  def k_to_c(temp):
      return temp - 273.15
  
  
  @commands('temp')
  @example('.temp 100F', '37.78°C = 100.00°F = 310.93K')
  @example('.temp 100C', '100.00°C = 212.00°F = 373.15K')
  @example('.temp 100K', '-173.15°C = -279.67°F = 100.00K')
  def temperature(bot, trigger):
      """
      Convert temperatures
      """
      try:
          source = find_temp.match(trigger.group(2)).groups()
      except (AttributeError, TypeError):
          bot.reply("That's not a valid temperature.")
          return NOLIMIT
      unit = source[1].upper()
      numeric = float(source[0])
      celsius = 0
      if unit == 'C':
          celsius = numeric
      elif unit == 'F':
          celsius = f_to_c(numeric)
      elif unit == 'K':
          celsius = k_to_c(numeric)
  
      kelvin = c_to_k(celsius)
      fahrenheit = c_to_f(celsius)
      bot.reply("{:.2f}°C = {:.2f}°F = {:.2f}K".format(celsius, fahrenheit, kelvin))
  
  
  @commands('length', 'distance')
  @example('.distance 3m', '3.00m = 9 feet, 10.11 inches')
  @example('.distance 3km', '3.00km = 1.86 miles')
  @example('.distance 3 miles', '4.83km = 3.00 miles')
  @example('.distance 3 inch', '7.62cm = 3.00 inches')
  @example('.distance 3 feet', '91.44cm = 3 feet, 0.00 inches')
  @example('.distance 3 yards', '2.74m = 9 feet, 0.00 inches')
  @example('.distance 155cm', '1.55m = 5 feet, 1.02 inches')
  @example('.length 3 ly', '28382191417742.40km = 17635876112814.77 miles')
  @example('.length 3 au', '448793612.10km = 278867421.71 miles')
  @example('.length 3 parsec', '92570329129020.20km = 57520535754731.61 miles')
  def distance(bot, trigger):
      """
      Convert distances
      """
      try:
          source = find_length.match(trigger.group(2)).groups()
      except (AttributeError, TypeError):
          bot.reply("That's not a valid length unit.")
          return NOLIMIT
      unit = source[1].lower()
      numeric = float(source[0])
      meter = 0
      if unit in ("meters", "meter", "m"):
          meter = numeric
      elif unit in ("millimeters", "millimeter", "mm"):
          meter = numeric / 1000
      elif unit in ("kilometers", "kilometer", "km"):
          meter = numeric * 1000
      elif unit in ("miles", "mile", "mi"):
          meter = numeric / 0.00062137
      elif unit in ("inch", "in"):
          meter = numeric / 39.370
      elif unit in ("centimeters", "centimeter", "cm"):
          meter = numeric / 100
      elif unit in ("feet", "foot", "ft"):
          meter = numeric / 3.2808
      elif unit in ("yards", "yard", "yd"):
          meter = numeric / (3.2808 / 3)
      elif unit in ("light-year", "light-years", "ly"):
          meter = numeric * 9460730472580800
      elif unit in ("astronomical unit", "astronomical units", "au"):
          meter = numeric * 149597870700
      elif unit in ("parsec", "parsecs", "pc"):
          meter = numeric * 30856776376340068
  
      if meter >= 1000:
          metric_part = '{:.2f}km'.format(meter / 1000)
      elif meter < 0.01:
          metric_part = '{:.2f}mm'.format(meter * 1000)
      elif meter < 1:
          metric_part = '{:.2f}cm'.format(meter * 100)
      else:
          metric_part = '{:.2f}m'.format(meter)
  
      # Shit like this makes me hate being an American.
      inch = meter * 39.37
      foot = int(inch) // 12
      inch = inch - (foot * 12)
      yard = foot // 3
      mile = meter * 0.000621371192
  
      if yard > 500:
          stupid_part = '{:.2f} miles'.format(mile)
      else:
          parts = []
          if yard >= 100:
              parts.append('{} yards'.format(yard))
              foot -= (yard * 3)
  
          if foot == 1:
              parts.append('1 foot')
          elif foot != 0:
              parts.append('{:.0f} feet'.format(foot))
  
          parts.append('{:.2f} inches'.format(inch))
  
          stupid_part = ', '.join(parts)
  
      bot.reply('{} = {}'.format(metric_part, stupid_part))
  
  
  @commands('weight', 'mass')
  def mass(bot, trigger):
      """
      Convert mass
      """
      try:
          source = find_mass.match(trigger.group(2)).groups()
      except (AttributeError, TypeError):
          bot.reply("That's not a valid mass unit.")
          return NOLIMIT
      unit = source[1].lower()
      numeric = float(source[0])
      metric = 0
      if unit in ("gram", "grams", "gramme", "grammes", "g"):
          metric = numeric
      elif unit in ("kilogram", "kilograms", "kilogramme", "kilogrammes", "kg"):
          metric = numeric * 1000
      elif unit in ("lb", "lbm", "pound", "pounds"):
          metric = numeric * 453.59237
      elif unit in ("oz", "ounce"):
          metric = numeric * 28.35
  
      if metric >= 1000:
          metric_part = '{:.2f}kg'.format(metric / 1000)
      else:
          metric_part = '{:.2f}g'.format(metric)
  
      ounce = metric * .035274
      pound = int(ounce) // 16
      ounce = ounce - (pound * 16)
  
      if pound > 1:
          stupid_part = '{} pounds'.format(pound)
          if ounce > 0.01:
              stupid_part += ' {:.2f} ounces'.format(ounce)
      else:
          stupid_part = '{:.2f} oz'.format(ounce)
  
      bot.reply('{} = {}'.format(metric_part, stupid_part))
  
  if __name__ == "__main__":
      from sopel.test_tools import run_example_tests
      run_example_tests(__file__)
  