#! /usr/bin/env python3
# -*- coding: utf-8 -*-
"""
help.py - Sopel Help Module
Copyright 2008, Sean B. Palmer, inamidst.com
Copyright © 2013, Elad Alfassa, <elad@fedoraproject.org>
Licensed under the Eiffel Forum License 2.

http://sopel.chat
"""
from module import commands, rule, example, priority

@rule('$nick' '(?i)(help|doc) +([A-Za-z]+)(?:\?+)?$')
@example('.help tell')
@commands('help', 'commands')
@priority('low')
def help(bot, trigger):
	"""Shows a command's documentation, and possibly an example."""
	if trigger.group(2):
		name = trigger.group(2)
		name = name.lower()

		if name not in bot.doc:
			return
		newlines = ['']
		lines = list(filter(None, bot.doc[name][0]))
		lines = list(map(str.strip, lines))
		for line in lines:
			newlines[-1] = newlines[-1] + ' ' + line
			if line[-1] is '.':
				newlines.append('')
		newlines = list(map(str.strip, newlines))
		if bot.doc[name][1]:
			newlines.append('Ex. ' + bot.doc[name][1])

		for msg in newlines:
			bot.say(msg)
	else:
		command_groups = list(bot.command_groups.values())
		commands = []
		for group in command_groups:
			if type(group) == list:
				commands += group
			else:
				commands += [group]
		commands.sort()
		msg = "Available commands: " + ', '.join(commands)
		bot.say(msg)