#!/usr/bin/env python3
"""
Querying Wolfram Alpha.
"""
import wolframalpha

import config
from module import commands, example

@commands('wa', 'wolfram')
@example('.wa 2+2', '[W|A] 2+2 = 4')
@example(".wa python language release date",
	"[W|A] Python | date introduced = 1991")
def wa_command(bot, trigger):
	"""
	Queries WolframAlpha.
	"""
	if len(trigger.args) < 2:
		return bot.reply("You must provide a query.")
	if not config.wolfram_app_id:
		bot.reply("Wolfram|Alpha API app ID not configured.")
	query = ' '.join(trigger.args[1:])
	app_id = config.wolfram_app_id
	units = config.wolfram_units

	res = wa_query(query, app_id, units)

	bot.msg(f"[\x0304Wolfram\x03] {res}")


def wa_query(query, app_id, units='nonmetric'):
	"""Queries Wolfram."""
	if not app_id:
		return "Wolfram|Alpha API app ID not provided."
	client = wolframalpha.Client(app_id)
	params = (
		('format', 'plaintext'),
		('units', units),
	)

	try:
		res = client.query(input=query, params=params)
	except AssertionError:
		return "Temporary API issue. Try again in a moment."
	except Exception as e:
		print(e)
		return "Error connecting to API. Please find an adult."

	if int(res['@numpods']) == 0:
		return "No results found."

	texts = []
	for pod in res.pods:
		try:
			texts.append(pod.text)
		except AttributeError:
			pass  # pod with no text; skip it
		except Exception as e:
			print(e)
			return "Weird result. Please find an adult."
		if len(texts) >= 2:
			break
			# We only need two results (input and output)

	try:
		query, output = texts[0], texts[1]
	except IndexError:
		return "No text-representable result found."

	output = output.replace('\n', ' | ')
	if not output:
		return query
	return f"\x0310{query} \x03= \x0312{output}"