"""
Study extension for qrm
---
Copyright (C) 2019 Abigail Gold, 0x5c

This file is part of discord-qrm2 and is released under the terms of the GNU
General Public License, version 2.
"""

import random
import json

import discord.ext.commands as commands

import aiohttp

import common as cmn


class StudyCog(commands.Cog):
    def __init__(self, bot: commands.Bot):
        self.bot = bot
        self.lastq = dict()
        self.source = 'Data courtesy of [HamStudy.org](https://hamstudy.org/)'

    @commands.command(name="hamstudy", aliases=['rq', 'randomquestion', 'randomq'], category=cmn.cat.study)
    async def _random_question(self, ctx: commands.Context, level: str = None):
        '''Gets a random question from the Technician, General, and/or Extra question pools.'''
        tech_pool = 'E2_2018'
        gen_pool = 'E3_2019'
        extra_pool = 'E4_2016'

        embed = cmn.embed_factory(ctx)
        with ctx.typing():
            selected_pool = None
            try:
                level = level.lower()
            except AttributeError:  # no level given (it's None)
                pass

            if level in ['t', 'technician', 'tech']:
                selected_pool = tech_pool

            if level in ['g', 'gen', 'general']:
                selected_pool = gen_pool

            if level in ['e', 'ae', 'extra']:
                selected_pool = extra_pool

            if (level is None) or (level == 'all'):  # no pool given or user wants all, so pick a random pool
                selected_pool = random.choice([tech_pool, gen_pool, extra_pool])
            if (level is not None) and (selected_pool is None):  # unrecognized pool given by user
                embed.title = 'Error in HamStudy command'
                embed.description = ('The question pool you gave was unrecognized. '
                                     'There are many ways to call up certain question pools - try ?rq t, g, or e. '
                                     '\n\nNote that currently only the US question pools are available.')
                embed.colour = cmn.colours.bad
                await ctx.send(embed=embed)
                return

            async with aiohttp.ClientSession() as session:
                async with session.get(f'https://hamstudy.org/pools/{selected_pool}') as resp:
                    if resp.status != 200:
                        embed.title = 'Error in HamStudy command'
                        embed.description = 'Could not load questions'
                        embed.colour = cmn.colours.bad
                        await ctx.send(embed=embed)
                        return
                    pool = json.loads(await resp.read())['pool']

            # Select a question
            pool_section = random.choice(pool)['sections']
            pool_questions = random.choice(pool_section)['questions']
            question = random.choice(pool_questions)

            embed.title = question['id']
            embed.description = self.source
            embed.colour = cmn.colours.good
            embed.add_field(name='Question:', value=question['text'], inline=False)
            embed.add_field(name='Answers:', value='**A:** ' + question['answers']['A'] +
                            '\n**B:** ' + question['answers']['B'] +
                            '\n**C:** ' + question['answers']['C'] +
                            '\n**D:** ' + question['answers']['D'],
                            inline=False)
            embed.add_field(name='Answer:', value='Type _?rqa_ for answer', inline=False)
            if 'image' in question:
                image_url = f'https://hamstudy.org/_1330011/images/{selected_pool.split("_",1)[1]}/{question["image"]}'
                embed.set_image(url=image_url)
            self.lastq[ctx.message.channel.id] = (question['id'], question['answer'])
        await ctx.send(embed=embed)

    @commands.command(name="hamstudyanswer", aliases=['rqa', 'randomquestionanswer', 'randomqa', 'hamstudya'],
                      category=cmn.cat.study)
    async def _q_answer(self, ctx: commands.Context, answer: str = None):
        '''Returns the answer to question last asked (Optional argument: your answer).'''
        with ctx.typing():
            correct_ans = self.lastq[ctx.message.channel.id][1]
            q_num = self.lastq[ctx.message.channel.id][0]
            embed = cmn.embed_factory(ctx)
            if answer is not None:
                answer = answer.upper()
                if answer == correct_ans:
                    result = f'Correct! The answer to {q_num} was **{correct_ans}**.'
                    embed.title = f'{q_num} Answer'
                    embed.description = f'{self.source}\n\n{result}'
                    embed.colour = cmn.colours.good
                else:
                    result = f'Incorrect. The answer to {q_num} was **{correct_ans}**, not **{answer}**.'
                    embed.title = f'{q_num} Answer'
                    embed.description = f'{self.source}\n\n{result}'
                    embed.colour = cmn.colours.bad
            else:
                result = f'The correct answer to {q_num} was **{correct_ans}**.'
                embed.title = f'{q_num} Answer'
                embed.description = f'{self.source}\n\n{result}'
                embed.colour = cmn.colours.neutral
        await ctx.send(embed=embed)


def setup(bot: commands.Bot):
    bot.add_cog(StudyCog(bot))