path: root/bot/exts/evergreen/trivia_quiz.py

import asyncio
import json
import logging
import random
from pathlib import Path

import discord
from discord.ext import commands
from fuzzywuzzy import fuzz

from bot.bot import Bot
from bot.constants import Roles


logger = logging.getLogger(__name__)


WRONG_ANS_RESPONSE = [
    "No one answered correctly!",
    "Better luck next time"
]


class TriviaQuiz(commands.Cog):
    """A cog for all quiz commands."""

    def __init__(self, bot: Bot) -> None:
        self.bot = bot
        self.questions = self.load_questions()
        self.game_status = {}  # A variable to store the game status: either running or not running.
        self.game_owners = {}  # A variable to store the person's ID who started the quiz game in a channel.
        self.question_limit = 4
        self.player_scores = {}  # A variable to store all player's scores for a bot session.
        self.game_player_scores = {}  # A variable to store temporary game player's scores.
        self.categories = {
            "general": "Test your general knowledge"
            # "retro": "Questions related to retro gaming."
        }

    @staticmethod
    def load_questions() -> dict:
        """Load the questions from the JSON file."""
        p = Path("bot", "resources", "evergreen", "trivia_quiz.json")
        with p.open(encoding="utf8") as json_data:
            questions = json.load(json_data)
            return questions

    @commands.group(name="quiz", aliases=["trivia"], invoke_without_command=True)
    async def quiz_game(self, ctx: commands.Context, category: str = None) -> None:
        """
        Start a quiz!

        Questions for the quiz can be selected from the following categories:
        - general : Test your general knowledge. (default)
        (More to come!)
        """
        if ctx.channel.id not in self.game_status:
            self.game_status[ctx.channel.id] = False

        if ctx.channel.id not in self.game_player_scores:
            self.game_player_scores[ctx.channel.id] = {}

        # Stop game if running.
        if self.game_status[ctx.channel.id] is True:
            await ctx.send(
                f"Game is already running..."
                f"do `{self.bot.command_prefix}quiz stop`"
            )
            return

        # Send embed showing available categories if inputted category is invalid.
        if category is None:
            category = random.choice(list(self.categories))

        category = category.lower()
        if category not in self.categories:
            embed = self.category_embed()
            await ctx.send(embed=embed)
            return

        # Start game if not running.
        if self.game_status[ctx.channel.id] is False:
            self.game_owners[ctx.channel.id] = ctx.author
            self.game_status[ctx.channel.id] = True
            start_embed = self.make_start_embed(category)

            await ctx.send(embed=start_embed)  # send an embed with the rules
            await asyncio.sleep(1)

        topic = self.questions[category]

        done_question = []
        hint_no = 0
        answer = None
        while self.game_status[ctx.channel.id]:
            # Exit quiz if number of questions for a round are already sent.
            if len(done_question) > self.question_limit and hint_no == 0:
                await ctx.send("The round has ended.")
                await self.declare_winner(ctx.channel, self.game_player_scores[ctx.channel.id])

                self.game_status[ctx.channel.id] = False
                del self.game_owners[ctx.channel.id]
                self.game_player_scores[ctx.channel.id] = {}

                break

            # If no hint has been sent or any time alert. Basically if hint_no = 0  means it is a new question.
            if hint_no == 0:
                # Select a random question which has not been used yet.
                while True:
                    question_dict = random.choice(topic)
                    if question_dict["id"] not in done_question:
                        done_question.append(question_dict["id"])
                        break

                q = question_dict["question"]
                answer = question_dict["answer"]

                embed = discord.Embed(colour=discord.Colour.gold())
                embed.title = f"Question #{len(done_question)}"
                embed.description = q
                await ctx.send(embed=embed)  # Send question embed.

            # A function to check whether user input is the correct answer(close to the right answer)
            def check(m: discord.Message) -> bool:
                return (
                    m.channel == ctx.channel
                    and fuzz.ratio(answer.lower(), m.content.lower()) > 85
                )

            try:
                msg = await self.bot.wait_for("message", check=check, timeout=10)
            except asyncio.TimeoutError:
                # In case of TimeoutError and the game has been stopped, then do nothing.
                if self.game_status[ctx.channel.id] is False:
                    break

                # if number of hints sent or time alerts sent is less than 2, then send one.
                if hint_no < 2:
                    hint_no += 1
                    if "hints" in question_dict:
                        hints = question_dict["hints"]
                        await ctx.send(f"**Hint #{hint_no+1}\n**{hints[hint_no]}")
                    else:
                        await ctx.send(f"{30 - hint_no * 10}s left!")

                # Once hint or time alerts has been sent 2 times, the hint_no value will be 3
                # If hint_no > 2, then it means that all hints/time alerts have been sent.
                # Also means that the answer is not yet given and the bot sends the answer and the next question.
                else:
                    if self.game_status[ctx.channel.id] is False:
                        break

                    response = random.choice(WRONG_ANS_RESPONSE)
                    await ctx.send(response)
                    await self.send_answer(ctx.channel, question_dict)
                    await asyncio.sleep(1)

                    hint_no = 0  # init hint_no = 0 so that 2 hints/time alerts can be sent for the new question.

                    await self.send_score(ctx.channel, self.game_player_scores[ctx.channel.id])
                    await asyncio.sleep(2)
            else:
                if self.game_status[ctx.channel.id] is False:
                    break

                # Reduce points by 25 for every hint/time alert that has been sent.
                points = 100 - 25*hint_no
                if msg.author in self.game_player_scores[ctx.channel.id]:
                    self.game_player_scores[ctx.channel.id][msg.author] += points
                else:
                    self.game_player_scores[ctx.channel.id][msg.author] = points

                # Also updating the overall scoreboard.
                if msg.author in self.player_scores:
                    self.player_scores[msg.author] += points
                else:
                    self.player_scores[msg.author] = points

                hint_no = 0

                await ctx.send(f"{msg.author.mention} got the correct answer :tada: {points} points!")
                await self.send_answer(ctx.channel, question_dict)
                await self.send_score(ctx.channel, self.game_player_scores[ctx.channel.id])
                await asyncio.sleep(2)

    @staticmethod
    def make_start_embed(category: str) -> discord.Embed:
        """Generate a starting/introduction embed for the quiz."""
        start_embed = discord.Embed(colour=discord.Colour.red())
        start_embed.title = "Quiz game Starting!!"
        start_embed.description = "Each game consists of 5 questions.\n"
        start_embed.description += "**Rules :**\nNo cheating and have fun!"
        start_embed.description += f"\n **Category** : {category}"
        start_embed.set_footer(
            text="Points for each question reduces by 25 after 10s or after a hint. Total time is 30s per question"
        )
        return start_embed

    @quiz_game.command(name="stop")
    async def stop_quiz(self, ctx: commands.Context) -> None:
        """
        Stop a quiz game if its running in the channel.

        Note: Only mods or the owner of the quiz can stop it.
        """
        if self.game_status[ctx.channel.id] is True:
            # Check if the author is the game starter or a moderator.
            if (
                ctx.author == self.game_owners[ctx.channel.id]
                or any(Roles.moderator == role.id for role in ctx.author.roles)
            ):
                await ctx.send("Quiz stopped.")
                await self.declare_winner(ctx.channel, self.game_player_scores[ctx.channel.id])

                self.game_status[ctx.channel.id] = False
                del self.game_owners[ctx.channel.id]
                self.game_player_scores[ctx.channel.id] = {}
            else:
                await ctx.send(f"{ctx.author.mention}, you are not authorised to stop this game :ghost:!")
        else:
            await ctx.send("No quiz running.")

    @quiz_game.command(name="leaderboard")
    async def leaderboard(self, ctx: commands.Context) -> None:
        """View everyone's score for this bot session."""
        await self.send_score(ctx.channel, self.player_scores)

    @staticmethod
    async def send_score(channel: discord.TextChannel, player_data: dict) -> None:
        """A function which sends the score."""
        if len(player_data) == 0:
            await channel.send("No one has made it onto the leaderboard yet.")
            return

        embed = discord.Embed(colour=discord.Colour.blue())
        embed.title = "Score Board"
        embed.description = ""

        sorted_dict = sorted(player_data.items(), key=lambda a: a[1], reverse=True)
        for item in sorted_dict:
            embed.description += f"{item[0]} : {item[1]}\n"

        await channel.send(embed=embed)

    @staticmethod
    async def declare_winner(channel: discord.TextChannel, player_data: dict) -> None:
        """Announce the winner of the quiz in the game channel."""
        if player_data:
            highest_points = max(list(player_data.values()))
            no_of_winners = list(player_data.values()).count(highest_points)

            # Check if more than 1 player has highest points.
            if no_of_winners > 1:
                word = "You guys"
                winners = []
                points_copy = list(player_data.values()).copy()

                for _ in range(no_of_winners):
                    index = points_copy.index(highest_points)
                    winners.append(list(player_data.keys())[index])
                    points_copy[index] = 0

                winners_mention = " ".join(winner.mention for winner in winners)
            else:
                word = "You"
                author_index = list(player_data.values()).index(highest_points)
                winner = list(player_data.keys())[author_index]
                winners_mention = winner.mention

            await channel.send(
                f"Congratulations {winners_mention} :tada: "
                f"{word} have won this quiz game with a grand total of {highest_points} points!"
            )

    def category_embed(self) -> discord.Embed:
        """Build an embed showing all available trivia categories."""
        embed = discord.Embed(colour=discord.Colour.blue())
        embed.title = "The available question categories are:"
        embed.set_footer(text="If a category is not chosen, a random one will be selected.")
        embed.description = ""

        for cat, description in self.categories.items():
            embed.description += f"**- {cat.capitalize()}**\n{description.capitalize()}\n"

        return embed

    @staticmethod
    async def send_answer(channel: discord.TextChannel, question_dict: dict) -> None:
        """Send the correct answer of a question to the game channel."""
        answer = question_dict["answer"]
        info = question_dict["info"]
        embed = discord.Embed(color=discord.Colour.red())
        embed.title = f"The correct answer is **{answer}**\n"
        embed.description = ""

        if info != "":
            embed.description += f"**Information**\n{info}\n\n"

        embed.description += "Let's move to the next question.\nRemaining questions: "
        await channel.send(embed=embed)


def setup(bot: Bot) -> None:
    """Load the TriviaQuiz cog."""
    bot.add_cog(TriviaQuiz(bot))