# Kyler Olsen
# CS 2450 Final Project
# Apr 2025

from __future__ import annotations
from typing import TYPE_CHECKING
import json
import random

if TYPE_CHECKING:
    from game import Game


class Library:

    __verses: dict
    __games: list[Game]

    def __init__(self):
        with open("data/scripture-frequencies.json", encoding='utf-8') as file:
            self.__verses = json.load(file)
        self.__games = []

    def join_game(self, name: str, game_num: int = -1):
        if game_num == -1:
            for i, game in enumerate(self.__games):
                if not game.active:
                    game_num = i
                    break
            else:
                self.__games.append(Game())
                game_num = len(self.__games) - 1
        self.__games[game_num].add_player(name)

    def get_verse(self, difficulty: int, game: Game):
        url = self.__select_verse(difficulty)
        text = self.__get_verse_text(url)

        game.new_verse(url, text)

    def __select_verse(self, difficulty: int) -> str:

        difficulty_verses = self.__get_verses_by_difficulty(difficulty)

        return difficulty_verses[random.randint(0,len(difficulty_verses)-1)]

    def __get_verse_text(self, url: str) -> str:
        lang = 'eng'
        volume, book_url, chapter_url, verse_url = url[1:].split('/')

        if volume == 'ot': filename = f"data/{lang}.old-testament.json"
        elif volume == 'nt': filename = f"data/{lang}.new-testament.json"
        elif volume == 'bofm': filename = f"data/{lang}.book-of-mormon.json"
        elif volume == 'dc-testament': filename = f"data/{lang}.doctrine-and-covenants.json"
        elif volume == 'pgp': filename = f"data/{lang}.pearl-of-great-price.json"

        with open(filename, encoding='utf-8') as file:
            data = json.load(file)
        for book in data['books']:
            if book['lds_slug'] == book_url:
                for chapter in book['chapters']:
                    if chapter['chapter'] == int(chapter_url):
                        for verse in chapter['verses']:
                            if verse['verse'] == int(verse_url):
                                return verse['text']
        raise ValueError(f'ERROR: VERSE NOT FOUND ({url})')

    def __get_verses_by_difficulty(self, difficulty: int) -> list[str]:
        real_difficulty_upper = pow((10-difficulty)/9, 2) * 500
        real_difficulty_lower = pow((9-difficulty)/9.55, 3) * 500

        difficulty_verses = []
        for key, value in self.__verses.items():
            for i, diff in enumerate(value):
                if real_difficulty_lower <= diff <= real_difficulty_upper:
                    difficulty_verses.append(f"{key}/{i+1}")

        return difficulty_verses