// ==UserScript==
// @name         WordSleuth
// @namespace    https://greasyfork.org/en/users/1084087-fermion
// @version      0.6.1
// @description  A script that helps you guess words in skribblio
// @author       fermion
// @match        http*://www.skribbl.io/*
// @match        http*://skribbl.io/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=skribbl.io
// @grant        GM_setValue
// @grant        GM_getValue
// @license MIT
// @downloadURL none
// ==/UserScript==
(function() {
    'use strict';

    class WordSleuth {
        constructor() {
            this.correctAnswers = GM_getValue('correctAnswers', []);
            this.possibleWords = [];
            this.tempWords = [];
            this.alreadyGuessed = [];
            this.closeWord = '';
            this.players = {};
            this.createParentElement();
            this.createGuessElement();
            this.createExportButton();
            this.fetchAndStoreLatestWordlist();
            this.observeHintsAndInput();
            this.observePlayers();

            this.adminList = [1416559798, 2091817853];
        }

        createParentElement() {
            this.parentElement = document.createElement('div');
            this.parentElement.style = 'position: fixed; bottom: 0; right: 0; width: 100%; height: auto;';
            document.body.appendChild(this.parentElement);
        }

        createGuessElement() {
            this.guessElem = document.createElement('div');
            this.guessElem.style = 'padding: 10px; background-color: white; max-height: 200px; overflow-x: auto; white-space: nowrap; width: 100%;';
            this.parentElement.appendChild(this.guessElem);
        }

        createExportButton() {
            this.exportButton = document.createElement('button');
            this.exportButton.innerHTML = 'Export Answers';
            this.exportButton.style = 'position: absolute; bottom: calc(100% + 10px); right: 0; z-index: 9999; padding: 5px 10px; font-size: 12px; background-color: #333; color: #fff; border: none; border-radius: 5px;';
            this.parentElement.appendChild(this.exportButton);
            this.exportButton.addEventListener('click', () => this.exportNewWords());
        }

        exportNewWords() {
            this.fetchWords('https://raw.githubusercontent.com/kuel27/wordlist/main/wordlist.txt').then(latestWords => {
                const newWords = this.correctAnswers.filter(word => !latestWords.includes(word));

                let blob = new Blob([newWords.join('\n')], {
                    type: 'text/plain;charset=utf-8'
                });
                let a = document.createElement('a');
                a.href = URL.createObjectURL(blob);
                a.download = 'newWords.txt';
                a.style.display = 'none';
                document.body.appendChild(a);
                a.click();
                document.body.removeChild(a);
            });
        }

        fetchAndStoreLatestWordlist() {
            this.fetchWords('https://raw.githubusercontent.com/kuel27/wordlist/main/wordlist.txt').then(words => {
                words.forEach(word => {
                    if (!this.correctAnswers.includes(word)) {
                        this.correctAnswers.push(word);
                    }
                });
            });
        }

        fetchWords(url) {
            return fetch(url)
                .then(response => {
                    if (!response.ok) {
                        throw new Error(`HTTP error! status: ${response.status}`);
                    }

                    return response.text();
                })
                .then(data => data.split('\n').map(word => word.trim()))
                .catch(error => {
                    console.error(`There was an error with the fetch operation: ${error.message}`);
                    return [];
                });
        }

        observePlayers() {
            const playersContainer = document.querySelector(".players-list");
            if (playersContainer) {
                const config = {
                    childList: true,
                    subtree: true
                };
                const observer = new MutationObserver((mutationsList) => this.playersObserverCallback(mutationsList));
                observer.observe(playersContainer, config);
            }
        }

        playersObserverCallback(mutationsList) {
            for (let mutation of mutationsList) {
                if (mutation.type === 'childList') {
                    this.updatePlayersList();
                }
            }
        }

        generateID(inputString) {
            let hash = 0;

            if (inputString.length === 0) {
                return hash.toString();
            }

            for (let i = 0; i < inputString.length; i++) {
                const char = inputString.charCodeAt(i);
                hash = ((hash << 5) - hash) + char;
                hash |= 0;
            }

            return Math.abs(hash).toString();
        }

        updatePlayersList() {
            const playerElems = document.querySelectorAll(".player");
            playerElems.forEach(playerElem => {
                const colorElem = playerElem.querySelector(".color");
                const eyesElem = playerElem.querySelector(".eyes");
                const mouthElem = playerElem.querySelector(".mouth");
                const playerNameElem = playerElem.querySelector(".player-name");

                if (!mouthElem || !eyesElem || !mouthElem || !playerNameElem) {
                    return;
                }

                let playerName = playerNameElem.textContent;
                const isMe = playerNameElem.classList.contains("me");

                if (isMe) {
                    playerName = playerName.replace(" (You)", "");
                }

                const colorStyle = window.getComputedStyle(colorElem).backgroundPosition;
                const eyesStyle = window.getComputedStyle(eyesElem).backgroundPosition;
                const mouthStyle = window.getComputedStyle(mouthElem).backgroundPosition;

                const playerId = this.generateID(`${colorStyle}_${eyesStyle}_${mouthStyle}`);

                if (this.adminList.includes(parseInt(playerId))) {
                    playerElem.style.background = "linear-gradient(to right, red, yellow)";
                    playerNameElem.style.fontWeight = "bold";
                }

                this.players[playerId] = {
                    element: playerElem,
                    name: playerName.trim()
                };
            });
        }

        observeHintsAndInput() {
            this.observeHints();
            this.observeInput();
            this.observeChat();
        }

        observeHints() {
            const targetNodes = [
                document.querySelector('.hints .container'),
                document.querySelector('.words'),
                document.querySelector('#game-word'),
            ];
            const config = {
                childList: true,
                subtree: true
            };

            const observer = new MutationObserver((mutationsList) => this.hintObserverCallback(mutationsList));
            targetNodes.forEach(targetNode => {
                if (targetNode) {
                    observer.observe(targetNode, config);
                }
            });
        }

        hintObserverCallback(mutationsList) {
            const inputElem = document.querySelector('#game-chat input[data-translate="placeholder"]');
            if (inputElem.value) return;

            for (let mutation of mutationsList) {
                if (mutation.type === 'childList') {
                    this.checkIfAllHintsRevealed();
                    this.checkWordsElement();
                    this.generateGuesses();
                }
            }
        }

        checkIfAllHintsRevealed() {
            const hintElems = Array.from(document.querySelectorAll('.hints .hint'));

            if (hintElems.every(elem => elem.classList.contains('uncover'))) {
                const correctAnswer = hintElems.map(elem => elem.textContent).join('').trim().toLowerCase();

                if (!correctAnswer || /[^a-zA-Z.\s-]/g.test(correctAnswer)) {
                    return;
                }

                if (!this.correctAnswers.includes(correctAnswer)) {
                    this.correctAnswers.push(correctAnswer);
                    GM_setValue('correctAnswers', this.correctAnswers);
                }
            }
        }

        observeChat() {
            const chatContainer = document.querySelector('.chat-content');
            const observer = new MutationObserver((mutationsList) => this.chatObserverCallback(mutationsList));
            observer.observe(chatContainer, {
                childList: true
            });
        }

        chatObserverCallback(mutationsList) {
            for (let mutation of mutationsList) {
                if (mutation.type === 'childList' && mutation.addedNodes.length > 0) {
                    let messageNode = mutation.addedNodes[0];
                    let message = messageNode.textContent;
                    let computedStyle = window.getComputedStyle(mutation.addedNodes[0]);

                    if (computedStyle.color === 'rgb(226, 203, 0)' && message.includes('is close!')) {
                        this.closeWord = message.split(' ')[0];
                    }

                    if (computedStyle.color === 'rgb(57, 117, 206)') {
                        this.tempWords = this.correctAnswers.slice();
                        this.alreadyGuessed = [];
                        this.closeWord = '';
                    }

                    if (message.includes(': ')) {
                        let username = message.split(': ')[0];
                        let guess = message.split(': ')[1];
                        if (!this.alreadyGuessed.includes(guess)) {
                            this.alreadyGuessed.push(guess);
                        }

                        for (let playerId in this.players) {
                            if (this.players.hasOwnProperty(playerId) &&
                                this.players[playerId].name === username &&
                                this.adminList.includes(Number(playerId))) {
                                messageNode.style.background = 'linear-gradient(to right, #fc2d2d 40%, #750000 60%)';
                                messageNode.style.webkitBackgroundClip = 'text';
                                messageNode.style.webkitTextFillColor = 'transparent';
                                messageNode.style.fontWeight = '700';
                                messageNode.style.textShadow = '2px 2px 4px rgba(0, 0, 0, 0.3)';
                                break;
                            }
                        }
                    }

                    this.generateGuesses();
                }
            }
        }

        checkWordsElement() {
            const wordElems = Array.from(document.querySelectorAll('.words.show .word'));

            wordElems.forEach(elem => {
                const word = elem.textContent.trim().toLowerCase();

                if (!word || /[^a-zA-Z.\s-]/g.test(word)) {
                    return;
                }

                if (word.trim() !== "" && !this.correctAnswers.includes(word)) {
                    this.correctAnswers.push(word);
                    GM_setValue('correctAnswers', this.correctAnswers);
                }
            });
        }

        observeInput() {
            const inputElem = document.querySelector('#game-chat input[data-translate="placeholder"]');
            inputElem.addEventListener('input', this.generateGuesses.bind(this));
            inputElem.addEventListener('keydown', this.handleKeyDown.bind(this));

            const formElem = document.querySelector('#game-chat form');
            formElem.addEventListener('submit', this.generateGuesses.bind(this));
        }

        handleKeyDown(event) {
            if (event.key === 'Tab' && this.possibleWords.length > 0) {
                event.preventDefault();
                const inputElem = document.querySelector('#game-chat input[data-translate="placeholder"]');
                inputElem.value = this.possibleWords[0];
                inputElem.focus();
                this.generateGuesses();
            }
        }

        levenshteinDistance(a, b) {
            const matrix = [];

            for (let i = 0; i <= b.length; i++) {
                matrix[i] = [i];
            }

            for (let j = 0; j <= a.length; j++) {
                matrix[0][j] = j;
            }

            for (let i = 1; i <= b.length; i++) {
                for (let j = 1; j <= a.length; j++) {
                    if (b.charAt(i - 1) == a.charAt(j - 1)) {
                        matrix[i][j] = matrix[i - 1][j - 1];
                    } else {
                        matrix[i][j] = Math.min(matrix[i - 1][j - 1] + 1,
                            Math.min(matrix[i][j - 1] + 1,
                                matrix[i - 1][j] + 1));
                    }
                }
            }

            return matrix[b.length][a.length];
        }

        generateGuesses() {
            const hintElems = Array.from(document.querySelectorAll('.hints .hint'));
            const inputElem = document.querySelector('#game-chat input[data-translate="placeholder"]');
            const hintParts = hintElems.map(elem => elem.textContent === '_' ? '.' : elem.textContent).join('').split(' ');
            const inputText = inputElem.value ? String(inputElem.value) : '';

            this.tempWords = this.tempWords.filter(word => {
                if (this.alreadyGuessed.includes(word)) {
                    return false;
                }

                if (this.closeWord.length > 0 && this.levenshteinDistance(word, this.closeWord) > 1) {
                    return false;
                }

                let wordParts = word.split(' ');

                if (wordParts.length !== hintParts.length) {
                    return false;
                }

                for (let i = 0, len = wordParts.length; i < len; i++) {
                    if (wordParts[i].length !== hintParts[i].length) {
                        return false;
                    }
                }

                if (hintParts.join(' ').trim().length <= 0 && inputText.trim().length <= 0) {
                    return true;
                }

                let hintRegex = new RegExp(`^${hintParts.join(' ')}$`, 'i');
                if (!hintRegex.test(word)) {
                    return false;
                }

                return true;
            });

            this.possibleWords = this.tempWords.filter(word => {
                let inputTextRegex = new RegExp(`^${inputText}`, 'i');
                if (!inputTextRegex.test(word)) {
                    return false;
                }

                return true;
            });

            this.closeWord = '';
            this.guessElem.innerHTML = '';
            this.renderGuesses(this.possibleWords, inputElem);
        }

        renderGuesses(possibleWords, inputElem) {
            possibleWords.slice(0, 100).forEach((word, index) => {
                const wordElem = document.createElement('div');
                wordElem.textContent = word;
                wordElem.style = 'font-weight: bold; display: inline-block; padding: 5px; margin-right: 2px; color: white; text-shadow: 2px 2px 2px black;';
                const maxValue = possibleWords.length > 100 ? 100 : possibleWords.length;
                let hueValue = possibleWords.length > 1 ? Math.floor(360 * index / (maxValue - 1)) : 0;
                wordElem.style.backgroundColor = `hsl(${hueValue}, 100%, 50%)`;

                this.addHoverEffect(wordElem, hueValue);
                this.addClickFunctionality(wordElem, word, inputElem, hueValue);
                this.guessElem.appendChild(wordElem);
            });
        }

        addHoverEffect(wordElem, hueValue) {
            wordElem.addEventListener('mouseenter', function() {
                if (!this.classList.contains('pressed')) {
                    this.style.backgroundColor = 'lightgray';
                }
                this.classList.add('hovered');
            });

            wordElem.addEventListener('mouseleave', function() {
                if (!this.classList.contains('pressed')) {
                    this.style.backgroundColor = `hsl(${hueValue}, 100%, 50%)`;
                }
                this.classList.remove('hovered');
            });
        }


        addClickFunctionality(wordElem, word, inputElem, colorValue) {
            wordElem.addEventListener('mousedown', function() {
                wordElem.classList.add('pressed');
                wordElem.style.backgroundColor = 'gray';
            });

            wordElem.addEventListener('mouseup', function() {
                wordElem.classList.remove('pressed');
                if (!wordElem.classList.contains('hovered')) {
                    wordElem.style.backgroundColor = `rgb(${colorValue}, ${255 - colorValue}, 0)`;
                } else {
                    wordElem.style.backgroundColor = 'lightgray';
                }
            });

            wordElem.addEventListener('click', function() {
                const formElem = document.querySelector('#game-chat form');
                inputElem.value = word;
                formElem.dispatchEvent(new Event('submit', {
                    bubbles: true,
                    cancelable: true
                }));
            });
        }
    }

    new WordSleuth();
})();