750 lines
25 KiB
JavaScript
750 lines
25 KiB
JavaScript
// FILE: internal/webserver/web/app.js
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// Game state management
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let gameState = {
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gameId: null,
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fen: null,
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turn: 'w',
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isPlayerWhite: true,
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isLocked: false,
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pollInterval: null,
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apiUrl: '',
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selectedSquare: null,
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healthCheckInterval: null,
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networkError: false,
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moveList: [],
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};
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// Chess piece Unicode: all black pieces for better fill, white pawn due to inability to override emoji variant display
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const pieceMap = {
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'p': '♙', 'r': '♜', 'n': '♞', 'b': '♝', 'q': '♛', 'k': '♚',
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'P': '♙', 'R': '♜', 'N': '♞', 'B': '♝', 'Q': '♛', 'K': '♚'
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};
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// Initialize on page load
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document.addEventListener('DOMContentLoaded', async () => {
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const config = await getConfig();
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gameState.apiUrl = config.apiUrl;
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document.getElementById('new-game-btn').addEventListener('click', showNewGameModal);
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document.getElementById('undo-btn').addEventListener('click', undoMoves);
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document.getElementById('start-game-btn').addEventListener('click', startNewGame);
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document.getElementById('cancel-btn').addEventListener('click', hideNewGameModal);
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document.getElementById('copy-history').addEventListener('click', copyHistory);
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const levelSlider = document.getElementById('computer-level');
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const levelValue = document.getElementById('level-value');
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levelSlider.addEventListener('input', () => { levelValue.textContent = levelSlider.value; });
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const timeSlider = document.getElementById('search-time');
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const timeValue = document.getElementById('time-value');
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timeSlider.addEventListener('input', () => { timeValue.textContent = timeSlider.value; });
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startHealthCheck();
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// Don't auto-show modal on load
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});
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async function getConfig() {
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try {
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const response = await fetch('/config');
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return await response.json();
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} catch (error) {
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console.error('Failed to get config:', error);
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return { apiUrl: 'http://localhost:8080' };
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}
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}
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function startHealthCheck() {
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const checkHealth = async () => {
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try {
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const response = await fetch(`${gameState.apiUrl}/health`);
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if (response.ok) {
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const health = await response.json();
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updateServerIndicator(health.status === 'healthy' ? 'healthy' : 'degraded');
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updateStorageIndicator(health.storage || 'unknown');
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gameState.networkError = false;
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} else {
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handleApiError('health check', null, response);
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updateStorageIndicator('unknown');
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}
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} catch (error) {
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handleApiError('health check', error);
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updateStorageIndicator('unknown');
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}
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};
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checkHealth();
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gameState.healthCheckInterval = setInterval(checkHealth, 10000);
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}
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function updateServerIndicator(status, message = null) {
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const indicator = document.getElementById('server-indicator');
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const light = indicator.querySelector('.light');
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light.setAttribute('data-status', status);
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// Set custom tooltip if message provided
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if (message) {
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indicator.setAttribute('data-status', message);
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} else {
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// Default messages
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const defaultMessages = {
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'healthy': 'healthy',
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'degraded': 'degraded',
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'unknown': 'unknown'
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};
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indicator.setAttribute('data-status', defaultMessages[status] || status);
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}
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}
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function updateStorageIndicator(status) {
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const indicator = document.getElementById('storage-indicator');
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const light = indicator.querySelector('.light');
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light.setAttribute('data-status', status);
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indicator.setAttribute('data-status', status);
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}
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function updateTurnIndicator(state, turn) {
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const indicator = document.getElementById('turn-indicator');
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const light = indicator.querySelector('.light');
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let status = '';
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let tooltipText = '';
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if (state === 'pending' || gameState.isLocked) {
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status = 'thinking';
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tooltipText = 'Computer Thinking';
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} else if (state && isGameOver(state)) {
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switch(state) {
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case 'white wins':
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status = 'white-wins';
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tooltipText = 'White Wins';
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break;
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case 'black wins':
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status = 'black-wins';
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tooltipText = 'Black Wins';
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break;
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case 'stalemate':
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status = 'stalemate';
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tooltipText = 'Stalemate';
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break;
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case 'draw':
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status = 'draw';
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tooltipText = 'Draw';
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break;
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default:
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status = 'unknown';
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tooltipText = 'Game Over';
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}
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} else if (turn === 'w') {
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status = 'white';
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tooltipText = 'White';
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} else if (turn === 'b') {
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status = 'black';
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tooltipText = 'Black';
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} else {
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status = 'unknown';
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tooltipText = 'Unknown';
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}
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light.setAttribute('data-status', status);
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indicator.setAttribute('data-status', tooltipText);
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}
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function showNewGameModal() {
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const modal = document.getElementById('modal-overlay');
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modal.classList.add('show');
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setupModalKeyboardNav();
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}
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function hideNewGameModal() {
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const modal = document.getElementById('modal-overlay');
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modal.classList.remove('show');
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teardownModalKeyboardNav();
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}
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function setupModalKeyboardNav() {
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document.addEventListener('keydown', handleModalKeydown);
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}
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function teardownModalKeyboardNav() {
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document.removeEventListener('keydown', handleModalKeydown);
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}
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function handleModalKeydown(e) {
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const modal = document.getElementById('modal-overlay');
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if (!modal.classList.contains('show')) return;
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switch(e.key) {
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case 'Enter':
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e.preventDefault();
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startNewGame();
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break;
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case 'Escape':
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e.preventDefault();
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hideNewGameModal();
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break;
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case 'w':
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case 'W':
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e.preventDefault();
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document.querySelector('input[name="player-color"][value="white"]').checked = true;
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break;
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case 'b':
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case 'B':
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e.preventDefault();
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document.querySelector('input[name="player-color"][value="black"]').checked = true;
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break;
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case 'l':
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case 'L':
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e.preventDefault();
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document.getElementById('computer-level').focus();
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break;
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case 's':
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case 'S':
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e.preventDefault();
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document.getElementById('search-time').focus();
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break;
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case 'ArrowLeft':
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handleSliderNav(e, -1);
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break;
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case 'ArrowRight':
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handleSliderNav(e, 1);
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break;
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}
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}
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function handleSliderNav(e, direction) {
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const activeEl = document.activeElement;
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if (activeEl.id === 'computer-level') {
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e.preventDefault();
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activeEl.value = Math.max(0, Math.min(20, parseInt(activeEl.value) + direction));
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activeEl.dispatchEvent(new Event('input'));
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} else if (activeEl.id === 'search-time') {
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e.preventDefault();
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activeEl.value = Math.max(100, Math.min(10000, parseInt(activeEl.value) + direction * 100));
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activeEl.dispatchEvent(new Event('input'));
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}
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}
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function copyHistory() {
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const moves = gameState.moveList;
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let pgn = '';
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for (let i = 0; i < moves.length; i++) {
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if (i % 2 === 0) {
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pgn += `${Math.floor(i / 2) + 1}. `;
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}
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pgn += moves[i] + ' ';
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}
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if (gameState.fen) {
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pgn += `\n\n[FEN "${gameState.fen}"]`;
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}
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navigator.clipboard.writeText(pgn.trim()).then(() => {
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const btn = document.getElementById('copy-history');
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btn.classList.add('copied');
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setTimeout(() => {
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btn.classList.remove('copied');
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}, 2000);
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});
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}
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async function startNewGame() {
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const playerColor = document.querySelector('input[name="player-color"]:checked').value;
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const computerLevel = parseInt(document.getElementById('computer-level').value);
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const searchTime = parseInt(document.getElementById('search-time').value);
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const startingFEN = document.getElementById('starting-fen').value.trim();
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gameState.isPlayerWhite = (playerColor === 'white');
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const whiteConfig = gameState.isPlayerWhite ? { type: 1 } : { type: 2, level: computerLevel, searchTime: searchTime };
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const blackConfig = gameState.isPlayerWhite ? { type: 2, level: computerLevel, searchTime: searchTime } : { type: 1 };
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const requestBody = {
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white: whiteConfig,
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black: blackConfig
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};
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const defaultFEN = 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1';
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if (startingFEN && startingFEN !== defaultFEN) {
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requestBody.fen = startingFEN;
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}
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try {
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const response = await fetch(`${gameState.apiUrl}/api/v1/games`, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify(requestBody)
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});
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if (!response.ok) throw new Error('Failed to create game');
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if (!response.ok) {
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const errorInfo = handleApiError('create game', null, response);
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throw new Error(errorInfo.statusMessage);
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}
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const game = await response.json();
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gameState.gameId = game.gameId;
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gameState.moveList = [];
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hideNewGameModal();
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initializeBoard();
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updateGameDisplay(game);
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document.getElementById('undo-btn').disabled = true;
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if (!gameState.isPlayerWhite) triggerComputerMove();
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} catch (error) {
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if (error.message === 'Failed to fetch') {
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handleApiError('create game', error);
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} else {
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flashErrorMessage(error.message);
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}
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updateTurnIndicator('', '');
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}
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}
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function initializeBoard() {
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const boardEl = document.getElementById('board');
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boardEl.innerHTML = '';
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const isBlackPov = !gameState.isPlayerWhite;
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// Update coordinate labels based on perspective
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const topCoords = document.querySelector('.coordinates.top');
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const leftCoords = document.querySelector('.coordinates.left');
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if (isBlackPov) {
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topCoords.innerHTML = '<span>h</span><span>g</span><span>f</span><span>e</span><span>d</span><span>c</span><span>b</span><span>a</span>';
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leftCoords.innerHTML = '<span>1</span><span>2</span><span>3</span><span>4</span><span>5</span><span>6</span><span>7</span><span>8</span>';
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} else {
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topCoords.innerHTML = '<span>a</span><span>b</span><span>c</span><span>d</span><span>e</span><span>f</span><span>g</span><span>h</span>';
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leftCoords.innerHTML = '<span>8</span><span>7</span><span>6</span><span>5</span><span>4</span><span>3</span><span>2</span><span>1</span>';
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}
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for (let i = 0; i < 64; i++) {
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const square = document.createElement('div');
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const rank = 7 - Math.floor(i / 8);
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const file = i % 8;
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const squareName = `${String.fromCharCode(97 + file)}${rank + 1}`;
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const displayRank = isBlackPov ? 7 - rank : rank;
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const displayFile = isBlackPov ? 7 - file : file;
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square.className = `square ${(displayRank + displayFile) % 2 === 0 ? 'dark' : 'light'}`;
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square.dataset.square = squareName;
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square.addEventListener('click', handleSquareClick);
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boardEl.appendChild(square);
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}
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}
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function renderBoardFromFEN(fen) {
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const fenBoard = fen.split(' ')[0];
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// Clear board and remove checkmate indicators
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document.querySelectorAll('.square').forEach(s => {
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s.textContent = '';
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s.classList.remove('white-piece', 'black-piece', 'mated-king');
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delete s.dataset.pieceColor;
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});
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let rank = 7, file = 0;
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for (const char of fenBoard) {
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if (char === '/') {
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rank--; file = 0;
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} else if (/\d/.test(char)) {
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file += parseInt(char, 10);
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} else {
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const squareName = `${String.fromCharCode(97 + file)}${rank + 1}`;
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const squareEl = document.querySelector(`[data-square="${squareName}"]`);
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if (squareEl) {
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const pieceColor = (char === char.toUpperCase()) ? 'w' : 'b';
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squareEl.textContent = pieceMap[char === 'P' ? 'P' : char.toLowerCase()] || '';
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squareEl.classList.add(pieceColor === 'w' ? 'white-piece' : 'black-piece');
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squareEl.dataset.pieceColor = pieceColor;
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squareEl.dataset.pieceType = char.toLowerCase();
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}
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file++;
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}
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}
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}
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function handleSquareClick(e) {
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if (gameState.isLocked) return;
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// Block moves after game over
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if (isGameOver(gameState.state)) return;
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const squareEl = e.currentTarget;
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const { square, pieceColor } = squareEl.dataset;
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const playerTurnColor = gameState.isPlayerWhite ? 'w' : 'b';
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if (gameState.turn !== playerTurnColor) return;
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if (gameState.selectedSquare) {
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const from = gameState.selectedSquare;
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const fromEl = document.querySelector(`[data-square="${from}"]`);
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fromEl.classList.remove('selected');
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gameState.selectedSquare = null;
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if (from !== square) {
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handleHumanMove(from, square);
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}
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} else if (pieceColor === playerTurnColor) {
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gameState.selectedSquare = square;
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squareEl.classList.add('selected');
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} else {
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flashErrorMessage('Invalid Piece Selection');
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// Flash red for invalid piece selection
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flashSquare(squareEl, false);
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}
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}
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function flashSquare(element, success = true) {
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const className = success ? 'flash-green' : 'flash-red';
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element.classList.add(className);
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setTimeout(() => element.classList.remove(className), 400);
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}
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async function handleHumanMove(from, to) {
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const move = from + to;
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const fromEl = document.querySelector(`[data-square="${from}"]`);
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const toEl = document.querySelector(`[data-square="${to}"]`);
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try {
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const response = await fetch(`${gameState.apiUrl}/api/v1/games/${gameState.gameId}/moves`, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ move })
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});
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const game = await response.json();
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if (!response.ok) {
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// Handle client errors differently - these aren't network issues
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if (response.status === 400) {
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// Invalid move - flash message and squares
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// Handled early, not shown as server error, and bypasses handleApiError
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flashErrorMessage('Invalid Move');
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flashSquare(fromEl, false);
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flashSquare(toEl, false);
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renderBoardFromFEN(gameState.fen);
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return;
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}
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// Other errors use error handler
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handleApiError('move', null, response);
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return;
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}
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flashSquare(fromEl, true);
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flashSquare(toEl, true);
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updateGameDisplay(game);
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if (!isGameOver(game.state)) {
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triggerComputerMove();
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}
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} catch (error) {
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handleApiError('move', error);
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}
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}
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async function triggerComputerMove() {
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lockBoard();
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try {
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const response = await fetch(`${gameState.apiUrl}/api/v1/games/${gameState.gameId}/moves`, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ move: 'cccc' })
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});
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if (!response.ok) {
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handleApiError('trigger computer move', null, response);
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unlockBoard();
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return;
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}
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gameState.networkError = false;
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startPolling();
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} catch (error) {
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handleApiError('trigger computer move', error);
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unlockBoard();
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}
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}
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function startPolling() {
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gameState.pollInterval = setInterval(async () => {
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try {
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const response = await fetch(`${gameState.apiUrl}/api/v1/games/${gameState.gameId}`);
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if (!response.ok) {
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// Use error handler but continue polling for 404 (game might be deleted)
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const errorInfo = handleApiError('poll game state', null, response);
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if (response.status === 404) {
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stopPolling();
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unlockBoard();
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flashErrorMessage('Game no longer exists');
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gameState.gameId = null;
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return;
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}
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// For other errors, display but keep polling
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handleApiError('poll game state', null, response);
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return;
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}
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const game = await response.json();
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if (game.state !== 'pending') {
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stopPolling();
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updateGameDisplay(game);
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unlockBoard();
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}
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gameState.networkError = false;
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updateServerIndicator('healthy');
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} catch (error) {
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handleApiError('poll game state', error);
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stopPolling();
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unlockBoard();
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}
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}, 1500);
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}
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function stopPolling() {
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clearInterval(gameState.pollInterval);
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gameState.pollInterval = null;
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}
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function lockBoard() {
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gameState.isLocked = true;
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updateTurnIndicator('pending', gameState.turn);
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}
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function unlockBoard() {
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gameState.isLocked = false;
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updateTurnIndicator('', gameState.turn);
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}
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async function undoMoves() {
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if (gameState.isLocked) return;
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if (!gameState.moveList || gameState.moveList.length < 2) {
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console.log('No moves to undo');
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return;
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}
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try {
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const response = await fetch(`${gameState.apiUrl}/api/v1/games/${gameState.gameId}/undo`, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ count: 2 })
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});
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if (!response.ok) {
|
|
const errorInfo = handleApiError('undo', null, response);
|
|
// For client errors like "no moves to undo", don't throw
|
|
if (errorInfo.isClientError) {
|
|
console.log('Undo failed:', errorInfo.statusMessage);
|
|
return;
|
|
}
|
|
throw new Error(errorInfo.statusMessage);
|
|
}
|
|
|
|
const game = await response.json();
|
|
gameState.state = game.state;
|
|
updateGameDisplay(game);
|
|
} catch (error) {
|
|
if (error.message === 'Failed to fetch') {
|
|
handleApiError('undo', error);
|
|
}
|
|
}
|
|
}
|
|
|
|
function renderMoveHistory(moves) {
|
|
const grid = document.getElementById('move-grid');
|
|
grid.innerHTML = '';
|
|
|
|
let startsWithBlack = false;
|
|
if (gameState.fen) {
|
|
const fenParts = gameState.fen.split(' ');
|
|
const moveNum = parseInt(fenParts[5]) || 1;
|
|
const activeColor = fenParts[1];
|
|
startsWithBlack = (moveNum === 1 && activeColor === 'b' && moves.length === 0);
|
|
}
|
|
|
|
for (let i = 0; i < moves.length; i++) {
|
|
const isWhiteMove = (i % 2 === 0);
|
|
const moveNumber = Math.floor(i / 2) + 1;
|
|
|
|
if (i === 0 || i % 2 === 0) {
|
|
const numEl = document.createElement('div');
|
|
numEl.className = 'move-number';
|
|
numEl.textContent = moveNumber + '.';
|
|
grid.appendChild(numEl);
|
|
|
|
const whiteEl = document.createElement('div');
|
|
if (isWhiteMove && !startsWithBlack) {
|
|
whiteEl.className = 'move-white';
|
|
whiteEl.textContent = moves[i];
|
|
} else if (!isWhiteMove && startsWithBlack) {
|
|
whiteEl.className = 'move-empty';
|
|
whiteEl.textContent = '...';
|
|
} else {
|
|
whiteEl.className = 'move-empty';
|
|
whiteEl.textContent = '';
|
|
}
|
|
grid.appendChild(whiteEl);
|
|
|
|
const blackEl = document.createElement('div');
|
|
if (i + 1 < moves.length && !startsWithBlack) {
|
|
blackEl.className = 'move-black';
|
|
blackEl.textContent = moves[i + 1];
|
|
i++;
|
|
} else if (isWhiteMove && startsWithBlack) {
|
|
blackEl.className = 'move-black';
|
|
blackEl.textContent = moves[i];
|
|
} else {
|
|
blackEl.className = 'move-empty';
|
|
blackEl.textContent = '';
|
|
}
|
|
grid.appendChild(blackEl);
|
|
}
|
|
}
|
|
|
|
const historyContainer = document.getElementById('move-history');
|
|
historyContainer.scrollTop = historyContainer.scrollHeight;
|
|
}
|
|
|
|
function updateGameDisplay(game) {
|
|
gameState.fen = game.fen;
|
|
gameState.turn = game.turn;
|
|
gameState.state = game.state;
|
|
gameState.moveList = game.moves || [];
|
|
|
|
renderBoardFromFEN(game.fen);
|
|
updateTurnIndicator(game.state, game.turn);
|
|
|
|
// Clear previous checkmate indicators
|
|
document.querySelectorAll('.mated-king').forEach(el => {
|
|
el.classList.remove('mated-king');
|
|
});
|
|
|
|
// Highlight last move
|
|
document.querySelectorAll('.last-move-from, .last-move-to').forEach(el => {
|
|
el.classList.remove('last-move-from', 'last-move-to');
|
|
});
|
|
|
|
if (game.lastMove && game.lastMove.move) {
|
|
const from = game.lastMove.move.substring(0, 2);
|
|
const to = game.lastMove.move.substring(2, 4);
|
|
const fromEl = document.querySelector(`[data-square="${from}"]`);
|
|
const toEl = document.querySelector(`[data-square="${to}"]`);
|
|
if (fromEl) fromEl.classList.add('last-move-from');
|
|
if (toEl) toEl.classList.add('last-move-to');
|
|
}
|
|
|
|
// Update move history
|
|
renderMoveHistory(game.moves || []);
|
|
|
|
// Update undo button
|
|
document.getElementById('undo-btn').disabled = !game.moves || game.moves.length < 2;
|
|
|
|
// Handle checkmate visually
|
|
if (game.state === 'white wins' || game.state === 'black wins') {
|
|
markMatedKing(game);
|
|
}
|
|
}
|
|
|
|
function markMatedKing(game) {
|
|
// Find and mark the mated king
|
|
const matedColor = game.state === 'white wins' ? 'b' : 'w';
|
|
document.querySelectorAll('.square').forEach(square => {
|
|
if (square.dataset.pieceType === 'k' && square.dataset.pieceColor === matedColor) {
|
|
square.classList.add('mated-king');
|
|
}
|
|
});
|
|
}
|
|
|
|
function isGameOver(state) {
|
|
return ['white wins', 'black wins', 'stalemate', 'draw'].includes(state);
|
|
}
|
|
|
|
function handleApiError(action, error, response = null) {
|
|
let serverStatus = 'degraded';
|
|
let statusMessage = 'Server Error';
|
|
let isNetworkError = !response;
|
|
|
|
if (isNetworkError) {
|
|
// Network/connection error
|
|
statusMessage = 'Connection Failed';
|
|
console.error(`Network error during ${action}:`, error);
|
|
} else if (response) {
|
|
const status = response.status;
|
|
|
|
// Map status codes to user-friendly messages
|
|
switch (status) {
|
|
case 400:
|
|
// Bad request - not a server issue, game logic error
|
|
serverStatus = 'healthy'; // Server is fine, request was invalid
|
|
if (action === 'undo') {
|
|
statusMessage = 'No Moves to Undo';
|
|
} else if (action === 'move') {
|
|
statusMessage = 'Invalid Move';
|
|
} else {
|
|
statusMessage = 'Invalid Request';
|
|
}
|
|
break;
|
|
case 404:
|
|
serverStatus = 'healthy'; // Server is fine, game doesn't exist
|
|
statusMessage = 'Game Not Found';
|
|
break;
|
|
case 429:
|
|
serverStatus = 'degraded';
|
|
statusMessage = 'Rate Limited';
|
|
break;
|
|
case 415:
|
|
serverStatus = 'healthy';
|
|
statusMessage = 'Invalid Content Type';
|
|
break;
|
|
case 500:
|
|
case 502:
|
|
case 503:
|
|
serverStatus = 'degraded';
|
|
statusMessage = status === 503 ? 'Service Unavailable' : 'Server Error';
|
|
break;
|
|
default:
|
|
if (status >= 500) {
|
|
serverStatus = 'degraded';
|
|
statusMessage = `Server Error (${status})`;
|
|
} else if (status >= 400) {
|
|
serverStatus = 'healthy';
|
|
statusMessage = `Request Failed (${status})`;
|
|
}
|
|
}
|
|
|
|
console.error(`API error during ${action}: ${status} - ${statusMessage}`);
|
|
}
|
|
|
|
flashErrorMessage(statusMessage);
|
|
|
|
// Update indicators based on error type
|
|
if (isNetworkError || (response && response.status >= 500)) {
|
|
updateServerIndicator(serverStatus, statusMessage);
|
|
gameState.networkError = true;
|
|
} else {
|
|
// For client errors (4xx), server is healthy but request failed
|
|
updateServerIndicator('healthy');
|
|
gameState.networkError = false;
|
|
}
|
|
|
|
return {
|
|
serverStatus,
|
|
statusMessage,
|
|
isNetworkError,
|
|
isClientError: response && response.status >= 400 && response.status < 500,
|
|
isServerError: response && response.status >= 500
|
|
};
|
|
}
|
|
|
|
function flashErrorMessage(message) {
|
|
const overlay = document.getElementById('error-flash-overlay');
|
|
const messageEl = document.getElementById('error-flash-message');
|
|
|
|
// Set message text
|
|
messageEl.textContent = message;
|
|
|
|
// Show overlay
|
|
overlay.classList.add('show');
|
|
|
|
// Auto-hide after animation completes
|
|
setTimeout(() => {
|
|
overlay.classList.remove('show');
|
|
}, 500);
|
|
} |