// /public/js/client.js

document.addEventListener('DOMContentLoaded', () => {
    const socket = io({
    });

    let currentGameState = null;
    let myPlayerId = null;
    let currentGameId = null;
    let playerBaseStatsServer = null;
    let opponentBaseStatsServer = null;
    let playerAbilitiesServer = null;
    let opponentAbilitiesServer = null;

    const attackButton = document.getElementById('button-attack');
    const abilitiesGrid = document.getElementById('abilities-grid');
    const gameSetupDiv = document.getElementById('game-setup');
    const createAIGameButton = document.getElementById('create-ai-game');
    const createPvPGameButton = document.getElementById('create-pvp-game');
    const joinPvPGameButton = document.getElementById('join-pvp-game');
    const findRandomPvPGameButton = document.getElementById('find-random-pvp-game');
    const gameIdInput = document.getElementById('game-id-input');
    const availableGamesDiv = document.getElementById('available-games-list');
    const gameStatusMessage = document.getElementById('game-status-message');
    const gameWrapper = document.querySelector('.game-wrapper');
    const restartGameButton = document.getElementById('restart-game-button');
    const gameOverScreen = document.getElementById('game-over-screen');

    function hideGameOverModal() {
        const hiddenClass = (window.GAME_CONFIG && window.GAME_CONFIG.CSS_CLASS_HIDDEN) ? window.GAME_CONFIG.CSS_CLASS_HIDDEN : 'hidden';
        if (gameOverScreen && !gameOverScreen.classList.contains(hiddenClass)) {
            gameOverScreen.classList.add(hiddenClass);
            if (gameUI && gameUI.uiElements && gameUI.uiElements.gameOver && gameUI.uiElements.gameOver.modalContent) {
                gameUI.uiElements.gameOver.modalContent.style.transform = 'scale(0.8) translateY(30px)';
                gameUI.uiElements.gameOver.modalContent.style.opacity = '0';
            }
        }
    }

    function showGameSetupScreen() {
        hideGameOverModal();
        if (gameWrapper) gameWrapper.style.display = 'none';
        if (gameSetupDiv) gameSetupDiv.style.display = 'block';
        setGameStatusMessage("Выберите режим игры или присоединитесь к существующей.");
        updateAvailableGamesList([]);
        if (gameIdInput) gameIdInput.value = '';
    }

    function showGameScreen() {
        hideGameOverModal();
        if (gameSetupDiv) gameSetupDiv.style.display = 'none';
        if (gameWrapper) gameWrapper.style.display = 'flex';
        setGameStatusMessage("");
    }

    function setGameStatusMessage(message, isError = false) {
        if (gameStatusMessage) {
            gameStatusMessage.textContent = message;
            gameStatusMessage.style.display = message ? 'block' : 'none';
            gameStatusMessage.style.color = isError ? 'var(--damage-color, red)' : 'var(--turn-color, yellow)';
        }
    }

    function initializeAbilityButtons() {
        if (!gameUI || !gameUI.uiElements || !gameUI.uiElements.controls.abilitiesGrid || !window.GAME_CONFIG) {
            console.error("Cannot initialize abilities UI: missing gameUI elements or GAME_CONFIG.");
            return;
        }
        const grid = gameUI.uiElements.controls.abilitiesGrid;
        grid.innerHTML = '';
        const config = window.GAME_CONFIG;

        const abilitiesToDisplay = (myPlayerId === config.PLAYER_ID) ? playerAbilitiesServer : opponentAbilitiesServer;
        const baseStatsForResource = (myPlayerId === config.PLAYER_ID) ? playerBaseStatsServer : opponentBaseStatsServer;
        const resourceName = baseStatsForResource ? baseStatsForResource.resourceName : "Ресурс";

        if (!abilitiesToDisplay || abilitiesToDisplay.length === 0) {
            grid.innerHTML = '<p class="placeholder-text">Нет доступных способностей.</p>';
            return;
        }

        abilitiesToDisplay.forEach(ability => {
            const button = document.createElement('button');
            button.id = `ability-btn-${ability.id}`;
            button.classList.add(config.CSS_CLASS_ABILITY_BUTTON || 'ability-button');
            button.dataset.abilityId = ability.id;

            let descriptionText = ability.description;
            if (typeof ability.descriptionFunction === 'function') {
                const targetStatsForDesc = (myPlayerId === config.PLAYER_ID) ? opponentBaseStatsServer : playerBaseStatsServer;
                descriptionText = ability.descriptionFunction(config, targetStatsForDesc);
            }

            let title = `${ability.name} (${ability.cost} ${resourceName}) - ${descriptionText}`;
            let cooldown = ability.cooldown;
            if (myPlayerId === config.OPPONENT_ID) {
                if (ability.internalCooldownFromConfig && config[ability.internalCooldownFromConfig]) {
                    cooldown = config[ability.internalCooldownFromConfig];
                } else if (ability.internalCooldownValue) {
                    cooldown = ability.internalCooldownValue;
                }
            }
            if (cooldown) title += ` (КД: ${cooldown} х.)`;
            button.setAttribute('title', title);

            const nameSpan = document.createElement('span');
            nameSpan.classList.add('ability-name');
            nameSpan.textContent = ability.name;
            button.appendChild(nameSpan);

            const descSpan = document.createElement('span');
            descSpan.classList.add('ability-desc');
            descSpan.textContent = `(${ability.cost} ${resourceName})`;
            button.appendChild(descSpan);

            const cdDisplay = document.createElement('span');
            cdDisplay.classList.add('ability-cooldown-display');
            cdDisplay.style.display = 'none';
            button.appendChild(cdDisplay);

            button.addEventListener('click', handleAbilityButtonClick);
            grid.appendChild(button);
        });
    }

    function updateAvailableGamesList(games) {
        if (!availableGamesDiv) return;
        availableGamesDiv.innerHTML = '<h3>Доступные PvP игры:</h3>';
        if (games && games.length > 0) {
            const ul = document.createElement('ul');
            games.forEach(game => {
                if (game) {
                    const li = document.createElement('li');
                    li.textContent = `ID: ${game.id.substring(0, 8)}... - ${game.status || 'Ожидает игрока'}`;
                    const joinBtn = document.createElement('button');
                    joinBtn.textContent = 'Присоединиться';
                    joinBtn.dataset.gameId = game.id;
                    joinBtn.addEventListener('click', (e) => {
                        const idToJoin = e.target.dataset.gameId;
                        socket.emit('joinGame', { gameId: idToJoin });
                    });
                    li.appendChild(joinBtn);
                    ul.appendChild(li);
                }
            });
            availableGamesDiv.appendChild(ul);
        } else {
            availableGamesDiv.innerHTML += '<p>Нет доступных игр. Создайте свою!</p>';
        }
    }

    if (attackButton) {
        attackButton.addEventListener('click', () => {
            if (currentGameId && currentGameState && !currentGameState.isGameOver) {
                socket.emit('playerAction', { actionType: 'attack' });
            }
        });
    }

    function handleAbilityButtonClick(event) {
        const button = event.currentTarget;
        const abilityId = button.dataset.abilityId;
        if (currentGameId && abilityId && currentGameState && !currentGameState.isGameOver) {
            socket.emit('playerAction', {
                actionType: 'ability',
                abilityId: abilityId
            });
        }
    }

    if (restartGameButton) {
        restartGameButton.addEventListener('click', () => {
            console.log("[Client] Restart button clicked. currentGameId:", currentGameId, "currentGameState:", currentGameState);
            if (currentGameId && currentGameState && currentGameState.isGameOver) {
                console.log("[Client] Sending 'requestRestart' for game ID:", currentGameId);
                socket.emit('requestRestart', { gameId: currentGameId });
                setGameStatusMessage("Запрос на рестарт отправлен...");
                restartGameButton.disabled = true;
            } else {
                console.warn("[Client] Cannot request restart. Conditions not met:",
                    { currentGameId, currentGameStateExists: !!currentGameState, isGameOver: currentGameState?.isGameOver }
                );
                if (!currentGameId) {
                    alert("Ошибка: ID текущей игры не определен. Невозможно запросить рестарт.");
                    showGameSetupScreen();
                }
            }
        });
    }

    if (createAIGameButton) {
        createAIGameButton.addEventListener('click', () => {
            socket.emit('createGame', { mode: 'ai' });
            setGameStatusMessage("Создание игры против AI...");
        });
    }
    if (createPvPGameButton) {
        createPvPGameButton.addEventListener('click', () => {
            socket.emit('createGame', { mode: 'pvp' });
            setGameStatusMessage("Создание PvP игры...");
        });
    }
    if (joinPvPGameButton && gameIdInput) {
        joinPvPGameButton.addEventListener('click', () => {
            const gameIdToJoin = gameIdInput.value.trim();
            if (gameIdToJoin) {
                console.log("[Client] Attempting to join game with ID:", gameIdToJoin);
                socket.emit('joinGame', { gameId: gameIdToJoin });
                setGameStatusMessage(`Присоединение к игре ${gameIdToJoin}...`);
            } else {
                setGameStatusMessage("Пожалуйста, введите ID игры для присоединения.", true);
            }
        });
    }
    if (findRandomPvPGameButton) {
        findRandomPvPGameButton.addEventListener('click', () => {
            socket.emit('findRandomPvPGame');
            setGameStatusMessage("Поиск случайной PvP игры...");
        });
    }

    socket.on('connect', () => {
        console.log('Успешно подключено к серверу. ID сокета:', socket.id);
        showGameSetupScreen();
        socket.emit('requestAvailablePvPGames');
    });

    socket.on('disconnect', (reason) => {
        console.log('Отключено от сервера:', reason);
        setGameStatusMessage(`Отключено от сервера: ${reason}. Попробуйте обновить страницу.`, true);

        currentGameState = null;
        currentGameId = null;
        myPlayerId = null;

        hideGameOverModal();
        showGameSetupScreen();
    });

    socket.on('gameCreated', (data) => {
        currentGameId = data.gameId;
        myPlayerId = data.yourPlayerId;
        console.log(`Игра создана/присоединена: ${currentGameId}, Режим: ${data.mode}, Вы играете за: ${myPlayerId}`);

        if (data.clientConfig) {
            window.GAME_CONFIG = { ...(window.GAME_CONFIG || {}), ...data.clientConfig };
        }

        const playerConfigId = (window.GAME_CONFIG && window.GAME_CONFIG.PLAYER_ID) ? window.GAME_CONFIG.PLAYER_ID : 'player';
        if (data.mode === 'pvp') {
            if (gameIdInput) gameIdInput.value = currentGameId;
            if (myPlayerId === playerConfigId) {
                setGameStatusMessage(`PvP игра создана. ID для друга: ${currentGameId}. Ожидание второго игрока...`);
            } else {
                setGameStatusMessage(`Присоединились к PvP игре. Ожидание начала...`);
            }
        } else {
            setGameStatusMessage(`Игра против AI создана. Ожидание начала...`);
        }
    });

    socket.on('gameStarted', (data) => {
        console.log('Событие "gameStarted" получено:', data);
        currentGameId = data.gameId;
        myPlayerId = data.yourPlayerId;
        currentGameState = data.initialGameState;
        playerBaseStatsServer = data.playerBaseStats;
        opponentBaseStatsServer = data.opponentBaseStats;
        playerAbilitiesServer = data.playerAbilities;
        opponentAbilitiesServer = data.opponentAbilities;

        if (data.clientConfig) {
            window.GAME_CONFIG = { ...data.clientConfig };
        } else if (!window.GAME_CONFIG) {
            console.warn("Server did not send clientConfig in 'gameStarted'. UI might rely on defaults or fail.");
            window.GAME_CONFIG = { PLAYER_ID: 'player', OPPONENT_ID: 'opponent', CSS_CLASS_HIDDEN: 'hidden' };
        }

        window.gameState = currentGameState;
        window.gameData = {
            playerBaseStats: playerBaseStatsServer,
            opponentBaseStats: opponentBaseStatsServer,
            playerAbilities: playerAbilitiesServer,
            opponentAbilities: opponentAbilitiesServer
        };
        window.myPlayerId = myPlayerId;

        showGameScreen();
        initializeAbilityButtons();

        if (gameUI && gameUI.uiElements && gameUI.uiElements.log && gameUI.uiElements.log.list) {
            gameUI.uiElements.log.list.innerHTML = '';
        }
        if (gameUI && typeof gameUI.addToLog === 'function' && data.log) {
            data.log.forEach(logEntry => gameUI.addToLog(logEntry.message, logEntry.type));
        }

        if (gameUI && typeof gameUI.updateUI === 'function') {
            gameUI.updateUI();
        }

        hideGameOverModal();
        if (restartGameButton) {
            restartGameButton.disabled = true;
            restartGameButton.dataset.gameIdForRestart = '';
        }
        setGameStatusMessage("");
    });

    socket.on('gameStateUpdate', (data) => {
        currentGameState = data.gameState;
        window.gameState = currentGameState;

        if (gameUI && typeof gameUI.updateUI === 'function') {
            gameUI.updateUI();
        }
        if (gameUI && typeof gameUI.addToLog === 'function' && data.log) {
            data.log.forEach(logEntry => gameUI.addToLog(logEntry.message, logEntry.type));
        }
    });

    socket.on('logUpdate', (data) => {
        if (gameUI && typeof gameUI.addToLog === 'function' && data.log) {
            data.log.forEach(logEntry => gameUI.addToLog(logEntry.message, logEntry.type));
        }
    });

    socket.on('gameOver', (data) => {
        console.log('Игра окончена:', data);
        currentGameState = data.finalGameState;
        window.gameState = currentGameState;

        if (gameUI && typeof gameUI.updateUI === 'function') {
            gameUI.updateUI();
        }
        if (gameUI && typeof gameUI.addToLog === 'function' && data.log) {
            data.log.forEach(logEntry => gameUI.addToLog(logEntry.message, logEntry.type));
        }
        if (gameUI && typeof gameUI.showGameOver === 'function') {
            const playerWon = data.winnerId === myPlayerId;
            gameUI.showGameOver(playerWon, data.reason);
            if (restartGameButton) {
                restartGameButton.disabled = false;
                restartGameButton.dataset.gameIdForRestart = currentGameId;
            }
        }
        setGameStatusMessage("Игра окончена. " + (data.winnerId === myPlayerId ? "Вы победили!" : "Вы проиграли."));
    });

    socket.on('waitingForOpponent', () => {
        setGameStatusMessage("Ожидание присоединения оппонента...");
    });

    socket.on('opponentDisconnected', (data) => {
        const systemLogType = (window.GAME_CONFIG && window.GAME_CONFIG.LOG_TYPE_SYSTEM) ? window.GAME_CONFIG.LOG_TYPE_SYSTEM : 'system';
        if (gameUI && typeof gameUI.addToLog === 'function') {
            gameUI.addToLog("Противник отключился.", systemLogType);
        }
        if (!currentGameState || !currentGameState.isGameOver) {
            setGameStatusMessage("Противник отключился. Игра прервана. Вы можете начать новую.", true);
        }
    });

    socket.on('turnNotification', (data) => {
    });

    socket.on('waitingForRestartVote', (data) => {
        const systemLogType = (window.GAME_CONFIG && window.GAME_CONFIG.LOG_TYPE_SYSTEM) ? window.GAME_CONFIG.LOG_TYPE_SYSTEM : 'system';
        if (gameUI && typeof gameUI.addToLog === 'function') {
            gameUI.addToLog(
                `${data.voterCharacterName || 'Игрок'} (${data.voterRole}) проголосовал(а) за рестарт. Нужно еще ${data.votesNeeded} голосов.`,
                systemLogType
            );
        }
        setGameStatusMessage(`Один из игроков (${data.voterCharacterName}) проголосовал за рестарт. Ожидание вашего решения или решения другого игрока.`);
        if (restartGameButton && currentGameState && currentGameState.isGameOver) {
            restartGameButton.disabled = false;
        }
    });

    socket.on('gameError', (data) => {
        console.error('Ошибка от сервера:', data.message);
        const systemLogType = (window.GAME_CONFIG && window.GAME_CONFIG.LOG_TYPE_SYSTEM) ? window.GAME_CONFIG.LOG_TYPE_SYSTEM : 'system';
        if (gameUI && typeof gameUI.addToLog === 'function') {
            gameUI.addToLog(`Ошибка: ${data.message}`, systemLogType);
        }
        setGameStatusMessage(`Ошибка: ${data.message}`, true);
    });

    socket.on('availablePvPGamesList', (games) => {
        updateAvailableGamesList(games);
    });

    socket.on('noPendingGamesFound', (data) => {
        setGameStatusMessage(data.message || "Свободных игр не найдено. Создана новая для вас, ожидайте оппонента.");
        updateAvailableGamesList([]);
    });

    showGameSetupScreen();
});