// /public/js/gameplay.js (Откаченная версия, совместимая с последним GameInstance.js)

export function initGameplay(dependencies) {
    const { socket, clientState, ui } = dependencies;
    const { returnToMenuButton } = ui.elements;

    const attackButton = document.getElementById('button-attack');
    const abilitiesGrid = document.getElementById('abilities-grid');

    // --- Вспомогательные функции ---
    function enableGameControls(enableAttack = true, enableAbilities = true) {
        if (attackButton) attackButton.disabled = !enableAttack;
        if (abilitiesGrid) {
            const config = window.GAME_CONFIG || {};
            const cls = config.CSS_CLASS_ABILITY_BUTTON || 'ability-button';
            abilitiesGrid.querySelectorAll(`.${cls}`).forEach(b => { b.disabled = !enableAbilities; });
        }
        if (window.gameUI?.updateUI) {
            requestAnimationFrame(() => window.gameUI.updateUI());
        }
    }

    function disableGameControls() {
        enableGameControls(false, false);
    }

    function initializeAbilityButtons() {
        if (!abilitiesGrid || !window.gameUI || !window.GAME_CONFIG) {
            if (abilitiesGrid) abilitiesGrid.innerHTML = '<p class="placeholder-text">Ошибка загрузки способностей.</p>';
            return;
        }
        abilitiesGrid.innerHTML = '';
        const config = window.GAME_CONFIG;
        const abilitiesToDisplay = clientState.playerAbilitiesServer;
        const baseStatsForResource = clientState.playerBaseStatsServer;

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

        const resourceName = baseStatsForResource.resourceName || "Ресурс";
        const abilityButtonClass = config.CSS_CLASS_ABILITY_BUTTON || 'ability-button';

        abilitiesToDisplay.forEach(ability => {
            const button = document.createElement('button');
            button.id = `ability-btn-${ability.id}`;
            button.classList.add(abilityButtonClass);
            button.dataset.abilityId = ability.id;
            let cooldown = ability.cooldown;
            let cooldownText = (typeof cooldown === 'number' && cooldown > 0) ? ` (КД: ${cooldown} х.)` : "";
            let title = `${ability.name} (${ability.cost} ${resourceName})${cooldownText} - ${ability.description || 'Нет описания'}`;
            button.setAttribute('title', title);
            const nameSpan = document.createElement('span'); nameSpan.classList.add('ability-name'); nameSpan.textContent = ability.name; button.appendChild(nameSpan);
            const descSpan = document.createElement('span'); descSpan.classList.add('ability-desc'); descSpan.textContent = `(${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);
            abilitiesGrid.appendChild(button);
        });
        const placeholder = abilitiesGrid.querySelector('.placeholder-text');
        if (placeholder) placeholder.remove();
    }

    function handleAbilityButtonClick(event) {
        const abilityId = event.currentTarget.dataset.abilityId;
        if (clientState.isLoggedIn &&
            clientState.isInGame &&
            clientState.currentGameId &&
            abilityId &&
            clientState.currentGameState &&
            !clientState.currentGameState.isGameOver) {
            socket.emit('playerAction', { actionType: 'ability', abilityId: abilityId });
            disableGameControls();
        } else {
            console.warn("Cannot perform ability action, invalid state");
        }
    }

    // --- Обработчики событий DOM ---
    if (attackButton) {
        attackButton.addEventListener('click', () => {
            if (clientState.isLoggedIn &&
                clientState.isInGame &&
                clientState.currentGameId &&
                clientState.currentGameState &&
                !clientState.currentGameState.isGameOver) {
                socket.emit('playerAction', { actionType: 'attack' });
                disableGameControls();
            } else {
                console.warn("Cannot perform attack action, invalid state.");
            }
        });
    }

    if (returnToMenuButton) {
        returnToMenuButton.addEventListener('click', () => {
            if (!clientState.isLoggedIn) {
                ui.showAuthScreen();
                return;
            }
            returnToMenuButton.disabled = true;
            clientState.isInGame = false;
            disableGameControls();
            ui.showGameSelectionScreen(clientState.loggedInUsername);
        });
    }


    // --- ОБЩИЙ ОБРАБОТЧИК ДЛЯ ЗАПУСКА/ВОССТАНОВЛЕНИЯ ИГРЫ ---
    function handleGameDataReceived(data, eventName = "unknown") {
        if (!clientState.isLoggedIn) return;
        const username = clientState.loggedInUsername || 'N/A'; // Для логов
        console.log(`[CLIENT ${username}] ${eventName} received.`);
        // if (data.log) console.log(`[CLIENT ${username}] ${eventName} log content:`, JSON.parse(JSON.stringify(data.log)));


        clientState.currentGameId = data.gameId;
        clientState.myPlayerId = data.yourPlayerId;
        clientState.currentGameState = data.initialGameState || data.gameState;
        clientState.playerBaseStatsServer = data.playerBaseStats;
        clientState.opponentBaseStatsServer = data.opponentBaseStats;
        clientState.playerAbilitiesServer = data.playerAbilities;
        clientState.opponentAbilitiesServer = data.opponentAbilities;
        clientState.myCharacterKey = data.playerBaseStats?.characterKey;
        clientState.opponentCharacterKey = data.opponentBaseStats?.characterKey;

        if (clientState.currentGameState && !clientState.currentGameState.isGameOver) {
            clientState.isInGame = true;
        } else if (clientState.currentGameState && clientState.currentGameState.isGameOver) {
            clientState.isInGame = false;
        }

        if (data.clientConfig) {
            window.GAME_CONFIG = { ...window.GAME_CONFIG, ...data.clientConfig };
        } else if (!window.GAME_CONFIG) {
            window.GAME_CONFIG = { PLAYER_ID: 'player', OPPONENT_ID: 'opponent', CSS_CLASS_HIDDEN: 'hidden' };
        }
        ui.updateGlobalWindowVariablesForUI();

        const gameWrapperElement = document.querySelector('.game-wrapper');
        if (clientState.isInGame && clientState.currentGameState && !clientState.currentGameState.isGameOver) {
            const isGameWrapperVisible = gameWrapperElement && (gameWrapperElement.style.display === 'flex' || getComputedStyle(gameWrapperElement).display === 'flex');
            if (!isGameWrapperVisible) {
                ui.showGameScreen();
            }
        }

        initializeAbilityButtons();

        if (window.gameUI?.uiElements?.log?.list) {
            // console.log(`[CLIENT ${username}] Log BEFORE clear in ${eventName}:`, window.gameUI.uiElements.log.list.innerHTML.substring(0,100));
            window.gameUI.uiElements.log.list.innerHTML = ''; // Очищаем UI-лог перед добавлением новых
            // console.log(`[CLIENT ${username}] Log AFTER clear in ${eventName}:`, window.gameUI.uiElements.log.list.innerHTML);
        }
        if (window.gameUI?.addToLog && data.log) {
            data.log.forEach(logEntry => {
                // console.log(`[CLIENT ${username}] Adding to UI log from ${eventName}: "${logEntry.message}"`);
                window.gameUI.addToLog(logEntry.message, logEntry.type);
            });
        }

        requestAnimationFrame(() => {
            if (window.gameUI?.updateUI) {
                window.gameUI.updateUI();
            }
            if (clientState.isInGame && clientState.currentGameState && !clientState.currentGameState.isGameOver && window.GAME_CONFIG) {
                const config = window.GAME_CONFIG;
                const isMyActualTurn = clientState.myPlayerId &&
                    ((clientState.currentGameState.isPlayerTurn && clientState.myPlayerId === config.PLAYER_ID) ||
                        (!clientState.currentGameState.isPlayerTurn && clientState.myPlayerId === config.OPPONENT_ID));
                if (isMyActualTurn) {
                    enableGameControls();
                } else {
                    disableGameControls();
                }
            }
        });

        // Управление gameStatusMessage
        if (clientState.currentGameState && clientState.currentGameState.isGameOver) {
            // gameOver имеет свой обработчик статуса (внутри socket.on('gameOver',...))
        } else if (eventName === 'gameStarted' || eventName === 'gameState (reconnect)') {
            // Это начало игры или восстановление сессии, статус должен быть чистым
            console.log(`[CLIENT ${username}] ${eventName} - Clearing game status message because it's a fresh game/state load.`);
            ui.setGameStatusMessage("");
        } else {
            // Для gameStateUpdate и других событий, не являющихся полной перезагрузкой,
            // gameStatusMessage будет управляться в их обработчиках или через turnTimerUpdate.
            // Если игра продолжается и не gameOver, общее сообщение "Ожидание" должно сниматься.
            if (clientState.isInGame) {
                ui.setGameStatusMessage("");
            }
        }
        // Если игра пришла завершенной, то showGameOver должен быть вызван.
        if (clientState.currentGameState && clientState.currentGameState.isGameOver) {
            if (window.gameUI?.showGameOver && !document.getElementById('game-over-screen').classList.contains('hidden')) {
                // Экран уже показан
            } else if (window.gameUI?.showGameOver) {
                let playerWon = false;
                if (data.winnerId) {
                    playerWon = data.winnerId === clientState.myPlayerId;
                } else if (clientState.currentGameState.player && clientState.currentGameState.opponent) {
                    if (clientState.currentGameState.player.currentHp > 0 && clientState.currentGameState.opponent.currentHp <=0) {
                        playerWon = clientState.myPlayerId === clientState.currentGameState.player.id;
                    } else if (clientState.currentGameState.opponent.currentHp > 0 && clientState.currentGameState.player.currentHp <=0) {
                        playerWon = clientState.myPlayerId === clientState.currentGameState.opponent.id;
                    }
                }
                window.gameUI.showGameOver(playerWon, data.reason || "Игра завершена", clientState.opponentCharacterKey, { finalGameState: clientState.currentGameState, ...data });
            }
            if (returnToMenuButton) returnToMenuButton.disabled = false;
        }
    }


    // --- Обработчики событий Socket.IO ---
    socket.on('gameStarted', (data) => {
        handleGameDataReceived(data, 'gameStarted');
    });

    socket.on('gameState', (data) => {
        handleGameDataReceived(data, 'gameState (reconnect)');
    });

    socket.on('gameStateUpdate', (data) => {
        if (!clientState.isLoggedIn || !clientState.isInGame || !clientState.currentGameId || !window.GAME_CONFIG) return;
        const username = clientState.loggedInUsername || 'N/A';
        console.log(`[CLIENT ${username}] Event: gameStateUpdate.`);

        clientState.currentGameState = data.gameState;
        ui.updateGlobalWindowVariablesForUI();

        if (window.gameUI?.updateUI) {
            requestAnimationFrame(() => {
                window.gameUI.updateUI();
                if (clientState.isInGame && clientState.currentGameState && !clientState.currentGameState.isGameOver && window.GAME_CONFIG) {
                    const config = window.GAME_CONFIG;
                    const isMyActualTurn = clientState.myPlayerId &&
                        ((clientState.currentGameState.isPlayerTurn && clientState.myPlayerId === config.PLAYER_ID) ||
                            (!clientState.currentGameState.isPlayerTurn && clientState.myPlayerId === config.OPPONENT_ID));

                    if (isMyActualTurn) {
                        enableGameControls();
                    } else {
                        disableGameControls();
                    }

                    console.log(`[CLIENT ${username}] gameStateUpdate - Clearing game status message as game is active.`);
                    ui.setGameStatusMessage("");

                } else if (clientState.currentGameState && clientState.currentGameState.isGameOver) {
                    disableGameControls();
                }
            });
        }

        if (window.gameUI?.addToLog && data.log) {
            data.log.forEach(log => window.gameUI.addToLog(log.message, log.type));
        }
    });

    socket.on('logUpdate', (data) => {
        if (!clientState.isLoggedIn || !clientState.isInGame || !clientState.currentGameId || !window.GAME_CONFIG) return;
        const username = clientState.loggedInUsername || 'N/A';
        // console.log(`[CLIENT ${username}] Event: logUpdate. Logs:`, data.log);
        if (window.gameUI?.addToLog && data.log) {
            data.log.forEach(log => window.gameUI.addToLog(log.message, log.type));
        }
    });

    socket.on('gameOver', (data) => {
        if (!clientState.isLoggedIn || !clientState.currentGameId || !window.GAME_CONFIG) {
            if (!clientState.currentGameId && clientState.isLoggedIn) socket.emit('requestGameState');
            else if (!clientState.isLoggedIn) ui.showAuthScreen();
            return;
        }
        const username = clientState.loggedInUsername || 'N/A';
        console.log(`[CLIENT ${username}] Event: gameOver.`);

        const playerWon = data.winnerId === clientState.myPlayerId;
        clientState.currentGameState = data.finalGameState;
        clientState.isInGame = false;

        ui.updateGlobalWindowVariablesForUI();

        if (window.gameUI?.updateUI) requestAnimationFrame(() => window.gameUI.updateUI());
        if (window.gameUI?.addToLog && data.log) {
            data.log.forEach(log => window.gameUI.addToLog(log.message, log.type));
        }
        if (window.gameUI?.showGameOver) {
            const oppKey = clientState.opponentBaseStatsServer?.characterKey;
            window.gameUI.showGameOver(playerWon, data.reason, oppKey, data);
        }
        if (returnToMenuButton) returnToMenuButton.disabled = false;
        // `ui.setGameStatusMessage` будет установлено специфичным сообщением о результате игры
        // ui.setGameStatusMessage("Игра окончена. " + (playerWon ? "Вы победили!" : "Вы проиграли."));
        if (window.gameUI?.updateTurnTimerDisplay) {
            window.gameUI.updateTurnTimerDisplay(null, false, clientState.currentGameState?.gameMode);
        }
        disableGameControls();
    });

    socket.on('opponentDisconnected', (data) => {
        if (!clientState.isLoggedIn || !clientState.isInGame || !clientState.currentGameId || !window.GAME_CONFIG) return;
        const username = clientState.loggedInUsername || 'N/A';
        console.log(`[CLIENT ${username}] Event: opponentDisconnected.`);
        const name = data.disconnectedCharacterName || clientState.opponentBaseStatsServer?.name || 'Противник';

        // Сообщение об отключении оппонента должно приходить через 'logUpdate' от сервера
        // if (window.gameUI?.addToLog) {
        //    window.gameUI.addToLog(`🔌 Противник (${name}) отключился.`, 'system');
        // }

        if (clientState.currentGameState && !clientState.currentGameState.isGameOver) {
            ui.setGameStatusMessage(`Противник (${name}) отключился. Ожидание...`, true);
            disableGameControls();
        }
    });

    socket.on('turnTimerUpdate', (data) => {
        if (!clientState.isInGame || !clientState.currentGameState || !window.GAME_CONFIG) {
            if (window.gameUI?.updateTurnTimerDisplay && clientState.currentGameState && !clientState.currentGameState.isGameOver) {
                window.gameUI.updateTurnTimerDisplay(null, false, clientState.currentGameState.gameMode);
            }
            return;
        }

        if (clientState.currentGameState.isGameOver) {
            if (window.gameUI?.updateTurnTimerDisplay) {
                window.gameUI.updateTurnTimerDisplay(null, false, clientState.currentGameState.gameMode);
            }
            disableGameControls();
            return;
        }

        const username = clientState.loggedInUsername || 'N/A';
        // console.log(`[CLIENT ${username}] Event: turnTimerUpdate.`);

        if (window.gameUI && typeof window.gameUI.updateTurnTimerDisplay === 'function') {
            const config = window.GAME_CONFIG;
            const isMyActualTurn = clientState.myPlayerId && clientState.currentGameState &&
                ((clientState.currentGameState.isPlayerTurn && clientState.myPlayerId === config.PLAYER_ID) ||
                    (!clientState.currentGameState.isPlayerTurn && clientState.myPlayerId === config.OPPONENT_ID));

            window.gameUI.updateTurnTimerDisplay(data.remainingTime, isMyActualTurn, clientState.currentGameState.gameMode);

            if (isMyActualTurn) {
                enableGameControls();
            } else {
                disableGameControls();
            }

            if (!clientState.currentGameState.isGameOver) {
                console.log(`[CLIENT ${username}] turnTimerUpdate - Clearing game status message as timer is active.`);
                ui.setGameStatusMessage("");
            }
        }
    });

    // Начальная деактивация
    disableGameControls();
}