package it.polimi.ingsw.gc14.Model;

import it.polimi.ingsw.gc14.Model.Cards.Building.EffectType;
import it.polimi.ingsw.gc14.Model.Cards.BuildingCard;
import it.polimi.ingsw.gc14.Model.Cards.TribeCard;
import it.polimi.ingsw.gc14.Model.Cards.TribeCards.Character;
import it.polimi.ingsw.gc14.Model.Cards.TribeCards.CharacterType;
import it.polimi.ingsw.gc14.Model.Cards.TribeCards.Characters.Builder;
import it.polimi.ingsw.gc14.Model.Cards.TribeCards.Characters.Inventor;
import it.polimi.ingsw.gc14.Model.Cards.TribeCards.EventCard;
import it.polimi.ingsw.gc14.Model.Cards.TribeCards.EventType;
import it.polimi.ingsw.gc14.Model.GamePackage.Board;
import it.polimi.ingsw.gc14.Model.GamePackage.CurrentState;
import it.polimi.ingsw.gc14.Model.Orders.Order2;
import it.polimi.ingsw.gc14.Model.Orders.Order3;
import it.polimi.ingsw.gc14.Model.Orders.Order4;
import it.polimi.ingsw.gc14.Model.Orders.Order5;
import it.polimi.ingsw.gc14.Model.GamePackage.GameStages;

import java.io.Serializable;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;

/**
 * Represents the main game model.
 * A Game object stores the players, the current state of the match,
 * the slot assignments, the board, and the logic required to manage the game flow.
 */
public class Game implements Serializable {

    /**
     * The final ranking of players at the end of the game.
     */
    private ArrayList<Player> playerStanding;

    /**
     * Returns the final ranking of players.
     *
     * @return the list of players ordered according to their final standing.
     */
    public ArrayList<Player> getPlayerStanding() {
        return playerStanding;
    }

    /**
     * Returns the list of players participating in the game.
     *
     * @return a copy of the list of players currently participating in the game.
     */
    public List<Player> getPlayers() {
        return playersList;
    }

    /**
     * Returns the list of totems that have not yet been assigned to any player.
     *
     * @return the list of currently available totems.
     */
    public List<Totems>getAvailableTotems() {
        List<Totems> totems=new ArrayList<>(List.of(Totems.values()));
        playersList.forEach(player -> {if(player.getTotem()!=null)totems.remove(player.getTotem());});
        return totems;
    }

    /**
     * Queue containing the players who still have to choose their totem.
     */
    private final Queue<Player> totemChoiceQueue = new LinkedList<>();

    /**
     * Assigns the selected totem to the specified player during the totem choice phase.
     *
     * <p>The choice is accepted only if the game is currently in the
     * {@link GameStages#TOTEM_CHOICE} stage, the player is the current one,
     * and the selected totem is still available.
     *
     * <p>After a valid choice, the method advances to the next player in the queue.
     * If all players have completed the selection, the game moves to the slot choice phase.
     * Disconnected players are automatically assigned a random available totem.
     *
     * @param player the player making the totem choice.
     * @param totem  the selected totem.
     * @return {@code true} if the choice is applied successfully, {@code false} otherwise.
     */
    public synchronized boolean totemChoice(Player player,Totems totem) {
        if(currentState.getGameStage() != GameStages.TOTEM_CHOICE)
            return false;
        if(!getCurrentState().getCurrentPlayer().equals(player))
            return false;
        if(!getAvailableTotems().contains(totem))
        {
            return false;
        }
        player.setTotem(totem);
        Player nextPlayer= totemChoiceQueue.poll();

        if(nextPlayer==null)
        {
            currentState.gameStageUpdate(GameStages.SLOT_CHOICE);
            currentState.playerUpdate(orderLogicCard.pull(),null);
        }
        else
        {
            while(disconnectedPlayers.containsKey(nextPlayer)&& disconnectedPlayers.get(nextPlayer))
            {
                nextPlayer.setTotem(getAvailableTotems().get(new Random().nextInt(0,getAvailableTotems().size())));
                nextPlayer=totemChoiceQueue.poll();
                if(nextPlayer==null)
                {
                    currentState.gameStageUpdate(GameStages.SLOT_CHOICE);
                    nextPlayerSetup();
                    return true;
                }
            }
            currentState.playerUpdate(nextPlayer,null);
        }
        return true;
    }

    /**
     * Map tracking the players who are currently disconnected.
     * Key: player; value: {@code true} if currently disconnected, {@code false} if reconnected.
     */
    private final Map<Player,Boolean> disconnectedPlayers = new HashMap<>();

    /**
     * Returns an unmodifiable view of the disconnected-players map.
     *
     * @return map from player to disconnection status.
     */
    public Map<Player,Boolean> getDisconnectedPlayers() {
        return Collections.unmodifiableMap(disconnectedPlayers);
    }

    /**
     * Marks the specified player as disconnected and updates the game flow accordingly.
     *
     * <p>If the player disconnects during the waiting phase, they are removed from
     * the player list and from the totem choice queue. If the disconnected player is
     * the current one, the game advances to the next suitable player or, during the
     * totem choice phase, handles the remaining selection flow automatically.
     *
     * @param player the player who disconnected.
     * @return {@code true} if the disconnection is handled successfully,
     *         {@code false} if the player was already marked as disconnected.
     */
    public synchronized boolean disconnectedPlayer(Player player)
    {
        if(disconnectedPlayers.containsKey(player) && disconnectedPlayers.get(player))
        {
            return false;
        }
        disconnectedPlayers.put(player,true);
        if (currentState.getGameStage() == GameStages.WAITING) {
            playersList.remove(player);
            totemChoiceQueue.remove(player);
            return true;
        }
        if(currentState.getCurrentPlayer().equals(player)) {
            if (currentState.getGameStage() != GameStages.TOTEM_CHOICE) {
                nextPlayerSetup();
            }
            else {
                totemChoiceQueue.removeIf(x->x.getUserName().equals(player.getUserName()));
                player.setTotem(getAvailableTotems().get(new Random().nextInt(getAvailableTotems().size())));
                if (totemChoiceQueue.isEmpty()) {
                    player.setTotem(getAvailableTotems().get(new Random().nextInt(getAvailableTotems().size())));
                    currentState.gameStageUpdate(GameStages.SLOT_CHOICE);
                    nextPlayerSetup();
                    return true;
                }
                currentState.playerUpdate(totemChoiceQueue.poll(), null);
            }
            return true;
        }

        return true;
    }

    /**
     * Marks the specified player as reconnected.
     *
     * <p>If the player reconnects during the slot choice phase, they are removed
     * from the disconnected players map and reinserted into the order logic card
     * when necessary.
     *
     * @param player the player who reconnected.
     * @return {@code true} if the reconnection is handled successfully,
     *         {@code false} if the player was not previously marked as disconnected.
     */
    public synchronized boolean reconnectPlayer(Player player)
    {
        if(!disconnectedPlayers.containsKey(player))
        {
            return false;
        }
        disconnectedPlayers.put(player,false);
        if(currentState.getGameStage() == GameStages.SLOT_CHOICE)
        {
            disconnectedPlayers.remove(player);
            if(!orderLogicCard.containsInQueue(player))
            {
                orderLogicCard.pushNoEffect(player);
            }
        }
        else if(currentState.getGameStage() == GameStages.RES_ACTIONS) {
            if(slotMap.containsValue(player))
            {
                disconnectedPlayers.remove(player);
            }
        }
        else if(currentState.getGameStage() == GameStages.TOTEM_CHOICE)
        {
            totemChoiceQueue.removeIf(x->x.getUserName().equals(player.getUserName()));
            totemChoiceQueue.add(player);
        }
        return true;
    }

    /**
     * Clears the collection of disconnected players.
     */
    public synchronized void clearDisconnected()
    {
        disconnectedPlayers.clear();
    }

    /**
     * Returns the current number of players participating in the game.
     * @return the current number of players.
     */
    public int getCurrentPlayerNumber() {
        return playersList.size();
    }

    /**
     * The list of players participating in the game.
     */
    private ArrayList<Player> playersList;

    /**
     * The current state of the game.
     */
    private CurrentState currentState;

    /**
     * The mapping between slots and the players assigned to them.
     */
    private HashMap<Slot,Player> slotMap;

    /**
     * Returns the map of slots assigned to players.
     *
     * @return the map that associates each slot with the corresponding player.
     */
    public HashMap<Slot,Player> getSlotMap() {return slotMap;}

    /**
     * The configured number of players for this game.
     */
    private int nPlayers;

    /**
     * The queue of players involved in optional card resolution.
     */
    private Queue<Player> optionalCardQueue;

    /**
     * The order logic card associated with this game.
     */
    private OrderLogicCard orderLogicCard;

    /**
     * Returns the order logic card associated with this game.
     *
     * @return the order logic card.
     */
    public OrderLogicCard getOrderLogicCard() { return orderLogicCard; }

    /**
     * The board associated with this game.
     */
    private Board board;

    /**
     * Returns the game board.
     *
     * @return the board associated with the game.
     */
    public Board getBoard() {return board;}

    /**
     * Returns a copy of the upper tribe cards currently available on the board.
     *
     * @return a new list containing the upper tribe cards currently on the board.
     */
    public ArrayList<TribeCard> getUpperListTribeCards() {
        return new ArrayList<>(board.getUpperListTribe());
    }

    /**
     * Returns a copy of the lower tribe cards currently available on the board.
     *
     * @return a new list containing the lower tribe cards currently on the board.
     */
    public ArrayList<TribeCard> getLowerListTribeCards() {
        return new ArrayList<>(board.getLowerListTribe());
    }

    /**
     * Returns a copy of the upper building cards currently available on the board.
     *
     * @return a new list containing the upper building cards currently on the board.
     */
    public ArrayList<BuildingCard> getUpperListBuilding() {
        return new ArrayList<>(board.getUpperListBuilding());
    }

    /**
     * Returns a copy of the lower building cards currently available on the board.
     *
     * @return a new list containing the lower building cards currently on the board.
     */
    public ArrayList<BuildingCard> getLowerListBuilding() {
        return new ArrayList<>(board.getLowerListBuilding());
    }

    /**
     * Returns the current state of the game.
     *
     * @return the current state of the game.
     */
    public CurrentState getCurrentState() {
        return currentState;
    }

    /**
     * Returns the player with the specified username, if present.
     *
     * @param username the username of the player to search for.
     * @return the player with the specified username, or {@code null} if no such player exists.
     * @throws IndexOutOfBoundsException if an index access error occurs.
     */
    public Player getPlayerByUsername(String username) throws IndexOutOfBoundsException {
        return playersList.stream().filter(x->x.getUserName().equals(username)).findFirst().orElse(null);
    }

    /**
     * Returns the configured number of players for this game.
     *
     * @return the configured number of players for this game.
     */
    public int getNPlayers() {
        return nPlayers;
    }

    /**
     * Creates a game with the specified number of players.
     *
     * @param nPlayers the configured number of players for the game.
     * @throws IllegalArgumentException if {@code nPlayers < 0} or {@code nPlayers > 5}.
     */
    public Game(int nPlayers) throws IllegalArgumentException{
        if(nPlayers !=0 && (nPlayers < 2 || nPlayers > 5)) {
            throw new IllegalArgumentException();
        }
        this.nPlayers = nPlayers;
        board=new Board(nPlayers);
        slotMap = new LinkedHashMap<>();
        for(Slot s :board.getSlotList())
        {
            slotMap.put(s,null);
        }
        currentState= new CurrentState();
        playersList = new ArrayList<>();
        optionalCardQueue = new LinkedList<>();
    }

    /**
     * Creates a game with 0 configured players.
     */
    public Game()
    {
        this(0);
    }

    /**
     * Attempts to add the specified player to the game.
     * The operation succeeds only if the configured number of players is not 0,
     * the current game stage is {@code WAITING}, and the player is not already present.
     * If the number of players reaches the configured maximum, the game is initialized.
     *
     * @param player the player to add to the game.
     * @return {@code true} if the player is successfully added, {@code false} otherwise.
     */
    public boolean addPlayer(Player player) {
        if(this.nPlayers==0)
        {
            return  false;
        }
        if(currentState.getGameStage()!= GameStages.WAITING)
            return false;
        if(getPlayerByUsername(player.getUserName())!=null)
            return false;
        playersList.add(player);
        totemChoiceQueue.add(player);
        if(playersList.size()>=nPlayers)
        {
            init();
        }
        return true;
    }

    /**
     * Initializes the game after all required players have been added.
     * The method creates the appropriate order logic card according to the number of players,
     * selects the first current player, and updates the game stage to {@code SLOT_CHOICE}.
     */
    public void init() {

        switch (nPlayers) {
            case 2:
                orderLogicCard=new Order2(playersList);
                break;
            case 3:
                orderLogicCard=new Order3(playersList);
                break;
            case 4:
                orderLogicCard=new Order4(playersList);
                break;
            case 5:
                orderLogicCard=new Order5(playersList);
                break;
            default:
                throw new IllegalStateException("nPlayers must be 2–5, got: " + nPlayers);
        }
        for(Player player : playersList)
        {
            switch(orderLogicCard.getPosition(player.getUserName()))
            {
                case 0: player.addFood(2); break;
                case 1,2: player.addFood(3); break;
                case 3,4: player.addFood(4); break;
            }

        }
        currentState.playerUpdate(totemChoiceQueue.poll(),null);
        currentState.gameStageUpdate(GameStages.TOTEM_CHOICE);
    }

    //region Controller Methods

    /**
     * Attempts to assign the slot at the specified index to the specified player.
     * The operation succeeds only if the index is valid, the current game stage is {@code SLOT_CHOICE},
     * the specified player is the current player, and the selected slot is not already assigned.
     * If the slot is successfully assigned, the next player setup is triggered.
     *
     * @param player the player performing the slot choice.
     * @param slotIndex the index of the selected slot.
     * @return {@code true} if the slot choice succeeds, {@code false} otherwise.
     */
    public boolean slotChoiceByIndex(Player player, int slotIndex) {
        if(slotIndex<0 || slotIndex>=slotMap.size())
            return  false;
        if(currentState.getGameStage()!= GameStages.SLOT_CHOICE)
        {
            return false;
        }
        if(!player.equals(currentState.getCurrentPlayer()))
        {
            return false;
        }
        Map.Entry<Slot, Player> slotPlayerEntry = new ArrayList<>(slotMap.entrySet()).get(slotIndex);
        if(slotPlayerEntry.getValue()!=null)
        {
            return false;
        }
        slotMap.put(slotPlayerEntry.getKey(),player);
        nextPlayerSetup();
        return true;

    }

    //region Drawing Methods

    /**
     * Attempts to draw the upper tribe card at the specified index for the specified player.
     * The operation succeeds only if the index is valid, the game stage is {@code RESOLVING_ACTIONS},
     * the specified player is the current player, at least one upper card draw is still available,
     * and the selected tribe card is not an event card.
     * If successful, the card is inserted into the player's collection, removed from the board,
     * and the number of remaining upper draws is decremented.
     * If both upper and lower draws become zero, the next player setup is triggered.
     *
     * @param player the player performing the draw.
     * @param cardIndex the index of the upper tribe card to draw.
     * @return {@code true} if the draw succeeds, {@code false} otherwise.
     */
    public boolean drawUpperTribeCardByIndex(Player player,int cardIndex) {
        if( cardIndex<0 || cardIndex >=board.getUpperListTribe().size())
            return false;
        if(currentState.getGameStage()!= GameStages.RES_ACTIONS && currentState.getGameStage()!=GameStages.OPT_CARD_E)
        {
            return false;
        }
        if(!player.equals(currentState.getCurrentPlayer()))
        {
            return false;
        }
        if(currentState.getNUpper() <1 && currentState.getGameStage()==GameStages.RES_ACTIONS)
            return false;
        TribeCard tribeCard = board.getUpperListTribe().get(cardIndex);
        if(tribeCard.isEventCard())
            return false;

        Character tempCard = (Character) tribeCard;
        tempCard.insert(player);
        board.removeUpperTribeCard(tempCard);
        if(currentState.getGameStage()==GameStages.RES_ACTIONS)
        {
            currentState.upperDrawn();
            if((currentState.getNLower() ==0 ||( !hasDrawableDown() && getLowerListBuilding().isEmpty())) && ((currentState.getNUpper() ==0)||(!hasDrawableUp() && getUpperListBuilding().isEmpty())))
                nextPlayerSetup();
        }
        else
        {
            nextPlayerSetup();
        }

        return true;
    }


    /**
     * Skips the turn for the specified player when no drawable cards are available.
     * The operation succeeds only if the current game stage is {@code RESOLVING_ACTIONS},
     * the specified player is the current player,
     * and the player can't draw tribe card (i.e. all remaining lower tribe cards are event cards).
     * @param player the player skipping the turn .
     * @return {@code true} if the skip succeeds, {@code false} otherwise.
     */
    public boolean skipTurn(Player player) {
        if(currentState.getGameStage() != GameStages.RES_ACTIONS && currentState.getGameStage() != GameStages.OPT_CARD_E)
        {
            return false;
        }
        if(!player.equals(currentState.getCurrentPlayer()))
        {
            return false;
        }
        if(currentState.getGameStage()==GameStages.RES_ACTIONS)
        {
            if(hasDrawableDown() && currentState.getNLower()>0 )
                return false;
            if(hasDrawableUp() && currentState.getNUpper()>0)
                return false;
            while(currentState.getNLower()>0)
                currentState.lowerDrawn();
            while(currentState.getNUpper()>0)
                currentState.upperDrawn();
            nextPlayerSetup();
        }
        else {
            nextPlayerSetup();
        }
        return true;
    }

    /**
     * Attempts to draw the lower tribe card at the specified index for the specified player.
     * The operation succeeds only if the index is valid, the game stage is {@code RESOLVING_ACTIONS},
     * the specified player is the current player, at least one lower card draw is still available,
     * and the selected tribe card is not an event card.
     * If successful, the card is inserted into the player's collection, removed from the board,
     * and the number of remaining lower draws is decremented.
     * If both lower and upper draws become zero, the next player setup is triggered.
     *
     * @param player the player performing the draw.
     * @param cardIndex the index of the lower tribe card to draw.
     * @return {@code true} if the draw succeeds, {@code false} otherwise.
     */
    public boolean drawLowerTribeCardByIndex(Player player, int cardIndex) {
        if( cardIndex<0 || cardIndex >=board.getLowerListTribe().size())
            return false;
        if(currentState.getGameStage()!= GameStages.RES_ACTIONS)
        {
            return false;
        }
        if(!player.equals(currentState.getCurrentPlayer()))
        {
            return false;
        }


        if(currentState.getNLower() <1)
            return false;
        TribeCard tribeCard = board.getLowerListTribe().get(cardIndex);
        if(tribeCard.isEventCard())
            return false;

        Character tempCard = (Character) tribeCard;
        tempCard.insert(player);
        board.removeLowerTribeCard(tempCard);
        currentState.lowerDrawn();
        if((currentState.getNLower() ==0 ||( !hasDrawableDown() && getLowerListBuilding().isEmpty())) && ((currentState.getNUpper() ==0)||(!hasDrawableUp() && getUpperListBuilding().isEmpty())))
            nextPlayerSetup();
        return true;

    }

    /**
     * Attempts to draw the upper building card at the specified index for the specified player.
     * The operation succeeds only if the index is valid, the game stage is {@code RESOLVING_ACTIONS},
     * the specified player is the current player, at least one upper card draw is still available,
     * and the selected building card can be bought by the player.
     * If successful, the building card is removed from the board and the number of remaining upper draws is decremented.
     * If both upper and lower draws become zero, the next player setup is triggered.
     *
     * @param player the player performing the draw.
     * @param cardIndex the index of the upper building card to draw.
     * @return {@code true} if the draw succeeds, {@code false} otherwise.
     */
    public boolean drawUpperBuildingCardByIndex(Player player,int cardIndex) {
        if( cardIndex<0 || cardIndex >=board.getUpperListBuilding().size())
            return false;
        if(currentState.getGameStage()!= GameStages.RES_ACTIONS && currentState.getGameStage()!=GameStages.OPT_CARD_E)
        {
            return false;
        }
        if(!player.equals(currentState.getCurrentPlayer()))
        {
            return false;
        }
        BuildingCard buildingCard = board.getUpperListBuilding().get(cardIndex);
        if(currentState.getNUpper() <1 && currentState.getGameStage()==GameStages.RES_ACTIONS)
            return false;
        if(!buildingCard.buy(player))
        {
            return false;
        }
        board.removeUpperBuildingCard(buildingCard);
        if(currentState.getGameStage() == GameStages.RES_ACTIONS)
        {
            currentState.upperDrawn();
            if((currentState.getNLower() ==0 ||( !hasDrawableDown() && getLowerListBuilding().isEmpty())) && ((currentState.getNUpper() ==0)||(!hasDrawableUp() && getUpperListBuilding().isEmpty())))
                nextPlayerSetup();
        }
        else
        {
            nextPlayerSetup();
        }
        return true;
    }

    /**
     * Attempts to draw the lower building card at the specified index for the specified player.
     * The operation succeeds only if the index is valid, the game stage is {@code RESOLVING_ACTIONS},
     * the specified player is the current player, at least one lower card draw is still available,
     * and the selected building card can be bought by the player.
     * If successful, the building card is removed from the board and the number of remaining lower draws is decremented.
     * If both lower and upper draws become zero, the next player setup is triggered.
     *
     * @param player the player performing the draw.
     * @param cardIndex the index of the lower building card to draw.
     * @return {@code true} if the draw succeeds, {@code false} otherwise.
     */
    public boolean drawLowerBuildingCardByIndex(Player player,int cardIndex) {
        if( cardIndex<0 || cardIndex >=board.getLowerListBuilding().size())
            return false;
        if(currentState.getGameStage()!= GameStages.RES_ACTIONS)
        {
            return false;
        }

        if(!player.equals(currentState.getCurrentPlayer()))
        {
            return false;
        }
        BuildingCard buildingCard = board.getLowerListBuilding().get(cardIndex);
        if(currentState.getNLower() <1)
            return false;
        if(buildingCard.buy(player))
        {
            currentState.lowerDrawn();
            board.removeLowerBuildingCard(buildingCard);
        }
        else
            return false;
        if((currentState.getNLower() ==0 ||( !hasDrawableDown() && getLowerListBuilding().isEmpty())) && ((currentState.getNUpper() ==0)||(!hasDrawableUp() && getUpperListBuilding().isEmpty())))
            nextPlayerSetup();

        return true;

    }


    //region Optional Card Methods

    /**
     * Prepares the next player and updates the game state according to the current game stage.
     * If the current stage is {@code SLOT_CHOICE}, the next player is taken from the order logic card.
     * If no player is available, the game stage is updated to {@code RESOLVING_ACTIONS}
     * and the first assigned slot is selected.
     * If the current stage is {@code RESOLVING_ACTIONS}, the current player is pushed back
     * into the order logic card, the current slot is freed, and the next assigned slot is selected.
     * If no assigned slots remain, the game stage is updated to {@code OPTIONAL_CARD_EFFECT},
     * the optional card queue is built from players owning building cards with effect id equal to 12,
     * and the first player in that queue is selected.
     * If no player is available for optional card resolution, the game stage is updated to
     * {@code RESOLVING_EVENT}; then, if the round number is less than 10, the next round is prepared,
     * otherwise event resolution is performed, the game stage is updated to {@code ENDING},
     * and the game is ended.
     * If the current stage is {@code OPTIONAL_CARD_EFFECT}, the next player is taken from the optional card queue.
     * If no player is available, the game stage is updated to {@code RESOLVING_EVENT}.
     */
    private synchronized void nextPlayerSetup() {

        if (GameStages.SLOT_CHOICE == currentState.getGameStage()) {
            Player tempPlayer;
            while (true) {
                tempPlayer = orderLogicCard.pull();
                if (tempPlayer == null) break;
                if (!disconnectedPlayers.containsKey(tempPlayer) || !disconnectedPlayers.get(tempPlayer)) break;
            }
            if (tempPlayer != null) {
                currentState.playerUpdate(tempPlayer, null);
                return;
            }

            // All players have chosen a slot → switch to RES_ACTIONS
            currentState.gameStageUpdate(GameStages.RES_ACTIONS);

            boolean anyAssigned = false;
            for (Map.Entry<Slot,Player> entry : slotMap.entrySet()) {
                if (entry.getValue() != null) {
                    if(entry.getKey().getSlotId()=='A')
                    {
                        entry.getValue().addFood(3);
                        orderLogicCard.push(entry.getValue());
                        entry.setValue(null);
                        continue;
                    }
                    currentState.playerUpdate(entry.getValue(), entry.getKey());
                    boolean hasDrawableLower = currentState.getNLower() > 0
                            && (hasDrawableDown() || !getLowerListBuilding().isEmpty());
                    boolean hasDrawableUpper = currentState.getNUpper() > 0
                            && (hasDrawableUp() || !getUpperListBuilding().isEmpty());
                    if (!hasDrawableLower && !hasDrawableUpper) {
                        // This player has nothing drawable, skip them immediately
                        orderLogicCard.push(currentState.getCurrentPlayer());
                        slotMap.put(currentState.getSlot(), null);
                    } else {
                        anyAssigned = true;
                        break;
                    }
                }
            }

            // If every player was skipped, jump straight to optional phase
            if (!anyAssigned) {
                transitionToOptionalOrNextRound();
            }

            return;
        }

        if (GameStages.RES_ACTIONS == currentState.getGameStage()) {
            orderLogicCard.push(currentState.getCurrentPlayer());
            slotMap.put(currentState.getSlot(), null);

            for (Map.Entry<Slot,Player> entry : slotMap.entrySet()) {
                if (entry.getValue() != null) {
                    if(disconnectedPlayers.containsKey(entry.getValue())&& disconnectedPlayers.get(entry.getValue()))
                    {
                        orderLogicCard.push(entry.getValue());
                        entry.setValue(null);
                        continue;
                    }
                    currentState.playerUpdate(entry.getValue(), entry.getKey());
                    boolean hasDrawableLower = currentState.getNLower() > 0
                            && (hasDrawableDown() || !getLowerListBuilding().isEmpty());
                    boolean hasDrawableUpper = currentState.getNUpper() > 0
                            && (hasDrawableUp() || !getUpperListBuilding().isEmpty());
                    if (!hasDrawableLower && !hasDrawableUpper) {
                        // This player also has nothing, skip and continue the loop
                        orderLogicCard.push(entry.getValue());
                        entry.setValue(null);
                    } else {
                        // Found a player with something to do, stop here
                        return;
                    }
                }
            }

            // All slots are now null → every player is done for this round
            transitionToOptionalOrNextRound();
            return;
        }

        if (GameStages.OPT_CARD_E == currentState.getGameStage()) {
            Player optionalPlayer = optionalCardQueue.poll();

            if (optionalPlayer != null) {
                currentState.playerUpdate(optionalPlayer, null);
                if(disconnectedPlayers.containsKey(currentState.getCurrentPlayer())&& disconnectedPlayers.get(currentState.getCurrentPlayer())) {
                    nextPlayerSetup();
                }
                return;
            }

            currentState.gameStageUpdate(GameStages.RES_EVENT);

            if (currentState.getRound() < 10) {
                nextRound();
                currentState.playerUpdate(orderLogicCard.pull(), null);
                currentState.gameStageUpdate(GameStages.SLOT_CHOICE);
            } else {
                currentState.gameStageUpdate(GameStages.ENDING);
                endGame();
            }
        }
    }
    /**
     * Transitions the game to the optional card phase or directly to the next round.
     *
     * <p>Builds a queue of non-disconnected players who own Building 12 (optional card effect).
     * If such players exist, the first one is set as the current player for their optional action.
     * Otherwise, if the round counter is below 10, the next round begins and the game stage
     * is set to {@link GameStages#SLOT_CHOICE}; if round 10 has been completed, the game ends.
     */
    private synchronized void transitionToOptionalOrNextRound() {
        currentState.gameStageUpdate(GameStages.OPT_CARD_E);

        optionalCardQueue = new LinkedList<>();
        for (Player p :playersList) {
            long count = p.getBuildingCards().stream().filter(x -> x.getEffectId() == 12).count();
            if (count > 0) {
                if(disconnectedPlayers.containsKey(p)&& disconnectedPlayers.get(p))
                {
                    continue;
                }
                optionalCardQueue.add(p);
            }
        }

        Player optionalPlayer = optionalCardQueue.poll();

        if (optionalPlayer != null) {
            currentState.playerUpdate(optionalPlayer, null);
            return;
        }

        if (currentState.getRound() < 10) {
            nextRound();
            for (Map.Entry<Player, Boolean> entry : new ArrayList<>(disconnectedPlayers.entrySet())) {
                if (!entry.getValue()) {
                    orderLogicCard.pushNoEffect(entry.getKey());
                    disconnectedPlayers.remove(entry.getKey());
                } else {
                    orderLogicCard.removeFromQueue(entry.getKey());
                }
            }
            currentState.playerUpdate(orderLogicCard.pull(), null);
            currentState.gameStageUpdate(GameStages.SLOT_CHOICE);
        } else {
            currentState.gameStageUpdate(GameStages.ENDING);
            endGame();
        }
    }
    /**
     * Checks whether there are any drawable upper tribe cards on the board,
     * i.e. upper tribe cards that are not event cards.
     *
     * @return {@code true} if at least one non-event upper tribe card is available, {@code false} otherwise.
     */
    private boolean hasDrawableUp()
    {
        return getUpperListTribeCards().stream().anyMatch(x -> !x.isEventCard());
    }

    /**
     * Checks whether there are any drawable lower tribe cards on the board,
     * i.e. lower tribe cards that are not event cards.
     *
     * @return {@code true} if at least one non-event lower tribe card is available, {@code false} otherwise.
     */
    private boolean hasDrawableDown()
    {
        return getLowerListTribeCards().stream().anyMatch(x -> !x.isEventCard());
    }
    /**
     * Resolves all pending event cards if the current game stage is {@code RESOLVING_EVENT}.
     * All pending events are activated on the player list.
     * Event cards of type {@code SUSTENANCE} are resolved after all other pending events.
     */
    private void eventResolution() {

        currentState.gameStageUpdate(GameStages.RES_EVENT);
        Queue<EventCard> events;
        events=board.getPendingEvents();
        ArrayList<EventCard>sustenance=events.stream().filter(x->x.getType().equals(EventType.SUSTENANCE)).collect(Collectors.toCollection(ArrayList::new));
        events.removeAll(sustenance);
        for(EventCard event:events)
        {
            event.activateEvent(playersList);
        }

        for(EventCard e : sustenance)
        {
            e.activateEvent(playersList);
        }

    }


    /**
     * Advances the game to the next round.
     * The method first resolves pending events.
     * If the current round is 10, the game stage is updated to {@code ENDING} and the game is ended.
     * Otherwise, the era is updated if the board changes era, and the round number is incremented.
     */
    private void nextRound() {

        eventResolution();
        if(currentState.getEra()!= board.nextRound())  {
            currentState.eraUpdate();
        }

        currentState.roundUpdate();

    }

    /**
     * Ends the game by applying all final building effects owned by each player
     * and updating the game stage to {@code ENDED}.
     */
    private void endGame() {
        Queue<EventCard> events;
        events=Stream.concat(board.getLowerListTribe().stream().filter(TribeCard::isEventCard),board.getUpperListTribe().stream().filter(TribeCard::isEventCard)).map(x->((EventCard)x)).collect(Collectors.toCollection(LinkedList::new));
        ArrayList<EventCard>sustenance=events.stream().filter(x->x.getType().equals(EventType.SUSTENANCE)).collect(Collectors.toCollection(ArrayList::new));
        events.removeAll(sustenance);
        events.forEach(event->event.activateEvent(playersList));
        sustenance.forEach(event->event.activateEvent(playersList));

        playersList.forEach(p->{
            int temp= p.getBuilders().stream().mapToInt(Builder::getPrestigeValue).sum();
            p.addPrestige(temp);
        });
        playersList.forEach(p->{
            int temp=(int) p.getInventors().stream().mapToInt(Inventor::getIcon).distinct().count();
            p.addPrestige(temp*p.getNType(CharacterType.INVENTOR));
        });
        playersList.forEach(p->{
            p.addPrestige(10 * (p.getNType(CharacterType.ARTIST)/2));
        });
        playersList.forEach(p->{
            int temp= p.getBuildingCards().stream().mapToInt(BuildingCard::getPrestigeValue).sum();
            p.addPrestige(temp);
        });
        playersList.forEach(
            p -> p.getBuildingCards().stream().filter(x -> x.getEffectType() == EffectType.FINAL).
            forEach(x -> x.applyEffect(p))
        );
        currentState.gameStageUpdate(GameStages.ENDED);
        playerStanding=new ArrayList<>(playersList);
        playerStanding.sort((y,x)->x.getPrestigeValue()==y.getPrestigeValue()?Integer.compare(x.getFoodValue(),y.getFoodValue()):Integer.compare(x.getPrestigeValue(),y.getPrestigeValue()));

    }

    /**
     * Sets the configured number of players for this game.
     * The operation succeeds only if the current configured number of players is 0.
     *
     * @param nPlayers the new configured number of players.
     * @return {@code true} if the number of players is updated, {@code false} otherwise.
     */
    public boolean setNPlayer(int nPlayers) {
        if (this.nPlayers != 0) {
            return false;
        }

        if (nPlayers < 2 || nPlayers > 5) {
            return false;
        }

        this.nPlayers = nPlayers;

        board = new Board(nPlayers);

        slotMap = new LinkedHashMap<>();
        for (Slot s : board.getSlotList()) {
            slotMap.put(s, null);
        }

        currentState = new CurrentState();
        playersList = new ArrayList<>();
        optionalCardQueue = new LinkedList<>();

        return true;
    }

    /**
     * Ends the game by forfeit and determines the final player standing.
     *
     * <p>The player who is still connected is declared the winner and placed
     * in the first position of the final ranking. The remaining players are
     * ordered by prestige value and, in case of a tie, by food value.
     */
    public synchronized void endGameForfeit() {
        Player winner = playersList.stream()
                .filter(x -> !disconnectedPlayers.containsKey(x) || !disconnectedPlayers.get(x))
                .findFirst().orElse(null);
        if (winner == null) return;
        currentState.gameStageUpdate(GameStages.ENDED);
        playerStanding = new ArrayList<>(playersList);
        playerStanding.remove(winner);
        playerStanding.sort((y, x) -> x.getPrestigeValue() == y.getPrestigeValue()
                ? Integer.compare(x.getFoodValue(), y.getFoodValue())
                : Integer.compare(x.getPrestigeValue(), y.getPrestigeValue()));
        playerStanding.add(0, winner);
    }


}