#ifndef GAMESTATE_H
#define GAMESTATE_H

#include <QObject>
#include <qqmlintegration.h>
#include "playingcard.h"
#include "columnslot.h"

class GameState : public QObject
{
    Q_OBJECT
    QML_ELEMENT
    QML_SINGLETON
    Q_PROPERTY(QList<PlayingCard*> drawPile READ drawPile NOTIFY drawPileChanged)
    Q_PROPERTY(QList<PlayingCard*> throwawayPile READ throwawayPile NOTIFY throwawayPileChanged)
    Q_PROPERTY(QList<QList<ColumnSlot*>> columns READ columns NOTIFY columnsChanged)
    Q_PROPERTY(QList<QList<PlayingCard*>> foundation READ foundation NOTIFY foundationChanged)
    Q_PROPERTY(bool gameWon READ gameWon NOTIFY gameWonChanged)

public:
    explicit GameState(QObject *parent = nullptr);

    // Getters
    QList<PlayingCard*> drawPile() const;
    QList<PlayingCard*> throwawayPile() const;
    QList<QList<ColumnSlot*>> columns() const;
    QList<QList<PlayingCard*>> foundation() const;
    bool gameWon() const;

    // General functions
    Q_INVOKABLE void dealCards();
    Q_INVOKABLE void setupWinningDeck();
    Q_INVOKABLE void drawNextCard();

    // Manual moves (from X to Y)
    Q_INVOKABLE bool moveThrownCardToColumn(int columnId);
    Q_INVOKABLE bool moveThrownCardToFoundation(int foundationId);
    Q_INVOKABLE bool moveColumnCardToColumn(int fromColumnId, int toColumnId, int fromCardIndex);
    Q_INVOKABLE bool moveColumnCardToFoundation(int columnId, int foundationId);

    // Automatic moves (from X to auto)
    Q_INVOKABLE bool autoMoveThrownCard();
    Q_INVOKABLE bool autoMoveColumnCard(int columnId, int cardIndex);

signals:
    void drawPileChanged();
    void throwawayPileChanged();
    void columnsChanged();
    void foundationChanged();
    void gameWonChanged();

private slots:
    void onFoundationChanged();

private:
    QList<PlayingCard*> m_drawPile;
    QList<PlayingCard*> m_throwawayPile;
    QList<QList<ColumnSlot*>> m_columns;
    QList<QList<PlayingCard*>> m_foundation;
    bool m_gameWon;

    void cleanupBoard(bool emitChanges);

    bool tryAutoMoveSingleCard(PlayingCard& cardToMove, int skipColumnId = -1);
    bool tryAutoMoveMultipleCards(const QList<PlayingCard*>& cards, int skipColumnId);

    bool isFoundationMoveValid(const PlayingCard& cardToMove, int foundationId);
    bool isColumnMoveValid(const PlayingCard& cardToMove, int columnId);

    void ensureColumnRevealed(int columnId);
};

#endif // GAMESTATE_H