// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

//
//  W A R N I N G
//  -------------
//
// This file is not part of the QtGraphs API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.

#ifndef Q3DTHEME_P_H
#define Q3DTHEME_P_H

#include <QtCore/private/qobject_p.h>
#include "q3dtheme.h"
#include <private/graphsglobal_p.h>

QT_BEGIN_NAMESPACE

struct Q3DThemeDirtyBitField
{
    bool ambientLightStrengthDirty : 1;
    bool backgroundColorDirty : 1;
    bool backgroundEnabledDirty : 1;
    bool baseColorDirty : 1;
    bool baseGradientDirty : 1;
    bool colorStyleDirty : 1;
    bool fontDirty : 1;
    bool gridEnabledDirty : 1;
    bool gridLineColorDirty : 1;
    bool labelBackgroundColorDirty : 1;
    bool labelBackgroundEnabledDirty : 1;
    bool labelBorderEnabledDirty : 1;
    bool labelTextColorDirty : 1;
    bool labelsEnabledDirty : 1;
    bool lightColorDirty : 1;
    bool lightStrengthDirty : 1;
    bool multiHighlightColorDirty : 1;
    bool multiHighlightGradientDirty : 1;
    bool shadowStrengthDirty : 1;
    bool singleHighlightColorDirty : 1;
    bool singleHighlightGradientDirty : 1;
    bool themeIdDirty : 1;
    bool windowColorDirty : 1;

    Q3DThemeDirtyBitField()
        : ambientLightStrengthDirty(false)
        , backgroundColorDirty(false)
        , backgroundEnabledDirty(false)
        , baseColorDirty(false)
        , baseGradientDirty(false)
        , colorStyleDirty(false)
        , fontDirty(false)
        , gridEnabledDirty(false)
        , gridLineColorDirty(false)
        , labelBackgroundColorDirty(false)
        , labelBackgroundEnabledDirty(false)
        , labelBorderEnabledDirty(false)
        , labelTextColorDirty(false)
        , labelsEnabledDirty(false)
        , lightColorDirty(false)
        , lightStrengthDirty(false)
        , multiHighlightColorDirty(false)
        , multiHighlightGradientDirty(false)
        , shadowStrengthDirty(false)
        , singleHighlightColorDirty(false)
        , singleHighlightGradientDirty(false)
        , themeIdDirty(false)
        , windowColorDirty(false)
    {}
};

class Q_GRAPHS_EXPORT Q3DThemePrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(Q3DTheme)
public:
    enum class GradientType { Base, SingleHL, MultiHL };

    Q3DThemePrivate();
    ~Q3DThemePrivate() override;

    void resetDirtyBits();

    bool sync(Q3DThemePrivate &other);

    inline bool isDefaultTheme() { return m_isDefaultTheme; }
    inline void setDefaultTheme(bool isDefault) { m_isDefaultTheme = isDefault; }

    // If m_forcePredefinedType is true, it means we should forcibly update all
    // properties of the theme to those of the predefined theme, when setting the
    // theme type. Otherwise we only change the properties that haven't been
    // explicitly changed since last render cycle. Defaults to true, and is only
    // ever set to false by DeclarativeTheme3D to enable using predefined themes
    // as base for custom themes, since the order of initial property sets cannot
    // be easily controlled in QML.
    inline bool isForcePredefinedType() { return m_forcePredefinedType; }
    inline void setForcePredefinedType(bool enable) { m_forcePredefinedType = enable; }

    // QML API spcific methods
    void clearDummyColors();
    void clearDummyGradients();
    void setThemeGradient(QJSValue gradient, GradientType type);
    QLinearGradient convertGradient(QJSValue gradient);

public:
    Q3DTheme::Theme m_themeId;

    Q3DThemeDirtyBitField m_dirtyBits;

    Q3DTheme::ColorStyle m_colorStyle;
    QColor m_backgroundColor;
    QColor m_gridLineColor;
    QColor m_lightColor;
    QColor m_multiHighlightColor;
    QColor m_singleHighlightColor;
    QColor m_textBackgroundColor;
    QColor m_textColor;
    QColor m_windowColor;
    QFont m_font;
    QLinearGradient m_multiHighlightGradient;
    QLinearGradient m_singleHighlightGradient;
    QList<QColor> m_baseColors;
    QList<QLinearGradient> m_baseGradients;
    bool m_backgoundEnabled;
    bool m_forcePredefinedType;
    bool m_gridEnabled;
    bool m_isDefaultTheme;
    bool m_labelBackground;
    bool m_labelBorders;
    bool m_labelsEnabled;
    float m_ambientLightStrength;
    float m_lightStrength;
    float m_shadowStrength;

    // QML API specific variables
    QList<QQuickGraphsColor *> m_colors;
    QList<QQuickGradient *> m_gradients;
    QJSValue m_singleHLGradient;
    QJSValue m_multiHLGradient;

    bool m_dummyColors = false;
};

QT_END_NAMESPACE

#endif
