#include "iconhelper.h"

IconHelper *IconHelper::iconFontAliBaBa = 0;
IconHelper *IconHelper::iconFontAwesome = 0;
IconHelper *IconHelper::iconFontAwesome6 = 0;
IconHelper *IconHelper::iconFontWeather = 0;
int IconHelper::iconFontIndex = -1;

void IconHelper::initFont()
{
    static bool isInit = false;
    if (!isInit) {
        isInit = true;
        if (iconFontAliBaBa == 0) {
            iconFontAliBaBa = new IconHelper(":/font/iconfont.ttf", "iconfont");
        }
        if (iconFontAwesome == 0) {
            iconFontAwesome = new IconHelper(":/font/fontawesome-webfont.ttf", "FontAwesome");
        }
        if (iconFontAwesome6 == 0) {
            iconFontAwesome6 = new IconHelper(":/font/fa-regular-400.ttf", "Font Awesome 6 Pro Regular");
        }
        if (iconFontWeather == 0) {
            iconFontWeather = new IconHelper(":/font/pe-icon-set-weather.ttf", "pe-icon-set-weather");
        }
    }
}

void IconHelper::setIconFontIndex(int index)
{
    iconFontIndex = index;
}

QFont IconHelper::getIconFontAliBaBa()
{
    initFont();
    return iconFontAliBaBa->getIconFont();
}

QFont IconHelper::getIconFontAwesome()
{
    initFont();
    return iconFontAwesome->getIconFont();
}

QFont IconHelper::getIconFontAwesome6()
{
    initFont();
    return iconFontAwesome6->getIconFont();
}

QFont IconHelper::getIconFontWeather()
{
    initFont();
    return iconFontWeather->getIconFont();
}

IconHelper *IconHelper::getIconHelper(int icon)
{
    initFont();

    //指定了字体索引则取对应索引的字体类
    //没指定则自动根据不同的字体的值选择对应的类
    //由于部分值范围冲突所以可以指定索引来取
    //fontawesome   0xf000-0xf2e0
    //fontawesome6  0xe000-0xe33d 0xf000-0xf8ff
    //iconfont      0xe501-0xe793 0xe8d5-0xea5d 0xeb00-0xec00
    //weather       0xe900-0xe9cf

    IconHelper *iconHelper = iconFontAwesome;
    if (iconFontIndex < 0) {
        if ((icon >= 0xe501 && icon <= 0xe793) || (icon >= 0xe8d5 && icon <= 0xea5d) || (icon >= 0xeb00 && icon <= 0xec00)) {
            iconHelper = iconFontAliBaBa;
        }
    } else if (iconFontIndex == 0) {
        iconHelper = iconFontAliBaBa;
    } else if (iconFontIndex == 1) {
        iconHelper = iconFontAwesome;
    } else if (iconFontIndex == 2) {
        iconHelper = iconFontAwesome6;
    } else if (iconFontIndex == 3) {
        iconHelper = iconFontWeather;
    }

    return iconHelper;
}

void IconHelper::setIcon(QLabel *lab, int icon, quint32 size)
{
    getIconHelper(icon)->setIcon1(lab, icon, size);
}

void IconHelper::setIcon(QAbstractButton *btn, int icon, quint32 size)
{
    getIconHelper(icon)->setIcon1(btn, icon, size);
}

void IconHelper::setPixmap(QAbstractButton *btn, const QColor &color, int icon, quint32 size,
                           quint32 width, quint32 height, int flags)
{
    getIconHelper(icon)->setPixmap1(btn, color, icon, size, width, height, flags);
}

QPixmap IconHelper::getPixmap(const QColor &color, int icon, quint32 size,
                              quint32 width, quint32 height, int flags)
{
    return getIconHelper(icon)->getPixmap1(color, icon, size, width, height, flags);
}

void IconHelper::setStyle(QWidget *widget, QList<QPushButton *> btns,
                          QList<int> icons, const IconHelper::StyleColor &styleColor)
{
    int icon = icons.first();
    getIconHelper(icon)->setStyle1(widget, btns, icons, styleColor);
}

void IconHelper::setStyle(QWidget *widget, QList<QToolButton *> btns,
                          QList<int> icons, const IconHelper::StyleColor &styleColor)
{
    int icon = icons.first();
    getIconHelper(icon)->setStyle1(widget, btns, icons, styleColor);
}

void IconHelper::setStyle(QWidget *widget, QList<QAbstractButton *> btns,
                          QList<int> icons, const IconHelper::StyleColor &styleColor)
{
    int icon = icons.first();
    getIconHelper(icon)->setStyle1(widget, btns, icons, styleColor);
}


IconHelper::IconHelper(const QString &fontFile, const QString &fontName, QObject *parent) : QObject(parent)
{
    //判断图形字体是否存在,不存在则加入
    //这里暂时限制在同一个项目中只加载一次字体文件
    QFontDatabase fontDb;
    bool exist = false;//fontDb.families().contains(fontName);
    if (!exist && QFile(fontFile).exists()) {
        int fontId = fontDb.addApplicationFont(fontFile);
        QStringList listName = fontDb.applicationFontFamilies(fontId);
        if (listName.count() == 0) {
            qDebug() << QString("load %1 error").arg(fontName);
        }
    }

    //再次判断是否包含字体名称防止加载失败
    if (fontDb.families().contains(fontName)) {
        iconFont = QFont(fontName);
#if (QT_VERSION >= QT_VERSION_CHECK(4,8,0))
        iconFont.setHintingPreference(QFont::PreferNoHinting);
#endif
    }
}

bool IconHelper::eventFilter(QObject *watched, QEvent *event)
{
    //根据不同的
    if (watched->inherits("QAbstractButton")) {
        QAbstractButton *btn = (QAbstractButton *)watched;
        int index = btns.indexOf(btn);
        if (index >= 0) {
            //不同的事件设置不同的图标,同时区分选中的和没有选中的
            int type = event->type();
            if (btn->isChecked()) {
                if (type == QEvent::MouseButtonPress) {
                    QMouseEvent *mouseEvent = (QMouseEvent *)event;
                    if (mouseEvent->button() == Qt::LeftButton) {
                        btn->setIcon(QIcon(pixChecked.at(index)));
                    }
                } else if (type == QEvent::Enter) {
                    btn->setIcon(QIcon(pixChecked.at(index)));
                } else if (type == QEvent::Leave) {
                    btn->setIcon(QIcon(pixChecked.at(index)));
                }
            } else {
                if (type == QEvent::MouseButtonPress) {
                    QMouseEvent *mouseEvent = (QMouseEvent *)event;
                    if (mouseEvent->button() == Qt::LeftButton) {
                        btn->setIcon(QIcon(pixPressed.at(index)));
                    }
                } else if (type == QEvent::Enter) {
                    btn->setIcon(QIcon(pixHover.at(index)));
                } else if (type == QEvent::Leave) {
                    btn->setIcon(QIcon(pixNormal.at(index)));
                }
            }
        }
    }

    return QObject::eventFilter(watched, event);
}

void IconHelper::toggled(bool checked)
{
    //选中和不选中设置不同的图标
    QAbstractButton *btn = (QAbstractButton *)sender();
    int index = btns.indexOf(btn);
    if (checked) {
        btn->setIcon(QIcon(pixChecked.at(index)));
    } else {
        btn->setIcon(QIcon(pixNormal.at(index)));
    }
}

QFont IconHelper::getIconFont()
{
    return this->iconFont;
}

void IconHelper::setIcon1(QLabel *lab, int icon, quint32 size)
{
    iconFont.setPixelSize(size);
    lab->setFont(iconFont);
    lab->setText((QChar)icon);
}

void IconHelper::setIcon1(QAbstractButton *btn, int icon, quint32 size)
{
    iconFont.setPixelSize(size);
    btn->setFont(iconFont);
    btn->setText((QChar)icon);
}

void IconHelper::setPixmap1(QAbstractButton *btn, const QColor &color, int icon, quint32 size,
                            quint32 width, quint32 height, int flags)
{
    btn->setIcon(getPixmap1(color, icon, size, width, height, flags));
}

QPixmap IconHelper::getPixmap1(const QColor &color, int icon, quint32 size,
                               quint32 width, quint32 height, int flags)
{
    //主动绘制图形字体到图片
    QPixmap pix(width, height);
    pix.fill(Qt::transparent);

    QPainter painter;
    painter.begin(&pix);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
    painter.setPen(color);

    iconFont.setPixelSize(size);
    painter.setFont(iconFont);
    painter.drawText(pix.rect(), flags, (QChar)icon);
    painter.end();
    return pix;
}

void IconHelper::setStyle1(QWidget *widget, QList<QPushButton *> btns, QList<int> icons, const IconHelper::StyleColor &styleColor)
{
    QList<QAbstractButton *> list;
    foreach (QPushButton *btn, btns) {
        list << btn;
    }

    setStyle(widget, list, icons, styleColor);
}

void IconHelper::setStyle1(QWidget *widget, QList<QToolButton *> btns, QList<int> icons, const IconHelper::StyleColor &styleColor)
{
    QList<QAbstractButton *> list;
    foreach (QToolButton *btn, btns) {
        list << btn;
    }

    setStyle(widget, list, icons, styleColor);
}

void IconHelper::setStyle1(QWidget *widget, QList<QAbstractButton *> btns, QList<int> icons, const IconHelper::StyleColor &styleColor)
{
    int btnCount = btns.count();
    int iconCount = icons.count();
    if (btnCount <= 0 || iconCount <= 0 || btnCount != iconCount) {
        return;
    }

    QString position = styleColor.position;
    quint32 btnWidth = styleColor.btnWidth;
    quint32 btnHeight = styleColor.btnHeight;
    quint32 iconSize = styleColor.iconSize;
    quint32 iconWidth = styleColor.iconWidth;
    quint32 iconHeight = styleColor.iconHeight;
    quint32 borderWidth = styleColor.borderWidth;

    //根据不同的位置计算边框
    QString strBorder;
    if (position == "top") {
        strBorder = QString("border-width:%1px 0px 0px 0px;padding-top:%1px;padding-bottom:%2px;")
                    .arg(borderWidth).arg(borderWidth * 2);
    } else if (position == "right") {
        strBorder = QString("border-width:0px %1px 0px 0px;padding-right:%1px;padding-left:%2px;")
                    .arg(borderWidth).arg(borderWidth * 2);
    } else if (position == "bottom") {
        strBorder = QString("border-width:0px 0px %1px 0px;padding-bottom:%1px;padding-top:%2px;")
                    .arg(borderWidth).arg(borderWidth * 2);
    } else if (position == "left") {
        strBorder = QString("border-width:0px 0px 0px %1px;padding-left:%1px;padding-right:%2px;")
                    .arg(borderWidth).arg(borderWidth * 2);
    }

    //如果图标是左侧显示则需要让没有选中的按钮左侧也有加深的边框,颜色为背景颜色
    //如果图标在文字上面而设置的边框是 top bottom 也需要启用加深边框
    QStringList qss;
    if (styleColor.defaultBorder) {
        qss << QString("QWidget[flag=\"%1\"] QAbstractButton{border-style:solid;border-radius:0px;%2border-color:%3;color:%4;background:%5;}")
            .arg(position).arg(strBorder).arg(styleColor.normalBgColor).arg(styleColor.normalTextColor).arg(styleColor.normalBgColor);
    } else {
        qss << QString("QWidget[flag=\"%1\"] QAbstractButton{border-style:none;border-radius:0px;padding:5px;color:%2;background:%3;}")
            .arg(position).arg(styleColor.normalTextColor).arg(styleColor.normalBgColor);
    }

    //悬停+按下+选中
    qss << QString("QWidget[flag=\"%1\"] QAbstractButton:hover{border-style:solid;%2border-color:%3;color:%4;background:%5;}")
        .arg(position).arg(strBorder).arg(styleColor.borderColor).arg(styleColor.hoverTextColor).arg(styleColor.hoverBgColor);
    qss << QString("QWidget[flag=\"%1\"] QAbstractButton:pressed{border-style:solid;%2border-color:%3;color:%4;background:%5;}")
        .arg(position).arg(strBorder).arg(styleColor.borderColor).arg(styleColor.pressedTextColor).arg(styleColor.pressedBgColor);
    qss << QString("QWidget[flag=\"%1\"] QAbstractButton:checked{border-style:solid;%2border-color:%3;color:%4;background:%5;}")
        .arg(position).arg(strBorder).arg(styleColor.borderColor).arg(styleColor.checkedTextColor).arg(styleColor.checkedBgColor);

    //窗体背景颜色+按钮背景颜色
    qss << QString("QWidget#%1{background:%2;}")
        .arg(widget->objectName()).arg(styleColor.normalBgColor);
    qss << QString("QWidget>QAbstractButton{border-width:0px;background-color:%1;color:%2;}")
        .arg(styleColor.normalBgColor).arg(styleColor.normalTextColor);
    qss << QString("QWidget>QAbstractButton:hover{background-color:%1;color:%2;}")
        .arg(styleColor.hoverBgColor).arg(styleColor.hoverTextColor);
    qss << QString("QWidget>QAbstractButton:pressed{background-color:%1;color:%2;}")
        .arg(styleColor.pressedBgColor).arg(styleColor.pressedTextColor);
    qss << QString("QWidget>QAbstractButton:checked{background-color:%1;color:%2;}")
        .arg(styleColor.checkedBgColor).arg(styleColor.checkedTextColor);

    //按钮宽度高度
    if (btnWidth > 0) {
        qss << QString("QWidget>QAbstractButton{min-width:%1px;}").arg(btnWidth);
    }
    if (btnHeight > 0) {
        qss << QString("QWidget>QAbstractButton{min-height:%1px;}").arg(btnHeight);
    }

    //设置样式表
    widget->setStyleSheet(qss.join(""));

    //可能会重复调用设置所以先要移除上一次的
    for (int i = 0; i < btnCount; ++i) {
        for (int j = 0; j < this->btns.count(); j++) {
            if (this->btns.at(j) == btns.at(i)) {
                disconnect(btns.at(i), SIGNAL(toggled(bool)), this, SLOT(toggled(bool)));
                this->btns.at(j)->removeEventFilter(this);
                this->btns.removeAt(j);
                this->pixNormal.removeAt(j);
                this->pixHover.removeAt(j);
                this->pixPressed.removeAt(j);
                this->pixChecked.removeAt(j);
                break;
            }
        }
    }

    //存储对应按钮对象,方便鼠标移上去的时候切换图片
    int checkedIndex = -1;
    for (int i = 0; i < btnCount; ++i) {
        int icon = icons.at(i);
        QPixmap pixNormal = getPixmap1(styleColor.normalTextColor, icon, iconSize, iconWidth, iconHeight);
        QPixmap pixHover = getPixmap1(styleColor.hoverTextColor, icon, iconSize, iconWidth, iconHeight);
        QPixmap pixPressed = getPixmap1(styleColor.pressedTextColor, icon, iconSize, iconWidth, iconHeight);
        QPixmap pixChecked = getPixmap1(styleColor.checkedTextColor, icon, iconSize, iconWidth, iconHeight);

        //记住最后选中的按钮
        QAbstractButton *btn = btns.at(i);
        if (btn->isChecked()) {
            checkedIndex = i;
        }

        btn->setIcon(QIcon(pixNormal));
        btn->setIconSize(QSize(iconWidth, iconHeight));
        btn->installEventFilter(this);
        connect(btn, SIGNAL(toggled(bool)), this, SLOT(toggled(bool)));

        this->btns << btn;
        this->pixNormal << pixNormal;
        this->pixHover << pixHover;
        this->pixPressed << pixPressed;
        this->pixChecked << pixChecked;
    }

    //主动触发一下选中的按钮
    if (checkedIndex >= 0) {
        QMetaObject::invokeMethod(btns.at(checkedIndex), "toggled", Q_ARG(bool, true));
    }
}
