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#include "textbutton.h"

#include "demoitemanimation.h"

#include "demotextitem.h"

#include "colors.h"

#include "menumanager.h"

#define BUTTON_WIDTH 180

#define BUTTON_HEIGHT 19

class ButtonBackground : public DemoItem

{

public:

    TextButton::BUTTONTYPE type;

    bool highlighted;

    bool pressed;

    QSize logicalSize;

    ButtonBackground(TextButton::BUTTONTYPE type, bool highlighted, bool pressed, QSize logicalSize,

        QGraphicsScene *scene, QGraphicsItem *parent) : DemoItem(scene, parent)

    {

        this->type = type;

        this->highlighted = highlighted;

        this->pressed = pressed;

        this->logicalSize = logicalSize;

        useSharedImage(QString(__FILE__) + static_cast<int>(type) + highlighted + pressed);

    }

protected:

    QImage *createImage(const QMatrix &matrix) const

    {

        if (type == TextButton::SIDEBAR || type == TextButton::PANEL)

            return createRoundButtonBackground(matrix);

        else

            return createArrowBackground(matrix);

    }

    QImage *createRoundButtonBackground(const QMatrix &matrix) const

    {

        QRect scaledRect;

        scaledRect = matrix.mapRect(QRect(0, 0, this->logicalSize.width(), this->logicalSize.height()));

        QImage *image = new QImage(scaledRect.width(), scaledRect.height(), QImage::Format_ARGB32_Premultiplied);

        image->fill(QColor(0, 0, 0, 0).rgba());

        QPainter painter(image);

        painter.setRenderHint(QPainter::SmoothPixmapTransform);

        painter.setRenderHint(QPainter::Antialiasing);

        painter.setPen(Qt::NoPen);

        if (Colors::useEightBitPalette){

            painter.setPen(QColor(120, 120, 120));

            if (this->pressed)

                painter.setBrush(QColor(60, 60, 60));

            else if (this->highlighted)

                painter.setBrush(QColor(100, 100, 100));

            else

                painter.setBrush(QColor(80, 80, 80));

        }

        else {

            QLinearGradient outlinebrush(0, 0, 0, scaledRect.height());

            QLinearGradient brush(0, 0, 0, scaledRect.height());

            brush.setSpread(QLinearGradient::PadSpread);

            QColor highlight(255, 255, 255, 70);

            QColor shadow(0, 0, 0, 70);

            QColor sunken(220, 220, 220, 30);

            QColor normal1(255, 255, 245, 60);

            QColor normal2(255, 255, 235, 10);

            if (this->type == TextButton::PANEL){

                normal1 = QColor(200, 170, 160, 50);

                normal2 = QColor(50, 10, 0, 50);

            }

           if (pressed) {

               outlinebrush.setColorAt(0.0f, shadow);

               outlinebrush.setColorAt(1.0f, highlight);

               brush.setColorAt(0.0f, sunken);

               painter.setPen(Qt::NoPen);

           } else {

               outlinebrush.setColorAt(1.0f, shadow);

               outlinebrush.setColorAt(0.0f, highlight);

               brush.setColorAt(0.0f, normal1);

               if (!this->highlighted)

                   brush.setColorAt(1.0f, normal2);

               painter.setPen(QPen(outlinebrush, 1));

           }

           painter.setBrush(brush);

        }

        if (this->type == TextButton::PANEL)

            painter.drawRect(0, 0, scaledRect.width(), scaledRect.height());

        else

            painter.drawRoundedRect(0, 0, scaledRect.width(), scaledRect.height(), 10, 90, Qt::RelativeSize);

        return image;

    }

    QImage *createArrowBackground(const QMatrix &matrix) const

    {

        QRect scaledRect;

        scaledRect = matrix.mapRect(QRect(0, 0, this->logicalSize.width(), this->logicalSize.height()));

        QImage *image = new QImage(scaledRect.width(), scaledRect.height(), QImage::Format_ARGB32_Premultiplied);

        image->fill(QColor(0, 0, 0, 0).rgba());

        QPainter painter(image);

        painter.setRenderHint(QPainter::SmoothPixmapTransform);

        painter.setRenderHint(QPainter::Antialiasing);

        painter.setPen(Qt::NoPen);

        if (Colors::useEightBitPalette){

            painter.setPen(QColor(120, 120, 120));

            if (this->pressed)

                painter.setBrush(QColor(60, 60, 60));

            else if (this->highlighted)

                painter.setBrush(QColor(100, 100, 100));

            else

                painter.setBrush(QColor(80, 80, 80));

        }

        else {

            QLinearGradient outlinebrush(0, 0, 0, scaledRect.height());

            QLinearGradient brush(0, 0, 0, scaledRect.height());

            brush.setSpread(QLinearGradient::PadSpread);

            QColor highlight(255, 255, 255, 70);

            QColor shadow(0, 0, 0, 70);

            QColor sunken(220, 220, 220, 30);

            QColor normal1 = QColor(200, 170, 160, 50);

            QColor normal2 = QColor(50, 10, 0, 50);

           if (pressed) {

               outlinebrush.setColorAt(0.0f, shadow);

               outlinebrush.setColorAt(1.0f, highlight);

               brush.setColorAt(0.0f, sunken);

               painter.setPen(Qt::NoPen);

           } else {

               outlinebrush.setColorAt(1.0f, shadow);

               outlinebrush.setColorAt(0.0f, highlight);

               brush.setColorAt(0.0f, normal1);

               if (!this->highlighted)

                   brush.setColorAt(1.0f, normal2);

               painter.setPen(QPen(outlinebrush, 1));

           }

           painter.setBrush(brush);

        }

        painter.drawRect(0, 0, scaledRect.width(), scaledRect.height());

        float xOff = scaledRect.width() / 2;

        float yOff = scaledRect.height() / 2;

        float sizex = 3.0f * matrix.m11();

        float sizey = 1.5f * matrix.m22();

        if (this->type == TextButton::UP)

            sizey *= -1;

        QPainterPath path;

        path.moveTo(xOff, yOff + (5 * sizey));

        path.lineTo(xOff - (4 * sizex), yOff - (3 * sizey));

        path.lineTo(xOff + (4 * sizex), yOff - (3 * sizey));

        path.lineTo(xOff, yOff + (5 * sizey));

        painter.drawPath(path);

        return image;

    }

};

TextButton::TextButton(const QString &text, ALIGNMENT align, int userCode,

    QGraphicsScene *scene, QGraphicsItem *parent, BUTTONTYPE type)

    : DemoItem(scene, parent)

{

    this->menuString = text;

    this->buttonLabel = text;

    this->alignment = align;

    this->buttonType = type;

    this->userCode = userCode;

    this->bgOn = 0;

    this->bgOff = 0;

    this->bgHighlight = 0;

    this->bgDisabled = 0;

    this->state = OFF;

    this->setAcceptsHoverEvents(true);

    this->setCursor(Qt::PointingHandCursor);

    // Calculate button size:

    const int w = 180;

    const int h = 19;

    if (type == SIDEBAR || type == PANEL)

        this->logicalSize = QSize(w, h);

    else

        this->logicalSize = QSize(int((w / 2.0f) - 5), int(h * 1.5f));

}

void TextButton::setMenuString(const QString &menu)

{

    this->menuString = menu;

}

void TextButton::prepare()

{

    if (!this->prepared){

        this->prepared = true;

        this->setupHoverText();

        this->setupScanItem();

        this->setupButtonBg();

    }

}

TextButton::~TextButton()

{

    if (this->prepared){

        if (Colors::useButtonBalls)

            delete this->scanAnim;

    }

}

QRectF TextButton::boundingRect() const

{

    return QRectF(0, 0, this->logicalSize.width(), this->logicalSize.height());

};

void TextButton::setupHoverText()

{

    if (this->buttonLabel.isEmpty())

        return;

    DemoTextItem *textItem = new DemoTextItem(this->buttonLabel, Colors::buttonFont(), Colors::buttonText, -1, this->scene(), this);

    textItem->setZValue(zValue() + 2);

    textItem->setPos(16, 0);

}

void TextButton::setupScanItem()

{

    if (Colors::useButtonBalls){

        ScanItem *scanItem = new ScanItem(0, this);

        scanItem->setZValue(zValue() + 1);

        this->scanAnim = new DemoItemAnimation(scanItem);

        this->scanAnim->timeline->setLoopCount(1);

        float x = 1;

        float y = 1.5f;

        float stop = BUTTON_WIDTH - scanItem->boundingRect().width() - x;

        if (this->alignment == LEFT){

            this->scanAnim->setDuration(2500);

            this->scanAnim->setPosAt(0.0, QPointF(x, y));

            this->scanAnim->setPosAt(0.5, QPointF(x, y));

            this->scanAnim->setPosAt(0.7, QPointF(stop, y));

            this->scanAnim->setPosAt(1.0, QPointF(x, y));

            scanItem->setPos(QPointF(x, y));

        }

        else {

            this->scanAnim->setPosAt(0.0, QPointF(stop, y));

            this->scanAnim->setPosAt(0.5, QPointF(x, y));

            this->scanAnim->setPosAt(1.0, QPointF(stop, y));

            scanItem->setPos(QPointF(stop, y));

        }

    }

}

void TextButton::setState(STATE state)

{

    this->state = state;

    this->bgOn->setRecursiveVisible(state == ON);

    this->bgOff->setRecursiveVisible(state == OFF);

    this->bgHighlight->setRecursiveVisible(state == HIGHLIGHT);

    this->bgDisabled->setRecursiveVisible(state == DISABLED);

    this->setCursor(state == DISABLED ? Qt::ArrowCursor : Qt::PointingHandCursor);

}

void TextButton::setupButtonBg()

{

    this->bgOn = new ButtonBackground(this->buttonType, true, true, this->logicalSize, this->scene(), this);

    this->bgOff = new ButtonBackground(this->buttonType, false, false, this->logicalSize, this->scene(), this);

    this->bgHighlight = new ButtonBackground(this->buttonType, true, false, this->logicalSize, this->scene(), this);

    this->bgDisabled = new ButtonBackground(this->buttonType, true, true, this->logicalSize, this->scene(), this);

    this->setState(OFF);

}

void TextButton::hoverEnterEvent(QGraphicsSceneHoverEvent *)

{

    if (this->locked || this->state == DISABLED)

        return;

    if (this->state == OFF){

        this->setState(HIGHLIGHT);

        if (Colors::noAnimations && Colors::useButtonBalls){

            // wait a bit in the beginning

            // to enhance the effect. Have to this here

            // so that the adaption can be dynamic

            this->scanAnim->setDuration(1000);

            this->scanAnim->setPosAt(0.2, this->scanAnim->posAt(0));

        }

        if (MenuManager::instance()->window->fpsMedian > 10

            || Colors::noAdapt

            || Colors::noTimerUpdate){

            if (Colors::useButtonBalls)

                this->scanAnim->play(true, true);

        }

    }

}

void TextButton::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)

{

    Q_UNUSED(event);

    if (this->state == DISABLED)

        return;

    this->setState(OFF);

    if (Colors::noAnimations && Colors::useButtonBalls)

        this->scanAnim->stop();

}

void TextButton::mousePressEvent(QGraphicsSceneMouseEvent *)

{

    if (this->state == DISABLED)

        return;

    if (this->state == HIGHLIGHT || this->state == OFF)

        this->setState(ON);

}

void TextButton::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)

{

    if (this->state == ON){

        this->setState(OFF);

        if (!this->locked && this->boundingRect().contains(event->pos())){

            MenuManager::instance()->itemSelected(this->userCode, this->menuString);

        }

    }

}

void TextButton::animationStarted(int)

{

    if (this->state == DISABLED)

        return;

    this->setState(OFF);

}