#include "tooltipbutton.h"

#include <QDebug>
#include <QPoint>
#include <QPropertyAnimation>

TooltipButton::TooltipButton(QWidget *parent) : QLabel(parent) {
    setMouseTracking(true);

    _tooltip_parent_widget = this;

    _tooltip_label = new QLabel(this);
    _tooltip_label->setText("Tooltip.");
    _tooltip_label->setMaximumWidth(360);
    _tooltip_label->setWordWrap(true);
    _tooltip_label->setStyleSheet("padding: 8px; background-color: #222; border: 1px solid #fff; border-radius: 5px; color: #fff");
    _tooltip_label->hide();

    _tooltip_label_arrow = new QWidget(this);
    _tooltip_label_arrow->setStyleSheet("border-image: url(:/buttons/tooltip_triangle.png);");
    _tooltip_label_arrow->resize(14, 7);
    _tooltip_label_arrow->hide();

    _tooltip_opacity_effect = new QGraphicsOpacityEffect(this);
    _tooltip_arrow_opacity_effect = new QGraphicsOpacityEffect(this);

    _tooltip_label->setGraphicsEffect(_tooltip_opacity_effect);
    _tooltip_label_arrow->setGraphicsEffect(_tooltip_arrow_opacity_effect);
}

TooltipButton::~TooltipButton() {
    _tooltip_label->deleteLater();
    _tooltip_label_arrow->deleteLater();
    _tooltip_opacity_effect->deleteLater();
    _tooltip_arrow_opacity_effect->deleteLater();
}

void TooltipButton::enterEvent(QEvent*) {
   QPropertyAnimation *animation = new QPropertyAnimation(_tooltip_opacity_effect, "opacity");
   animation->setDuration(300);
   animation->setStartValue(0);
   animation->setEndValue(1);
   animation->setEasingCurve(QEasingCurve::InBack);
   animation->start(QPropertyAnimation::DeleteWhenStopped);
   _tooltip_label->show();

   QPropertyAnimation *arrow_animation = new QPropertyAnimation(_tooltip_arrow_opacity_effect, "opacity");
   arrow_animation->setDuration(300);
   arrow_animation->setStartValue(0);
   arrow_animation->setEndValue(1);
   arrow_animation->setEasingCurve(QEasingCurve::InBack);
   arrow_animation->start(QPropertyAnimation::DeleteWhenStopped);
   _tooltip_label_arrow->show();
}

void TooltipButton::leaveEvent(QEvent*) {
    QPropertyAnimation *animation = new QPropertyAnimation(_tooltip_opacity_effect, "opacity");
    animation->setDuration(300);
    animation->setStartValue(1);
    animation->setEndValue(0);
    animation->setEasingCurve(QEasingCurve::InBack);
    animation->start(QPropertyAnimation::DeleteWhenStopped);
    connect(animation, &QPropertyAnimation::finished, _tooltip_label, &QLabel::hide);

    QPropertyAnimation *arrow_animation = new QPropertyAnimation(_tooltip_arrow_opacity_effect, "opacity");
    arrow_animation->setDuration(300);
    arrow_animation->setStartValue(1);
    arrow_animation->setEndValue(0);
    arrow_animation->setEasingCurve(QEasingCurve::InBack);
    arrow_animation->start(QPropertyAnimation::DeleteWhenStopped);
    connect(arrow_animation, &QPropertyAnimation::finished, _tooltip_label_arrow, &QLabel::hide);
}

void TooltipButton::moveEvent(QMoveEvent*) {
    updateTooltipPosition();
}

void TooltipButton::resizeEvent(QResizeEvent*) {
    updateTooltipPosition();
}

void TooltipButton::setTooltipParentWidget(QWidget *widget) {
    _tooltip_parent_widget = widget;
    _tooltip_label->setParent(widget);
    _tooltip_label_arrow->setParent(widget);
    updateTooltipPosition();
}

void TooltipButton::setTooltipText(QString text) {
    _tooltip_label->setText(text);
    updateTooltipPosition();
}

void TooltipButton::updateTooltipPosition() {
    QPoint pos_global = mapToGlobal((rect().topLeft() + rect().topRight()) / 2);
    QPoint pos_relative_to_tooltip_parent = _tooltip_parent_widget->mapFromGlobal(pos_global);
    pos_relative_to_tooltip_parent.rx() -= _tooltip_label->sizeHint().width() / 2;
    pos_relative_to_tooltip_parent.ry() -= _tooltip_label->sizeHint().height() + 6; // 10 for tooltip arrow
    _tooltip_label->move(pos_relative_to_tooltip_parent);

    QPoint tooltip_arrow_pos = _tooltip_parent_widget->mapFromGlobal(pos_global) - QPoint(7, 7);
    _tooltip_label_arrow->move(tooltip_arrow_pos);
}