#include "Text_Shower.h"
#include <QFontMetrics>
#include <QPainter>
#include <algorithm>
namespace Psc {
Text_Shower::Text_Shower(QWidget* parent) : QWidget(parent) {
    setAttribute(Qt::WA_TranslucentBackground);
    // 宽度交给布局，高度最小
    setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum);
}
void Text_Shower::set_text(const QString& text) {
    m_text = text;
    updateGeometry(); // 通知布局重新计算
    update();
}
void Text_Shower::set_title(const QString& title) {
    m_title = title;
    updateGeometry();
    update();
}
void Text_Shower::set_max_width(int w) {
    m_max_width = w;
    updateGeometry();
}
bool Text_Shower::hasHeightForWidth() const {
    return true;
}
int Text_Shower::heightForWidth(int width) const {
    width = std::min(width, m_max_width);
    return calculate_height(width);
}
QSize Text_Shower::sizeHint() const {
    int w = std::min(400, m_max_width);
    return QSize(w, calculate_height(w));
}
QSize Text_Shower::minimumSizeHint() const {
    return QSize(120, 40);
}
int Text_Shower::calculate_height(int width) const {
    QFontMetrics fm(font());
    int content_width = width - m_padding * 2;
    if (content_width <= 0)
        return 40;
    QRect text_rect = fm.boundingRect(
    QRect(0, 0, content_width, 10000),
    Qt::TextWordWrap,
    m_text);
    int height = text_rect.height();
    if (!m_title.isEmpty()) {
        QFont title_font = font();
        title_font.setBold(true);
        QFontMetrics title_fm(title_font);
        height += title_fm.height() + 6;
    }
    height += m_padding * 2;
    return height;
}
void Text_Shower::paintEvent(QPaintEvent*) {
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    QRect r = rect();
    painter.setBrush(QColor(255, 255, 255));
    painter.setPen(QPen(QColor(0, 0, 0), 1));
    painter.drawRoundedRect(r.adjusted(0, 0, -1, -1), m_radius, m_radius);
    int y = m_padding;
    if (!m_title.isEmpty()) {
        QFont title_font = font();
        title_font.setBold(true);
        painter.setFont(title_font);
        QFontMetrics title_fm(title_font);
        painter.drawText(m_padding,
                         y + title_fm.ascent(),
                         m_title);
        y += title_fm.height() + 6;
        painter.setFont(font());
    }
    QRect text_rect(m_padding, y,
                   width() - m_padding * 2,
                   height() - y - m_padding);
    painter.drawText(text_rect,
                     Qt::AlignLeft | Qt::TextWordWrap,
                     m_text);
}
} // namespace Psc