#pragma once
#include <QColor>
#include <QEvent>
#include <QIcon>
#include <QMouseEvent>
#include <QPainter>
#include <QPen>
#include <QTextLayout>
#include <QVBoxLayout>
#include <QWidget>
#include "Delegate.h"
#include "Layout.h"
#include "../SVG.h"
namespace Psc {
class Border : public E {
public:
    int width = 4;
    QPen pen = QPen();
    QColor color = Qt::red;
    std::optional<QColor> filled_color = QColor(200, 0, 0);
    Border() {
    }
    Border(int width, QPen pen, QColor color) : width(width), pen(pen), color(color) {
    }
    void paint(QPainter* painter, QRect r, QPaintEvent* event) override {
        pen.setColor(color);
        pen.setWidth(width);
        painter->setPen(pen);
        // if (filled_color.has_value()) {
        //     painter->fillRect(r, filled_color.value());
        // }
        painter->drawRect(r);
    }
};
class Icon : public E {
public:
    SVG_Image_Render svg;
    Icon() {
        svg.set_path(":/you_jian_tou.svg").set_color(Qt::red).create();
    }
    void paint(QPainter* painter, QRect r, QPaintEvent* event) override {
        svg.render(painter, r);
    }
    [[nodiscard]] QSize sizeHint() const override {
        return {20, 20};
    }
};
class Icon2 : public E {
public:
    QIcon icon;
    Icon2(QIcon icon) : icon(icon) {
    }
    Icon2() = default;
    void paint(QPainter* painter, QRect r, QPaintEvent* event) override {
        icon.paint(painter, r);
    }
    [[nodiscard]] QSize sizeHint() const override {
        return {20, 20};
    }
};
// https://runebook.dev/zh/docs/qt/qtextlayout/draw
class Text : public E {
public:
    QFont font;
    QFontMetrics font_metrics;
    QMargins margins;
    QString text;
    QPen pen = QPen();
    Text() : font_metrics(font) {
    }
    [[nodiscard]] QSize sizeHint() const override {
        auto w = font_metrics.horizontalAdvance(text);
        auto h = font_metrics.height();
        return {w + margins.left() + margins.right(), h + margins.top() + margins.bottom()};
    }
    // TODO QTextLayout 研究一下
    void paint(QPainter* painter, QRect r, QPaintEvent* event = nullptr) override {
        int x = r.left() + margins.left();
        int y = r.top() + margins.top() + font_metrics.height();
        painter->drawText(x, y, text);
    }
};
class Button : public E {
public:
    Border border;
    Text text;
    Icon icon;
    QMargins inter_margin;
    Delegate<Mouse_Press_Event_Handler> press_event;
    QRect rect;
    Layout layout = Layout(Qt::Horizontal);
    Button() {
        layout.space = 16;
        text.text = "123456";
        icon.use_get_main_by_cros = true;
        icon.size_policy.setFlag(Cross_Expand);
        icon.size_policy.setFlag(Get_Main_By_Cross);
        layout.items.push_back(&icon);
        layout.items.push_back(&text);
    };
    void paint(QPainter* painter, QRect r, QPaintEvent* event) override {
        border.paint(painter, r, event);
        auto r_icon = icon.rect();
        auto r_text = text.rect();
        painter->setPen(QPen(Qt::blue));
        painter->drawRect(r_icon);
        painter->drawRect(r_text);
        icon.paint(painter, r_icon, event);
        text.paint(painter, r_text, event);
    }
    void event(QEvent::Type t, QEvent* e) override {
        if (t == QEvent::MouseButtonPress) {
            QMouseEvent* me = static_cast<QMouseEvent*>(e);
            if (rect.contains(me->pos())) {
                press_event.invoke(me);
            }
        }
        if (t == QEvent::Enter) {
            border.color = Qt::blue;
            update();
        }
        if (t == QEvent::Leave) {
            border.color = Qt::black;
            update();
        }
        if (t == QEvent::Resize) {
            QResizeEvent* resize = static_cast<QResizeEvent*>(e);
            layout.set_size(resize->size());
            layout.layout();
            auto r_icon = icon.rect();
            auto r_text = text.rect();
            // qDebug() << "resize" <<  r_icon << "   " << r_text;
        }
    }
};
template <typename T>
class W : public QWidget {
public:
    E* inter;
    template <typename... Args>
    W(Args&&... args) : inter(new T(std::forward<Args>(args)...)) {
    }
    bool event(QEvent* e) override {
        inter->event(e->type(), e);
        if (inter->need_update) {
            update();
            inter->need_update = false;
        }
        return QWidget::event(e);
    }
    void paintEvent(QPaintEvent* event) override {
        QPainter painter(this);
        inter->paint(&painter, rect(), event);
    }
};
} // namespace Psc