#pragma once

#include <QWidget>
#include <QImage>
#include <QString>
#include <QPoint>
#include <QTimer>

class QSlider;
class QPushButton;
class QLabel;
class VideoPlayerEngine;

/* Виджет отрисовки кадра (aspect-fit на чёрном фоне). */
class VideoRenderWidget : public QWidget {
    Q_OBJECT
public:
    explicit VideoRenderWidget(QWidget* parent = nullptr);
    void setFrame(const QImage& img);
    void clearFrame();

protected:
    void paintEvent(QPaintEvent* event) override;

private:
    QImage m_frame;
};

/* Отдельное окно плеера без рамки: drag-перенос, dblclick/Alt+Enter — fullscreen,
 * Esc — выход/закрытие, timeline + play/pause/close. */
class VideoPlayerWindow : public QWidget {
    Q_OBJECT
public:
    explicit VideoPlayerWindow(QWidget* parent = nullptr);
    ~VideoPlayerWindow() override;

    void playFile(const QString& path);

signals:
    void closed();

protected:
    void keyPressEvent(QKeyEvent* event) override;
    void mousePressEvent(QMouseEvent* event) override;
    void mouseMoveEvent(QMouseEvent* event) override;
    void mouseReleaseEvent(QMouseEvent* event) override;
    void mouseDoubleClickEvent(QMouseEvent* event) override;
    void closeEvent(QCloseEvent* event) override;
    void resizeEvent(QResizeEvent* event) override;
    bool eventFilter(QObject* obj, QEvent* event) override;

private slots:
    void onEngineOpened(int width, int height, qint64 durationMs, bool hasAudio);
    void onPositionChanged(qint64 ms);
    void onStateChanged(int state);
    void onError(const QString& msg);
    void onFramePresented();
    void onSliderPressed();
    void onSliderReleased();
    void onPlayPause();
    void onClose();
    void onFinished();
    void showControls();
    void hideControls();

private:
    enum ResizeMode {
        ResizeNone = 0,
        ResizeLeft, ResizeRight, ResizeTop, ResizeBottom,
        ResizeTopLeft, ResizeTopRight, ResizeBottomLeft, ResizeBottomRight
    };

    void toggleFullscreen();
    void updateTimeLabels(qint64 posMs);
    void setControlsVisible(bool visible);
    QSize fitWindowSize(int vw, int vh) const;
    ResizeMode hitTestResize(const QPoint& localPos) const;
    void updateResizeCursor(const QPoint& localPos);
    void applyResize(const QPoint& globalPos);
    void beginResize(ResizeMode m, const QPoint& globalPos);

    VideoRenderWidget* m_render = nullptr;
    QWidget* m_controls = nullptr;
    QSlider* m_slider = nullptr;
    QPushButton* m_playBtn = nullptr;
    QPushButton* m_closeBtn = nullptr;
    QLabel* m_timeLabel = nullptr;
    VideoPlayerEngine* m_engine = nullptr;

    bool m_fullscreen = false;
    bool m_sliderDragging = false;
    bool m_dragging = false;
    QPoint m_dragStart;
    QPoint m_windowStart;
    ResizeMode m_resizeMode = ResizeNone;
    QRect m_resizeStartGeom;
    QPoint m_resizeStartGlobal;
    QTimer* m_hideTimer = nullptr;
};