#pragma once

#include "core/domain/Project.h"

#include <QColor>
#include <QPoint>
#include <QString>
#include <QVector>

// TimelineEditorModel：把时间轴的“可视数据 + 选择状态 + 命中测试结果”从 Widget 拆出来，
// 便于支持多轨、统一交互逻辑，并降低 TimelineWidget 的复杂度。
//
// 阶段1最小实现：仅负责存储轨道视图数据与选择状态；Widget 仍自行处理鼠标事件，
// 但数据不再用固定 4 条 QVector<int> 传递。

class TimelineEditorModel final {
public:
    enum class TrackKind { Location, UserScale, Image, Visibility };

    struct KeyRef {
        TrackKind kind {TrackKind::Location};
        int frame {-1};
    };

    struct TrackView {
        TrackKind kind {TrackKind::Location};
        QString label;
        QColor color;
        QVector<int> keyframes; // sorted unique frames
    };

    void clear() {
        m_tracks.clear();
        clearSelection();
        clearInterval();
    }

    void setTracks(QVector<TrackView> tracks) { m_tracks = std::move(tracks); }
    const QVector<TrackView>& tracks() const { return m_tracks; }

    void clearSelection() { m_hasSelectedKey = false; m_selected = {}; }
    void setSelectedKey(const KeyRef& ref) { m_hasSelectedKey = (ref.frame >= 0); m_selected = ref; }
    bool hasSelectedKey() const { return m_hasSelectedKey; }
    const KeyRef& selectedKey() const { return m_selected; }

    void clearInterval() { m_selStart = -1; m_selEnd = -1; }
    void setInterval(int a, int b) {
        if (a < 0 || b < 0) { clearInterval(); return; }
        m_selStart = std::min(a, b);
        m_selEnd = std::max(a, b);
    }
    int intervalStart() const { return m_selStart; }
    int intervalEnd() const { return m_selEnd; }

private:
    QVector<TrackView> m_tracks;
    bool m_hasSelectedKey {false};
    KeyRef m_selected;
    int m_selStart {-1};
    int m_selEnd {-1};
};