#pragma once

#include <vector>
#include <utility>

#include "better_note.hpp"
#include "better_notes.hpp"
#include "special_numeric_types.hpp"
#include "src/better_timing.hpp"
#include "variant_visitor.hpp"

struct NoteAndBPMSelection {
    better::Notes notes;
    std::set<better::BPMAtBeat, better::Timing::beat_order_for_events> bpm_events;

    NoteAndBPMSelection shifted_by(Fraction offset) const;
    bool empty() const;
    void clear();
};

/*
Stores a collection of notes with times relative to the first note in the vector,
to allow pasting notes at another time in the chart by simply shifting
all the note starting times.
*/
class Clipboard {
public:
    Clipboard() = default;
    void copy(const NoteAndBPMSelection& contents);
    NoteAndBPMSelection paste(Fraction beat) const;

    bool empty() const;
private:
    NoteAndBPMSelection contents;
};