from collections.abc import Callable

from solo_tool.solo_tool import SoloTool

def changeSong(st: SoloTool, delta: int) -> Callable[[], None]:
    def f():
        if st.song is None:
            st.song = 0
        else:
            st.song += delta
    return f

def seekRelative(st: SoloTool, delta: float) -> Callable[[], None]:
    def f():
        st.position += delta
    return f

def positionToKeyPoint(st: SoloTool) -> Callable[[], None]:
    def f():
        st.keyPoint = st.position
    return f