import os

from solo_tool.solo_tool import SoloTool

class SoloToolController:
    def __init__(self, soloTool: SoloTool):
        self._soloTool = soloTool

    def nextSong(self):
        current = self._soloTool.getCurrentSong()
        if current is None:
            self._soloTool.setSong(0)
        else: 
            self._soloTool.setSong(current + 1)

    def previousSong(self):
        current = self._soloTool.getCurrentSong()
        if current is None:
            self._soloTool.setSong(0)
        else: 
            self._soloTool.setSong(current - 1)