#[derive(Clone, Copy, PartialEq, Eq, Default)]
pub enum OptionsFocus {
    #[default]
    ColorScheme,
    RefreshRate,
    RuntimeHighlight,
    ShowScope,
    ShowSpectrum,
    ShowCompletion,
    FlashBrightness,
    LinkEnabled,
    StartStopSync,
    Quantum,
    MidiOutput0,
    MidiOutput1,
    MidiOutput2,
    MidiOutput3,
    MidiInput0,
    MidiInput1,
    MidiInput2,
    MidiInput3,
}

#[derive(Default)]
pub struct OptionsState {
    pub focus: OptionsFocus,
}

impl OptionsState {
    pub fn next_focus(&mut self) {
        self.focus = match self.focus {
            OptionsFocus::ColorScheme => OptionsFocus::RefreshRate,
            OptionsFocus::RefreshRate => OptionsFocus::RuntimeHighlight,
            OptionsFocus::RuntimeHighlight => OptionsFocus::ShowScope,
            OptionsFocus::ShowScope => OptionsFocus::ShowSpectrum,
            OptionsFocus::ShowSpectrum => OptionsFocus::ShowCompletion,
            OptionsFocus::ShowCompletion => OptionsFocus::FlashBrightness,
            OptionsFocus::FlashBrightness => OptionsFocus::LinkEnabled,
            OptionsFocus::LinkEnabled => OptionsFocus::StartStopSync,
            OptionsFocus::StartStopSync => OptionsFocus::Quantum,
            OptionsFocus::Quantum => OptionsFocus::MidiOutput0,
            OptionsFocus::MidiOutput0 => OptionsFocus::MidiOutput1,
            OptionsFocus::MidiOutput1 => OptionsFocus::MidiOutput2,
            OptionsFocus::MidiOutput2 => OptionsFocus::MidiOutput3,
            OptionsFocus::MidiOutput3 => OptionsFocus::MidiInput0,
            OptionsFocus::MidiInput0 => OptionsFocus::MidiInput1,
            OptionsFocus::MidiInput1 => OptionsFocus::MidiInput2,
            OptionsFocus::MidiInput2 => OptionsFocus::MidiInput3,
            OptionsFocus::MidiInput3 => OptionsFocus::ColorScheme,
        };
    }

    pub fn prev_focus(&mut self) {
        self.focus = match self.focus {
            OptionsFocus::ColorScheme => OptionsFocus::MidiInput3,
            OptionsFocus::RefreshRate => OptionsFocus::ColorScheme,
            OptionsFocus::RuntimeHighlight => OptionsFocus::RefreshRate,
            OptionsFocus::ShowScope => OptionsFocus::RuntimeHighlight,
            OptionsFocus::ShowSpectrum => OptionsFocus::ShowScope,
            OptionsFocus::ShowCompletion => OptionsFocus::ShowSpectrum,
            OptionsFocus::FlashBrightness => OptionsFocus::ShowCompletion,
            OptionsFocus::LinkEnabled => OptionsFocus::FlashBrightness,
            OptionsFocus::StartStopSync => OptionsFocus::LinkEnabled,
            OptionsFocus::Quantum => OptionsFocus::StartStopSync,
            OptionsFocus::MidiOutput0 => OptionsFocus::Quantum,
            OptionsFocus::MidiOutput1 => OptionsFocus::MidiOutput0,
            OptionsFocus::MidiOutput2 => OptionsFocus::MidiOutput1,
            OptionsFocus::MidiOutput3 => OptionsFocus::MidiOutput2,
            OptionsFocus::MidiInput0 => OptionsFocus::MidiOutput3,
            OptionsFocus::MidiInput1 => OptionsFocus::MidiInput0,
            OptionsFocus::MidiInput2 => OptionsFocus::MidiInput1,
            OptionsFocus::MidiInput3 => OptionsFocus::MidiInput2,
        };
    }
}