use crate::prelude::*;
use super::Mixer;

impl HandleInput for Mixer {
    fn handle (&mut self, event: &Event) -> Result<(), Box<dyn Error>> {
        handle(self, event)
    }
}

pub fn handle (state: &mut Mixer, event: &Event) -> Result<(), Box<dyn Error>> {

    if let Event::Input(crossterm::event::Event::Key(event)) = event {

        match event.code {
            KeyCode::Char('c') => {
                if event.modifiers == KeyModifiers::CONTROL {
                    state.exit();
                }
            },
            KeyCode::Down => {
                state.selected_track = (state.selected_track + 1) % state.tracks.len();
                println!("{}", state.selected_track);
            },
            KeyCode::Up => {
                if state.selected_track == 0 {
                    state.selected_track = state.tracks.len() - 1;
                } else {
                    state.selected_track = state.selected_track - 1;
                }
                println!("{}", state.selected_track);
            },
            KeyCode::Left => {
                if state.selected_column == 0 {
                    state.selected_column = 6
                } else {
                    state.selected_column = state.selected_column - 1;
                }
            },
            KeyCode::Right => {
                if state.selected_column == 6 {
                    state.selected_column = 0
                } else {
                    state.selected_column = state.selected_column + 1;
                }
            },
            _ => {
                println!("\n{event:?}");
            }
        }

    }

    Ok(())
}