use itertools::Itertools;

mod flags;
mod syn;
mod tone;

fn main() {
    let flags = flags::Flags::new();

    let mut syn = syn::Syn::new(
        flags.debug,
        flags.sound_font,
        flags.sample_rate,
    );
    // Play some tones (middle C, E, G). // 16 channels actually // 60=c 64=e 67=g //up to 128velocity though dont go below 50 tbh // 12 tones per octave
    syn.tone_on(0, tone::new("c").i32(), 127);

    play(syn, flags.sample_rate, flags.bpm, flags.smallest_note);
}

fn play(mut s: syn::Syn, sample_rate: usize, bpm: usize, smallest_note: usize) {
    let params = tinyaudio::prelude::OutputDeviceParameters {
        channels_count: 2,
        sample_rate: sample_rate,
        channel_sample_count: sample_rate / bpm * 60 / smallest_note,
    };

    let sample_count = (params.channel_sample_count) as usize;
    let mut left: Vec<f32> = vec![0_f32; sample_count];
    let mut right: Vec<f32> = vec![0_f32; sample_count];

    let _device = tinyaudio::prelude::run_output_device(params, {
        move |data| {
            s.render(&mut left[..], &mut right[..]); // put in a state of rendering the next loop of these notes
            for (i, value) in left.iter().interleave(right.iter()).enumerate() {
                data[i] = *value;
            }
        }
    })
    .unwrap();

    // Wait it out
    std::thread::sleep(std::time::Duration::from_secs(2));
}