use std::{error::Error, process, thread, time::Duration};

use rand::Rng;

mod bot;
mod config;
mod generator;
mod model;
mod publish;

const CONFIG_PATH: &str = "bot_config.json";

fn main() -> Result<(), Box<dyn Error>> {
    let cfg = match config::Config::from(CONFIG_PATH.to_string()) {
        Ok(cfg) => cfg,
        Err(_) => {
            println!(
                "Failed reading config at [{}], writing default",
                CONFIG_PATH
            );
            match config::Config::default().save(CONFIG_PATH.to_string()) {
                Some(err) => println!("Failed writing file to {}: {}", CONFIG_PATH, err),
                None => (),
            }
            process::exit(1);
        }
    };

    let gpt_model = model::GPTSampleModel::new(
        cfg.python_path(),
        cfg.gpt_code_path(),
        vec![
            "generate_unconditional_samples.py".to_string(),
            "--model_name".to_string(),
            cfg.model_name(),
            "--temperature".to_string(),
            cfg.temperature(),
            "--top_k".to_string(),
            cfg.top_k(),
            "--nsamples".to_string(),
            "1".to_string(),
        ],
    );
    let publisher = publish::FediversePublisher::new(cfg.fediverse_base_url())?;
    let gen = generator::Generator::new(gpt_model);
    let mut bot = bot::IzzilisBot::new(gen, publisher);

    let cfg_interval = cfg.interval_seconds();
    loop {
        let wait_seconds = rand::thread_rng().gen_range(cfg_interval.min()..cfg_interval.max());
        let wait_time = Duration::from_secs(wait_seconds);
        println!("Next post is in {} seconds", wait_seconds);
        thread::sleep(wait_time);
        match bot.publish() {
            Some(err) => println!("Got error from publish: {}; continuing", err),
            None => println!("publish() call successful"),
        }
    }
}