use std::{convert::Infallible, error::Error, sync::Arc};

use telegram_bot::{Api, ChatRef};

use crate::selection::{telegram::get_chat_ref, SelectorExt, TelegramSelector};

use futures::{sink::unfold, StreamExt};
use model::{EmptyModel, SampleModelExt};

mod config;
mod model;
mod selection;

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

#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
    let mut cfg = match config::Config::from(CONFIG_PATH) {
        Ok(cfg) => Ok(cfg),
        Err(_) => {
            println!(
                "Failed reading config at [{}], writing default",
                CONFIG_PATH
            );
            config::Config::default().save(CONFIG_PATH)?;
            Err(anyhow::anyhow!("Invalid configuration"))
        }
    }?;

    // let mut gpt_model = ConsoleSelector.filter(
    //     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(),
    //         ],
    //     )
    //     .into_stream()
    //     .take(10),
    // );

    let api = Arc::new(Api::new(
        std::env::var("TELEGRAM_BOT_KEY").expect("bot key not present"),
    ));

    let chat = get_chat_ref(api.clone(), None)
        .await
        .expect("could not get chat ref");

    let chat_ref = chat.lock().await.clone();

    if let ChatRef::Id(id) = chat_ref {
        cfg.chat_ref = id;
        cfg.save(CONFIG_PATH)?;
    }

    let cfg_clone = cfg.clone();
    let mut gpt_model = TelegramSelector::new(
        api,
        chat,
        Box::pin(unfold((), move |_, chat_ref| {
            let mut cfg_clone = cfg_clone.clone();
            async move {
                if let ChatRef::Id(id) = &chat_ref {
                    cfg_clone.chat_ref = id.clone();
                    let _ = cfg_clone.save(CONFIG_PATH);
                }
                Ok::<_, Infallible>(())
            }
        })),
    )
    .filter(EmptyModel.into_stream())
    .take(5);

    while let Some(Ok(sample)) = gpt_model.next().await {
        println!("{}", sample);
    }

    return Ok(());
}