use std::path::Path;

mod file;
mod wikipedia;
mod mastodon;
mod server;

use file::{FileError, LinksFile};
use mastodon::{Mastodon, Visibility};
use wikipedia::post_body;

async fn post_link_from_file(queue: LinksFile<'_>, backup: LinksFile<'_>, mastodon: Mastodon) {
  // get link to post
  let link_to_post = match queue.remove_first_line() {
    Ok(a) => a,
    Err(FileError::EmptyLine) => match backup.remove_first_line() {
      Ok(b) => b,
      Err(c) => panic!("{c:?}")
    },
    Err(d) => panic!("{d:?}")
  };
  // convert said link into a post status
  let post_status = post_body(link_to_post).await.unwrap();
  // post it on mastodon
  mastodon.post_text_status(post_status, Visibility::Direct).await.unwrap();
}

#[tokio::main]
async fn main() {
  dotenv::dotenv().ok();
  // let app_code = std::env::var("APP_CODE").expect("APP_CODE required.");
  let app_token = std::env::var("APP_TOKEN").expect("APP_TOKEN required.");
  let app_instance = std::env::var("APP_INSTANCE").expect("APP_INSTANCE required.");

  let queue = LinksFile::new(Path::new("queue.txt"));
  let backup = LinksFile::new(Path::new("backup.txt"));
  let mastodon = Mastodon::new(app_instance, app_token);

  let mut interval_timer = tokio::time::interval(
    chrono::Duration::minutes(10).to_std().unwrap()
  );

  loop {
    interval_timer.tick().await;
    post_link_from_file(queue, backup, mastodon.clone()).await;
  }
}