use log::info;
use transmission_rpc::types::{BasicAuth, Id, Result, Torrent, Torrents};
use transmission_rpc::TransClient;

pub struct App {
    client: TransClient,
}

impl App {
    pub fn new(url: &String, username: &String, password: &String) -> Self {
        let auth = BasicAuth {
            user: username.clone(),
            password: password.clone(),
        };
        let client = TransClient::with_auth(url.as_str(), auth);
        Self { client }
    }

    pub async fn run(mut self) -> Result<()> {
        let response = self.client.torrent_get(None, None).await;
        match response {
            Ok(res) => self.scan_files(res.arguments).await.unwrap(),
            Err(e) => println!("{}", e.to_string()),
        }

        return Ok(());
    }
    async fn scan_files(self, torrents: Torrents<Torrent>) -> Result<()> {
        let mut torrents_to_remove = Vec::new();

        for torrent in torrents.torrents {
            match (torrent.id, torrent.is_stalled) {
                (Some(id), Some(true)) => {
                    info!(
                        "processing: (id: {}, name: {})",
                        id,
                        torrent
                            .name
                            .unwrap_or("name could not be found from torrent".to_string())
                    );
                    torrents_to_remove.push(id);
                }
                _ => {
                    info!("did not fit criteria (everything is good for this torrent)");
                    continue;
                }
            }
        }

        if torrents_to_remove.len() != 0 {
            info!("cleaning up torrents");
            self.clean_up_torrents(torrents_to_remove).await;
        } else {
            info!("nothing to cleanup")
        }

        return Ok(());
    }
    async fn clean_up_torrents(mut self, torrent_ids: Vec<i64>) {
        self.client
            .torrent_remove(torrent_ids.iter().map(|ti| Id::Id(*ti)).collect(), true)
            .await
            .expect("to remove torrent");
    }
}