use std::io::Write;
use std::path::PathBuf;
use libpijul::pristine::Base32;
pub struct Http {
    pub url: String,
    pub channel: String,
    pub client: reqwest::Client,
    pub name: String,
}
impl Http {
    pub async fn download_changes(&mut self, hashes: &[libpijul::pristine::Hash], send: &mut tokio::sync::mpsc::Sender<libpijul::pristine::Hash>, path: &mut PathBuf, _full: bool) -> Result<(), anyhow::Error> {
        for c in hashes {
            libpijul::changestore::filesystem::push_filename(
                path,
                c,
            );
            std::fs::create_dir_all(&path.parent().unwrap())?;
            let mut f = std::fs::File::create(&path)?;
            libpijul::changestore::filesystem::pop_filename(path);
            let c32 = c.to_base32();
            let url = format!("{}/{}", self.url, super::DOT_DIR);
            let mut res = self.client.get(&url).query(&[("change", c32)]).send().await?;
            if !res.status().is_success() {
                return Err((crate::Error::Http {
                    status: res.status(),
                })
                           .into());
            }
            while let Some(chunk) = res.chunk().await? {
                f.write_all(&chunk)?;
            }
            if send.send(*c).await.is_err() {
                break
            }
        }
        Ok(())
    }
}