use crate::LOCAL_IMAGE_TRANSCODING_TASKS;
use jellycache::{async_cache_file, CachePath};
use log::info;
use std::{path::Path, process::Stdio};
use tokio::{io::copy, process::Command};

pub async fn create_thumbnail(path: &Path, time: f64) -> anyhow::Result<CachePath> {
    async_cache_file("thumb", (path, time as i64), move |mut output| async move {
        let _permit = LOCAL_IMAGE_TRANSCODING_TASKS.acquire().await?;
        info!("creating thumbnail of {path:?} at {time}s",);

        let mut proc = Command::new("ffmpeg")
            .stdout(Stdio::piped())
            .args(["-ss", &format!("{time}")])
            .args(["-f", "matroska", "-i", path.to_str().unwrap()])
            .args(["-frames:v", "1"])
            .args(["-c:v", "qoi"])
            .args(["-f", "image2"])
            .args(["-update", "1"])
            .arg("pipe:1")
            .spawn()?;

        let mut stdout = proc.stdout.take().unwrap();
        copy(&mut stdout, &mut output).await?;

        proc.wait().await.unwrap().exit_ok()?;
        info!("done");
        Ok(())
    })
    .await
}