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use std::io::{ErrorKind, Write};
use tokio::sync::mpsc;use tracing_subscriber::{    fmt::{format::FmtSpan, MakeWriter},    EnvFilter,};use wasm_bindgen::{prelude::wasm_bindgen, JsValue};
/// Initialize the logger used by `@wasmer/wasix`.////// This function can only be called once. Subsequent calls will raise an/// exception.////// ## Filtering Logs////// The `filter` string can be used to tweak logging verbosity, both globally/// or on a per-module basis, and follows [the `$RUST_LOG` format][format].////// Some examples:/// - `off` - turn off all logs/// - `error`, `warn`, `info`, `debug`, `trace` - set the global log level/// - `wasmer_wasix` - enable logs for `wasmer_wasix`/// - `info,wasmer_js::package_loader=trace` - set the global log level to///   `info` and set `wasmer_js::package_loader` to `trace`/// - `wasmer_js=debug/flush` -  turns on debug logging for///   `wasmer_js` where the log message includes `flush`/// - `warn,wasmer=info,wasmer_wasix::syscalls::wasi=trace` - directives can be///   mixed arbitrarily////// When no `filter` string is provided, a useful default will be used.////// [format]: https://docs.rs/tracing-subscriber/latest/tracing_subscriber/filter/struct.EnvFilter.html#directives#[wasm_bindgen(js_name = "initializeLogger")]pub fn initialize_logger(filter: Option<String>) -> Result<(), crate::utils::Error> {    let max_level = tracing::level_filters::STATIC_MAX_LEVEL        .into_level()        .unwrap_or(tracing::Level::ERROR);
    let filter = EnvFilter::builder()        .with_regex(false)        .with_default_directive(max_level.into())        .parse_lossy(filter.unwrap_or_else(|| crate::DEFAULT_RUST_LOG.join(",")));
    tracing_subscriber::fmt::fmt()        .with_writer(ConsoleLogger::spawn())        .with_env_filter(filter)        .with_span_events(FmtSpan::CLOSE)        .without_time()        .try_init()        .map_err(|e| anyhow::anyhow!(e))?;
    Ok(())}
/// A [`std::io::Write`] implementation which will pass all messages to the main/// thread for logging with [`web_sys::console`].////// This is useful when using Web Workers for concurrency because their/// `console.log()` output isn't normally captured by test runners.#[derive(Debug)]struct ConsoleLogger {    buffer: Vec<u8>,    sender: mpsc::UnboundedSender<String>,}
impl ConsoleLogger {    fn spawn() -> impl for<'w> MakeWriter<'w> + 'static {        let (sender, mut receiver) = mpsc::unbounded_channel();
        wasm_bindgen_futures::spawn_local(async move {            while let Some(msg) = receiver.recv().await {                let js_string = JsValue::from(msg);                web_sys::console::log_1(&js_string);            }        });
        move || ConsoleLogger {            buffer: Vec::new(),            sender: sender.clone(),        }    }}
impl Write for ConsoleLogger {    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {        self.buffer.extend(buf);        Ok(buf.len())    }
    fn flush(&mut self) -> std::io::Result<()> {        let buffer = std::mem::take(&mut self.buffer);
        let text = String::from_utf8(buffer)            .map_err(|e| std::io::Error::new(ErrorKind::InvalidInput, e))?;
        self.sender            .send(text)            .map_err(|e| std::io::Error::new(ErrorKind::BrokenPipe, e))?;
        Ok(())    }}
impl Drop for ConsoleLogger {    fn drop(&mut self) {        if !self.buffer.is_empty() {            let _ = self.flush();        }    }}