//! Run with: cargo run --example bambu_cache_list -- <printer-id> [dir]
//!
//! `dir` defaults to `cache`; pass `/` to see the SD card root, which is
//! how to find out what a file's real absolute path is.
//!
//! **Read-only.** Connects, reads one `print.push_status`, and lists the
//! printer's `cache/` directory over FTPS. It sends no commands that change
//! anything - the `pushall` it issues is a request for a status report, which
//! is the one write-shaped thing a read-only tool has to do on a v1 printer
//! to learn anything at all.
//!
//! The point of it: `start_uploaded_file` can only print a file that is
//! already in `cache/`, so this answers "is there anything there, and what is
//! it called?" before any print command is sent. It is also how to find a
//! real slicer-produced `.3mf` to test that command against, which is worth
//! a great deal more than a hand-built one - if a hand-built file fails there
//! is no way to tell whether the command was wrong or the file was.

use std::time::Duration;

use continuum_proxy::fleet;
use continuum_proxy::printer::{GenericPrinter, PrinterHandle};

const CONNECT_TIMEOUT: Duration = Duration::from_secs(20);
const STATUS_TIMEOUT: Duration = Duration::from_secs(15);

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let Some(target) = std::env::args().nth(1) else {
        anyhow::bail!("usage: cargo run --example bambu_cache_list -- <printer-id> [dir]");
    };
    let dir = std::env::args().nth(2).unwrap_or_else(|| "cache".to_string());

    let mut printers = fleet::load(std::path::Path::new("printers.toml"))?;
    let printer = printers
        .iter_mut()
        .find(|p| p.base().id == target)
        .ok_or_else(|| anyhow::anyhow!("no printer with id '{target}' in printers.toml"))?;

    let PrinterHandle::Bambu(bambu) = printer else {
        anyhow::bail!("'{target}' is not a Bambu printer - this example is Bambu-specific");
    };

    println!("=== {} ===", bambu.display_name());

    match tokio::time::timeout(CONNECT_TIMEOUT, bambu.connect()).await {
        Ok(Ok(())) => {}
        Ok(Err(err)) => anyhow::bail!("connect failed: {err}"),
        Err(_) => anyhow::bail!("connect timed out - printer off or unreachable?"),
    }

    bambu.pushall().await.ok();

    let deadline = tokio::time::Instant::now() + STATUS_TIMEOUT;
    loop {
        if let Some(report) = bambu.print_status().await {
            if let Some(state) = report.gcode_state.clone() {
                println!("  gcode_state:   {state}");
                println!("  subtask_name:  {}", report.subtask_name.clone().unwrap_or_default());
                println!(
                    "  layer:         {}/{}",
                    report.layer_num.unwrap_or_default(),
                    report.total_layer_num.unwrap_or_default()
                );
                println!("  percent:       {}", report.mc_percent.unwrap_or_default());
                break;
            }
        }
        if tokio::time::Instant::now() >= deadline {
            println!("  (no gcode_state within {STATUS_TIMEOUT:?} - listing cache/ anyway)");
            break;
        }
        tokio::time::sleep(Duration::from_millis(500)).await;
    }

    println!("\n  {dir} over FTPS:");
    match bambu.list_dir(&dir).await {
        Ok(entries) if entries.is_empty() => println!("    (empty)"),
        Ok(entries) => {
            for entry in &entries {
                println!("    {entry}");
            }
            println!("\n  {} entr(ies)", entries.len());
        }
        Err(err) => println!("    FAILED: {err}"),
    }

    Ok(())
}