//! Run with: cargo run --example live_reports
//!
//! **Read-only. Safe to run against a printer that is mid-print.**
//!
//! Connects to every Bambu printer in printers.toml, asks each one what
//! firmware it's running, then watches its `print.push_status` stream for a
//! while. Everything it sends either reads state or asks the printer to
//! re-send what it already knows:
//!
//! - `get_version`  - read-only.
//! - `pushall`      - "re-send the full status object". A request for data,
//!   not a state change. v1 only; a no-op on v2.
//! - `print_status` - reads this process's own in-memory cache, no traffic.
//!
//! It deliberately sends **no** `gcode_line`, **no** `set_fan_speed`, **no**
//! `calibration` (that one starts a physical calibration sequence and would
//! wreck a running print), no upload, and nothing that starts or stops a
//! job. Keep it that way - the whole point of this example is that it can
//! be pointed at a working printer without a second thought. Use
//! `bambu_idle_checks` for anything that writes.
//!
//! The raw payloads are the real output. `PrintReport` models only a small
//! fraction of what a real `push_status` carries (see its doc comment), so
//! this turns on the `trace`-level raw-payload log in `bambu_mqtt.rs` and
//! lets you capture the untouched JSON:
//!
//! ```sh
//! cargo run --example live_reports 2> capture.jsonl
//! ```
//!
//! Then grow `PrintReport` and `continuum-schemas`' `push_status.schema.json`
//! from what's actually in there, rather than from guesses.

use std::time::Duration;

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

/// How long to sit and watch each printer's stream before moving on.
const WATCH_FOR: Duration = Duration::from_secs(25);
/// How often to print a one-line summary of the cached report.
const POLL_EVERY: Duration = Duration::from_secs(2);
/// A printer that's switched off shouldn't hold the whole run up - the TLS
/// handshake inside `connect` has its own 5s timeout, but the MQTT half
/// doesn't, so this bounds the lot.
const CONNECT_TIMEOUT: Duration = Duration::from_secs(20);

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    // Default to trace for the raw-payload target specifically, so a plain
    // run captures payloads without needing RUST_LOG set by hand. An
    // explicit RUST_LOG still wins.
    tracing_subscriber::fmt()
        .with_env_filter(EnvFilter::try_from_default_env().unwrap_or_else(|_| {
            EnvFilter::new("info,continuum_proxy::printer::bambu_mqtt=trace")
        }))
        .with_writer(std::io::stderr)
        .init();

    let mut printers = fleet::load(std::path::Path::new("printers.toml"))?;

    // Optional: a printer id to look at just that one. No argument means the
    // whole fleet. Read-only either way, so there's nothing to guard here.
    let only: Option<String> = std::env::args().nth(1);

    for printer in &mut printers {
        if let Some(id) = &only
            && &printer.base().id != id
        {
            continue;
        }
        let PrinterHandle::Bambu(bambu) = printer else {
            println!("skipping {} - not a Bambu printer", printer.display_name());
            continue;
        };

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

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

        match bambu.get_version().await {
            Ok(version) => {
                println!("  get_version OK: {} modules", version.module.len());
                for module in &version.module {
                    println!("    {:<12} sw {:<14} hw {}", module.name, module.sw_ver, module.hw_ver);
                }
            }
            Err(err) => println!("  get_version failed: {err}"),
        }

        // v1 needs this to get a full object at all; it's a no-op on v2 (see
        // `pushall`'s doc comment). Harmless either way.
        if let Err(err) = bambu.pushall().await {
            println!("  pushall failed: {err}");
        }

        println!("  watching print.push_status for {WATCH_FOR:?}...");
        let deadline = tokio::time::Instant::now() + WATCH_FOR;
        // Keyed on the *contents*, not on `sequence_id`. v2 leaves
        // `sequence_id` pinned at one value while the report genuinely
        // changes underneath it (confirmed live - see `PrintStatusCache`),
        // so keying on it reports one update for a whole print.
        let mut last_seen: Option<String> = None;
        let mut updates = 0u32;

        while tokio::time::Instant::now() < deadline {
            tokio::time::sleep(POLL_EVERY).await;

            match bambu.print_status().await {
                Some(report) => {
                    let seq = report.envelope.sequence_id.clone();
                    let fingerprint = format!(
                        "{:?}|{:?}|{:?}|{:?}|{:?}|{:?}",
                        report.gcode_state,
                        report.mc_percent,
                        report.layer_num,
                        report.mc_remaining_time,
                        report.nozzle_temper,
                        report.bed_temper
                    );
                    let changed = last_seen.as_ref() != Some(&fingerprint);
                    if changed {
                        updates += 1;
                        last_seen = Some(fingerprint);
                    }
                    println!(
                        "    seq={seq:<6} {:<8} {:>3}%  layer {}/{}  {} min left  nozzle {:.1}/{:.1}C  bed {:.1}/{:.1}C{}",
                        report.gcode_state.as_deref().unwrap_or("?"),
                        report.mc_percent.unwrap_or(0),
                        report.layer_num.unwrap_or(0),
                        report.total_layer_num.unwrap_or(0),
                        report.mc_remaining_time.unwrap_or(0),
                        report.nozzle_temper.unwrap_or(0.0),
                        report.nozzle_target_temper.unwrap_or(0.0),
                        report.bed_temper.unwrap_or(0.0),
                        report.bed_target_temper.unwrap_or(0.0),
                        if changed { "" } else { "  (unchanged)" }
                    );
                    if let Some(job) = report.subtask_name.as_deref().filter(|s| !s.is_empty()) {
                        println!("           job: {job}");
                    }
                    if let Some(hms) = report.hms.as_ref().filter(|h| !h.is_empty()) {
                        println!("           hms: {} active entr(y/ies)", hms.len());
                    }
                    println!(
                        "           fans: cooling={} heatbreak={} big1={} big2={}  wifi={}",
                        report.cooling_fan_speed.as_deref().unwrap_or("?"),
                        report.heatbreak_fan_speed.as_deref().unwrap_or("?"),
                        report.big_fan1_speed.as_deref().unwrap_or("?"),
                        report.big_fan2_speed.as_deref().unwrap_or("?"),
                        report.wifi_signal.as_deref().unwrap_or("?")
                    );
                }
                // Reaching here now means genuinely nothing arrived. It used
                // to also mean "something arrived and failed to parse",
                // which is why a mid-print H2C once looked completely
                // silent - see `handle_incoming_report`.
                None => println!("    no push_status received yet"),
            }
        }

        println!("  {updates} distinct push_status update(s) in {WATCH_FOR:?}");
    }

    println!("\ndone - raw payloads went to stderr (redirect it to capture them)");
    Ok(())
}