//! End-to-end checks for Enhance (#192) against a mock ComfyUI: nothing here
//! touches a real ComfyUI, a real library or the prod DB.

use std::collections::HashMap;
use std::path::PathBuf;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::{Arc, Mutex};

use actix_web::test as awtest;
use actix_web::web::Data;
use actix_web::{App, HttpResponse, HttpServer, web};
use diesel::prelude::*;
use diesel::sql_query;
use diesel::sql_types::Text;
use diesel::sqlite::SqliteConnection;
use serde_json::{Value, json};

use super::config::{EnhanceConfig, PathMapping, PromptMode, TemplateConfig};
use super::service::EnhanceService;
use super::template::Template;
use crate::data::Claims;
use crate::database::enhance_dao::{EnhanceJobDao, SqliteEnhanceJobDao};
use crate::database::test::in_memory_db_connection;
use crate::database::{ExifDao, SqliteExifDao, SqliteVersionDao};
use crate::state::AppState;
use crate::versions::xmp::test_png::{producer_xmp, write_png};

const RESTORE: &str = include_str!("../../tests/fixtures/enhance/restore_turbo.json");
const EDIT: &str = include_str!("../../tests/fixtures/enhance/edit_turbo.json");

// ---- mock ComfyUI ---------------------------------------------------------

#[derive(Default)]
struct Mock {
    submitted: Mutex<Vec<Value>>,
    queue_running: Mutex<Vec<String>>,
    queue_pending: Mutex<Vec<String>>,
    /// prompt_id -> history entry
    history: Mutex<HashMap<String, Value>>,
    newest: Mutex<Option<Value>>,
    approve_calls: Mutex<Vec<String>>,
    approve_path: Mutex<String>,
    approve_gone: Mutex<bool>,
    free_calls: AtomicUsize,
    reject_prompts: Mutex<Option<Value>>,
    view_404: Mutex<bool>,
}

async fn start_mock() -> (Arc<Mock>, String) {
    let mock = Arc::new(Mock::default());
    let m = mock.clone();
    let server = HttpServer::new(move || {
        App::new()
            .app_data(Data::from(m.clone()))
            .route("/system_stats", web::get().to(|| async { HttpResponse::Ok().json(json!({})) }))
            .route(
                "/prompt",
                web::post().to(|m: Data<Mock>, body: web::Json<Value>| async move {
                    if let Some(err) = m.reject_prompts.lock().unwrap().clone() {
                        return HttpResponse::BadRequest().json(err);
                    }
                    let mut s = m.submitted.lock().unwrap();
                    s.push(body.into_inner());
                    let id = format!("prompt-{}", s.len());
                    m.queue_pending.lock().unwrap().push(id.clone());
                    HttpResponse::Ok().json(json!({"prompt_id": id, "number": s.len(), "node_errors": {}}))
                }),
            )
            .route(
                "/queue",
                web::get().to(|m: Data<Mock>| async move {
                    let item = |id: &String| json!([1, id, {}, {}, []]);
                    HttpResponse::Ok().json(json!({
                        "queue_running": m.queue_running.lock().unwrap().iter().map(item).collect::<Vec<_>>(),
                        "queue_pending": m.queue_pending.lock().unwrap().iter().map(item).collect::<Vec<_>>(),
                    }))
                }),
            )
            .route(
                "/history",
                web::get().to(|m: Data<Mock>| async move {
                    match m.newest.lock().unwrap().clone() {
                        Some(e) => HttpResponse::Ok().json(json!({"newest": e})),
                        None => HttpResponse::Ok().json(json!({})),
                    }
                }),
            )
            .route(
                "/history/{id}",
                web::get().to(|m: Data<Mock>, id: web::Path<String>| async move {
                    match m.history.lock().unwrap().get(id.as_str()) {
                        Some(e) => HttpResponse::Ok().json(json!({ id.as_str(): e })),
                        None => HttpResponse::Ok().json(json!({})),
                    }
                }),
            )
            .route(
                "/view",
                web::get().to(|m: Data<Mock>, q: web::Query<HashMap<String, String>>| async move {
                    if *m.view_404.lock().unwrap() {
                        return HttpResponse::NotFound().finish();
                    }
                    assert_eq!(q.get("type").map(String::as_str), Some("temp"));
                    HttpResponse::Ok()
                        .content_type("image/png")
                        .body(format!("PNG:{}", q["filename"]))
                }),
            )
            .route(
                "/imageapi/approve",
                web::post().to(|m: Data<Mock>, body: web::Json<Value>| async move {
                    if *m.approve_gone.lock().unwrap() {
                        return HttpResponse::NotFound().json(json!({"error": "no longer pending"}));
                    }
                    m.approve_calls
                        .lock()
                        .unwrap()
                        .push(body["id"].as_str().unwrap().to_string());
                    HttpResponse::Ok().json(json!({"path": m.approve_path.lock().unwrap().clone()}))
                }),
            )
            .route(
                "/free",
                web::post().to(|m: Data<Mock>, body: web::Json<Value>| async move {
                    assert_eq!(body["unload_models"], true);
                    m.free_calls.fetch_add(1, Ordering::SeqCst);
                    HttpResponse::Ok().finish()
                }),
            )
    })
    .workers(1)
    .bind(("127.0.0.1", 0))
    .unwrap();
    let addr = server.addrs()[0];
    actix_rt::spawn(server.run());
    (mock, format!("http://{addr}"))
}

fn finished_entry(pending_id: &str, ts: i64) -> Value {
    json!({
        "status": {"status_str": "success", "completed": true,
                   "messages": [["execution_start", {"timestamp": ts - 3000}], ["execution_success", {"timestamp": ts}]]},
        "outputs": {"36": {
            "images": [{"filename": format!("imageapi_pending_{pending_id}.png"), "subfolder": "", "type": "temp"}],
            "imageapi_versions": [{"id": pending_id, "saved_path": null}],
        }},
    })
}

// ---- fixture --------------------------------------------------------------

struct Fx {
    mock: Arc<Mock>,
    svc: Data<EnhanceService>,
    state: Data<AppState>,
    exif: Data<Mutex<Box<dyn ExifDao>>>,
    conn: Arc<Mutex<SqliteConnection>>,
    root: PathBuf,
}

fn template(name: &str, mode: PromptMode, json: &str) -> Template {
    Template::from_value(
        TemplateConfig {
            name: name.into(),
            label: name.to_uppercase(),
            description: format!("the {name} template"),
            file: "x.json".into(),
            prompt_mode: mode,
            prompt_join: " ".into(),
            output_megapixels: 1.0,
        },
        serde_json::from_str(json).unwrap(),
    )
    .unwrap()
}

async fn fx_with(url: Option<String>, tweak: impl FnOnce(&mut EnhanceConfig)) -> Fx {
    let (mock, mock_url) = start_mock().await;
    let mut state = AppState::test_state();
    let conn = Arc::new(Mutex::new(in_memory_db_connection()));
    state.version_dao = Arc::new(Mutex::new(Box::new(SqliteVersionDao::from_shared(
        conn.clone(),
    ))));
    let library = state.primary_library().clone();
    let root = PathBuf::from(&library.root_path);
    sql_query("UPDATE libraries SET root_path = ? WHERE id = 1")
        .bind::<Text, _>(&library.root_path)
        .execute(&mut *conn.lock().unwrap())
        .unwrap();

    let mut cfg = EnhanceConfig {
        url: Some(url.unwrap_or(mock_url)),
        path_map: vec![PathMapping {
            from: format!("{}/", library.root_path),
            to: "Z:\\".into(),
        }],
        ..EnhanceConfig::default()
    };
    tweak(&mut cfg);
    let dao: Arc<Mutex<Box<dyn EnhanceJobDao>>> = Arc::new(Mutex::new(Box::new(
        SqliteEnhanceJobDao::from_shared(conn.clone()),
    )));
    let svc = EnhanceService::new(
        cfg,
        vec![
            template("restore", PromptMode::Append, RESTORE),
            template("edit", PromptMode::Replace, EDIT),
        ],
        dao,
    )
    .unwrap();
    Fx {
        mock,
        svc: Data::new(svc),
        exif: Data::new(Mutex::new(
            Box::new(SqliteExifDao::from_shared(conn.clone())) as Box<dyn ExifDao>,
        )),
        state: Data::new(state),
        conn,
        root,
    }
}

async fn fx() -> Fx {
    fx_with(None, |_| {}).await
}

impl Fx {
    fn put(&self, rel: &str, bytes: &[u8]) -> String {
        let abs = self.root.join(rel);
        std::fs::create_dir_all(abs.parent().unwrap()).unwrap();
        std::fs::write(&abs, bytes).unwrap();
        self.register(rel)
    }

    fn register(&self, rel: &str) -> String {
        let hash = crate::content_hash::compute(&self.root.join(rel))
            .unwrap()
            .content_hash;
        sql_query(
            "INSERT INTO image_exif (library_id, rel_path, created_time, last_modified, content_hash) \
             VALUES (1, ?, 0, 0, ?)",
        )
        .bind::<Text, _>(rel)
        .bind::<Text, _>(&hash)
        .execute(&mut *self.conn.lock().unwrap())
        .unwrap();
        hash
    }

    fn token() -> String {
        jsonwebtoken::encode(
            &jsonwebtoken::Header::default(),
            &Claims::valid_user("1".to_string()),
            &jsonwebtoken::EncodingKey::from_secret(b"test_key"),
        )
        .unwrap()
    }

    async fn call(&self, method: &str, uri: &str, body: Option<Value>) -> (u16, Value, Vec<u8>) {
        let app = awtest::init_service(
            App::new()
                .service(super::get_templates)
                .service(super::submit)
                .service(super::list_jobs)
                .service(super::get_job)
                .service(super::preview)
                .service(super::approve)
                .service(super::discard)
                .service(crate::versions::get_versions)
                .app_data(self.svc.clone())
                .app_data(self.state.clone())
                .app_data(self.exif.clone()),
        )
        .await;
        let mut req = match method {
            "POST" => awtest::TestRequest::post(),
            _ => awtest::TestRequest::get(),
        }
        .uri(uri)
        .insert_header(("Authorization", format!("Bearer {}", Fx::token())));
        if let Some(b) = body {
            req = req.set_json(b);
        }
        let resp = awtest::call_service(&app, req.to_request()).await;
        let status = resp.status().as_u16();
        let bytes = awtest::read_body(resp).await.to_vec();
        let json = serde_json::from_slice(&bytes).unwrap_or(Value::Null);
        (status, json, bytes)
    }
}

async fn call(fx: &Fx, method: &str, uri: &str, body: Option<Value>) -> (u16, Value, Vec<u8>) {
    fx.call(method, uri, body).await
}

const PHOTO: &str = "2009_200/019_19.JPG";

// ---- tests ----------------------------------------------------------------

#[actix_rt::test]
async fn templates_report_availability_and_shape() {
    let fx = fx().await;
    let (st, body, _) = call(&fx, "GET", "/enhance/templates", None).await;
    assert_eq!(st, 200);
    assert_eq!(body["available"], true);
    assert!(body.get("reason").is_none());
    assert_eq!(body["default"], "restore");
    let t = &body["templates"];
    assert_eq!(t[0]["name"], "restore");
    assert_eq!(t[0]["label"], "RESTORE");
    assert_eq!(t[0]["accepts_prompt"], true);
    assert_eq!(t[0]["prompt_mode"], "append");
    assert_eq!(t[0]["prompt_required"], false);
    assert_eq!(t[0]["accepts_reference"], false);
    assert_eq!(t[0]["default"], true);
    assert_eq!(t[0]["output_megapixels"], 1.0);
    assert_eq!(t[0]["warn_above_megapixels"], 1.5);
    assert_eq!(t[1]["name"], "edit");
    assert_eq!(t[1]["prompt_mode"], "replace");
    assert_eq!(t[1]["prompt_required"], true);
    assert_eq!(t[1]["accepts_reference"], true);
    assert_eq!(t[1]["default"], false);
}

#[actix_rt::test]
async fn comfy_down_means_unavailable_and_a_clear_submit_error() {
    // Nothing listens on port 9 (discard) of loopback.
    let fx = fx_with(Some("http://127.0.0.1:9".into()), |_| {}).await;
    fx.put(PHOTO, b"photo");
    let (st, body, _) = call(&fx, "GET", "/enhance/templates", None).await;
    assert_eq!(st, 200);
    assert_eq!(body["available"], false);
    assert_eq!(body["reason"], "ComfyUI isn't running");
    assert_eq!(body["templates"].as_array().unwrap().len(), 2);

    let (st, body, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    assert_eq!(st, 503);
    assert_eq!(body["error"], "ComfyUI isn't running");
    assert_eq!(body["code"], "unavailable");
}

#[actix_rt::test]
async fn unconfigured_enhance_is_off_not_an_error() {
    let fx = fx_with(None, |c| c.url = None).await;
    let (st, body, _) = call(&fx, "GET", "/enhance/templates", None).await;
    assert_eq!((st, &body["available"]), (200, &json!(false)));
    let (st, _, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    assert_eq!(st, 503);
}

#[actix_rt::test]
async fn submit_maps_the_path_and_uses_a_fresh_seed_each_time() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    let body = json!({"path": PHOTO, "template": "restore", "prompt": " warmer colours "});
    let (st, job1, _) = call(&fx, "POST", "/enhance", Some(body.clone())).await;
    assert_eq!(st, 200, "{job1}");
    let (_, job2, _) = call(&fx, "POST", "/enhance", Some(body)).await;

    assert_eq!(job1["status"], "queued");
    assert_eq!(job1["path"], PHOTO);
    assert_eq!(job1["template"], "restore");
    assert_eq!(job1["prompt"], "warmer colours");
    assert_eq!(job1["pending"], json!([]));
    assert!(job1["created_at"].as_i64().unwrap() > 0);
    assert_ne!(job1["id"], job2["id"]);

    let sent = fx.mock.submitted.lock().unwrap();
    assert_eq!(sent.len(), 2);
    let p1 = &sent[0]["prompt"];
    let p2 = &sent[1]["prompt"];
    assert_eq!(p1["37"]["inputs"]["path"], "Z:\\2009_200\\019_19.JPG");
    assert_eq!(p1["36"]["inputs"]["require_approval"], true);
    assert!(
        p1["13"]["inputs"]["value"]
            .as_str()
            .unwrap()
            .ends_with("overlays. warmer colours")
    );
    assert_ne!(p1["5"]["inputs"]["seed"], p2["5"]["inputs"]["seed"]);
    assert_ne!(
        p1["14"]["inputs"]["sampling_mode.seed"],
        p2["14"]["inputs"]["sampling_mode.seed"]
    );
    assert_eq!(sent[0]["client_id"], "imageapi");
}

#[actix_rt::test]
async fn submit_validation() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    // Edit needs an instruction.
    let (st, body, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "edit"})),
    )
    .await;
    assert_eq!(st, 400, "{body}");
    assert!(body["error"].as_str().unwrap().contains("instruction"));
    let (st, _, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "edit", "prompt": "  "})),
    )
    .await;
    assert_eq!(st, 400);
    // Unknown template / photo / traversal / reference on a template without one.
    let (st, _, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "nope"})),
    )
    .await;
    assert_eq!(st, 404);
    let (st, _, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": "missing.jpg", "template": "restore"})),
    )
    .await;
    assert_eq!(st, 404);
    let (st, _, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": "../etc/passwd", "template": "restore"})),
    )
    .await;
    assert_eq!(st, 400);
    fx.put("ref.jpg", b"other");
    let (st, _, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore", "reference_path": "ref.jpg"})),
    )
    .await;
    assert_eq!(st, 400);
    assert!(
        fx.mock.submitted.lock().unwrap().is_empty(),
        "nothing reached ComfyUI"
    );
}

#[actix_rt::test]
async fn edit_without_reference_drops_the_node_and_with_one_keeps_it() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    fx.put("ref/other.jpg", b"other view");
    let (st, _, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "edit", "prompt": "make it b&w"})),
    )
    .await;
    assert_eq!(st, 200);
    let (st, job, _) = call(
        &fx, "POST", "/enhance",
        Some(json!({"path": PHOTO, "template": "edit", "prompt": "x", "reference_path": "ref/other.jpg"})),
    )
    .await;
    assert_eq!(st, 200);
    assert_eq!(job["reference_path"], "ref/other.jpg");
    let sent = fx.mock.submitted.lock().unwrap();
    let without = &sent[0]["prompt"];
    assert!(without.get("38").is_none());
    assert!(!without.to_string().contains("[\"38\""));
    assert_eq!(without["13"]["inputs"]["value"], "make it b&w");
    let with = &sent[1]["prompt"];
    assert_eq!(with["38"]["inputs"]["path"], "Z:\\ref\\other.jpg");
}

#[actix_rt::test]
async fn comfy_rejection_is_reported_and_a_missing_reference_is_named() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    *fx.mock.reject_prompts.lock().unwrap() = Some(json!({
        "error": {"type": "prompt_outputs_failed_validation", "message": "Prompt outputs failed validation", "details": ""},
        "node_errors": {"36": {"class_type": "ImageApiSaveImageVersion", "errors": [{"message": "Required input is missing"}]}},
    }));
    let (st, body, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "edit", "prompt": "x"})),
    )
    .await;
    assert_eq!(st, 422);
    assert!(
        body["error"]
            .as_str()
            .unwrap()
            .contains("needs a reference photo"),
        "{body}"
    );
    // Restore never dropped a reference, so the message is ComfyUI's own.
    let (st, body, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    assert_eq!(st, 422);
    assert!(!body["error"].as_str().unwrap().contains("reference"));
    assert!(
        body["error"]
            .as_str()
            .unwrap()
            .contains("Required input is missing")
    );
}

#[actix_rt::test]
async fn job_moves_queued_running_ready_and_the_preview_is_relayed() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    let (_, job, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    let id = job["id"].as_str().unwrap().to_string();

    // Behind someone else's run: queued with a position.
    fx.mock.queue_running.lock().unwrap().push("other".into());
    fx.svc.poll_once().await;
    let (_, j, _) = call(&fx, "GET", &format!("/enhance/jobs/{id}"), None).await;
    assert_eq!(
        (j["status"].as_str().unwrap(), j["queue_position"].as_i64()),
        ("queued", Some(1))
    );

    // Now it runs.
    *fx.mock.queue_running.lock().unwrap() = vec!["prompt-1".into()];
    fx.mock.queue_pending.lock().unwrap().clear();
    fx.svc.poll_once().await;
    let (_, j, _) = call(&fx, "GET", &format!("/enhance/jobs/{id}"), None).await;
    assert_eq!(j["status"], "running");

    // And finishes.
    fx.mock.queue_running.lock().unwrap().clear();
    fx.mock
        .history
        .lock()
        .unwrap()
        .insert("prompt-1".into(), finished_entry("abc", 10_000));
    fx.svc.poll_once().await;
    let (_, j, _) = call(&fx, "GET", &format!("/enhance/jobs/{id}"), None).await;
    assert_eq!(j["status"], "ready");
    assert!(j.get("queue_position").is_none());
    assert_eq!(j["pending"].as_array().unwrap().len(), 1);
    assert_eq!(j["pending"][0]["n"], 0);
    assert_eq!(j["pending"][0]["approved"], false);
    // The staged file name is ComfyUI-internal and not exposed.
    assert!(!j.to_string().contains("imageapi_pending"));

    let uri = j["pending"][0]["preview"].as_str().unwrap().to_string();
    let (st, _, bytes) = call(&fx, "GET", &uri, None).await;
    assert_eq!(st, 200);
    assert_eq!(bytes, b"PNG:imageapi_pending_abc.png");
    let (st, _, _) = call(&fx, "GET", &format!("/enhance/jobs/{id}/preview/5"), None).await;
    assert_eq!(st, 404);

    // The photo's job list shows it (and a failed one too).
    let (_, list, _) = call(&fx, "GET", &format!("/enhance/jobs?path={PHOTO}"), None).await;
    assert_eq!(list["jobs"].as_array().unwrap().len(), 1);
    assert_eq!(list["jobs"][0]["id"], id.as_str());
}

#[actix_rt::test]
async fn failed_run_reports_comfys_message() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    let (_, job, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    fx.mock.queue_pending.lock().unwrap().clear();
    fx.mock.history.lock().unwrap().insert(
        "prompt-1".into(),
        json!({"status": {"status_str": "error", "completed": false, "messages": [
            ["execution_error", {"exception_message": "CUDA out of memory\n", "timestamp": 5}]]}, "outputs": {}}),
    );
    fx.svc.poll_once().await;
    let (_, j, _) = call(
        &fx,
        "GET",
        &format!("/enhance/jobs/{}", job["id"].as_str().unwrap()),
        None,
    )
    .await;
    assert_eq!(j["status"], "failed");
    assert_eq!(j["error"], "CUDA out of memory");
}

#[actix_rt::test]
async fn a_job_comfy_forgot_expires() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    let (_, job, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    // ComfyUI restarted: empty queue, empty history.
    fx.mock.queue_pending.lock().unwrap().clear();
    fx.svc.poll_once().await;
    let (_, j, _) = call(
        &fx,
        "GET",
        &format!("/enhance/jobs/{}", job["id"].as_str().unwrap()),
        None,
    )
    .await;
    assert_eq!(j["status"], "expired");
    assert!(j["error"].as_str().unwrap().contains("restarted"));
    assert_eq!(j["pending"], json!([]));
}

#[actix_rt::test]
async fn ready_job_expires_when_the_preview_is_gone_and_approve_says_so() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    let (_, job, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    let id = job["id"].as_str().unwrap().to_string();
    fx.mock.queue_pending.lock().unwrap().clear();
    fx.mock
        .history
        .lock()
        .unwrap()
        .insert("prompt-1".into(), finished_entry("abc", 1));
    fx.svc.poll_once().await;

    *fx.mock.view_404.lock().unwrap() = true;
    let (st, body, _) = call(&fx, "GET", &format!("/enhance/jobs/{id}/preview/0"), None).await;
    assert_eq!((st, body["code"].as_str()), (410, Some("expired")));
    let (_, j, _) = call(&fx, "GET", &format!("/enhance/jobs/{id}"), None).await;
    assert_eq!(j["status"], "expired");

    let (st, _, _) = call(
        &fx,
        "POST",
        &format!("/enhance/jobs/{id}/approve"),
        Some(json!({"n": 0})),
    )
    .await;
    assert_eq!(st, 410);
    assert!(fx.mock.approve_calls.lock().unwrap().is_empty());
}

#[actix_rt::test]
async fn approve_gone_on_comfy_side_expires_the_job() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    let (_, job, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    let id = job["id"].as_str().unwrap().to_string();
    fx.mock.queue_pending.lock().unwrap().clear();
    fx.mock
        .history
        .lock()
        .unwrap()
        .insert("prompt-1".into(), finished_entry("abc", 1));
    fx.svc.poll_once().await;
    *fx.mock.approve_gone.lock().unwrap() = true;
    let (st, _, _) = call(
        &fx,
        "POST",
        &format!("/enhance/jobs/{id}/approve"),
        Some(json!({"n": 0})),
    )
    .await;
    assert_eq!(st, 410);
    let (_, j, _) = call(&fx, "GET", &format!("/enhance/jobs/{id}"), None).await;
    assert_eq!(j["status"], "expired");
}

#[actix_rt::test]
async fn approve_ingests_links_and_is_idempotent() {
    let fx = fx().await;
    let original = fx.put(PHOTO, b"the original photo");
    let (_, job, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    let id = job["id"].as_str().unwrap().to_string();
    fx.mock.queue_pending.lock().unwrap().clear();
    fx.mock
        .history
        .lock()
        .unwrap()
        .insert("prompt-1".into(), finished_entry("abc", 1));
    fx.svc.poll_once().await;

    // What ComfyUI's approve would have written: a PNG with the XMP link.
    let saved_rel = "2009_200/aiedits/019_19.JPG.restored.png";
    let xmp = producer_xmp(&original, "restored", &[]);
    write_png(&fx.root.join(saved_rel), Some(&xmp), None, 7);
    *fx.mock.approve_path.lock().unwrap() = "Z:\\2009_200\\aiedits\\019_19.JPG.restored.png".into();

    let (st, v, _) = call(
        &fx,
        "POST",
        &format!("/enhance/jobs/{id}/approve"),
        Some(json!({"n": 0})),
    )
    .await;
    assert_eq!(st, 200, "{v}");
    assert_eq!(v["path"], saved_rel);
    assert_eq!(v["library_id"], 1);
    assert_eq!(v["kind"], "restored");
    assert_eq!(v["source"], "xmp");
    for k in ["hash", "created_at", "references", "width", "height"] {
        assert!(v.get(k).is_some(), "missing {k}: {v}");
    }
    assert_eq!(fx.mock.approve_calls.lock().unwrap().as_slice(), ["abc"]);

    // Visible in /image/versions right away.
    let (_, vs, _) = call(&fx, "GET", &format!("/image/versions?path={PHOTO}"), None).await;
    assert_eq!(vs["versions"].as_array().unwrap().len(), 1);
    assert_eq!(vs["versions"][0]["path"], saved_rel);

    // Approving again: same version, ComfyUI not asked, no duplicate row.
    let (st, v2, _) = call(
        &fx,
        "POST",
        &format!("/enhance/jobs/{id}/approve"),
        Some(json!({"n": 0})),
    )
    .await;
    assert_eq!(st, 200);
    assert_eq!(v2["hash"], v["hash"]);
    assert_eq!(fx.mock.approve_calls.lock().unwrap().len(), 1);
    let (_, vs, _) = call(&fx, "GET", &format!("/image/versions?path={PHOTO}"), None).await;
    assert_eq!(vs["versions"].as_array().unwrap().len(), 1);
    let rows: i64 = {
        #[derive(QueryableByName)]
        struct N {
            #[diesel(sql_type = diesel::sql_types::BigInt)]
            n: i64,
        }
        sql_query("SELECT COUNT(*) AS n FROM image_exif WHERE rel_path = ?")
            .bind::<Text, _>(saved_rel)
            .get_result::<N>(&mut *fx.conn.lock().unwrap())
            .unwrap()
            .n
    };
    assert_eq!(rows, 1);

    let (_, j, _) = call(&fx, "GET", &format!("/enhance/jobs/{id}"), None).await;
    assert_eq!(j["status"], "approved");
    assert_eq!(j["pending"][0]["approved"], true);
    assert_eq!(j["saved"][0]["path"], saved_rel);
}

#[actix_rt::test]
async fn approve_of_a_path_outside_every_library_is_reported_not_lost() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    let (_, job, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    let id = job["id"].as_str().unwrap().to_string();
    fx.mock.queue_pending.lock().unwrap().clear();
    fx.mock
        .history
        .lock()
        .unwrap()
        .insert("prompt-1".into(), finished_entry("abc", 1));
    fx.svc.poll_once().await;
    *fx.mock.approve_path.lock().unwrap() = "C:\\somewhere\\else.png".into();
    let (st, body, _) = call(
        &fx,
        "POST",
        &format!("/enhance/jobs/{id}/approve"),
        Some(json!({"n": 0})),
    )
    .await;
    assert_eq!(st, 502);
    assert!(
        body["error"]
            .as_str()
            .unwrap()
            .contains("C:\\somewhere\\else.png")
    );
}

#[actix_rt::test]
async fn approve_before_ready_is_a_400() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    let (_, job, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    let (st, _, _) = call(
        &fx,
        "POST",
        &format!("/enhance/jobs/{}/approve", job["id"].as_str().unwrap()),
        Some(json!({"n": 0})),
    )
    .await;
    assert_eq!(st, 400);
    let (st, _, _) = call(
        &fx,
        "POST",
        "/enhance/jobs/nope/approve",
        Some(json!({"n": 0})),
    )
    .await;
    assert_eq!(st, 404);
}

#[actix_rt::test]
async fn discard_hides_the_job_from_the_photo_list_only() {
    let fx = fx().await;
    fx.put(PHOTO, b"photo");
    let (_, a, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    let (_, b, _) = call(
        &fx,
        "POST",
        "/enhance",
        Some(json!({"path": PHOTO, "template": "restore"})),
    )
    .await;
    let (st, _, _) = call(
        &fx,
        "POST",
        &format!("/enhance/jobs/{}/discard", a["id"].as_str().unwrap()),
        None,
    )
    .await;
    assert_eq!(st, 200);
    let (_, list, _) = call(&fx, "GET", &format!("/enhance/jobs?path={PHOTO}"), None).await;
    let ids: Vec<&str> = list["jobs"]
        .as_array()
        .unwrap()
        .iter()
        .map(|j| j["id"].as_str().unwrap())
        .collect();
    assert_eq!(ids, [b["id"].as_str().unwrap()]);
    // Still fetchable by id.
    let (st, _, _) = call(
        &fx,
        "GET",
        &format!("/enhance/jobs/{}", a["id"].as_str().unwrap()),
        None,
    )
    .await;
    assert_eq!(st, 200);
    let (st, _, _) = call(&fx, "POST", "/enhance/jobs/nope/discard", None).await;
    assert_eq!(st, 404);
}

#[actix_rt::test]
async fn unreachable_active_jobs_become_unavailable_after_the_grace_period() {
    // Submit against the mock, then point nothing at it: use a service whose
    // client targets a dead port but whose DB holds an active job.
    let fx = fx_with(Some("http://127.0.0.1:9".into()), |c| {
        c.unreachable_grace_secs = 1
    })
    .await;
    let now = chrono::Utc::now().timestamp();
    let dao_job = crate::database::enhance_dao::EnhanceJobRow {
        id: "j1".into(),
        original_hash: "h".into(),
        library_id: 1,
        rel_path: "a.jpg".into(),
        template: "restore".into(),
        prompt: None,
        reference_hash: None,
        reference_path: None,
        comfy_prompt_id: "p".into(),
        status: "running".into(),
        error: None,
        queue_position: None,
        pending: "[]".into(),
        saved: "[]".into(),
        discarded: 0,
        created_at: now,
        updated_at: now,
    };
    SqliteEnhanceJobDao::from_shared(fx.conn.clone())
        .insert(&dao_job)
        .unwrap();
    fx.svc.poll_once().await;
    assert_eq!(
        fx.svc.get_job("j1").unwrap().status,
        "running",
        "within grace"
    );
    tokio::time::sleep(std::time::Duration::from_millis(1100)).await;
    fx.svc.poll_once().await;
    let j = fx.svc.get_job("j1").unwrap();
    assert_eq!(j.status, "unavailable");
    assert_eq!(j.error.as_deref(), Some("ComfyUI isn't running"));
}

#[actix_rt::test]
async fn idle_comfy_is_freed_once_and_activity_rearms_it() {
    let fx = fx_with(None, |c| c.idle_free_secs = 1).await;
    *fx.mock.newest.lock().unwrap() = Some(finished_entry("x", 100));
    fx.svc.idle_check().await; // baseline
    assert_eq!(fx.mock.free_calls.load(Ordering::SeqCst), 0);
    tokio::time::sleep(std::time::Duration::from_millis(1100)).await;
    fx.svc.idle_check().await;
    fx.svc.idle_check().await;
    assert_eq!(
        fx.mock.free_calls.load(Ordering::SeqCst),
        1,
        "freed exactly once"
    );

    // Someone runs a workflow in ComfyUI's own page: newest history changes.
    *fx.mock.newest.lock().unwrap() = Some(finished_entry("y", 200));
    fx.svc.idle_check().await;
    assert_eq!(fx.mock.free_calls.load(Ordering::SeqCst), 1);
    tokio::time::sleep(std::time::Duration::from_millis(1100)).await;
    fx.svc.idle_check().await;
    assert_eq!(fx.mock.free_calls.load(Ordering::SeqCst), 2);
}

#[actix_rt::test]
async fn busy_queue_blocks_the_free() {
    let fx = fx_with(None, |c| c.idle_free_secs = 1).await;
    fx.mock.queue_running.lock().unwrap().push("someone".into());
    fx.svc.idle_check().await;
    tokio::time::sleep(std::time::Duration::from_millis(1100)).await;
    fx.svc.idle_check().await;
    assert_eq!(fx.mock.free_calls.load(Ordering::SeqCst), 0);
}