//! AZ-683 integration tests — POI queue + rate cap + decision-window
//! mapping exercised through the public `ScanControllerHandle` API.

use chrono::{Duration as ChronoDur, Utc};
use serde_json::json;
use uuid::Uuid;

use scan_controller::{decision_window, ScanController, SubmitOutcome, SURFACE_CAP_PER_WINDOW};
use shared::models::operator::{OperatorCommand, OperatorCommandKind};
use shared::models::poi::{Poi, VlmPipelineStatus};

fn poi(confidence: f32, mgrs: &str) -> Poi {
    Poi {
        id: Uuid::new_v4(),
        confidence,
        mgrs: mgrs.to_string(),
        class: "tank".to_string(),
        class_group: "armor".to_string(),
        source_detection_ids: vec![],
        enqueued_at: Utc::now(),
        priority: 0.0,
        decline_suppressed: false,
        vlm_status: VlmPipelineStatus::NotRequested,
        tier2_evidence: None,
        deadline: Utc::now() + ChronoDur::seconds(60),
    }
}

/// AC-1 — priority ordering through the public API.
#[tokio::test]
async fn ac1_priority_ordering_via_handle() {
    // Arrange
    let h = ScanController::new().handle();
    let p1 = poi(0.9, "1");
    let p2 = poi(0.6, "2");
    h.submit_poi_candidate(p1.clone(), 0.5).await;
    h.submit_poi_candidate(p2.clone(), 0.9).await;

    // Act
    let first = h.next_poi_for_surface().await.expect("first surface");

    // Assert — p2 (0.6 × 0.9 = 0.54) outranks p1 (0.9 × 0.5 = 0.45).
    assert_eq!(first.id, p2.id);
}

/// AC-2 — the 5/min cap holds back excess POIs.
#[tokio::test]
async fn ac2_five_per_minute_cap_via_handle() {
    // Arrange
    let h = ScanController::new().handle();
    for i in 0..10 {
        h.submit_poi_candidate(poi(0.8, &format!("m{i}")), 0.5)
            .await;
    }

    // Act
    let mut surfaced = 0;
    for _ in 0..10 {
        if h.next_poi_for_surface().await.is_some() {
            surfaced += 1;
        }
    }

    // Assert
    assert_eq!(surfaced, SURFACE_CAP_PER_WINDOW);
    assert_eq!(h.pois_in_window().await, SURFACE_CAP_PER_WINDOW);
    assert_eq!(h.poi_queue_len().await, 5);
}

/// AC-3 — decision window linear mapping is exported via the
/// `decision_window` re-export. (The pure logic is tested in unit;
/// this is the smoke test that the public function is wired up.)
#[tokio::test]
async fn ac3_decision_window_public_mapping() {
    // Assert
    assert_eq!(
        decision_window(0.40).unwrap().as_secs(),
        30,
        "floor maps to 30 s"
    );
    assert_eq!(
        decision_window(1.00).unwrap().as_secs(),
        120,
        "ceiling maps to 120 s"
    );
    assert!(decision_window(0.39).is_none(), "sub-floor returns None");
}

/// AC-4 — POIs below 40 % confidence enqueue but never surface.
#[tokio::test]
async fn ac4_below_floor_never_surfaces() {
    // Arrange
    let h = ScanController::new().handle();
    h.submit_poi_candidate(poi(0.39, "low"), 0.9).await;
    h.submit_poi_candidate(poi(0.20, "lower"), 0.9).await;

    // Act
    let surfaced = h.next_poi_for_surface().await;

    // Assert
    assert!(surfaced.is_none(), "sub-40% POIs must not surface");
    assert_eq!(h.poi_queue_len().await, 2, "POIs remain in queue");
}

/// AC-5 — timeout sweep forgets expired POIs without emitting any
/// IgnoredItem.
#[tokio::test]
async fn ac5_tick_sweep_forgets_expired_pois() {
    // Arrange — POI with an already-expired deadline.
    let h = ScanController::new().handle();
    let mut p = poi(0.8, "expired");
    p.deadline = Utc::now() - ChronoDur::seconds(1);
    h.submit_poi_candidate(p, 0.5).await;
    assert_eq!(h.poi_queue_len().await, 1);

    // Act
    h.tick().await.expect("tick");

    // Assert
    assert_eq!(h.poi_queue_len().await, 0);
    let metrics = h.metrics().await;
    assert_eq!(metrics.pois_forgotten_total, 1);
    assert_eq!(metrics.pois_declined_total, 0, "no IgnoredItem on timeout");
}

/// DeclinePoi via operator command returns a `SubmitOutcome::Declined`
/// carrying the IgnoredItem payload AZ-685 will persist.
#[tokio::test]
async fn decline_poi_via_operator_command_emits_action() {
    // Arrange
    let h = ScanController::new().handle();
    let p = poi(0.8, "decline-me");
    let id = p.id;
    h.submit_poi_candidate(p, 0.5).await;

    let cmd = OperatorCommand {
        command_id: Uuid::new_v4(),
        session_token: "s".to_string(),
        sequence_number: 1,
        issued_at_wallclock: Utc::now(),
        kind: OperatorCommandKind::DeclinePoi,
        payload: json!({ "poi_id": id.to_string() }),
        signature: vec![],
    };

    // Act
    let outcome = h.submit_operator_cmd(cmd).await.expect("decline accepted");

    // Assert
    match outcome {
        SubmitOutcome::Declined(action) => {
            assert_eq!(action.poi_id, id);
            assert_eq!(action.mgrs, "decline-me");
            assert_eq!(action.class_group, "armor");
        }
        SubmitOutcome::Accepted => panic!("decline must return Declined action"),
    }
    assert_eq!(h.poi_queue_len().await, 0);
}