//! AZ-645 integration tests driven by `wiremock`.
//!
//! Coverage:
//! - AC-1: happy-path POST returns `Ok(MissionUpdateAck)` and the call is
//!   observable on the server side; health `last_middle_waypoint_post_status`
//!   is "ok".
//! - AC-2: a single 503 followed by a 200 succeeds on the second attempt
//!   without surfacing the transient failure.
//! - AC-3: a 500-only run exhausts the bounded budget and returns
//!   `Err(MaxRetriesExceeded)`; the error is surfaced — not swallowed — and
//!   health goes Red.

use std::time::Duration;

use mission_client::{MissionClient, MissionClientOptions, PostError};
use shared::health::HealthLevel;
use shared::models::mission::{Coordinate, MissionItem, MissionItemKind};
use uuid::Uuid;
use wiremock::matchers::{method, path};
use wiremock::{Mock, MockServer, ResponseTemplate};

fn patched_mission(mission_id: Uuid) -> mission_client::Mission {
    mission_client::Mission {
        mission_id,
        schema_version: "1.0.0".into(),
        items: vec![MissionItem {
            id: Uuid::from_u128(0xaaaa_aaaa),
            kind: MissionItemKind::Waypoint,
            at: Some(Coordinate {
                latitude: 49.1,
                longitude: 31.2,
                altitude_m: 100.0,
            }),
            region: vec![],
            cruise_speed_mps: None,
            target_classes: vec![],
        }],
        geofences: vec![],
        return_point: Coordinate {
            latitude: 49.0,
            longitude: 31.0,
            altitude_m: 0.0,
        },
    }
}

fn options_for(
    mock: &MockServer,
    post_attempts: u32,
    tmp_dir: &std::path::Path,
) -> MissionClientOptions {
    let mut o = MissionClientOptions::new(mock.uri());
    o.max_attempts = 3;
    o.post_max_attempts = post_attempts;
    o.backoff_base = Duration::from_millis(10);
    o.backoff_cap = Duration::from_millis(50);
    o.request_timeout = Duration::from_secs(2);
    o.connect_timeout = Duration::from_secs(1);
    o.state_dir = tmp_dir.to_path_buf();
    o
}

#[tokio::test]
async fn ac1_happy_path_post() {
    // Arrange
    let tmp = tempfile::tempdir().unwrap();
    let mock = MockServer::start().await;
    let mission_id = Uuid::from_u128(0x1111_1111);
    Mock::given(method("POST"))
        .and(path(format!("/missions/{mission_id}/middle-waypoint")))
        .respond_with(
            ResponseTemplate::new(200).set_body_string(
                serde_json::json!({
                    "mission_id": mission_id.to_string(),
                    "revision": 7
                })
                .to_string(),
            ),
        )
        .expect(1)
        .mount(&mock)
        .await;
    let client = MissionClient::new(options_for(&mock, 3, tmp.path())).expect("client builds");
    let h = client.handle();
    let patched = patched_mission(mission_id);

    // Act
    let ack = h
        .post_middle_waypoint(&mission_id.to_string(), &patched)
        .await
        .expect("happy POST");

    // Assert
    assert_eq!(ack.mission_id, mission_id.to_string());
    assert_eq!(ack.revision, Some(7));
    let detail = h.health().detail.unwrap_or_default();
    assert!(
        detail.contains("last_middle_waypoint_post_status=ok"),
        "health detail did not record OK: {detail}"
    );
}

#[tokio::test]
async fn ac2_transient_failure_retries() {
    // Arrange
    let tmp = tempfile::tempdir().unwrap();
    let mock = MockServer::start().await;
    let mission_id = Uuid::from_u128(0x2222_2222);
    Mock::given(method("POST"))
        .and(path(format!("/missions/{mission_id}/middle-waypoint")))
        .respond_with(ResponseTemplate::new(503))
        .up_to_n_times(1)
        .mount(&mock)
        .await;
    Mock::given(method("POST"))
        .and(path(format!("/missions/{mission_id}/middle-waypoint")))
        .respond_with(ResponseTemplate::new(200).set_body_string(
            serde_json::json!({ "mission_id": mission_id.to_string() }).to_string(),
        ))
        .mount(&mock)
        .await;
    let client = MissionClient::new(options_for(&mock, 3, tmp.path())).expect("client builds");
    let h = client.handle();

    // Act
    let ack = h
        .post_middle_waypoint(&mission_id.to_string(), &patched_mission(mission_id))
        .await
        .expect("retry succeeds");

    // Assert
    assert_eq!(ack.mission_id, mission_id.to_string());
}

#[tokio::test]
async fn ac3_cap_exhaustion_bubbles_error() {
    // Arrange
    let tmp = tempfile::tempdir().unwrap();
    let mock = MockServer::start().await;
    let mission_id = Uuid::from_u128(0x3333_3333);
    Mock::given(method("POST"))
        .and(path(format!("/missions/{mission_id}/middle-waypoint")))
        .respond_with(ResponseTemplate::new(500))
        .mount(&mock)
        .await;
    let client = MissionClient::new(options_for(&mock, 3, tmp.path())).expect("client builds");
    let h = client.handle();

    // Act
    let err = h
        .post_middle_waypoint(&mission_id.to_string(), &patched_mission(mission_id))
        .await
        .unwrap_err();

    // Assert
    match err {
        PostError::MaxRetriesExceeded {
            attempts,
            last_reason,
        } => {
            assert_eq!(attempts, 3);
            assert!(
                last_reason.contains("500"),
                "expected 500 in last_reason, got {last_reason}"
            );
        }
        other => panic!("expected MaxRetriesExceeded, got {other:?}"),
    }
    assert_eq!(h.health().level, HealthLevel::Red);
}

#[tokio::test]
async fn permanent_4xx_does_not_retry() {
    // Arrange: a 400 should not trigger retries.
    let tmp = tempfile::tempdir().unwrap();
    let mock = MockServer::start().await;
    let mission_id = Uuid::from_u128(0x4444_4444);
    let scoped = Mock::given(method("POST"))
        .and(path(format!("/missions/{mission_id}/middle-waypoint")))
        .respond_with(ResponseTemplate::new(400).set_body_string("bad request"))
        .expect(1)
        .mount_as_scoped(&mock)
        .await;
    let client = MissionClient::new(options_for(&mock, 3, tmp.path())).expect("client builds");
    let h = client.handle();

    // Act
    let err = h
        .post_middle_waypoint(&mission_id.to_string(), &patched_mission(mission_id))
        .await
        .unwrap_err();

    // Assert
    assert!(matches!(err, PostError::Permanent(_)));
    drop(scoped);
}