//! Write/delete path ownership tests (#12).
//!
//! Verifies the ownership checks added to fix the IDOR: user A creates a
//! medication/appointment; user B cannot update, delete, log-dose-against, or
//! read adherence for it. All cross-user attempts must 404 (we use 404, not
//! 403, to avoid leaking the existence of other users' records).
//!
//! Requires a live MongoDB; skips gracefully otherwise.

mod common;

use serde_json::{json, Value};

macro_rules! require_app {
    ($app:expr) => {
        match $app {
            Some(x) => x,
            None => {
                eprintln!("[integration] skipped (MongoDB unavailable)");
                return;
            }
        }
    };
}

fn unique_email() -> String {
    format!("test_{}@example.com", uuid::Uuid::new_v4())
}

/// Register a user and return the access token.
async fn register(app: &axum::Router, email: &str) -> String {
    let (status, body) = common::send_json(
        app,
        "POST",
        "/api/auth/register",
        Some(json!({ "email": email, "username": "tester", "password": "supersecret" })),
        None,
    )
    .await;
    assert_eq!(status, 201, "register failed, body: {body}");
    body["token"].as_str().unwrap().to_string()
}

/// Create a medication as `token` and return its medication_id.
async fn create_medication(app: &axum::Router, token: &str) -> String {
    let (status, body) = common::send_json(
        app,
        "POST",
        "/api/medications",
        Some(json!({
            "profile_id": "default",
            "encrypted_data": { "data": "b3duZXItYmxvYg==", "iv": "aXZ2aXZ2aXZ2aXZ2" },
        })),
        Some(token),
    )
    .await;
    assert!(
        status == 200 || status == 201,
        "create_medication failed: {status} {body}"
    );
    body["medication_id"].as_str().unwrap().to_string()
}

/// Create an appointment as `token` and return its appointment_id.
async fn create_appointment(app: &axum::Router, token: &str) -> String {
    let (status, body) = common::send_json(
        app,
        "POST",
        "/api/appointments",
        Some(json!({
            "profile_id": "default",
            "encrypted_data": { "data": "YXBwdC1ibG9i", "iv": "aXZ2aXZ2aXZ2aXZ2" },
            "status": "upcoming",
        })),
        Some(token),
    )
    .await;
    assert!(
        status == 200 || status == 201,
        "create_appointment failed: {status} {body}"
    );
    body["appointment_id"].as_str().unwrap().to_string()
}

#[tokio::test]
async fn other_user_cannot_update_or_delete_medication() {
    let (app, db_name) = require_app!(common::app_for_test().await);
    let token_a = register(&app, &unique_email()).await;
    let token_b = register(&app, &unique_email()).await;
    let med_id = create_medication(&app, &token_a).await;

    // B cannot UPDATE A's medication.
    let (status, _body) = common::send_json(
        &app,
        "POST",
        &format!("/api/medications/{med_id}"),
        Some(json!({
            "encrypted_data": { "data": "aGFja2Vk", "iv": "aXZ2aXZ2aXZ2aXZ2" },
        })),
        Some(&token_b),
    )
    .await;
    assert_eq!(status, 404, "B must not update A's medication");

    // B cannot DELETE A's medication.
    let (status, _) = common::send_json(
        &app,
        "POST",
        &format!("/api/medications/{med_id}/delete"),
        None,
        Some(&token_b),
    )
    .await;
    assert_eq!(status, 404, "B must not delete A's medication");

    // A still sees it intact.
    let (status, _body) = common::send_json(
        &app,
        "GET",
        &format!("/api/medications/{med_id}"),
        None,
        Some(&token_a),
    )
    .await;
    assert_eq!(status, 200, "A's medication must be untouched");

    common::drop_test_db(&db_name).await;
}

#[tokio::test]
async fn other_user_cannot_log_dose_or_read_adherence_for_others_medication() {
    let (app, db_name) = require_app!(common::app_for_test().await);
    let token_a = register(&app, &unique_email()).await;
    let token_b = register(&app, &unique_email()).await;
    let med_id = create_medication(&app, &token_a).await;

    // B cannot LOG A DOSE against A's medication (would skew A's adherence).
    let (status, _body) = common::send_json(
        &app,
        "POST",
        &format!("/api/medications/{med_id}/log"),
        Some(json!({ "taken": true })),
        Some(&token_b),
    )
    .await;
    assert_eq!(status, 404, "B must not log a dose against A's medication");

    // B cannot READ A's adherence (leaks dose history).
    let (status, _body) = common::send_json(
        &app,
        "GET",
        &format!("/api/medications/{med_id}/adherence"),
        None,
        Some(&token_b),
    )
    .await;
    assert_eq!(status, 404, "B must not read A's adherence");

    // A can both (sanity).
    let (status, _body) = common::send_json(
        &app,
        "POST",
        &format!("/api/medications/{med_id}/log"),
        Some(json!({ "taken": true })),
        Some(&token_a),
    )
    .await;
    assert_eq!(status, 201, "A should be able to log a dose: {_body}");
    let (status, _body) = common::send_json(
        &app,
        "GET",
        &format!("/api/medications/{med_id}/adherence"),
        None,
        Some(&token_a),
    )
    .await;
    assert_eq!(status, 200, "A should be able to read adherence");

    common::drop_test_db(&db_name).await;
}

#[tokio::test]
async fn other_user_cannot_update_or_delete_appointment() {
    let (app, db_name) = require_app!(common::app_for_test().await);
    let token_a = register(&app, &unique_email()).await;
    let token_b = register(&app, &unique_email()).await;
    let appt_id = create_appointment(&app, &token_a).await;

    // B cannot UPDATE A's appointment.
    let (status, _body) = common::send_json(
        &app,
        "POST",
        &format!("/api/appointments/{appt_id}"),
        Some(json!({
            "encrypted_data": { "data": "aGFja2Vk", "iv": "aXZ2aXZ2aXZ2aXZ2" },
            "status": "cancelled",
        })),
        Some(&token_b),
    )
    .await;
    assert_eq!(status, 404, "B must not update A's appointment");

    // B cannot DELETE A's appointment.
    let (status, _) = common::send_json(
        &app,
        "POST",
        &format!("/api/appointments/{appt_id}/delete"),
        None,
        Some(&token_b),
    )
    .await;
    assert_eq!(status, 404, "B must not delete A's appointment");

    // A still sees it.
    let (status, _body): (u16, Value) = common::send_json(
        &app,
        "GET",
        &format!("/api/appointments/{appt_id}"),
        None,
        Some(&token_a),
    )
    .await;
    assert_eq!(status, 200, "A's appointment must be untouched");

    common::drop_test_db(&db_name).await;
}

#[tokio::test]
async fn owner_can_update_and_delete_own_medication() {
    // Sanity: the new checks must not block the legitimate owner.
    let (app, db_name) = require_app!(common::app_for_test().await);
    let token = register(&app, &unique_email()).await;
    let med_id = create_medication(&app, &token).await;

    let (status, _body) = common::send_json(
        &app,
        "POST",
        &format!("/api/medications/{med_id}"),
        Some(json!({
            "encrypted_data": { "data": "dXBkYXRlZA==", "iv": "aXZ2aXZ2aXZ2aXZ2" },
        })),
        Some(&token),
    )
    .await;
    assert_eq!(status, 200, "owner should update: {_body}");

    let (status, _) = common::send_json(
        &app,
        "POST",
        &format!("/api/medications/{med_id}/delete"),
        None,
        Some(&token),
    )
    .await;
    assert_eq!(status, 204, "owner should delete");

    common::drop_test_db(&db_name).await;
}