//! Integration tests for the `/web/events` SSE route.
//!
//! We test two things end-to-end:
//! 1. Without a session cookie, the route redirects to the login page
//!    (the web-auth extractor's standard rejection).
//! 2. With a valid session, the route returns a streaming response with
//!    `Content-Type: text/event-stream`.
//!
//! Actual event-filtering logic (per-user scoping, admin sees-all) is
//! covered at the unit level in `src/events.rs`; wiring the broadcast
//! channel through an HTTP test would require reading a never-ending
//! body, which these tests deliberately avoid.

use std::collections::HashMap;
use std::path::PathBuf;
use std::sync::Arc;

use axum::body::Body;
use axum::http::{Request, StatusCode, header};
use tower::util::ServiceExt;

use doctate_server::config::{Config, User};

fn unique_data_path() -> PathBuf {
    std::env::temp_dir().join(format!(
        "doctate-sse-test-{}-{}",
        std::process::id(),
        uuid::Uuid::new_v4()
    ))
}

fn make_user(slug: &str) -> User {
    User {
        slug: slug.into(),
        api_key: format!("key-{slug}"),
        // Password "s" — matches the login helper below.
        web_password: bcrypt::hash("s", 4).unwrap(),
        role: "doctor".into(),
        whisper: Default::default(),
    }
}

fn build_config(data_path: PathBuf) -> Arc<Config> {
    let users = vec![make_user("alice")];
    let api_keys: HashMap<String, String> = users
        .iter()
        .map(|u| (u.api_key.clone(), u.slug.clone()))
        .collect();
    Arc::new(Config {
        data_path,
        users,
        api_keys,
        ..Config::test_default()
    })
}

/// Log in via POST /web/login and return the resulting `session=…` cookie
/// header value. Mirrors the helper in the other integration tests.
async fn login(app: axum::Router, slug: &str) -> String {
    let body = format!("slug={slug}&password=s");
    let resp = app
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/web/login")
                .header(header::CONTENT_TYPE, "application/x-www-form-urlencoded")
                .body(Body::from(body))
                .unwrap(),
        )
        .await
        .unwrap();
    for v in resp.headers().get_all(header::SET_COOKIE).iter() {
        let s = v.to_str().unwrap();
        if let Some(pair) = s.split(';').next()
            && pair.starts_with("session=")
        {
            return pair.to_string();
        }
    }
    panic!("no session cookie after login");
}

#[tokio::test]
async fn events_without_session_redirects_to_login() {
    let config = build_config(unique_data_path());
    let app = doctate_server::create_router(config);

    let resp = app
        .oneshot(
            Request::builder()
                .method("GET")
                .uri("/web/events")
                .body(Body::empty())
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(resp.status(), StatusCode::FOUND);
    let location = resp
        .headers()
        .get(header::LOCATION)
        .and_then(|v| v.to_str().ok())
        .unwrap_or("");
    assert_eq!(location, "/web/login");
}

#[tokio::test]
async fn events_with_session_returns_sse_content_type() {
    let config = build_config(unique_data_path());
    let app = doctate_server::create_router(config);
    let cookie = login(app.clone(), "alice").await;

    let resp = app
        .oneshot(
            Request::builder()
                .method("GET")
                .uri("/web/events")
                .header(header::COOKIE, cookie)
                .body(Body::empty())
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(resp.status(), StatusCode::OK);
    let ct = resp
        .headers()
        .get(header::CONTENT_TYPE)
        .and_then(|v| v.to_str().ok())
        .unwrap_or("");
    assert!(
        ct.starts_with("text/event-stream"),
        "expected text/event-stream, got {ct:?}"
    );
}