//! SPA serving: static assets, client-route fallback, API 404s, method
//! checks. Uses $FBNG_DIST (the dev-mode asset directory) via a tempdir so
//! the test is independent of any built frontend.

mod common;

use axum::http::StatusCode;
use common::*;

#[tokio::test]
async fn spa_fallback_and_api_guards() {
    let env = Env::new().await;
    let c = Client::new(env.app.clone());

    // Unknown /api/ endpoints get a plain 404, not the SPA page.
    let r = c.get("/api/unknown/endpoint").await;
    assert_eq!(r.status, StatusCode::NOT_FOUND);
    assert_eq!(r.text(), "unknown endpoint");

    // Non-GET to a non-API path → 405.
    let r = c
        .raw(axum::http::Method::POST, "/some/page", &[], b"x".to_vec())
        .await;
    assert_eq!(r.status, StatusCode::METHOD_NOT_ALLOWED);

    // Point the dev asset dir at a controlled tempdir.
    let dist = tempfile::tempdir().unwrap();
    std::fs::write(dist.path().join("index.html"), "DIST-INDEX").unwrap();
    std::fs::write(dist.path().join("app.css"), "body{}").unwrap();
    std::env::set_var("FBNG_DIST", dist.path());

    // Root serves index.html.
    let r = c.get("/").await;
    assert_eq!(r.status, StatusCode::OK);
    assert_eq!(r.text(), "DIST-INDEX");
    assert_eq!(r.header("content-type").as_deref(), Some("text/html"));
    assert_eq!(r.header("cache-control").as_deref(), Some("no-cache"));

    // A known asset is served with the right type.
    let r = c.get("/app.css").await;
    assert_eq!(r.status, StatusCode::OK);
    assert_eq!(r.text(), "body{}");
    assert_eq!(r.header("content-type").as_deref(), Some("text/css"));

    // Unknown paths fall back to index.html (SPA client routes, deep links).
    let r = c.get("/some/deep/client/route").await;
    assert_eq!(r.status, StatusCode::OK);
    assert_eq!(r.text(), "DIST-INDEX");
    assert_eq!(r.header("cache-control").as_deref(), Some("no-cache"));
    let r = c.get("/s/abc123token/deeper/path").await;
    assert_eq!(r.status, StatusCode::OK);
    assert_eq!(r.text(), "DIST-INDEX");

    // Now with an *empty* dist dir → the friendly "build the frontend" hint.
    let empty = tempfile::tempdir().unwrap();
    std::env::set_var("FBNG_DIST", empty.path());
    let r = c.get("/").await;
    assert_eq!(r.status, StatusCode::OK);
    assert!(r.text().contains("frontend has not been built"));

    std::env::remove_var("FBNG_DIST");
}