//! End-to-end LSP test against a real `rust-analyzer`. Ignored by default (requires the binary
//! on PATH and is slow — RA indexes the project). Run with:
//!   cargo test -p harness-lsp --test rust_analyzer -- --ignored --nocapture

use std::time::Duration;

use harness_core::lsp::{DiagnosticsSource, Severity};
use harness_lsp::LspPool;

#[tokio::test]
#[ignore = "requires rust-analyzer on PATH; slow"]
async fn rust_analyzer_reports_a_type_error() {
    // Minimal cargo project with a deliberate type error.
    let dir = tempfile::tempdir().unwrap();
    std::fs::write(
        dir.path().join("Cargo.toml"),
        "[package]\nname = \"probe\"\nversion = \"0.1.0\"\nedition = \"2021\"\n",
    )
    .unwrap();
    std::fs::create_dir_all(dir.path().join("src")).unwrap();
    let main_rs = dir.path().join("src/main.rs");
    std::fs::write(
        &main_rs,
        "fn main() {\n    let x: i32 = \"not an integer\";\n    let _ = x;\n}\n",
    )
    .unwrap();

    let pool = LspPool::new(dir.path().to_path_buf(), vec![]);
    pool.touch(&main_rs).await;
    // Generous wait: rust-analyzer must index the workspace before it reports anything.
    let diags = pool.diagnostics(&main_rs, Duration::from_secs(60)).await;

    println!("diagnostics: {diags:#?}");
    assert!(
        diags.iter().any(|d| d.severity == Severity::Error),
        "expected at least one error diagnostic, got: {diags:?}"
    );
}