//! L5 integration tests for the LOT C2 embedder-config adapters:
//! - [`FsEmbedderProfileStore`] driven through the [`EmbedderProfileStore`] port
//!   against a real [`LocalFileSystem`] + temp dir (round-trip, `embedder.json`
//!   persistence, delete-absent ⇒ `NotFound`),
//! - [`EmbedderEnvProbe::inspect`] without the HTTP feature (`ollama_detected`
//!   always `false`) and reflecting a prepared ONNX cache.
//!
//! No network is required. The temp-dir convention mirrors `tests/project_store.rs`
//! (`std::env::temp_dir()` + a UUID, self-cleaning on drop) — no new dependency.

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

use domain::ports::{
    EmbedderEnvInspector, EmbedderProfileStore, FileSystem, RemotePath, StoreError,
};
use domain::profile::{EmbedderProfile, EmbedderStrategy};
use infrastructure::{
    EmbedderEnvProbe, FsEmbedderProfileStore, LocalFileSystem, ONNX_CACHE_SUBDIR,
    RECOMMENDED_ONNX_MODELS, VECTOR_HTTP_ENABLED, VECTOR_ONNX_ENABLED,
};
use uuid::Uuid;

/// A unique scratch directory under the OS temp dir, cleaned up on drop.
struct TempDir(PathBuf);
impl TempDir {
    fn new() -> Self {
        let p = std::env::temp_dir().join(format!("idea-l5-embedder-{}", Uuid::new_v4()));
        std::fs::create_dir_all(&p).unwrap();
        Self(p)
    }
    fn app_data_dir(&self) -> String {
        self.0.to_string_lossy().into_owned()
    }
    fn path(&self) -> &std::path::Path {
        &self.0
    }
    fn child(&self, name: &str) -> RemotePath {
        RemotePath::new(self.0.join(name).to_string_lossy().into_owned())
    }
}
impl Drop for TempDir {
    fn drop(&mut self) {
        let _ = std::fs::remove_dir_all(&self.0);
    }
}

fn store(tmp: &TempDir) -> FsEmbedderProfileStore {
    let fs: Arc<dyn FileSystem> = Arc::new(LocalFileSystem::new());
    FsEmbedderProfileStore::new(fs, tmp.app_data_dir())
}

fn sample(id: &str, name: &str, dimension: usize) -> EmbedderProfile {
    EmbedderProfile::new(
        id,
        name,
        EmbedderStrategy::LocalOnnx,
        Some("multilingual-e5-small".to_owned()),
        None,
        None,
        dimension,
    )
    .unwrap()
}

// ---------------------------------------------------------------------------
// FsEmbedderProfileStore via the EmbedderProfileStore port
// ---------------------------------------------------------------------------

#[tokio::test]
async fn save_then_list_roundtrips() {
    let tmp = TempDir::new();
    let store: &dyn EmbedderProfileStore = &store(&tmp);

    assert!(
        store.list().await.unwrap().is_empty(),
        "no embedder.json yet ⇒ empty list"
    );

    let p = sample("local-onnx", "Local ONNX", 384);
    store.save(&p).await.unwrap();

    assert_eq!(store.list().await.unwrap(), vec![p]);
}

#[tokio::test]
async fn save_upserts_by_id_without_duplicating() {
    let tmp = TempDir::new();
    let store: &dyn EmbedderProfileStore = &store(&tmp);

    store.save(&sample("e", "before", 384)).await.unwrap();
    let updated = sample("e", "after", 768);
    store.save(&updated).await.unwrap();

    let listed = store.list().await.unwrap();
    assert_eq!(listed.len(), 1, "upsert must not duplicate by id");
    assert_eq!(listed[0], updated);
}

#[tokio::test]
async fn delete_removes_profile() {
    let tmp = TempDir::new();
    let store: &dyn EmbedderProfileStore = &store(&tmp);

    store.save(&sample("a", "A", 384)).await.unwrap();
    store.save(&sample("b", "B", 384)).await.unwrap();

    store.delete("a").await.unwrap();

    let listed = store.list().await.unwrap();
    assert_eq!(listed.len(), 1);
    assert_eq!(listed[0].id, "b");
}

#[tokio::test]
async fn delete_unknown_is_not_found() {
    let tmp = TempDir::new();
    let store: &dyn EmbedderProfileStore = &store(&tmp);
    store.save(&sample("a", "A", 384)).await.unwrap();

    let err = store
        .delete("ghost")
        .await
        .expect_err("deleting unknown id fails");
    assert!(matches!(err, StoreError::NotFound), "got {err:?}");
}

#[tokio::test]
async fn embedder_file_is_camelcase_versioned() {
    let tmp = TempDir::new();
    let store: &dyn EmbedderProfileStore = &store(&tmp);

    store
        .save(
            &EmbedderProfile::new(
                "api-openai",
                "OpenAI",
                EmbedderStrategy::Api,
                Some("text-embedding-3-small".to_owned()),
                Some("https://api.openai.com/v1/embeddings".to_owned()),
                Some("OPENAI_API_KEY".to_owned()),
                1536,
            )
            .unwrap(),
        )
        .await
        .unwrap();

    let fs = LocalFileSystem::new();
    let bytes = fs.read(&tmp.child("embedder.json")).await.unwrap();
    let json: serde_json::Value = serde_json::from_slice(&bytes).unwrap();

    assert_eq!(json["version"], 1);
    let profiles = json
        .get("profiles")
        .and_then(|v| v.as_array())
        .expect("top-level `profiles` array");
    assert_eq!(profiles.len(), 1);
    let entry = &profiles[0];
    assert_eq!(entry["id"], "api-openai");
    assert_eq!(entry["strategy"], "api");
    // camelCase field, never the secret itself.
    assert_eq!(entry["apiKeyEnv"], "OPENAI_API_KEY");
    assert!(entry.get("api_key_env").is_none(), "no snake_case leak");
    assert_eq!(entry["dimension"], 1536);
}

// ---------------------------------------------------------------------------
// EmbedderEnvProbe::inspect — pure-FS cache scan, no network
// ---------------------------------------------------------------------------

#[tokio::test]
async fn probe_empty_cache_reports_nothing() {
    let tmp = TempDir::new();
    // An ONNX cache subdir that exists but is empty ⇒ no cached models.
    let cache = tmp.path().join(ONNX_CACHE_SUBDIR);
    std::fs::create_dir_all(&cache).unwrap();

    let probe = EmbedderEnvProbe::new(cache, "http://127.0.0.1:1"); // unreachable host
    let report = probe.inspect().await;

    assert!(report.onnx_cached_models.is_empty(), "empty cache ⇒ none");
    assert!(
        !report.ollama_detected,
        "without vector-http (or with an unreachable host) ⇒ never detected"
    );
}

#[tokio::test]
async fn probe_missing_cache_dir_is_best_effort_empty() {
    // A cache dir that does not exist must not panic — best-effort ⇒ empty.
    let cache = std::env::temp_dir().join(format!("idea-no-such-cache-{}", Uuid::new_v4()));
    assert!(!cache.exists());

    let probe = EmbedderEnvProbe::new(cache, "http://127.0.0.1:1");
    let report = probe.inspect().await;

    assert!(report.onnx_cached_models.is_empty());
    assert!(!report.ollama_detected);
}

#[tokio::test]
async fn probe_detects_prepared_onnx_cache() {
    let tmp = TempDir::new();
    let cache = tmp.path().join(ONNX_CACHE_SUBDIR);
    std::fs::create_dir_all(&cache).unwrap();

    // Recreate the hf-hub-style cache layout for the recommended model:
    // a non-empty subdirectory whose name contains the model token
    // (`onnx_model_is_cached`: needle = id with `_`/`/`→`-`, lowercased).
    let model = RECOMMENDED_ONNX_MODELS
        .iter()
        .find(|m| m.recommended)
        .expect("a recommended model exists");
    let model_dir = cache.join(format!("models--intfloat--{}", model.id));
    std::fs::create_dir_all(&model_dir).unwrap();
    // Non-empty: the probe treats an empty dir as "not present".
    std::fs::write(model_dir.join("model.onnx"), b"stub").unwrap();

    let probe = EmbedderEnvProbe::new(cache, "http://127.0.0.1:1");
    let report = probe.inspect().await;

    assert_eq!(
        report.onnx_cached_models,
        vec![model.id.to_owned()],
        "the prepared cached model must be detected"
    );
    assert!(!report.ollama_detected, "no real Ollama required");
}

#[test]
fn compiled_capability_flags_match_features() {
    // The consts must mirror the build's features exactly (honest reporting to the UI).
    assert_eq!(VECTOR_HTTP_ENABLED, cfg!(feature = "vector-http"));
    assert_eq!(VECTOR_ONNX_ENABLED, cfg!(feature = "vector-onnx"));
}