claw-vector 0.1.2

// engine.rs — VectorEngine: public entry point that unifies all subsystems.
use std::sync::Arc;

use tracing::instrument;

use crate::{
    collections::CollectionManager,
    config::VectorConfig,
    embeddings::{EmbeddingClient, EmbeddingProvider},
    error::VectorResult,
    search::{AnnSearcher, HybridSearcher},
    store::VectorStore,
    types::{
        Collection, DistanceMetric, EngineStats, HybridQuery, SearchQuery, SearchResponse,
        VectorRecord,
    },
};

/// High-level engine that manages collections, search, and embeddings.
pub struct VectorEngine {
    /// Runtime configuration.
    pub config: VectorConfig,
    /// Collection lifecycle and persistence manager.
    pub collections: Arc<CollectionManager>,
    /// ANN search service.
    pub ann_searcher: Arc<AnnSearcher>,
    /// Hybrid vector + keyword search service.
    pub hybrid_searcher: Arc<HybridSearcher>,
    /// Embedding provider used for text ingestion and search.
    pub embedding_client: Arc<dyn EmbeddingProvider>,
}

impl VectorEngine {
    fn ensure_default_workspace_allowed(&self, operation: &str) -> VectorResult<()> {
        if self.config.require_workspace_id {
            return Err(crate::error::VectorError::Config(format!(
                "{operation} requires explicit workspace_id"
            )));
        }
        Ok(())
    }

    /// Create a new engine using the configured gRPC embedding service.
    #[instrument]
    pub async fn new(config: VectorConfig) -> VectorResult<Self> {
        let embedding_client =
            Arc::new(EmbeddingClient::new(&config).await?) as Arc<dyn EmbeddingProvider>;
        Self::with_embedding_provider(config, embedding_client).await
    }

    /// Open an engine using the default configuration.
    #[instrument]
    pub async fn open_default() -> VectorResult<Self> {
        Self::new(VectorConfig::default()).await
    }

    /// Create a new engine with a caller-supplied embedding provider.
    #[instrument(skip(embedding_client))]
    pub async fn with_embedding_provider(
        config: VectorConfig,
        embedding_client: Arc<dyn EmbeddingProvider>,
    ) -> VectorResult<Self> {
        let store = Arc::new(VectorStore::new(&config.db_path).await?);
        let collections =
            Arc::new(CollectionManager::new(config.clone(), Arc::clone(&store)).await?);
        let ann_searcher = Arc::new(AnnSearcher::new(Arc::clone(&collections)));
        let hybrid_searcher = Arc::new(HybridSearcher::new(
            Arc::clone(&ann_searcher),
            Arc::clone(&store),
        ));

        Ok(VectorEngine {
            config,
            collections,
            ann_searcher,
            hybrid_searcher,
            embedding_client,
        })
    }

    /// Create a collection with the provided dimensions and distance metric.
    #[instrument(skip(self))]
    pub async fn create_collection(
        &self,
        name: &str,
        dimensions: usize,
        distance: DistanceMetric,
    ) -> VectorResult<Collection> {
        self.ensure_default_workspace_allowed("create_collection")?;
        self.collections
            .create_collection(
                &self.config.default_workspace_id,
                name,
                dimensions,
                distance,
            )
            .await
    }

    /// Create a collection inside a specific workspace.
    #[instrument(skip(self))]
    pub async fn create_collection_in_workspace(
        &self,
        workspace_id: &str,
        name: &str,
        dimensions: usize,
        distance: DistanceMetric,
    ) -> VectorResult<Collection> {
        self.collections
            .create_collection(workspace_id, name, dimensions, distance)
            .await
    }

    /// Delete a collection and all of its persisted state.
    #[instrument(skip(self))]
    pub async fn delete_collection(&self, name: &str) -> VectorResult<()> {
        self.ensure_default_workspace_allowed("delete_collection")?;
        self.collections
            .delete_collection(&self.config.default_workspace_id, name)
            .await
    }

    /// Delete a collection inside a specific workspace.
    #[instrument(skip(self))]
    pub async fn delete_collection_in_workspace(
        &self,
        workspace_id: &str,
        name: &str,
    ) -> VectorResult<()> {
        self.collections.delete_collection(workspace_id, name).await
    }

    /// List all collections.
    #[instrument(skip(self))]
    pub async fn list_collections(&self) -> VectorResult<Vec<Collection>> {
        self.ensure_default_workspace_allowed("list_collections")?;
        self.collections
            .list_collections(&self.config.default_workspace_id)
            .await
    }

    /// List collections scoped to a workspace.
    #[instrument(skip(self))]
    pub async fn list_collections_in_workspace(
        &self,
        workspace_id: &str,
    ) -> VectorResult<Vec<Collection>> {
        self.collections.list_collections(workspace_id).await
    }

    /// Embed text, persist the record, and return its UUID.
    #[instrument(skip(self, text, metadata))]
    pub async fn upsert(
        &self,
        collection: &str,
        text: &str,
        metadata: serde_json::Value,
    ) -> VectorResult<uuid::Uuid> {
        self.ensure_default_workspace_allowed("upsert")?;
        let vector = self.embedding_client.embed_one(text).await?;
        let record = VectorRecord::new(collection, vector)
            .with_text(text.to_string())
            .with_metadata(metadata);
        self.collections
            .insert_vector(&self.config.default_workspace_id, record)
            .await
    }

    /// Embed and insert a record in a workspace-scoped collection.
    #[instrument(skip(self, text, metadata))]
    pub async fn upsert_in_workspace(
        &self,
        workspace_id: &str,
        collection: &str,
        text: &str,
        metadata: serde_json::Value,
    ) -> VectorResult<uuid::Uuid> {
        let vector = self.embedding_client.embed_one(text).await?;
        let record = VectorRecord::new(collection, vector)
            .with_text(text.to_string())
            .with_metadata(metadata);
        self.collections.insert_vector(workspace_id, record).await
    }

    /// Embed and insert multiple text records.
    #[instrument(skip(self, items))]
    pub async fn upsert_batch(
        &self,
        collection: &str,
        items: Vec<(String, serde_json::Value)>,
    ) -> VectorResult<Vec<uuid::Uuid>> {
        self.ensure_default_workspace_allowed("upsert_batch")?;
        let texts = items
            .iter()
            .map(|(text, _)| text.clone())
            .collect::<Vec<_>>();
        let embeddings = self.embedding_client.embed(texts).await?;
        let records = items
            .into_iter()
            .zip(embeddings.into_iter())
            .map(|((text, metadata), vector)| {
                VectorRecord::new(collection, vector)
                    .with_text(text)
                    .with_metadata(metadata)
            })
            .collect::<Vec<_>>();
        self.collections
            .insert_batch(&self.config.default_workspace_id, records)
            .await
    }

    /// Embed and insert multiple records in a workspace-scoped collection.
    #[instrument(skip(self, items))]
    pub async fn upsert_batch_in_workspace(
        &self,
        workspace_id: &str,
        collection: &str,
        items: Vec<(String, serde_json::Value)>,
    ) -> VectorResult<Vec<uuid::Uuid>> {
        let texts = items
            .iter()
            .map(|(text, _)| text.clone())
            .collect::<Vec<_>>();
        let embeddings = self.embedding_client.embed(texts).await?;
        let records = items
            .into_iter()
            .zip(embeddings.into_iter())
            .map(|((text, metadata), vector)| {
                VectorRecord::new(collection, vector)
                    .with_text(text)
                    .with_metadata(metadata)
            })
            .collect::<Vec<_>>();
        self.collections.insert_batch(workspace_id, records).await
    }

    /// Insert a raw vector directly.
    #[instrument(skip(self, vector, metadata))]
    pub async fn upsert_vector(
        &self,
        collection: &str,
        vector: Vec<f32>,
        metadata: serde_json::Value,
    ) -> VectorResult<uuid::Uuid> {
        self.ensure_default_workspace_allowed("upsert_vector")?;
        let record = VectorRecord::new(collection, vector).with_metadata(metadata);
        self.collections
            .insert_vector(&self.config.default_workspace_id, record)
            .await
    }

    /// Insert a raw vector directly into a workspace-scoped collection.
    #[instrument(skip(self, vector, metadata))]
    pub async fn upsert_vector_in_workspace(
        &self,
        workspace_id: &str,
        collection: &str,
        vector: Vec<f32>,
        metadata: serde_json::Value,
    ) -> VectorResult<uuid::Uuid> {
        let record = VectorRecord::new(collection, vector).with_metadata(metadata);
        self.collections.insert_vector(workspace_id, record).await
    }

    /// Execute ANN search.
    #[instrument(skip(self, query))]
    pub async fn search(&self, query: SearchQuery) -> VectorResult<SearchResponse> {
        self.ensure_default_workspace_allowed("search")?;
        self.ann_searcher.search(query).await
    }

    /// Execute ANN search scoped to a workspace.
    #[instrument(skip(self, query))]
    pub async fn search_in_workspace(
        &self,
        workspace_id: &str,
        query: SearchQuery,
    ) -> VectorResult<SearchResponse> {
        self.ann_searcher
            .search_in_workspace(workspace_id, query)
            .await
    }

    /// Execute ANN search from raw text.
    #[instrument(skip(self, text))]
    pub async fn search_text(
        &self,
        collection: &str,
        text: &str,
        top_k: usize,
    ) -> VectorResult<SearchResponse> {
        self.ensure_default_workspace_allowed("search_text")?;
        let vector = self.embedding_client.embed_one(text).await?;
        self.ann_searcher
            .search(SearchQuery {
                collection: collection.to_string(),
                vector,
                top_k,
                filter: None,
                include_vectors: false,
                include_metadata: true,
                ef_search: None,
                reranker: None,
            })
            .await
    }

    /// Execute ANN search from raw text scoped to a workspace.
    #[instrument(skip(self, text))]
    pub async fn search_text_in_workspace(
        &self,
        workspace_id: &str,
        collection: &str,
        text: &str,
        top_k: usize,
    ) -> VectorResult<SearchResponse> {
        let vector = self.embedding_client.embed_one(text).await?;
        self.ann_searcher
            .search_in_workspace(
                workspace_id,
                SearchQuery {
                    collection: collection.to_string(),
                    vector,
                    top_k,
                    filter: None,
                    include_vectors: false,
                    include_metadata: true,
                    ef_search: None,
                    reranker: None,
                },
            )
            .await
    }

    /// Execute hybrid search.
    #[instrument(skip(self, query))]
    pub async fn hybrid_search(&self, query: HybridQuery) -> VectorResult<SearchResponse> {
        self.ensure_default_workspace_allowed("hybrid_search")?;
        self.hybrid_searcher.search(query).await
    }

    /// Delete a vector record by UUID.
    #[instrument(skip(self))]
    pub async fn delete(&self, collection: &str, id: uuid::Uuid) -> VectorResult<bool> {
        self.ensure_default_workspace_allowed("delete")?;
        self.collections
            .delete_vector(&self.config.default_workspace_id, collection, id)
            .await
    }

    /// Delete a vector by UUID from a workspace-scoped collection.
    #[instrument(skip(self))]
    pub async fn delete_in_workspace(
        &self,
        workspace_id: &str,
        collection: &str,
        id: uuid::Uuid,
    ) -> VectorResult<bool> {
        self.collections
            .delete_vector(workspace_id, collection, id)
            .await
    }

    /// Fetch a vector record by UUID.
    #[instrument(skip(self))]
    pub async fn get(&self, collection: &str, id: uuid::Uuid) -> VectorResult<VectorRecord> {
        self.ensure_default_workspace_allowed("get")?;
        self.collections
            .get_vector(&self.config.default_workspace_id, collection, id)
            .await
    }

    /// Fetch a vector by UUID from a workspace-scoped collection.
    #[instrument(skip(self))]
    pub async fn get_in_workspace(
        &self,
        workspace_id: &str,
        collection: &str,
        id: uuid::Uuid,
    ) -> VectorResult<VectorRecord> {
        self.collections
            .get_vector(workspace_id, collection, id)
            .await
    }

    /// Persist indexes and close the underlying store.
    #[instrument(skip(self))]
    pub async fn close(&self) -> VectorResult<()> {
        self.collections.persist_indexes().await?;
        self.collections.store.close().await;
        Ok(())
    }

    /// Return runtime statistics for the engine.
    #[instrument(skip(self))]
    pub async fn stats(&self) -> EngineStats {
        let collections = self
            .collections
            .list_collections(&self.config.default_workspace_id)
            .await
            .unwrap_or_default();
        let cache_stats = self
            .embedding_client
            .cache_stats()
            .await
            .unwrap_or_default();

        EngineStats {
            collection_count: collections.len(),
            total_vectors: collections
                .iter()
                .map(|collection| collection.vector_count)
                .sum(),
            loaded_indexes: self.collections.loaded_index_count().await,
            loaded_mmap_files: self.collections.loaded_mmap_count().await,
            embedding_cache_hits: cache_stats.hit_count,
            embedding_cache_misses: cache_stats.miss_count,
        }
    }
}