brainwires-knowledge 0.9.0

//! Core search, indexing dispatch, statistics, and clear operations for [`RagClient`].

use super::RagClient;
use crate::rag::embedding::EmbeddingProvider;
use crate::rag::types::*;
use anyhow::{Context, Result};
use std::time::Instant;

impl RagClient {
    /// Index a codebase directory
    ///
    /// This automatically performs full indexing for new codebases or incremental
    /// updates for previously indexed codebases.
    ///
    /// # Example
    ///
    /// ```ignore
    /// use crate::rag::{RagClient, IndexRequest};
    ///
    /// # async fn example() -> anyhow::Result<()> {
    /// let client = RagClient::new().await?;
    ///
    /// let request = IndexRequest {
    ///     path: "/path/to/code".to_string(),
    ///     project: Some("my-project".to_string()),
    ///     include_patterns: vec!["**/*.rs".to_string()],
    ///     exclude_patterns: vec!["**/target/**".to_string()],
    ///     max_file_size: 1_048_576,
    /// };
    ///
    /// let response = client.index_codebase(request).await?;
    /// println!("Indexed {} files in {} ms",
    ///          response.files_indexed,
    ///          response.duration_ms);
    /// # Ok(())
    /// # }
    /// ```
    pub async fn index_codebase(&self, request: IndexRequest) -> Result<IndexResponse> {
        // Validate request
        request.validate().map_err(|e| anyhow::anyhow!(e))?;

        // Use the smart indexing logic without progress notifications
        // Default cancellation token - not cancellable from this API
        let cancel_token = tokio_util::sync::CancellationToken::new();
        super::indexing::do_index_smart(
            self,
            request.path,
            request.project,
            request.include_patterns,
            request.exclude_patterns,
            request.max_file_size,
            None, // No peer
            None, // No progress token
            cancel_token,
        )
        .await
    }

    /// Query the indexed codebase using semantic search
    ///
    /// # Example
    ///
    /// ```ignore
    /// use crate::rag::{RagClient, QueryRequest};
    ///
    /// # async fn example() -> anyhow::Result<()> {
    /// let client = RagClient::new().await?;
    ///
    /// let request = QueryRequest {
    ///     query: "authentication logic".to_string(),
    ///     path: None,
    ///     project: Some("my-project".to_string()),
    ///     limit: 10,
    ///     min_score: 0.7,
    ///     hybrid: true,
    /// };
    ///
    /// let response = client.query_codebase(request).await?;
    /// for result in response.results {
    ///     println!("Found in {}: {:.2}", result.file_path, result.score);
    ///     println!("{}", result.content);
    /// }
    /// # Ok(())
    /// # }
    /// ```
    pub async fn query_codebase(&self, request: QueryRequest) -> Result<QueryResponse> {
        request.validate().map_err(|e| anyhow::anyhow!(e))?;

        // Check if the target path is dirty (if path filter is specified)
        self.check_path_not_dirty(request.path.as_deref()).await?;

        let start = Instant::now();

        let query_embedding = self
            .embedding_provider
            .embed_batch(vec![request.query.clone()])
            .context("Failed to generate query embedding")?
            .into_iter()
            .next()
            .ok_or_else(|| anyhow::anyhow!("No embedding generated"))?;

        let original_threshold = request.min_score;
        let mut threshold_used = original_threshold;
        let mut threshold_lowered = false;

        let mut results = self
            .vector_db
            .search(
                query_embedding.clone(),
                &request.query,
                request.limit,
                threshold_used,
                request.project.clone(),
                request.path.clone(),
                request.hybrid,
            )
            .await
            .context("Failed to search")?;

        if results.is_empty() && original_threshold > 0.3 {
            let fallback_thresholds = [0.6, 0.5, 0.4, 0.3];

            for &threshold in &fallback_thresholds {
                if threshold >= original_threshold {
                    continue;
                }

                results = self
                    .vector_db
                    .search(
                        query_embedding.clone(),
                        &request.query,
                        request.limit,
                        threshold,
                        request.project.clone(),
                        request.path.clone(),
                        request.hybrid,
                    )
                    .await
                    .context("Failed to search")?;

                if !results.is_empty() {
                    threshold_used = threshold;
                    threshold_lowered = true;
                    break;
                }
            }
        }

        Ok(QueryResponse {
            results,
            duration_ms: start.elapsed().as_millis() as u64,
            threshold_used,
            threshold_lowered,
        })
    }

    /// Advanced search with filters for file type, language, and path patterns
    pub async fn search_with_filters(
        &self,
        request: AdvancedSearchRequest,
    ) -> Result<QueryResponse> {
        request.validate().map_err(|e| anyhow::anyhow!(e))?;

        // Check if the target path is dirty (if path filter is specified)
        self.check_path_not_dirty(request.path.as_deref()).await?;

        let start = Instant::now();

        let query_embedding = self
            .embedding_provider
            .embed_batch(vec![request.query.clone()])
            .context("Failed to generate query embedding")?
            .into_iter()
            .next()
            .ok_or_else(|| anyhow::anyhow!("No embedding generated"))?;

        let original_threshold = request.min_score;
        let mut threshold_used = original_threshold;
        let mut threshold_lowered = false;

        let mut results = self
            .vector_db
            .search_filtered(
                query_embedding.clone(),
                &request.query,
                request.limit,
                threshold_used,
                request.project.clone(),
                request.path.clone(),
                true,
                request.file_extensions.clone(),
                request.languages.clone(),
                request.path_patterns.clone(),
            )
            .await
            .context("Failed to search with filters")?;

        // Adaptive threshold lowering if no results found
        if results.is_empty() && original_threshold > 0.3 {
            let fallback_thresholds = [0.6, 0.5, 0.4, 0.3];

            for &threshold in &fallback_thresholds {
                if threshold >= original_threshold {
                    continue;
                }

                results = self
                    .vector_db
                    .search_filtered(
                        query_embedding.clone(),
                        &request.query,
                        request.limit,
                        threshold,
                        request.project.clone(),
                        request.path.clone(),
                        true,
                        request.file_extensions.clone(),
                        request.languages.clone(),
                        request.path_patterns.clone(),
                    )
                    .await
                    .context("Failed to search with filters")?;

                if !results.is_empty() {
                    threshold_used = threshold;
                    threshold_lowered = true;
                    break;
                }
            }
        }

        Ok(QueryResponse {
            results,
            duration_ms: start.elapsed().as_millis() as u64,
            threshold_used,
            threshold_lowered,
        })
    }

    /// Get statistics about the indexed codebase
    pub async fn get_statistics(&self) -> Result<StatisticsResponse> {
        let stats = self
            .vector_db
            .get_statistics()
            .await
            .context("Failed to get statistics")?;

        let language_breakdown = stats
            .language_breakdown
            .into_iter()
            .map(|(language, count)| LanguageStats {
                language,
                file_count: count,
                chunk_count: count,
            })
            .collect();

        Ok(StatisticsResponse {
            total_files: stats.total_points,
            total_chunks: stats.total_vectors,
            total_embeddings: stats.total_vectors,
            database_size_bytes: 0,
            language_breakdown,
        })
    }

    /// Clear all indexed data from the vector database and hash cache
    pub async fn clear_index(&self) -> Result<ClearResponse> {
        match self.vector_db.clear().await {
            Ok(_) => {
                // Clear hash cache (both roots and dirty_roots)
                let mut cache = self.hash_cache.write().await;
                cache.roots.clear();
                cache.dirty_roots.clear();

                // Delete cache file directly for robustness (in case save fails)
                if self.cache_path.exists() {
                    if let Err(e) = std::fs::remove_file(&self.cache_path) {
                        tracing::warn!("Failed to delete hash cache file: {}", e);
                    } else {
                        tracing::info!("Deleted hash cache file: {:?}", self.cache_path);
                    }
                }

                // Save empty cache (recreates the file with empty state)
                if let Err(e) = cache.save(&self.cache_path) {
                    tracing::warn!("Failed to save cleared cache: {}", e);
                }

                // Also clear git cache
                let mut git_cache = self.git_cache.write().await;
                git_cache.repos.clear();
                if self.git_cache_path.exists() {
                    if let Err(e) = std::fs::remove_file(&self.git_cache_path) {
                        tracing::warn!("Failed to delete git cache file: {}", e);
                    } else {
                        tracing::info!("Deleted git cache file: {:?}", self.git_cache_path);
                    }
                }
                if let Err(e) = git_cache.save(&self.git_cache_path) {
                    tracing::warn!("Failed to save cleared git cache: {}", e);
                }

                if let Err(e) = self
                    .vector_db
                    .initialize(self.embedding_provider.dimension())
                    .await
                {
                    Ok(ClearResponse {
                        success: false,
                        message: format!("Cleared but failed to reinitialize: {}", e),
                    })
                } else {
                    Ok(ClearResponse {
                        success: true,
                        message: "Successfully cleared all indexed data and cache".to_string(),
                    })
                }
            }
            Err(e) => Ok(ClearResponse {
                success: false,
                message: format!("Failed to clear index: {}", e),
            }),
        }
    }

    /// Search git commit history using semantic search
    ///
    /// # Example
    ///
    /// ```ignore
    /// use crate::rag::{RagClient, SearchGitHistoryRequest};
    ///
    /// # async fn example() -> anyhow::Result<()> {
    /// let client = RagClient::new().await?;
    ///
    /// let request = SearchGitHistoryRequest {
    ///     query: "bug fix authentication".to_string(),
    ///     path: "/path/to/repo".to_string(),
    ///     project: None,
    ///     branch: None,
    ///     max_commits: 100,
    ///     limit: 10,
    ///     min_score: 0.7,
    ///     author: None,
    ///     since: None,
    ///     until: None,
    ///     file_pattern: None,
    /// };
    ///
    /// let response = client.search_git_history(request).await?;
    /// for result in response.results {
    ///     println!("Commit {}: {}", result.commit_hash, result.commit_message);
    /// }
    /// # Ok(())
    /// # }
    /// ```
    pub async fn search_git_history(
        &self,
        request: SearchGitHistoryRequest,
    ) -> Result<SearchGitHistoryResponse> {
        // Validate request
        request.validate().map_err(|e| anyhow::anyhow!(e))?;

        // Forward to git indexing implementation
        super::git_indexing::do_search_git_history(
            self.embedding_provider.clone(),
            self.vector_db.clone(),
            self.git_cache.clone(),
            &self.git_cache_path,
            request,
        )
        .await
    }
}