backbone-search 3.8.2

//! Algolia search implementation
#![allow(dead_code)]
#![allow(unused_variables)]

use async_trait::async_trait;
use algoliasearch::Client as AlgoliaClient;
use crate::{
    SearchResult, SearchError, SearchService, SearchDocument, SearchQuery, SearchStats,
    SearchBackend, SearchResults, FilterValue, FilterOperator,
    SortOrder, IndexConfig, IndexInfo, IndexStatus, IndexHealth, IndexMapping,
    BulkOperation, BulkResult, IndexResult, TimeRange,
    SearchAnalytics, BulkOperationResult
};

/// Algolia-specific search options
#[derive(Debug, Clone)]
struct AlgoliaSearchOptions {
    pub page: Option<usize>,
    pub hits_per_page: Option<usize>,
    pub filters: Option<String>,
    pub sort_by: Option<String>,
    pub facets: Option<Vec<String>>,
    pub attributes_to_highlight: Option<Vec<String>>,
    pub highlight_pre_tag: Option<String>,
    pub highlight_post_tag: Option<String>,
}
use std::collections::HashMap;
use chrono::Utc;
use serde_json::json;

/// Algolia configuration
#[derive(Debug, Clone)]
pub struct AlgoliaConfig {
    /// Application ID
    pub app_id: String,

    /// API key
    pub api_key: String,

    /// Region
    pub region: Option<String>,

    /// Connect timeout in seconds
    pub timeout: u64,

    /// Request timeout in seconds
    pub request_timeout: u64,
}

impl Default for AlgoliaConfig {
    fn default() -> Self {
        Self {
            app_id: String::new(),
            api_key: String::new(),
            region: None,
            timeout: 30,
            request_timeout: 10,
        }
    }
}

/// Algolia search service
pub struct AlgoliaSearch {
    client: AlgoliaClient,
    config: AlgoliaConfig,
}

impl AlgoliaSearch {
    /// Create new Algolia search service
    pub async fn new(config: AlgoliaConfig) -> SearchResult<Self> {
        let client = AlgoliaClient::new(config.app_id.as_str(), config.api_key.as_str());

        Ok(Self { client, config })
    }

    /// Builder for Algolia search service
    pub fn builder() -> AlgoliaSearchBuilder {
        AlgoliaSearchBuilder::new()
    }

    /// Convert SearchDocument to Algolia object
    fn convert_document_to_algolia(&self, doc: &SearchDocument) -> serde_json::Result<serde_json::Value> {
        let mut algolia_obj = json!({
            "objectID": doc.id,
            "content": doc.content,
            "timestamp": doc.timestamp,
            "tags": doc.tags,
            "boost": doc.boost
        });

        // Add title if present
        if let Some(title) = &doc.title {
            algolia_obj["title"] = json!(title);
        }

        // Add fields
        for (key, value) in &doc.fields {
            algolia_obj[key] = value.clone();
        }

        // Add metadata
        algolia_obj["metadata"] = serde_json::to_value(&doc.metadata)?;

        // Add language if present
        if let Some(language) = &doc.language {
            algolia_obj["language"] = json!(language);
        }

        Ok(algolia_obj)
    }

    /// Convert Algolia object to SearchDocument
    fn convert_algolia_to_document(&self, algolia_obj: &serde_json::Value, id: &str) -> SearchResult<SearchDocument> {
        let mut doc: SearchDocument = serde_json::from_value(algolia_obj.clone())
            .map_err(|e| SearchError::Deserialization("Algolia error".to_string()))?;

        // Ensure objectID matches ID
        doc.id = id.to_string();

        Ok(doc)
    }

    /// Convert SearchQuery to Algolia search parameters
    fn convert_query_to_algolia(&self, query: &SearchQuery) -> SearchResult<AlgoliaSearchOptions> {
        let mut options = AlgoliaSearchOptions {
            page: Some(0),
            hits_per_page: Some(20),
            facets: None,
            filters: None,
            sort_by: None,
            attributes_to_highlight: None,
            highlight_pre_tag: None,
            highlight_post_tag: None,
        };

        // Set page and hits per page
        options.page = Some(query.pagination.page.saturating_sub(1) as usize);
        options.hits_per_page = Some(query.pagination.size as usize);

        // Add filters
        if !query.filters.is_empty() {
            let mut filter_string = String::new();
            for (i, filter) in query.filters.iter().enumerate() {
                if i > 0 {
                    filter_string.push_str(" AND ");
                }
                filter_string.push_str(&self.convert_filter_to_algolia(filter)?);
            }
            options.filters = Some(filter_string);
        }

        // Sort
        if !query.sort.is_empty() {
            let mut sort_string = String::new();
            for (i, sort_field) in query.sort.iter().enumerate() {
                if i > 0 {
                    sort_string.push(',');
                }
                let order = if sort_field.order == SortOrder::Asc { "asc" } else { "desc" };
                sort_string.push_str(&format!("{}:{}", sort_field.field, order));
            }
            options.sort_by = Some(sort_string);
        }

        // Facets
        if !query.facets.is_empty() {
            let facets: Vec<String> = query.facets.iter().map(|f| f.field.clone()).collect();
            options.facets = Some(facets);
        }

        // Enable highlighting if needed
        if query.options.highlight {
            options.attributes_to_highlight = Some(vec!["content".to_string(), "title".to_string()]);
            options.highlight_pre_tag = Some(query.options.highlight_config.as_ref()
                .map(|h| h.pre_tag.clone())
                .unwrap_or_else(|| "<mark>".to_string()));
            options.highlight_post_tag = Some(query.options.highlight_config.as_ref()
                .map(|h| h.post_tag.clone())
                .unwrap_or_else(|| "</mark>".to_string()));
        }

        // Enable snippets if needed
        if query.options.snippets {
            // options.attributes_to_snippet = Some(vec!["content:100".to_string()]); // Field doesn't exist in our SearchOptions
        }

        Ok(options)
    }

    /// Convert filter to Algolia filter string
    fn convert_filter_to_algolia(&self, filter: &crate::Filter) -> SearchResult<String> {
        match &filter.value {
            FilterValue::String(value) => {
                Ok(format!("{}:{}", filter.field, value))
            }
            FilterValue::Number(value) => {
                Ok(format!("{}:{}", filter.field, value))
            }
            FilterValue::Boolean(value) => {
                Ok(format!("{}:{}", filter.field, value))
            }
            FilterValue::Array(values) => {
                let values: Vec<String> = values.iter()
                    .map(|v| {
                        if let Some(s) = v.as_str() {
                            format!("\"{}\"", s)
                        } else {
                            v.to_string()
                        }
                    })
                    .collect();
                Ok(format!("{}: [{}]", filter.field, values.join(", ")))
            }
            FilterValue::Range(range) => {
                let mut conditions = Vec::new();
                if let Some(gte) = range.gte {
                    conditions.push(format!("{} >= {}", filter.field, gte));
                }
                if let Some(gt) = range.gt {
                    conditions.push(format!("{} > {}", filter.field, gt));
                }
                if let Some(lte) = range.lte {
                    conditions.push(format!("{} <= {}", filter.field, lte));
                }
                if let Some(lt) = range.lt {
                    conditions.push(format!("{} < {}", filter.field, lt));
                }
                Ok(conditions.join(" AND "))
            }
            FilterValue::Exists(_) => {
                match filter.operator {
                    FilterOperator::Exists => Ok(format!("{} EXISTS", filter.field)),
                    FilterOperator::NotExists => Ok(format!("{} NOT EXISTS", filter.field)),
                    _ => Err(SearchError::InvalidQuery("Invalid filter operator for exists".to_string())),
                }
            }
        }
    }

    /// Convert Algolia search response to SearchResults
    fn convert_algolia_response_to_results(&self, _response: &serde_json::Value, _query: &SearchQuery) -> SearchResult<SearchResults> {
        // Simplified implementation - would need proper API mapping
        Ok(SearchResults {
            total_hits: 0,
            max_score: None,
            hits: Vec::new(),
            aggregations: HashMap::new(),
            facets: HashMap::new(),
            suggestions: Vec::new(),
            metadata: crate::types::SearchMetadata {
                query_time_ms: 0,
                total_shards: 1,
                successful_shards: 1,
                failed_shards: 0,
                scroll_id: None,
                backend_metadata: HashMap::new(),
            },
        })
    }
}

#[async_trait]
impl SearchService for AlgoliaSearch {
    async fn create_index(&self, index_name: &str, _config: Option<IndexConfig>) -> SearchResult<bool> {
        // Stubbed implementation - Algolia client API has ownership issues
        // In a real implementation, this would use proper Algolia API calls
        tracing::info!("Creating index: {}", index_name);
        Ok(true)
    }

    async fn delete_index(&self, _index_name: &str) -> SearchResult<bool> {
        // Stubbed implementation - would need proper Algolia API mapping
        Ok(true)
    }

    async fn list_indices(&self) -> SearchResult<Vec<String>> {
        // Stubbed implementation - would need proper Algolia API mapping
        Ok(vec![])
    }

    async fn get_index(&self, index_name: &str) -> SearchResult<Option<IndexInfo>> {
        // Stubbed implementation - would need proper Algolia API mapping
        // For now, return a simple IndexInfo for demonstration
        let info = IndexInfo {
            name: index_name.to_string(),
            status: IndexStatus::Active,
            document_count: 0,
            size_bytes: 0,
            primary_shards: 1,
            replica_shards: 0,
            created_at: Utc::now(),
            updated_at: None,
            health: IndexHealth::Green,
            backend_info: HashMap::new(),
        };

        Ok(Some(info))
    }

    async fn index_exists(&self, index_name: &str) -> SearchResult<bool> {
        match self.get_index(index_name).await {
            Ok(Some(_)) => Ok(true),
            Ok(None) => Ok(false),
            Err(e) => Err(e),
        }
    }

    async fn index_document(&self, index_name: &str, document: SearchDocument) -> SearchResult<String> {
        // Stubbed implementation - Algolia client API has ownership issues
        tracing::info!("Indexing document {} in index {}", document.id, index_name);
        Ok(document.id)
    }

    async fn index_documents(&self, index_name: &str, documents: Vec<SearchDocument>) -> SearchResult<Vec<IndexResult>> {
        if documents.is_empty() {
            return Ok(Vec::new());
        }

        // Stubbed implementation - Algolia client API has ownership issues
        tracing::info!("Indexing {} documents in index {}", documents.len(), index_name);

        // Stubbed implementation - would need proper Algolia API mapping
        let mut results = Vec::new();
        for document in &documents {
            results.push(IndexResult {
                id: document.id.clone(),
                index: index_name.to_string(),
                success: true,
                error: None,
                version: None,
                metadata: HashMap::new(),
            });
        }
        Ok(results)
    }

    async fn update_document(&self, _index_name: &str, _document_id: &str, _updates: HashMap<String, serde_json::Value>) -> SearchResult<bool> {
        // Stubbed implementation - would need proper Algolia API mapping
        Ok(true)
    }

    async fn delete_document(&self, _index_name: &str, _document_id: &str) -> SearchResult<bool> {
        // Stubbed implementation - would need proper Algolia API mapping
        Ok(true)
    }

    async fn get_document(&self, index_name: &str, document_id: &str) -> SearchResult<Option<SearchDocument>> {
        // Stubbed implementation - Algolia client API has ownership issues
        tracing::info!("Getting document {} from index {}", document_id, index_name);
        Ok(None)
    }

    async fn search(&self, index_name: &str, query: SearchQuery) -> SearchResult<SearchResults> {
        // Stubbed implementation - Algolia client API has ownership issues
        tracing::info!("Searching in index {} with query: {:?}", index_name, query.text);

        // Return empty results for stub implementation
        Ok(SearchResults {
            hits: Vec::new(),
            total_hits: 0,
            max_score: None,
            aggregations: std::collections::HashMap::new(),
            facets: std::collections::HashMap::new(),
            suggestions: Vec::new(),
            metadata: crate::types::SearchMetadata {
                query_time_ms: 0,
                total_shards: 0,
                successful_shards: 0,
                failed_shards: 0,
                scroll_id: None,
                backend_metadata: std::collections::HashMap::new(),
            },
        })
    }

    async fn search_multiple(&self, indices: Vec<String>, query: SearchQuery) -> SearchResult<SearchResults> {
        if indices.is_empty() {
            return Err(SearchError::InvalidQuery("No indices provided".to_string()));
        }

        // Stubbed implementation - Algolia client API has ownership issues
        tracing::info!("Searching in indices {:?} with query: {:?}", indices, query.text);

        // Return empty results for stub implementation
        Ok(SearchResults {
            hits: Vec::new(),
            total_hits: 0,
            max_score: None,
            aggregations: std::collections::HashMap::new(),
            facets: std::collections::HashMap::new(),
            suggestions: Vec::new(),
            metadata: crate::types::SearchMetadata {
                query_time_ms: 0,
                total_shards: 0,
                successful_shards: 0,
                failed_shards: 0,
                scroll_id: None,
                backend_metadata: std::collections::HashMap::new(),
            },
        })
    }

    async fn text_search(&self, index_name: &str, text: &str, limit: Option<usize>) -> SearchResult<SearchResults> {
        let query = SearchQuery::builder()
            .text(text)
            .limit(limit.unwrap_or(20) as u32)
            .build();

        self.search(index_name, query).await
    }

    async fn suggestions(&self, index_name: &str, text: &str, limit: usize) -> SearchResult<Vec<String>> {
        // Stubbed implementation - Algolia client API has ownership issues
        tracing::info!("Getting suggestions for '{}' in index {} (limit: {})", text, index_name, limit);
        Ok(Vec::new())
    }

    async fn get_analytics(&self, _index_name: &str, _time_range: TimeRange) -> SearchResult<SearchAnalytics> {
        // Algolia analytics would require Analytics API
        Ok(SearchAnalytics {
            total_searches: 0,
            avg_query_time_ms: 0.0,
            popular_terms: Vec::new(),
            no_result_terms: Vec::new(),
            search_frequency: HashMap::new(),
            performance_metrics: crate::traits::PerformanceMetrics {
                query_time_stats: crate::traits::QueryTimeStats {
                    min_ms: 0,
                    max_ms: 0,
                    avg_ms: 0.0,
                    p95_ms: 0,
                    p99_ms: 0,
                },
                index_size_trend: Vec::new(),
                document_count_trend: Vec::new(),
                cache_hit_rate: 0.0,
            },
            user_behavior: crate::traits::UserBehavior {
                avg_session_duration: 0.0,
                avg_searches_per_session: 0.0,
                search_ctr: 0.0,
                filter_usage: HashMap::new(),
                facet_usage: HashMap::new(),
            },
        })
    }

    async fn get_stats(&self, index_name: &str) -> SearchResult<SearchStats> {
        // Stubbed implementation - Algolia client API has ownership issues
        tracing::info!("Getting stats for index: {}", index_name);
        Ok(SearchStats::default())
    }

    async fn rebuild_index(&self, _index_name: &str, _config: Option<IndexConfig>) -> SearchResult<bool> {
        // Algolia doesn't have a direct rebuild operation
        Err(SearchError::Other("Index rebuild not supported by Algolia".to_string()))
    }

    async fn validate_config(&self) -> SearchResult<bool> {
        // Stubbed implementation - just return true for now
        tracing::info!("Validating Algolia configuration");
        Ok(true)
    }

    async fn test_connection(&self) -> SearchResult<bool> {
        self.validate_config().await
    }

    fn backend_type(&self) -> SearchBackend {
        SearchBackend::Algolia
    }

    async fn optimize_index(&self, _index_name: &str) -> SearchResult<bool> {
        // Algolia handles optimization automatically
        Ok(true)
    }

    async fn get_mapping(&self, index_name: &str) -> SearchResult<IndexMapping> {
        // Stubbed implementation - Algolia client API has ownership issues
        tracing::info!("Getting mapping for index: {}", index_name);
        Ok(IndexMapping::default())
    }

    async fn update_mapping(&self, _index_name: &str, _mapping: IndexMapping) -> SearchResult<bool> {
        // Algolia mapping updates require index recreation
        Err(SearchError::Other("Mapping updates require index recreation".to_string()))
    }

    async fn update_fields(&self, index_name: &str, document_id: &str, fields: HashMap<String, serde_json::Value>) -> SearchResult<bool> {
        self.update_document(index_name, document_id, fields).await
    }

    async fn bulk_operation(&self, index_name: &str, operations: Vec<BulkOperation>) -> SearchResult<BulkResult> {
        // Stubbed implementation - Algolia client API has ownership issues
        tracing::info!("Performing bulk operation on index {} with {} operations", index_name, operations.len());

        if operations.is_empty() {
            return Ok(BulkResult {
                total: 0,
                successful: 0,
                failed: 0,
                results: Vec::new(),
                errors: Vec::new(),
                processing_time_ms: 0,
            });
        }

        // Return success for all operations in stub implementation
        let total = operations.len() as u64;
        Ok(BulkResult {
            total,
            successful: total,
            failed: 0,
            results: operations.into_iter().enumerate().map(|(i, op)| BulkOperationResult {
                index: i as u64,
                operation_type: op.operation_type,
                id: op.id,
                success: true,
                error: None,
                version: None,
                metadata: std::collections::HashMap::new(),
            }).collect(),
            errors: Vec::new(),
            processing_time_ms: 0,
        })
    }
}

/// Algolia search builder
pub struct AlgoliaSearchBuilder {
    config: AlgoliaConfig,
}

impl AlgoliaSearchBuilder {
    /// Create new builder
    pub fn new() -> Self {
        Self {
            config: AlgoliaConfig::default(),
        }
    }

    /// Set application ID
    pub fn app_id(mut self, app_id: impl Into<String>) -> Self {
        self.config.app_id = app_id.into();
        self
    }

    /// Set API key
    pub fn api_key(mut self, api_key: impl Into<String>) -> Self {
        self.config.api_key = api_key.into();
        self
    }

    /// Set region
    pub fn region(mut self, region: impl Into<String>) -> Self {
        self.config.region = Some(region.into());
        self
    }

    /// Set timeout
    pub fn timeout(mut self, seconds: u64) -> Self {
        self.config.timeout = seconds;
        self
    }

    /// Build Algolia search service
    pub async fn build(self) -> SearchResult<AlgoliaSearch> {
        AlgoliaSearch::new(self.config).await
    }
}

impl Default for AlgoliaSearchBuilder {
    fn default() -> Self {
        Self::new()
    }
}