config

type Config struct {
	DataDirectory string          `yaml:"data_directory"`
	Database      DatabaseConfig  `yaml:"database"` // SQLite settings
	Search        SearchConfig    `yaml:"search"`   // Optional search
	Vectors       VectorConfig    `yaml:"vectors"`  // Optional vectors
	Embeddings    EmbeddingConfig `yaml:"embeddings"`
}

type DatabaseConfig struct {
	Path        string `yaml:"path"`
	CacheSize   int    `yaml:"cache_size"`   // in KB
	MMapSize    int64  `yaml:"mmap_size"`    // in bytes
	JournalMode string `yaml:"journal_mode"` // WAL
}

type EmbeddingConfig struct {
	Enabled         bool     `yaml:"enabled"`
	ModelsDirectory string   `yaml:"models_directory"`
	DefaultModel    string   `yaml:"default_model"`    // HuggingFace model path
	DefaultVariant  string   `yaml:"default_variant"`  // quantized, fp16, or default
	BatchSize       int      `yaml:"batch_size"`       // Batch size for embedding
	NumThreads      int      `yaml:"num_threads"`      // ONNX runtime threads
	MaxTextLength   int      `yaml:"max_text_length"`  // Max tokens
	CombineFields   []string `yaml:"combine_fields"`   // Fields to combine for embedding
	CacheEmbeddings bool     `yaml:"cache_embeddings"` // Cache computed embeddings
}

type SearchConfig struct {
	Enabled        bool   `yaml:"enabled"`          // Enable Bleve search
	Backend        string `yaml:"backend"`          // "bleve" or "sqlite"
	IndexPath      string `yaml:"index_path"`       // Path to Bleve index
	RebuildOnStart bool   `yaml:"rebuild_on_start"` // Rebuild index on startup
	AutoSync       bool   `yaml:"auto_sync"`        // Auto-sync with SQLite
	SyncInterval   int    `yaml:"sync_interval"`    // Sync interval in seconds
	DefaultLimit   int    `yaml:"default_limit"`    // Default result limit
	BatchSize      int    `yaml:"batch_size"`       // Indexing batch size
	UseCache       bool   `yaml:"use_cache"`        // Enable search cache
	CacheTTL       int    `yaml:"cache_ttl"`        // Cache TTL in seconds
}

type VectorConfig struct {
	Enabled          bool   `yaml:"enabled"`           // Enable vector search
	RequiresSearch   bool   `yaml:"requires_search"`   // Requires search to be enabled
	SimilarityMetric string `yaml:"similarity_metric"` // cosine, dot_product, l2_norm
	UseQuantized     bool   `yaml:"use_quantized"`     // Use INT8 for speed
	Dimensions       int    `yaml:"dimensions"`        // Vector dimensions (768 for SapBERT)
	Optimization     string `yaml:"optimization"`      // memory_efficient, latency, recall
}