database

type Database interface {
	// Document operations
	AddDocument(ctx context.Context, doc Document) error
	DeleteDocumentsByPath(ctx context.Context, sourcePath string) error
	SearchSimilar(ctx context.Context, queryEmbedding []float64, limit int) ([]SearchResult, error)
	GetDocumentsByPath(ctx context.Context, sourcePath string) ([]Document, error)

	// File metadata operations (for change detection and incremental indexing)
	GetFileMetadata(ctx context.Context, sourcePath string) (*FileMetadata, error)
	SetFileMetadata(ctx context.Context, metadata FileMetadata) error
	GetAllFileMetadata(ctx context.Context) ([]FileMetadata, error)
	DeleteFileMetadata(ctx context.Context, sourcePath string) error

	// Resource management
	Close() error
}

type Document struct {
	ID         string    `json:"id"`
	SourcePath string    `json:"source_path"`
	ChunkIndex int       `json:"chunk_index"`
	Content    string    `json:"content"`
	Embedding  []float64 `json:"-"`
	FileHash   string    `json:"file_hash"`
	CreatedAt  string    `json:"created_at"`
}

type FileMetadata struct {
	SourcePath  string
	FileHash    string
	LastIndexed string
	ChunkCount  int
}

type SearchResult struct {
	Document   Document `json:"document"`
	Similarity float64  `json:"similarity"`
}