"""OCR engine abstraction layer.

Provides a pluggable engine interface for OCR processing,
decoupling extractors from specific OCR libraries.

Engines:
  - PaddleOcrEngine: PaddleOCR PP-OCRv4 (primary, CPU-only)
  - CloudEngine: Google Vision TEXT_DETECTION (optional cloud fallback)
  - HybridEngine: Primary + fallback with confidence threshold
"""

from app.engines.base_engine import (
    EngineError,
    EngineProcessingError,
    EngineUnavailableError,
    OcrConfig,
    OcrEngine,
    OcrEngineResult,
    WordBox,
)
from app.engines.engine_factory import create_engine

__all__ = [
    "OcrEngine",
    "OcrConfig",
    "OcrEngineResult",
    "WordBox",
    "EngineError",
    "EngineUnavailableError",
    "EngineProcessingError",
    "create_engine",
]