from typing import Any, Dict, List
import base64

from ..subUtils import makeId
from modules.datamodels.datamodelExtraction import ContentPart
from ..subRegistry import Extractor


class BinaryExtractor(Extractor):
    """
    Fallback extractor for unsupported file types.
    
    This extractor handles any file type that doesn't match other extractors.
    It encodes the file as base64 and marks it as binary data.
    
    Supported formats:
    - All file types (fallback)
    - MIME types: application/octet-stream (default)
    - File extensions: All (fallback)
    """
    
    def detect(self, fileName: str, mimeType: str, headBytes: bytes) -> bool:
        return True
    
    def getSupportedExtensions(self) -> list[str]:
        """Return list of supported file extensions (all)."""
        return []  # Accepts all extensions as fallback
    
    def getSupportedMimeTypes(self) -> list[str]:
        """Return list of supported MIME types (all)."""
        return []  # Accepts all MIME types as fallback

    def extract(self, fileBytes: bytes, context: Dict[str, Any]) -> List[ContentPart]:
        mimeType = context.get("mimeType") or "application/octet-stream"
        return [ContentPart(
            id=makeId(),
            parentId=None,
            label="binary",
            typeGroup="binary",
            mimeType=mimeType,
            data=base64.b64encode(fileBytes).decode("utf-8"),
            metadata={"size": len(fileBytes), "warning": "Unsupported file type"}
        )]