"""
Binary data processing module for data anonymization
Handles binary data types (images, audio, video, etc.)
"""

import base64
import re
from typing import Dict, Any, Tuple
from dataclasses import dataclass

@dataclass
class BinaryData:
    """Repräsentiert Binärdaten"""
    content: str
    data_type: str  # 'image', 'audio', 'video', 'document', 'unknown'
    encoding: str  # 'base64', 'hex', 'raw'

class BinaryProcessor:
    """Handles binary data processing for anonymization"""
    
    def __init__(self):
        """Initialize the binary processor"""
        self.supported_types = {
            'image': ['.jpg', '.jpeg', '.png', '.gif', '.bmp', '.tiff', '.webp'],
            'audio': ['.mp3', '.wav', '.flac', '.aac', '.ogg', '.m4a'],
            'video': ['.mp4', '.avi', '.mov', '.wmv', '.flv', '.mkv', '.webm'],
            'document': ['.pdf', '.doc', '.docx', '.xls', '.xlsx', '.ppt', '.pptx']
        }
    
    def _detectBinaryType(self, content: str) -> str:
        """
        Detect if content is binary data and determine type
        
        Args:
            content: Content to analyze
            
        Returns:
            str: Binary type or 'text' if not binary
        """
        # Check if content looks like base64
        if re.match(r'^[A-Za-z0-9+/]*={0,2}$', content.strip()):
            try:
                decoded = base64.b64decode(content)
                # Try to decode as text
                decoded.decode('utf-8')
                return 'text'  # It's base64 encoded text
            except (base64.binascii.Error, UnicodeDecodeError):
                # It's binary data
                return 'binary'
        
        # Check for binary patterns
        if len(content) > 100 and '\x00' in content:
            return 'binary'
        
        return 'text'
    
    def isBinaryContent(self, content: str) -> bool:
        """
        Check if content is binary data
        
        Args:
            content: Content to check
            
        Returns:
            bool: True if content is binary
        """
        return self._detectBinaryType(content) == 'binary'
    
    def processBinaryContent(self, content: str) -> Tuple[Any, Dict[str, str], list, Dict[str, Any]]:
        """
        Process binary content for anonymization
        
        Args:
            content: Binary content to process
            
        Returns:
            Tuple of (processed_data, mapping, replaced_fields, processed_info)
        """
        # TODO: Implement binary data neutralization
        # This would require:
        # 1. Detecting binary data types (images, audio, video, etc.)
        # 2. Implementing specific neutralization for each type
        # 3. Handling metadata and embedded content
        # 4. Preserving binary integrity while removing sensitive data
        
        processedInfo = {
            'type': 'binary',
            'status': 'not_implemented',
            'message': 'Binary data neutralization not yet implemented'
        }
        
        return content, {}, [], processedInfo
    
    def getSupportedTypes(self) -> Dict[str, list]:
        """
        Get list of supported binary file types
        
        Returns:
            Dict[str, list]: Dictionary of supported types and their extensions
        """
        return self.supported_types.copy()