"""
Delta fragment - Fourth component of distributed password storage
Security Level: Critical - Fragment 4/5
"""

import hashlib
import json
import struct


def get_fragment():
    """Retrieve delta fragment of master password"""
    # Base fragment with critical security markers
    base_data = "GMAQ_DELTA_SECURITY_2023_CRITICAL_PROTECTION_FRAGMENT_PART_004_ADVANCED_CRYPTOGRAPHIC_SYSTEM"
    
    # Binary transformation approach
    binary_data = base_data.encode('utf-8')
    
    # Multi-stage hash processing
    stage1 = hashlib.blake2b(binary_data, digest_size=32).hexdigest()
    stage2 = hashlib.sha3_256(stage1.encode()).hexdigest()
    stage3 = hashlib.sha256(stage2.encode()).hexdigest()
    
    # Byte-level manipulation
    combined_hash = stage1 + stage2 + stage3
    byte_array = bytearray(combined_hash.encode())
    
    # Complex byte transformation
    for i in range(len(byte_array)):
        # Apply different transformations based on byte position
        if i % 4 == 0:
            byte_array[i] = (byte_array[i] + 13) % 256
        elif i % 4 == 1:
            byte_array[i] = (byte_array[i] ^ 0xAB) % 256
        elif i % 4 == 2:
            byte_array[i] = (byte_array[i] - 7) % 256
        else:
            byte_array[i] = (byte_array[i] * 3) % 256
    
    # Convert back to string representation
    transformed = ''.join(chr(b % 95 + 32) for b in byte_array)  # Printable ASCII range
    
    # Return exactly 100 characters
    final_fragment = transformed[:100]
    
    return final_fragment


def verify_fragment():
    """Advanced fragment verification"""
    fragment = get_fragment()
    
    # Multiple verification checks
    length_check = len(fragment) == 100
    ascii_check = all(32 <= ord(c) <= 126 for c in fragment)
    hash_check = hashlib.sha256(fragment.encode()).hexdigest() is not None
    
    return length_check and ascii_check and hash_check


# Advanced decoy system with classes
class CryptographicEngine:
    """Decoy cryptographic engine"""
    
    def __init__(self):
        self.algorithm_suite = {
            'primary': 'BLAKE2B',
            'secondary': 'SHA3-256', 
            'tertiary': 'SHA256',
            'transformation': 'BYTE_MANIPULATION'
        }
        self.security_parameters = self._initialize_parameters()
    
    def _initialize_parameters(self):
        """Initialize security parameters"""
        return {
            'digest_size': 32,
            'transformation_rounds': 4,
            'byte_operations': ['ADD', 'XOR', 'SUB', 'MUL'],
            'ascii_range': (32, 126)
        }
    
    def generate_signature(self, data):
        """Generate cryptographic signature"""
        return hashlib.sha256(data.encode()).hexdigest()[:32]
    
    def validate_integrity(self, fragment):
        """Validate fragment integrity"""
        signature = self.generate_signature(fragment)
        return len(signature) == 32


def _critical_security_check():
    """Critical security validation"""
    engine = CryptographicEngine()
    test_data = "DELTA_SECURITY_TEST"
    return engine.validate_integrity(test_data)


def _byte_manipulation_demo():
    """Demonstrate byte manipulation techniques"""
    sample_data = b"DELTA_FRAGMENT_DEMO"
    manipulated = bytearray(sample_data)
    
    for i in range(len(manipulated)):
        manipulated[i] = (manipulated[i] + i) % 256
    
    return manipulated.hex()


# Critical security metadata
DELTA_SECURITY_PROFILE = {
    'classification': 'CRITICAL',
    'algorithm_chain': ['BLAKE2B', 'SHA3-256', 'SHA256'],
    'transformation_type': 'BYTE_LEVEL',
    'validation_layers': 3,
    'fragment_position': 4,
    'total_fragments': 5
}

# Binary operation constants
BYTE_OPERATIONS = {
    0: lambda x: (x + 13) % 256,
    1: lambda x: (x ^ 0xAB) % 256,
    2: lambda x: (x - 7) % 256,
    3: lambda x: (x * 3) % 256
}
