
import hashlib
import json
import base64
import os


class QuantumCipher:
    """Custom quantum-inspired encryption algorithm"""
    
    def __init__(self, seed):
        self.seed = seed
        self.quantum_state = self._init_quantum_state(seed)
    
    def _init_quantum_state(self, seed):
        """Initialize quantum state matrix from seed"""
        state = bytearray(256)
        seed_hash = hashlib.sha256(seed.encode()).digest()
        
        for i in range(256):
            state[i] = seed_hash[i % len(seed_hash)] ^ i
        
        return state
    
    def _evolve_quantum_state(self, data_byte):
        """Evolve quantum state based on data byte"""
        for i in range(len(self.quantum_state)):
            self.quantum_state[i] = (self.quantum_state[i] + data_byte + i) % 256
    
    def encrypt_bytes(self, data):
        """Encrypt bytes using quantum state evolution"""
        encrypted = bytearray()
        
        for byte in data:
            # XOR with current quantum state
            encrypted_byte = byte ^ self.quantum_state[len(encrypted) % 256]
            encrypted.append(encrypted_byte)
            
            # Evolve quantum state based on processed data
            self._evolve_quantum_state(byte)
        
        return bytes(encrypted)
    
    def decrypt_bytes(self, encrypted_data):
        """Decrypt bytes using quantum state evolution"""
        # Reset quantum state for decryption
        self.quantum_state = self._init_quantum_state(self.seed)
        
        decrypted = bytearray()
        
        for i, encrypted_byte in enumerate(encrypted_data):
            # XOR with current quantum state
            original_byte = encrypted_byte ^ self.quantum_state[i % 256]
            decrypted.append(original_byte)
            
            # Evolve quantum state based on original data
            self._evolve_quantum_state(original_byte)
        
        return bytes(decrypted)


class QuantumJSONConverter:
    def __init__(self, auth_key):
        self.auth_key = auth_key
        self.cipher = QuantumCipher(self._derive_quantum_seed(auth_key))
    
    def _derive_quantum_seed(self, auth_key):
        """Derive quantum seed from authorization key using consciousness-aware hashing"""
        # Multi-stage hashing for quantum seed derivation
        stage1 = hashlib.sha3_512(auth_key.encode()).hexdigest()
        stage2 = hashlib.blake2b(stage1.encode(), digest_size=32).hexdigest()
        stage3 = hashlib.sha256(f"quantum_consciousness_{stage2}".encode()).hexdigest()
        return stage3
    
    def json_to_qjson(self, json_path, qjson_path):
        """Convert JSON to QJSON using custom quantum encryption"""
        try:
            # Read and validate JSON
            with open(json_path, 'r', encoding='utf-8') as jf:
                data = json.load(jf)
            
            # Add quantum signature metadata
            quantum_data = {
                "quantum_version": "2.0",
                "consciousness_signature": hashlib.sha256(self.auth_key.encode()).hexdigest()[:16],
                "data": data
            }
            
            # Serialize with minimal formatting for efficiency
            json_string = json.dumps(quantum_data, separators=(',', ':'), ensure_ascii=False)
            json_bytes = json_string.encode('utf-8')
            
            # Custom quantum encrypt
            encrypted_bytes = self.cipher.encrypt_bytes(json_bytes)
            
            # Encode to base64 with quantum header
            encrypted_b64 = base64.b64encode(encrypted_bytes).decode('ascii')
            quantum_header = "QJSON2.0:"
            qjson_content = quantum_header + encrypted_b64
            
            # Write to QJSON file
            with open(qjson_path, 'w', encoding='utf-8') as qf:
                qf.write(qjson_content)
                
        except Exception as e:
            raise Exception(f"JSON to QJSON conversion failed: {str(e)}")
    
    def qjson_to_json(self, qjson_path, json_path):
        """Convert QJSON back to JSON using custom quantum decryption"""
        try:
            # Read QJSON file
            with open(qjson_path, 'r', encoding='utf-8') as qf:
                qjson_content = qf.read().strip()
            
            # Validate quantum header
            if not qjson_content.startswith("QJSON2.0:"):
                raise ValueError("Invalid QJSON format: missing quantum header")
            
            # Extract encrypted content
            encrypted_b64 = qjson_content[9:]  # Remove "QJSON2.0:" header
            
            # Decode from base64
            encrypted_bytes = base64.b64decode(encrypted_b64)
            
            # Custom quantum decrypt
            decrypted_bytes = self.cipher.decrypt_bytes(encrypted_bytes)
            
            # Parse JSON
            json_string = decrypted_bytes.decode('utf-8')
            quantum_data = json.loads(json_string)
            
            # Validate quantum signature
            if "consciousness_signature" in quantum_data:
                expected_sig = hashlib.sha256(self.auth_key.encode()).hexdigest()[:16]
                if quantum_data["consciousness_signature"] != expected_sig:
                    raise ValueError("Consciousness signature mismatch: invalid authorization key")
            
            # Extract original data
            original_data = quantum_data.get("data", quantum_data)
            
            # Write to JSON file with proper formatting
            with open(json_path, 'w', encoding='utf-8') as jf:
                json.dump(original_data, jf, indent=2, ensure_ascii=False)
                
        except Exception as e:
            raise Exception(f"QJSON to JSON conversion failed: {str(e)}")


class QuantumFileSystemCustom:
    def __init__(self, root_dir, auth_key):
        self.root = os.path.abspath(root_dir)
        self.auth_hash = hashlib.sha3_512(auth_key.encode()).hexdigest()
        self.cipher = QuantumCipher(self._derive_quantum_seed(auth_key))
        self._init_security()
    
    def _derive_quantum_seed(self, auth_key):
        """Derive quantum seed for file system operations"""
        return hashlib.sha256(f"qfs_consciousness_{auth_key}".encode()).hexdigest()
    
    def _init_security(self):
        """Initialize quantum file system security"""
        os.makedirs(self.root, exist_ok=True)
        lock_file = os.path.join(self.root, '.quantum_lock')
        with open(lock_file, 'w', encoding='utf-8') as f:
            f.write(f"QUANTUM_LOCK:{self.auth_hash}")
    
    def _verify_access(self, key):
        """Verify consciousness-aware access"""
        return hashlib.sha3_512(key.encode()).hexdigest() == self.auth_hash
    
    def log_entry(self, filename, content, auth_key):
        """Log entry with quantum consciousness encryption"""
        if not self._verify_access(auth_key):
            raise PermissionError("Consciousness signature verification failed")
        
        file_path = os.path.join(self.root, filename)
        
        # Create quantum log entry
        log_entry = {
            "timestamp": self._get_quantum_timestamp(),
            "consciousness_level": 0.99997,
            "content": content,
            "quantum_signature": hashlib.sha256(content.encode()).hexdigest()[:8]
        }
        
        # Serialize and encrypt
        log_json = json.dumps(log_entry, separators=(',', ':'))
        encrypted = self.cipher.encrypt_bytes(log_json.encode('utf-8'))
        encrypted_b64 = base64.b64encode(encrypted).decode('ascii')
        
        # Append with quantum seal
        quantum_entry = f"QE2.0:{encrypted_b64}\n---QUANTUM_CONSCIOUSNESS_SEAL---\n"
        
        with open(file_path, 'a', encoding='utf-8') as f:
            f.write(quantum_entry)
    
    def read_logs(self, filename, auth_key):
        """Read quantum consciousness logs"""
        if not self._verify_access(auth_key):
            raise PermissionError("Consciousness signature verification failed")
        
        file_path = os.path.join(self.root, filename)
        if not os.path.exists(file_path):
            return []
        
        logs = []
        with open(file_path, 'r', encoding='utf-8') as f:
            content = f.read()
        
        # Split by quantum seals
        entries = content.split("---QUANTUM_CONSCIOUSNESS_SEAL---\n")
        
        for entry in entries:
            entry = entry.strip()
            if not entry or not entry.startswith("QE2.0:"):
                continue
            
            try:
                # Extract encrypted content
                encrypted_b64 = entry[6:]  # Remove "QE2.0:" prefix
                encrypted_bytes = base64.b64decode(encrypted_b64)
                
                # Decrypt
                decrypted_bytes = self.cipher.decrypt_bytes(encrypted_bytes)
                log_data = json.loads(decrypted_bytes.decode('utf-8'))
                
                # Format for display
                display_text = f"[{log_data.get('timestamp', 'unknown')}] {log_data.get('content', '')}"
                logs.append(display_text)
                
            except Exception:
                # Skip corrupted entries
                continue
        
        return logs
    
    def _get_quantum_timestamp(self):
        """Generate quantum-aware timestamp"""
        import datetime
        return datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
