import types
import sys
import marshal
import struct
import time

class MeroBytecode:
    def __init__(self):
        self.magic_number = 0x4d45524f
        self.obfuscation_layers = 5
        self.transformation_matrix = [
            [1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12], [13, 14, 15, 16]
        ]
        
    def compile_to_mero_bytecode(self, source_code, filename="<mero>"):
        try:
            code_obj = compile(source_code, filename, 'exec')
            standard_bytecode = marshal.dumps(code_obj)
            obfuscated = self._apply_obfuscation_layers(standard_bytecode)
            protected = self._apply_anti_reverse_protection(obfuscated)
            return self._create_mero_container(protected)
        except Exception as e:
            raise RuntimeError(f"Compilation failed: {e}")
            
    def execute_mero_bytecode(self, mero_bytecode, globals_dict=None, locals_dict=None):
        if globals_dict is None:
            globals_dict = {}
        if locals_dict is None:
            locals_dict = {}
            
        try:
            container = self._parse_mero_container(mero_bytecode)
            unprotected = self._remove_anti_reverse_protection(container)
            deobfuscated = self._remove_obfuscation_layers(unprotected)
            code_obj = marshal.loads(deobfuscated)
            return exec(code_obj, globals_dict, locals_dict)
        except Exception as e:
            raise RuntimeError(f"Execution failed: {e}")
            
    def _apply_obfuscation_layers(self, bytecode):
        result = bytearray(bytecode)
        
        for layer in range(self.obfuscation_layers):
            result = self._transform_layer(result, layer)
            result = self._permute_bytes(result, layer)
            result = self._add_noise_bytes(result, layer)
            
        return bytes(result)
        
    def _remove_obfuscation_layers(self, bytecode):
        result = bytearray(bytecode)
        
        for layer in range(self.obfuscation_layers - 1, -1, -1):
            result = self._remove_noise_bytes(result, layer)
            result = self._unpermute_bytes(result, layer)
            result = self._untransform_layer(result, layer)
            
        return bytes(result)
        
    def _transform_layer(self, data, layer):
        key = (layer * 0x9e3779b9) & 0xFFFFFFFF
        result = bytearray()
        for i, byte in enumerate(data):
            transformed = byte ^ ((key + i) & 0xFF)
            transformed = ((transformed << 1) | (transformed >> 7)) & 0xFF
            result.append(transformed)
        return result
        
    def _untransform_layer(self, data, layer):
        key = (layer * 0x9e3779b9) & 0xFFFFFFFF
        result = bytearray()
        for i, byte in enumerate(data):
            untransformed = ((byte >> 1) | (byte << 7)) & 0xFF
            untransformed = untransformed ^ ((key + i) & 0xFF)
            result.append(untransformed)
        return result
        
    def _permute_bytes(self, data, layer):
        if len(data) < 2:
            return data
            
        result = bytearray(data)
        step = (layer % 7) + 1
        
        for i in range(0, len(result) - step, step * 2):
            if i + step < len(result):
                result[i], result[i + step] = result[i + step], result[i]
                
        return result
        
    def _unpermute_bytes(self, data, layer):
        return self._permute_bytes(data, layer)
        
    def _add_noise_bytes(self, data, layer):
        noise_frequency = 16 + (layer * 4)
        result = bytearray()
        noise_counter = 0
        
        for i, byte in enumerate(data):
            result.append(byte)
            noise_counter += 1
            
            if noise_counter >= noise_frequency:
                noise_byte = (layer * 0x9e + i * 0x37) & 0xFF
                result.append(noise_byte)
                noise_counter = 0
                
        return result
        
    def _remove_noise_bytes(self, data, layer):
        noise_frequency = 16 + (layer * 4)
        result = bytearray()
        noise_counter = 0
        
        for byte in data:
            noise_counter += 1
            
            if noise_counter > noise_frequency:
                noise_counter = 0
                continue
            else:
                result.append(byte)
                
        return result
        
    def _apply_anti_reverse_protection(self, data):
        result = bytearray(data)
        
        checksum = self._calculate_checksum(result)
        timestamp = int(time.time()) & 0xFFFFFFFF
        
        protection_header = struct.pack('<II', checksum, timestamp)
        
        for i in range(len(result)):
            protection_key = (checksum + timestamp + i) & 0xFF
            result[i] ^= protection_key
            
        return protection_header + result
        
    def _remove_anti_reverse_protection(self, data):
        if len(data) < 8:
            raise ValueError("Invalid protected data")
            
        protection_header = data[:8]
        protected_data = bytearray(data[8:])
        
        checksum, timestamp = struct.unpack('<II', protection_header)
        
        for i in range(len(protected_data)):
            protection_key = (checksum + timestamp + i) & 0xFF
            protected_data[i] ^= protection_key
            
        calculated_checksum = self._calculate_checksum(protected_data)
        if calculated_checksum != checksum:
            raise ValueError("Data integrity check failed")
            
        return bytes(protected_data)
        
    def _calculate_checksum(self, data):
        checksum = 0
        for byte in data:
            checksum = (checksum + byte) & 0xFFFFFFFF
            checksum = ((checksum << 1) | (checksum >> 31)) & 0xFFFFFFFF
        return checksum
        
    def _create_mero_container(self, protected_data):
        header = bytearray(16)
        header[0:4] = struct.pack('<I', self.magic_number)
        header[4] = 1
        header[5] = self.obfuscation_layers
        header[6:8] = struct.pack('<H', len(protected_data))
        header[8:16] = struct.pack('<Q', int(time.time() * 1000000))
        
        return bytes(header) + protected_data
        
    def _parse_mero_container(self, container):
        if len(container) < 16:
            raise ValueError("Invalid container")
            
        header = container[:16]
        magic = struct.unpack('<I', header[0:4])[0]
        
        if magic != self.magic_number:
            raise ValueError("Invalid magic number")
            
        version = header[4]
        if version != 1:
            raise ValueError("Unsupported version")
            
        return container[16:]
        
    def create_executable_wrapper(self, mero_bytecode):
        import base64
        wrapper_code = f'''
import base64
import marshal
from mero.bytecode import MeroBytecode

_mero_data = {repr(base64.b64encode(mero_bytecode).decode())}
_bytecode_engine = MeroBytecode()

def _execute():
    decoded = base64.b64decode(_mero_data)
    _bytecode_engine.execute_mero_bytecode(decoded, globals(), locals())

if __name__ == "__main__":
    _execute()
'''
        return wrapper_code
        
    def analyze_bytecode_structure(self, bytecode):
        try:
            code_obj = marshal.loads(bytecode)
            return {
                'co_argcount': code_obj.co_argcount,
                'co_nlocals': code_obj.co_nlocals,
                'co_stacksize': code_obj.co_stacksize,
                'co_flags': code_obj.co_flags,
                'co_names': code_obj.co_names,
                'co_varnames': code_obj.co_varnames,
                'co_filename': code_obj.co_filename,
                'co_name': code_obj.co_name,
                'co_firstlineno': code_obj.co_firstlineno,
                'bytecode_size': len(code_obj.co_code)
            }
        except Exception:
            return None
