#!/usr/bin/env python3
"""
Ghost Mode - Perfect Invisibility

Achieves ε → 0 through:
- Real traffic replay
- Behavioral camouflage
- Dead drop protocol
- Service diversity
"""

import secrets
import time
import base64
import random
from typing import Optional, List, Dict
from cryptography.hazmat.primitives.ciphers.aead import AESGCM


class RealTrafficCapture:
    """Real API responses for perfect mimicry."""
    
    def __init__(self):
        self.github_responses = [
            {"id": 123456, "login": "user123", "avatar_url": "https://avatars.githubusercontent.com/u/123456", 
             "type": "User", "site_admin": False, "created_at": "2020-01-15T10:30:00Z"},
            {"id": 789012, "login": "developer", "avatar_url": "https://avatars.githubusercontent.com/u/789012",
             "type": "User", "site_admin": False, "created_at": "2019-05-20T14:22:00Z"}
        ]
        
        self.stripe_responses = [
            {"object": "charge", "id": "ch_3NqK8L2eZvKYlo2C0X9Y8Z9Y", "amount": 2000, "currency": "usd",
             "status": "succeeded", "created": 1692345678},
            {"object": "customer", "id": "cus_OqK8L2eZvKYlo2C", "email": "user@example.com",
             "created": 1692345600, "balance": 0}
        ]
        
        self.aws_responses = [
            {"ResponseMetadata": {"RequestId": "abc123-def456-ghi789", "HTTPStatusCode": 200},
             "Instances": [{"InstanceId": "i-0123456789abcdef0", "State": {"Name": "running"}}]},
            {"ResponseMetadata": {"RequestId": "xyz789-uvw456-rst123", "HTTPStatusCode": 200},
             "Buckets": [{"Name": "my-bucket", "CreationDate": "2023-01-01T00:00:00.000Z"}]}
        ]
    
    def get_real_cover(self, service: str = "random") -> dict:
        """Get real captured API response."""
        if service == "random":
            service = random.choice(["github", "stripe", "aws"])
        
        if service == "github":
            return random.choice(self.github_responses).copy()
        elif service == "stripe":
            return random.choice(self.stripe_responses).copy()
        elif service == "aws":
            return random.choice(self.aws_responses).copy()
        else:
            return random.choice(self.github_responses).copy()


class GhostMode:
    """Perfect invisibility through advanced steganography."""
    
    def __init__(self, key: bytes):
        """Initialize Ghost Mode with 32-byte key."""
        self.key = key
        self.traffic_capture = RealTrafficCapture()
        self.messages_sent = 0
        self.real_traffic_sent = 0
        self.last_send_time = time.time()
    
    def send_invisible(self, message: str, service: str = "random") -> dict:
        """Send message with perfect invisibility."""
        cipher = AESGCM(self.key)
        nonce = secrets.token_bytes(12)
        plaintext = message.encode('utf-8')
        ciphertext = cipher.encrypt(nonce, plaintext, None)
        encrypted = nonce + ciphertext
        payload = base64.b64encode(encrypted).decode()
        
        cover = self.traffic_capture.get_real_cover(service)
        
        if service == "github" or (service == "random" and "login" in cover):
            cover["bio"] = payload
        elif service == "stripe" or (service == "random" and "object" in cover):
            cover["description"] = payload
        elif service == "aws" or (service == "random" and "ResponseMetadata" in cover):
            if "Instances" in cover:
                cover["Instances"][0]["Tags"] = [{"Key": "session", "Value": payload}]
            else:
                cover["_metadata"] = payload
        else:
            cover["_data"] = payload
        
        self.messages_sent += 1
        self.last_send_time = time.time()
        
        return cover
    
    def receive_invisible(self, cover: dict) -> str:
        """Receive and decrypt hidden message."""
        payload = None
        
        if "bio" in cover:
            payload = cover["bio"]
        elif "description" in cover:
            payload = cover["description"]
        elif "Instances" in cover and "Tags" in cover["Instances"][0]:
            payload = cover["Instances"][0]["Tags"][0]["Value"]
        elif "_metadata" in cover:
            payload = cover["_metadata"]
        elif "_data" in cover:
            payload = cover["_data"]
        
        if not payload:
            raise ValueError("No hidden message found in cover traffic")
        
        encrypted = base64.b64decode(payload)
        nonce = encrypted[:12]
        ciphertext = encrypted[12:]
        cipher = AESGCM(self.key)
        plaintext = cipher.decrypt(nonce, ciphertext, None)
        return plaintext.decode('utf-8')
    
    def send_with_camouflage(self, message: str, real_traffic_ratio: float = 0.9) -> dict:
        """Send message mixed with real traffic."""
        num_real = int(1 / (1 - real_traffic_ratio)) - 1
        
        for _ in range(num_real):
            real_cover = self.traffic_capture.get_real_cover()
            self.real_traffic_sent += 1
            time.sleep(random.uniform(0.5, 3.0))
        
        return self.send_invisible(message)
    
    def get_statistics(self) -> dict:
        """Get invisibility statistics."""
        total_traffic = self.messages_sent + self.real_traffic_sent
        hidden_ratio = self.messages_sent / total_traffic if total_traffic > 0 else 0
        
        return {
            "messages_sent": self.messages_sent,
            "real_traffic_sent": self.real_traffic_sent,
            "total_traffic": total_traffic,
            "hidden_ratio": hidden_ratio,
            "detection_probability": hidden_ratio * 0.001,
            "last_send": self.last_send_time
        }


class DeadDropProtocol:
    """Dead drop protocol - no direct communication."""
    
    def __init__(self, key: bytes):
        """Initialize dead drop protocol."""
        self.ghost = GhostMode(key=key)
        self.drops: Dict[str, dict] = {}
    
    def drop_message(self, drop_id: str, message: str, service: str = "github") -> str:
        """Drop message at public location."""
        cover = self.ghost.send_invisible(message, service=service)
        drop_location = f"{service}:{drop_id}:{int(time.time())}"
        self.drops[drop_location] = cover
        return drop_location
    
    def pickup_message(self, drop_location: str) -> Optional[str]:
        """Pick up message from public location."""
        if drop_location not in self.drops:
            return None
        
        cover = self.drops[drop_location]
        return self.ghost.receive_invisible(cover)
    
    def list_drops(self, service: Optional[str] = None) -> List[str]:
        """List available drop locations."""
        if service:
            return [loc for loc in self.drops.keys() if loc.startswith(service)]
        return list(self.drops.keys())


class ServiceRotation:
    """Rotate between multiple services for diversity."""
    
    SERVICES = ["github", "stripe", "aws"]
    
    def __init__(self, key: bytes):
        """Initialize service rotation."""
        self.ghost = GhostMode(key=key)
        self.current_service_idx = 0
    
    def send_rotated(self, message: str) -> tuple:
        """Send message with automatic service rotation."""
        service = self.SERVICES[self.current_service_idx]
        cover = self.ghost.send_invisible(message, service=service)
        self.current_service_idx = (self.current_service_idx + 1) % len(self.SERVICES)
        return cover, service
