import paramiko
import sys
import time
from paramiko.sftp_client import SFTPClient

# The content of tesseract_node2.py as a string (to copy to remote)
TESSERACT_NODE2_CONTENT = """
#!/usr/bin/env python3
# =================================================
# TESSERACT-NODE v1.0 — 4D OFFLINE QUANTUM SERVER
# Copyright Daniel Harding - RomanAILabs
# FIXED FOR QISKIT 1.0+ | OFFLINE | LINUX
# =================================================

import os
import numpy as np
from datetime import datetime
from flask import Flask, jsonify, request
from qiskit import QuantumCircuit, transpile
from qiskit_aer import AerSimulator
import matplotlib.pyplot as plt
import threading
import time

app = Flask(__name__)

# === 4D SPACETIME COORDINATES ===
class Spacetime4D:
    def __init__(self):
        self.c = 299792458
        self.t = self.x = self.y = self.z = 0

    def move(self, dt, dx, dy, dz):
        self.t += dt
        self.x += dx
        self.y += dy
        self.z += dz
        return (self.c * self.t, self.x, self.y, self.z)

# === QUANTUM ENGINE (FIXED) ===
class QuantumCore:
    def __init__(self):
        self.backend = AerSimulator()

    def create_entangled_pair(self):
        qc = QuantumCircuit(2, 2)
        qc.h(0)
        qc.cx(0, 1)
        qc.measure([0,1], [0,1])
        job = self.backend.run(transpile(qc, self.backend), shots=1)
        result = job.result()
        counts = result.get_counts()
        return list(counts.keys())[0]

    def ghz_state(self, n=4):
        qc = QuantumCircuit(n, n)
        qc.h(0)
        for i in range(n-1):
            qc.cx(i, i+1)
        qc.measure_all()
        job = self.backend.run(transpile(qc, self.backend), shots=1)
        return job.result().get_counts()

# === 4D DATA STORAGE ===
class HyperMemory:
    def __init__(self):
        self.data = {}

    def store(self, coord, value):
        self.data[coord] = value

    def retrieve(self, coord):
        return self.data.get(coord, None)

# === GLOBAL INSTANCES ===
spacetime = Spacetime4D()
quantum = QuantumCore()
memory = HyperMemory()

# === API ENDPOINTS ===
@app.route('/')
def home():
    return \"""
    <h1>TESSERACT-NODE v1.0</h1>
    <p><b>4D Offline Quantum Server</b> — <span style="color:lime">ONLINE</span></p>
    <ul>
        <li><a href="/status">/status</a></li>
        <li><a href="/entangle">/entangle</a></li>
        <li><a href="/ghz">/ghz</a></li>
        <li><a href="/move?dt=1&dx=10">/move</a></li>
    </ul>
    \"""

@app.route('/status')
def status():
    return jsonify({
        "node": "Tesseract-Node Ω",
        "status": "4D OPERATIONAL",
        "time": datetime.now().isoformat(),
        "position": spacetime.move(0,0,0,0),
        "qubits": 16,
        "offline": True
    })

@app.route('/entangle')
def entangle():
    result = quantum.create_entangled_pair()
    return jsonify({
        "bell_pair": result,
        "entanglement": "ACHIEVED"
    })

@app.route('/ghz')
def ghz():
    result = quantum.ghz_state(4)
    return jsonify({
        "ghz_state": list(result.keys())[0],
        "qubits": 4
    })

@app.route('/move')
def move():
    dt = float(request.args.get('dt', 0))
    dx = float(request.args.get('dx', 0))
    pos = spacetime.move(dt, dx, 0, 0)
    return jsonify({"new_position": pos})

# === BACKGROUND DRIFT ===
def drift():
    while True:
        time.sleep(10)
        spacetime.move(1, np.random.randn(), np.random.randn(), np.random.randn())
        print(f"[4D DRIFT] {spacetime.move(0,0,0,0)}")

threading.Thread(target=drift, daemon=True).start()

# === START ===
if __name__ == '__main__':
    print("TESSERACT-NODE v1.0 — 4D CORE ONLINE")
    print("http://0.0.0.0:8888")  # Changed to 0.0.0.0 for network access
    app.run(host='0.0.0.0', port=8888)
"""

def deploy_tesseract_to_remote(host_ip, username, password=None, private_key_path=None, remote_path="/tmp/tesseract_node2.py", timeout=30):
    """
    Fully functional script to 'teleport' into a remote computer's network by deploying and running the tesseract_node2.py script.
    Uses SSH to copy the script to the target, install dependencies if needed, and run the server.
    The server will be accessible over the network at http://target_ip:8888.

    Args:
    - host_ip: str - IP address of the target computer (e.g., '192.168.1.100')
    - username: str - Username on the target (e.g., 'user')
    - password: str (optional) - Password if not using keys
    - private_key_path: str (optional) - Path to private SSH key (e.g., '~/.ssh/id_rsa')
    - remote_path: str - Where to save the script on remote (default: /tmp/tesseract_node2.py)
    - timeout: int - Connection timeout in seconds

    Assumes target has Python3, pip, and sudo access. Installs qiskit, flask, etc., if needed.
    """
    try:
        # Initialize SSH client
        client = paramiko.SSHClient()
        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

        # Connect
        if private_key_path:
            private_key = paramiko.RSAKey.from_private_key_file(private_key_path)
            client.connect(hostname=host_ip, username=username, pkey=private_key, timeout=timeout)
        else:
            client.connect(hostname=host_ip, username=username, password=password, timeout=timeout)

        print(f"Connected to {host_ip} as {username}.")

        # SFTP to copy the script
        sftp: SFTPClient = client.open_sftp()
        with sftp.file(remote_path, 'w') as remote_file:
            remote_file.write(TESSERACT_NODE2_CONTENT)
        sftp.chmod(remote_path, 0o755)  # Make executable
        sftp.close()
        print(f"Uploaded tesseract_node2.py to {remote_path}.")

        # Install dependencies (assuming Ubuntu/Debian; adapt if needed)
        install_cmd = (
            "sudo apt update -y && "
            "sudo apt install -y python3-pip && "
            "pip3 install qiskit qiskit-aer flask numpy matplotlib"
        )
        stdin, stdout, stderr = client.exec_command(install_cmd)
        output = stdout.read().decode('utf-8').strip()
        error = stderr.read().decode('utf-8').strip()
        if error:
            print(f"Install error: {error}")
        else:
            print("Dependencies installed.")

        # Run the server in background
        run_cmd = f"nohup python3 {remote_path} > /tmp/tesseract.log 2>&1 &"
        stdin, stdout, stderr = client.exec_command(run_cmd)
        time.sleep(2)  # Give time to start

        # Check if running
        check_cmd = "ps aux | grep tesseract_node2.py | grep -v grep"
        stdin, stdout, stderr = client.exec_command(check_cmd)
        if stdout.read().decode('utf-8').strip():
            print(f"Tesseract server running on {host_ip}:8888")
            print("Access via browser: http://{host_ip}:8888")
            print("Endpoints: /status, /entangle, /ghz, /move")
        else:
            print("Failed to start server. Check /tmp/tesseract.log on remote.")

        client.close()

    except paramiko.AuthenticationException:
        print("Authentication failed. Check credentials.")
        sys.exit(1)
    except paramiko.SSHException as e:
        print(f"SSH error: {e}")
        sys.exit(1)
    except Exception as e:
        print(f"Error: {e}")
        sys.exit(1)

# Example usage (customize)
if __name__ == "__main__":
    TARGET_IP = "192.168.1.100"  # Target computer's IP
    USERNAME = "demo_user"      # Username on target
    PASSWORD = "your_password"  # Or None if using keys
    PRIVATE_KEY = None          # e.g., "/home/youruser/.ssh/id_rsa" or None

    deploy_tesseract_to_remote(TARGET_IP, USERNAME, PASSWORD, PRIVATE_KEY)