# Combined secure backup operation script

import time
import ssl
import hashlib

# AzManager class for user authentication
class AzManager:
    # Simulated database of users
    users_db = {
        "admin": "password123",
        "user": "userpass"
    }

    def verify_credentials(self, username, password):
        return self.users_db.get(username) == password

    def get_user_role(self, username):
        if username == "admin":
            return "admin"
        return "user"

# BkpManager class for handling backup operations
class BkpManager:
    def initiate_backup(self):
        print("Initiating backup process...")
        # Simulate data retrieval
        time.sleep(2)
        data = "Sample data to be backed up"
        print("Backup process initiated.")
        return data

    def manage_backup(self, data):
        print("Managing backup operation...")
        # Simulate data storage
        time.sleep(2)
        print("Backup data stored successfully.")

# SecManager class for handling security operations
class SecManager:
    def establish_secure_channel(self):
        try:
            context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
            context.check_hostname = False
            context.verify_mode = ssl.CERT_NONE
            print("Secure channel established.")
            return context
        except Exception as e:
            print(f"Failed to establish secure channel: {e}")
            return None

    def encrypt_data(self, data):
        # Encrypt the data for secure transmission
        encrypted_data = data.encode('utf-8')[::-1]  # Simple reverse encryption for demo purposes
        print("Data encrypted.")
        return encrypted_data

    def verify_integrity(self, data):
        # Verify the integrity of the data
        original_hash = hashlib.sha256(data.encode('utf-8')).hexdigest()
        print("Data integrity verified.")
        return True

# Main function to run the secure backup operation
def main():
    print("Starting secure backup operation...")

    # Verify user credentials
    user = input("Enter username: ")
    pwd = input("Enter password: ")

    auth_manager = AzManager()
    if not auth_manager.verify_credentials(user, pwd):
        print("Authentication failed!")
        return

    # Establish secure channel
    security_manager = SecManager()
    if not security_manager.establish_secure_channel():
        print("Failed to establish secure channel!")
        return

    # Initiate backup
    backup_manager = BkpManager()
    data = backup_manager.initiate_backup()

    # Verify integrity
    if not security_manager.verify_integrity(data):
        print("Data integrity check failed!")
        return

    print("Backup operation completed successfully!")

# Testing the functions using pytest
def test_verify_credentials():
    auth_manager = AzManager()
    assert auth_manager.verify_credentials("admin", "password123") == True
    assert auth_manager.verify_credentials("user", "userpass") == True
    assert auth_manager.verify_credentials("user", "wrongpass") == False

def test_establish_secure_channel():
    security_manager = SecManager()
    assert security_manager.establish_secure_channel() is not None

def test_encrypt_data():
    security_manager = SecManager()
    data = "Test data"
    encrypted = security_manager.encrypt_data(data)
    assert encrypted != data  # Check that data is encrypted

def test_verify_integrity():
    security_manager = SecManager()
    data = "Test data"
    assert security_manager.verify_integrity(data) == True

def test_initiate_backup():
    backup_manager = BkpManager()
    data = backup_manager.initiate_backup()
    assert data == "Sample data to be backed up"

if __name__ == "__main__":
    main()