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# connections/source_connections.py
from sqlalchemy import create_engine

def connect_to_source_database1(source_db_connection_string1):
    engine = create_engine(source_db_connection_string1)
    return engine

def connect_to_source_database2(source_db_connection_string2):
    engine = create_engine(source_db_connection_string2)
    return engine



# connections/target_connections.py
from sqlalchemy import create_engine

def connect_to_target_database1(target_db_connection_string1):
    engine = create_engine(target_db_connection_string1)
    return engine

def connect_to_target_database2(target_db_connection_string2):
    engine = create_engine(target_db_connection_string2)
    return engine

# Define similar functions for the remaining target databases



# extraction/source_extraction.py
def extract_data_from_source_database(engine, query):
    with engine.connect() as connection:
        result = connection.execute(query)
        data = result.fetchall()
    return data


# transformation/data_transformation.py
def transform_data(data):
    # Perform data transformation operations here
    transformed_data = data  # Placeholder for actual transformation logic
    return transformed_data



# loading/target_loading.py
def load_data_into_target_database(engine, data):
    with engine.connect() as connection:
        # Assuming data is a list of tuples or dictionaries
        connection.execute("BEGIN")
        for row in data:
            # Perform data insertion into target database
            pass
        connection.execute("COMMIT")


# logging/logging.py
import logging

# Configure logging
logging.basicConfig(filename='migration.log', level=logging.INFO)

def log_migration_progress(message):
    logging.info(message)


# error_handling/error_handling.py
def handle_error(error):
    # Handle the error appropriately, such as logging, retrying, or raising exceptions
    pass


# validation/data_validation.py
def validate_data(data):
    # Perform data validation operations here
    validation_result = True  # Placeholder for actual validation logic
    return validation_result