def flask_environment(app=None):
    """ Get the current flask environment """
    if app:
        current_app = app
    else:
        from flask import current_app
        
    is_production = current_app.config.get('IS_PRODUCTION', False)
    server_name = current_app.config.get('SERVER_NAME', 'buyercall.com')

    if is_production:
        environment = 'prod'
    elif server_name:
        if 'demo' in server_name:
            environment = 'demo'
        else:
            environment = 'dev'    
    else:
        environment = 'dev'

    return environment