from datetime import datetime
import subprocess
import sys

log_file = __file__


def log(message):
    """
    :type message:str
    """
    time_format = "%d-%b %H:%M:%S"
    now = datetime.now().strftime(time_format)
    formatted = "{}: {}".format(now, message)
    print(formatted)
    with open(log_file, "a+") as f:
        f.write(formatted + "\n")


def execute(cmd, raise_exception=True, **kwargs):
    """
    :param raise_exception: not raise exception if non-zero return code is expected
    :type cmd:str
    """
    if len(kwargs) != 0:
        log("Execute cmd: <{}> with kwargs:<{}>".format(cmd, kwargs))
    else:
        log("Execute cmd: <{}>".format(cmd))

    cmd = cmd.split(" ")
    pipe = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, **kwargs)
    stdout, stderror = pipe.communicate()
    returncode = pipe.returncode

    if stdout != "" and stdout is not None:
        log("{0} Begin stdout {0}".format("*" * 30))
        with open(log_file, "a+") as f:
            sys.stdout.writelines(stdout)
            f.writelines(stdout)
        log("{0} End   stdout {0}".format("*" * 30))

    if returncode != 0:

        if stderror != "" and stderror is not None:
            log("{0} Begin stderr {0}".format("*" * 30))
            log("Non-zero code returned <{}>".format(returncode))
            with open(log_file, "a+") as f:
                sys.stdout.writelines(stderror)
                f.writelines(stderror)
            log("{0} End   stderr {0}".format("*" * 30))

        if raise_exception:
            raise subprocess.CalledProcessError(returncode, cmd)

        else:
            return False
    else:
        return True