"""
Miscellaneous functions useful in at least two places unrelated to each other
"""
import logging
import subprocess

# Copied into bootstrap/bootstrap.py. Make sure these two copies are exactly the same!
import pluggy

from tljh import hooks


def run_subprocess(cmd, *args, **kwargs):
    """
    Run given cmd with smart output behavior.

    If command succeeds, print output to debug logging.
    If it fails, print output to info logging.

    In TLJH, this sends successful output to the installer log,
    and failed output directly to the user's screen
    """
    logger = logging.getLogger('tljh')
    proc = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, *args, **kwargs)
    printable_command = ' '.join(cmd)
    if proc.returncode != 0:
        # Our process failed! Show output to the user
        logger.error('Ran {command} with exit code {code}'.format(
            command=printable_command, code=proc.returncode
        ))
        logger.error(proc.stdout.decode())
        raise subprocess.CalledProcessError(cmd=cmd, returncode=proc.returncode)
    else:
        # This goes into installer.log
        logger.debug('Ran {command} with exit code {code}'.format(
            command=printable_command, code=proc.returncode
        ))
        # This produces multi line log output, unfortunately. Not sure how to fix.
        # For now, prioritizing human readability over machine readability.
        logger.debug(proc.stdout.decode())


def get_plugin_manager():
    """
    Return plugin manager instance
    """
    # Set up plugin infrastructure
    pm = pluggy.PluginManager('tljh')
    pm.add_hookspecs(hooks)
    pm.load_setuptools_entrypoints('tljh')

    return pm