"""
Log wrapper
"""
import sys

__all__ = [
    'log'
]

LOG_DEBUG    = 7
LOG_INFO     = 6
LOG_NOTICE   = 5
LOG_USER     = 4
LOG_WARN     = 3
LOG_ERR      = 2
LOG_CRIT     = 1
LOG_EMERG    = 0

#---
# Internals
#---

class _VxLogger():
    def __init__(self, logfile=None):
        self._logfile = logfile
        self._level = LOG_USER
        self._indent = 0

    #---
    # Internals
    #---

    def _print(self, level, text, skip_indent, fileno):
        if self._level < level:
            return 0
        if not skip_indent and self._level == LOG_DEBUG and self._indent > 0:
            text = ('>>> ' * self._indent) + text
        print(text, file=fileno, end='', flush=True)
        return len(text) + 1

    #---
    # Public properties
    #---

    @property
    def level(self):
        """ <property> handle print level """
        return self._level

    @level.setter
    def level(self, level):
        """ <property> handle print level """
        if level < LOG_EMERG or level > LOG_DEBUG:
            print(f"[log] level update to {level} is not possible, ignored")
            return
        self._level = level

    @property
    def indent(self):
        """ <property> handle indentation level for LOG_DEBUG """
        return self._indent

    @indent.setter
    def indent(self, indent):
        """ <property> handle indentation level for LOG_DEBUG """
        if indent < 0:
            print(f"[log] indent update to {indent} is not possible, ignored")
            return
        self._indent = indent

    #---
    # Public methods
    #---

    def debug(self, text, end='\n', skip_indent=False):
        """ print debug log """
        return self._print(LOG_DEBUG, text + end, skip_indent, sys.stdout)

    def info(self, text, end='\n', skip_indent=False):
        """ print info log """
        return self._print(LOG_INFO, text + end, skip_indent, sys.stdout)

    def notice(self, text, end='\n', skip_indent=False):
        """ print notice log """
        return self._print(LOG_NOTICE, text + end, skip_indent, sys.stdout)

    def user(self, text, end='\n', skip_indent=False):
        """ print user log """
        return self._print(LOG_USER, text + end, skip_indent, sys.stdout)

    def warn(self, text, end='\n', skip_indent=False):
        """ print warning log """
        return self._print(LOG_WARN, text + end, skip_indent, sys.stderr)

    def error(self, text, end='\n', skip_indent=False):
        """ print error log """
        return self._print(LOG_ERR, text + end, skip_indent, sys.stderr)

    def critical(self, text, end='\n', skip_indent=False):
        """ print critical log """
        return self._print(LOG_CRIT, text + end, skip_indent, sys.stderr)

    def emergency(self, text, end='\n', skip_indent=False):
        """ print emergency log """
        return self._print(LOG_EMERG, text + end, skip_indent, sys.stderr)





#---
# Public functions
#---

log = _VxLogger()