'''

    Logging handler for QGis

@author: olivier.massot, 2018
'''
import logging

from qgis.core import QgsMessageLog

_to_qgis_level = {logging.DEBUG: 0, 
                  logging.INFO: 0, 
                  logging.WARNING: 1,
                  logging.ERROR: 2,
                  logging.CRITICAL: 2, 
                  logging.NOTSET: 4}


class QgsLogHandler(logging.Handler):
    
    _qgs_iface = None

    @classmethod
    def connect_to_iface(cls, iface):
        cls._qgs_iface = iface

    def emit(self, record):
        try:
            msg = self.format(record)
            level = record.levelno
            
            QgsMessageLog.logMessage(msg, "Mnheck", _to_qgis_level[level])
            
            if self._qgs_iface and record.levelno >= logging.WARNING:
                self._qgs_iface.messageBar().pushMessage("MnCheck", msg, level=_to_qgis_level[level])
            
        except (KeyboardInterrupt, SystemExit):
            raise
        except:
            self.handleError(record)