'''
Created on 6 juil. 2017

@author: olivier.massot
'''
from datetime import datetime
from email.mime.text import MIMEText
import logging.config
import smtplib
import sys

from path import Path
import yaml

LOG_DIR = Path(r"%appdata%\logs").expandvars()
LOG_DIR.makedirs_p()

SYS_EXCEPT_HOOK = sys.excepthook

def start(name="main", level=0, filename=""):
    # charge la configuration du logging depuis le fichier 'logging.yaml'
    configfile = Path(__file__).parent
    with open(configfile / 'logging.yaml', 'rt') as f:
        conf = yaml.load(f)

    if level:
        conf["loggers"][name]["level"] = level

    if not filename:
        filename = LOG_DIR / r'{}_{:%Y%m%d_%H%M}.log'.format(name, datetime.now())
    conf["handlers"]["file"]["filename"] = filename

    logging.config.dictConfig(conf)

    logger = logging.getLogger(name)
    logger.info("Log start written at {}".format(filename))

class BufferingSMTPHandler(logging.handlers.BufferingHandler):
    def __init__(self, mailhost, fromaddr, toaddrs, subject, capacity):
        logging.handlers.BufferingHandler.__init__(self, capacity)
        self.mailhost = mailhost
        self.mailport = None
        self.fromaddr = fromaddr
        self.toaddrs = toaddrs
        self.subject = subject

    def flush(self):
        try:
            if len(self.buffer) > 0:
                port = self.mailport if self.mailport else smtplib.SMTP_PORT

                msg = "\n".join([self.format(record) for record in self.buffer])
                msg = MIMEText(msg.encode('utf-8'), _charset='utf-8')
                msg['Subject'] = self.subject
                msg['From'] = self.fromaddr
                msg['To'] = ",".join(self.toaddrs)

                smtp = smtplib.SMTP(self.mailhost, port)
                smtp.sendmail(self.fromaddr, self.toaddrs, msg.as_string())
                smtp.quit()
                self.buffer = []
        except Exception as e:
            print(e)
            raise