from flask import Flask
import os, smtplib, ssl
from email.message import EmailMessage


app = Flask( 'pywallter' )
app.config.from_pyfile('config.py')



class Mailer:

    def __init__(self):
        self._smtp_server = app.config['SMTP_SERVER']
        self._smtp_port = app.config['SMTP_PORT']
        self._smtp_user = app.config['SMTP_USER']
        self._smtp_passwd = app.config['SMTP_PASSWD']
        self._sender_address = app.config['SENDER_ADDRESS']


    def get_smtp_conf(self):
        print ("Serveur SMTP: _smtp_server")
        
        return self._smtp_server
    
    def send_email(self, receiver_email, subject, message):
        
        mail = EmailMessage()
        mail['Subject'] = subject
        mail['From'] = self._sender_address
        mail['To'] = receiver_email
        mail.set_content(message)
        
        match self._smtp_port:
            case "465":
                self._send_ssl_mail(receiver_email, mail)
            case "587":
                self._send_starttls_mail(receiver_email, mail)
            case "25":
                with smtplib.SMTP(self._smtp_server, self._smtp_port) as server:
                    server.login(self._smtp_user, self._smtp_password)
                    server.sendmail(self._sender_address, receiver_email, mail.as_string())
            case _:
                print ("There are problem with mail port configuration ")
            

    def _send_starttls_mail(self, receiver_email, mail):

        context = ssl.create_default_context()
        with smtplib.SMTP(self._smtp_server, self._smtp_port) as server:
            server.ehlo()  # Can be omitted
            server.starttls(context=context)
            server.ehlo()  # Can be omitted
            server.login(self._smtp_user, self._smtp_passwd)
            server.sendmail(self._sender_address, receiver_email, mail.as_string())



    def _send_ssl_mail(receiver_email, mail):
    
        context = ssl.create_default_context()
        with smtplib.SMTP(self._smtp_server, self._smtp_port) as server:

            server.login(sender_email, password)
            server.sendmail(self._sender_address, receiver_email, mail.as_string())