import datetime
import smtplib
import os
import logging

from sim.config import Configuration
import ssl

config = Configuration()


class Emailer():

    def __init__(self, hostname, port, auth_user, auth_pass):
        self.hostname = hostname
        self.port = port
        self.auth_user = auth_user
        self.auth_pass = auth_pass
        self.logger = logging.getLogger(__name__)

    def read_template(self, filename):
        from string import Template

        with open(filename, 'r', encoding='utf-8') as template_file:
            template_file_content = template_file.read()
        return Template(template_file_content)

    def send_success_email(self, from_address, to_address, alert_message, subject, type=None, report_count=0):

        from email.mime.multipart import MIMEMultipart
        from email.mime.text import MIMEText

        self.logger.info("Preparando para enviar correo electrónico")

        head_color = "#6bab01"

        message_template = self.read_template(os.path.join(config.TEMPLATES_PATH,'success-message-inline.html'))

        message = message_template.substitute(fecha=datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
                                              alert_message=alert_message,
                                              cuenta_reportes=report_count,
                                              head_color=head_color)

        msg = MIMEMultipart()

        msg['From'] = from_address
        msg['To'] = to_address
        msg['Subject'] = subject

        msg.attach(MIMEText(message, 'html'))
        self.logger.debug("Conectando con el servidor SMTP: {0}".format(self.hostname))
        
        context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
        server = smtplib.SMTP(self.hostname, self.port)
        server.starttls(context=context)
        server.login(self.auth_user,self.auth_pass)
        
        self.logger.debug("Enviando correo electrónico")
        server.sendmail(msg['From'], msg['To'], msg.as_string())
        self.logger.debug("Correo Electrónico enviado")
        self.logger.debug("Desconectando del servidor SMTP")
        server.quit()
        self.logger.info("Correo electrónico enviado con éxito a la dirección {0}".format(to_address))

    def send_warning_email(self, from_address, to_address, alert_message, subject):

        from email.mime.multipart import MIMEMultipart
        from email.mime.text import MIMEText

        self.logger.info("Preparando para enviar correo electrónico")

        head_color = "#ffaa00"

        message_template = self.read_template(os.path.join(config.TEMPLATES_PATH, 'warning-message-inline.html'))

        message = message_template.substitute(fecha=datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
                                              alert_message=alert_message,
                                              head_color=head_color)

        msg = MIMEMultipart()

        msg['From'] = from_address
        msg['To'] = to_address
        msg['Subject'] = subject

        msg.attach(MIMEText(message, 'html'))
        self.logger.debug("Conectando con el servidor SMTP: {0}".format(self.hostname))
        context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
        server = smtplib.SMTP(self.hostname, self.port)
        server.starttls(context=context)
        server.login(self.auth_user,self.auth_pass)
        self.logger.debug("Enviando correo electrónico")
        server.sendmail(msg['From'], msg['To'], msg.as_string())
        self.logger.debug("Correo Electrónico enviado")
        self.logger.debug("Desconectando del servidor SMTP")
        server.quit()
        self.logger.info("Correo electrónico enviado con éxito a la dirección {0}".format(to_address))