import queue
from src.email.functions import connect, check_inbox
import time
from types import SimpleNamespace
from src.worker import Worker
from bs4 import BeautifulSoup
import re
import email.utils
from src.communication import Message


class Obtenedor(Worker):
    """
    Trabajador que obtiene la lista de correos
    """
    def __init__(self, configs, params):
        super(Obtenedor, self).__init__(configs, params)

        self.url = configs.get('email.imap.server')
        self.port = configs.get('email.imap.port')
        user = {'user': '', 'password': ''}
        self.user = SimpleNamespace(**user)
        self.user.name = configs.get('email.imap.user.name')
        self.user.password = configs.get('email.imap.user.password')
        self.ssl = configs.get('email.imap.ssl')

        self.revisados = []

        self.queue = params['queues']['emails']
        self.frec = configs.get('supervisor.wait')

    def is_revisado(self, uid):
        return uid in self.revisados

    def add_revisado(self, uid):
        if self.is_revisado(uid):
            return
        self.revisados.append(uid)

    def build_message(self, email_part):
        output = []
        if email_part.is_multipart():
            for part in email_part.get_payload():
                output += self.build_message(part)
        else:
            html = email_part.get_payload(decode=True)
            bs = BeautifulSoup(html, 'html.parser')
            if bs.body:
                html = bs.body.get_text()
            else:
                html = bs.get_text()
            html = re.sub(' +', ' ', re.sub("\n+", ' ', html)).strip(' ')
            output.append(html)
        return output

    def run(self) -> None:
        self.logger.log('Starting', type(self))
        self.diary.put({'action': 'Inicio de turno de Obtenedor'})
        while not self.stop.is_set():
            e = 0
            with connect(self.url, self.port, self.user.name, self.user.password, self.ssl) as imap:
                self.logger.log('Getting emails', type(self))
                emails = check_inbox(imap)
                if emails is None:
                    self.logger.log('No emails found', type(self))
                    continue
                for em in emails:
                    if self.is_revisado(em.uid):
                        continue
                    sender = em.message['from']
                    text = ' '.join([em.message['subject'] + '.'] + self.build_message(em.message))
                    msg = Message('email', text=text, original=em, sender=sender,
                                  datetime=email.utils.parsedate_to_datetime(em.message['Date']))
                    self.queue.put(msg)
                    self.add_revisado(em.uid)
                    e += 1
            self.logger.log('{0} new emails found'.format(e), type(self))
            self.diary.put({'action': 'Obtenidos{0} correos nuevos'.format(e)})
            time.sleep(self.frec)
        self.logger.log('Exiting', type(self))
        self.diary.put({'action': 'Terminando el turno de Obtenedor'})


class Validador(Worker):
    def __init__(self, configs, params):
        super(Validador, self).__init__(configs, params)

        self.emails = params['queues']['emails']
        self.validos = params['queues']['valid']
        self.invalidos = params['queues']['invalid']
        self.bosses = params['bosses']

        self.frec = configs.get('supervisor.wait')

    def run(self):
        self.logger.log('Starting', type(self))
        self.diary.put({'action': 'Inicio de turno de Validador'})
        while not self.stop.is_set():
            try:
                em = self.emails.get(timeout=self.frec)
            except queue.Empty:
                continue

            if not self.bosses.is_boss(em.sender):
                self.invalidos.put(em)
                continue
            self.validos.put(em)
        self.logger.log('Exiting', type(self))
        self.diary.put({'action': 'Terminando el turno de Validador'})


class Confirmador(Worker):
    def __init__(self, configs, params):
        super(Confirmador, self).__init__(configs=configs, params=params)

        self.invalidos = params['queues']['invalid']
        self.frec = configs.get('supervisor.wait')

    def crear_mega_mensaje(self):
        pass

    def run(self) -> None:
        self.logger.log('Starting', type(self))
        while not self.stop.is_set():
            try:
                em = self.invalidos.get(self.frec)
            except queue.Empty:
                pass
        self.logger.log('Exiting', type(self))