import datetime
import email
import imaplib
import uuid
from concurrent.futures import ThreadPoolExecutor
from email.header import decode_header
from email.message import Message

from builtins import list
from src.db.mongo_manager import MONGO_STORE_MANAGER
from src.logs.AppLogging import init_logger
from src.mail.mail_constants import DOMAIN_163, DOMAIN_YAHOO, DOMAIN_SINA, IMAP_SERVER_163, YAHOO_IMAP_SERVER, \
    IMAP_SERVER_SINA, AOL_IMAP_SERVER, create_imap
from src.pojo.accepted_appointment_pojo import AcceptedAppointmentPojo
from src.pojo.mail.mail_pojo import MailPojo

INVOICE_SUBJECT_fr = 'Votre facture'
INVOICE_SUBJECT_EN = 'Your invoice'
VALIDATION_URL_REGEX = """https:\/\/rendezvousparis.hermes.com\/client\/register\/[A-Z0-9]+\/validate.code=[A-Z0-9]+"""
HERMES_INVOICE_EMAIL = "no-reply@hermes.com"

date_format = "%d-%b-%Y"  # DD-Mon-YYYY e.g., 3-Mar-2014


class InvoiceGetter():
    def __init__(self, login, password):
        self.login = login
        self.password = password

    @staticmethod
    def show_folders(imap):
        for i in imap.list()[1]:
            l = i.decode().split(' "/" ')
            print(l[0] + " = " + l[1])


    def read_emails(self, mails_messages: list) -> list:
        imap = create_imap(self.login)

        # authenticate
        type, dat = imap.login(self.login, self.password)
        mail_list = []
        print("read mails from {}".format(self.login))
        # self.show_folders(imap)
        # total number of emails
        # get mails from inbox
        # (\Archive \HasNoChildren) = "Archive"
        # (\Junk \HasNoChildren) = "Bulk"
        # (\Drafts \HasNoChildren) = "Draft"
        # (\HasNoChildren) = "Inbox"
        # (\Sent \HasNoChildren) = "Sent"
        # (\Trash \HasNoChildren) = "Trash"
        mail_list.extend(self._get_messages_from_folder(imap, subject=INVOICE_SUBJECT_fr))
        mail_list.extend(self._get_messages_from_folder(imap, subject=INVOICE_SUBJECT_EN))
        # mail_list.extend(self._get_messages_from_folder(imap, folder="Bulk"))
        # close the connection and logout
        imap.close()
        imap.logout()
        mails_messages.extend(mail_list)
        return mail_list

    def _get_messages_from_folder(self, imap, subject, folder="INBOX") -> list:
        imap.select(folder)
        mail_messages = []
        typ, data = imap.search(None, '(SUBJECT "{}" SINCE "{}")'.format(subject, datetime.datetime.today().strftime(
            date_format)))
        for i in data[0].split():
            # fetch the email message by ID
            res, msg = imap.fetch(i.decode("utf-8"), "(RFC822)")
            body = ''
            for response in msg:
                if isinstance(response, tuple):
                    # parse a bytes email into a message object
                    msg = email.message_from_bytes(response[1])
                    # decode the email subject
                    subject, subject_encoded = decode_header(msg["Subject"])[0]
                    received_date = msg["Date"]
                    if isinstance(subject, bytes):
                        # if it's a bytes, decode to str
                        subject = subject.decode(subject_encoded)
                    # decode email sender
                    from_address, subject_encoded = decode_header(msg.get("From"))[0]
                    if isinstance(from_address, bytes):
                        from_address = from_address.decode(subject_encoded)
                    print("From:", from_address)
                    print("Subject:", subject)
                    # if the email message is multipart
                    if msg.is_multipart():
                        # iterate over email parts
                        for part in msg.walk():
                            try:
                                # get the email body
                                payloads = part.get_payload()
                                if isinstance(payloads, list):
                                    for payload in payloads:
                                        if isinstance(payload, Message):
                                            if payload.get_content_type() == 'text/html':
                                                body = body + payload.get_payload(decode=True).decode("iso-8859-1")
                                            elif payload.get_content_type() == 'application/pdf':
                                                #                 save to pdf
                                                open("./" + self.login + str(uuid.uuid4()) + '.pdf', 'wb').write(
                                                    payload.get_payload(decode=True))

                                # print(body)
                            except Exception as Error:
                                print(Error)
                    else:
                        body = msg.get_payload(decode=True).decode()
                        print(body)
                    if INVOICE_SUBJECT_fr in subject or INVOICE_SUBJECT_EN in subject:
                        mail = MailPojo(subject=subject, body=body, from_address=from_address)
                        mail_messages.append(mail)
        return mail_messages


def get_invoices():
    # get email address
    mail_list = MONGO_STORE_MANAGER.get_destination_emails()
    mail_list_to_check = []
    # yesterday = str(datetime.date.today() - datetime.timedelta(days=2))
    yesterday = str(datetime.date.today())
    collection = MONGO_STORE_MANAGER.get_accepted_items_for_one_day(yesterday)
    for valid_appointment in collection:
        accepted_pojo = AcceptedAppointmentPojo.from_reserve(valid_appointment)
        for mail in mail_list:
            if mail.mail == accepted_pojo.email:
                mail_list_to_check.append(mail)
    # mail_list = [mail_address1]
    mails_messages = []
    with ThreadPoolExecutor(max_workers=20) as executor:
        for mail in mail_list_to_check:
            # check whether we need to read mail
            mail_reader = InvoiceGetter(mail.mail, mail.password)
            executor.submit(mail_reader.read_emails, mails_messages)


# check whether the url has already been clicked
if __name__ == '__main__':
    init_logger()
    get_invoices()