from django.views.generic.base import ContextMixin
from django.template.loader import render_to_string
from django.template.exceptions import TemplateDoesNotExist
from django.core.mail import EmailMultiAlternatives
from django.conf import settings

from html.parser import HTMLParser

from bs4 import BeautifulSoup

class MailView(ContextMixin):
    def __init__(self, template_name=None, html_template_name=None, text_template_name=None):
        self.html_template_name = html_template_name
        self.text_template_name = text_template_name

        if template_name:
            self._template_name = template_name

            if len(template_name.split("/")[-1].split(".")[-1] in ("html", "txt")):
                basename = template_name.rsplit(".", 1)[0]
            else:
                basename = template_name

            for ext in ("html", "txt"):
                try:
                    path = f"{basename}.{ext}"
                    render_to_string(path)
                    if ext == "html":
                        self.html_template_name = self.html_template_name or path
                    else:
                        self.text_template_name = self.text_template_name or path
                except TemplateDoesNotExist:
                    pass

    def render_to_html(self, **kwargs):
        if self.html_template_name:
            context = self.get_context_data(**kwargs)
            return render_to_string(self.html_template_name, context)
        else:
            return None

    def render_to_text(self, from_html=False, **kwargs):
        if self.text_template_name:
            context = self.get_context_data(**kwargs)
            return render_to_string(self.text_template_name, context)
        else:
            if from_html and (html := self.render_to_html(**kwargs)):
                return BeautifulSoup(html).get_text()

        return None

    def send(self, subject, recipient, context={}, attachments=[], sender=None, cc=[], bcc=[], text_from_html=False):
        text = self.render_to_text(text_from_html, **context)
        email = EmailMultiAlternatives(subject, text, sender, [recipient], cc=cc, bcc=bcc + DEFAULT_BCC_EMAILS, attachments=attachments)
        if html := self.render_to_html(**context):
            email.attach_alternative(html, "text/html")
        email.send()