"""Provide basic settings and views"""

import fileinput
import re
from pathlib import Path
from flask import request, render_template
from flask_basicauth import BasicAuth
from autoreply_editor import app

basic_auth = BasicAuth(app)

qmail_prefix = f"{str(Path.home())}/.qmail-"
maildrop_line = "|maildrop $HOME/.filter-autoreply"

def qmail_status(user):
    """Find out whether the filter is currently activated for the given mail user"""
    with open(f"{qmail_prefix}{user}", encoding="utf8") as dotqmail:
        # TODO: RE not necessary here
        if not re.search(
            r"^\|maildrop \$HOME/\.filter-autoreply$", dotqmail.read(), re.MULTILINE
        ):
            return False
        else:
            return True


@app.route("/")
def index():
    with open(app.config.get("MESSAGE_FILE"), "r", encoding="utf-8") as messagefile:
        message = messagefile.read()

    return render_template(
        "index.html",
        message=message,
        qmail_status=qmail_status(app.config.get("MAIL_USER")),
    )


@app.route("/", methods=["POST"])
def index_post():
    if request.method == "POST":
        if request.form["action"] == "message":
            input_message = request.form["message"]
            with open(
                app.config.get("MESSAGE_FILE"), "w", encoding="utf-8"
            ) as messagefile:
                messagefile.write(str(input_message))
                result = "Success: The autoreply message has been updated!"

        if request.form["action"] == "qmail":
            # define whether to set a comment
            if request.form["status"] == "on":
                preis = "#"
                preshould = ""
            else:
                preis = ""
                preshould = "#"

            with fileinput.FileInput(
                f"{qmail_prefix}{app.config.get('MAIL_USER')}",
                inplace=True,
                backup=".bak",
            ) as dotqmail:
                for line in dotqmail:
                    print(
                        line.replace(
                            f"{preis}{maildrop_line}", f"{preshould}{maildrop_line}"
                        ),
                        end="",
                    )

            result = f"Success: the autoreply is now {request.form['status']}."

    try:
        return render_template("result.html", result=result)
    except UnboundLocalError:
        return render_template("result.html", result="Something went terribly wrong!")