import arrow
from flask import request, flash, render_template
from flask_wtf import FlaskForm
from wtforms import StringField, validators

from app import email_utils
from app.auth.base import auth_bp
from app.config import URL
from app.email_utils import notify_admin
from app.extensions import db
from app.log import LOG
from app.models import User, ActivationCode, PlanEnum, GenEmail
from app.utils import random_string, encode_url


class RegisterForm(FlaskForm):
    email = StringField("Email", validators=[validators.DataRequired()])
    password = StringField(
        "Password", validators=[validators.DataRequired(), validators.Length(min=8)]
    )
    name = StringField("Name", validators=[validators.DataRequired()])


@auth_bp.route("/register", methods=["GET", "POST"])
def register():
    form = RegisterForm(request.form)

    if form.validate_on_submit():
        user = User.filter_by(email=form.email.data).first()

        if user:
            flash(f"Email {form.email.data} already exists", "warning")
            return render_template("auth/register.html", form=form)

        LOG.debug("create user %s", form.email.data)
        user = User.create(email=form.email.data, name=form.name.data)
        user.set_password(form.password.data)

        # by default new user will be trial period
        user.plan = PlanEnum.trial
        user.plan_expiration = arrow.now().shift(days=+15)
        db.session.flush()

        # create a first alias mail to show user how to use when they login
        GenEmail.create_new_gen_email(user_id=user.id)
        db.session.commit()

        send_activation_email(user)
        notify_admin(
            f"new user signs up {user.email}", f"{user.name} signs up at {arrow.now()}"
        )

        return render_template("auth/register_waiting_activation.html")

    return render_template("auth/register.html", form=form)


def send_activation_email(user):
    activation = ActivationCode.create(user_id=user.id, code=random_string(30))
    db.session.commit()

    # Send user activation email
    activation_link = f"{URL}/auth/activate?code={activation.code}"
    if "next" in request.args:
        LOG.d("redirect user to %s after activation", request.args["next"])
        activation_link = activation_link + "&next=" + encode_url(request.args["next"])

    email_utils.send(
        user.email,
        f"Welcome to SimpleLogin {user.name} - just one more step!",
        html_content=f"""
                Welcome to SimpleLogin! <br><br>

Our mission is to make the login process as smooth and as secure as possible. This should be easy. <br><br>

To get started, we need to confirm your email address, so please click this <a href="{activation_link}">link</a> 
to finish creating your account. Or you can paste this link into your browser: <br><br>

{activation_link} <br><br>

Your feedbacks are very important to us. Please feel free to reply to this email to let us know any 
of your suggestion! <br><br>

Thanks! <br><br>

SimpleLogin team.
            
            """,
    )