import web
from uuid import uuid4
from views.forms import reset_form, request_reset_form
from views.utils import get_nav_bar, csrf_protected, get_render, password_weakness, sendmail
import models.user
import logging
import bcrypt

logger = logging.getLogger(__name__)


class RequestReset:
    def GET(self):
        session = web.ctx.session
        nav = get_nav_bar(session)

        return get_render().reset_request(nav, request_reset_form, "")

    @csrf_protected
    def POST(self):
        session = web.ctx.session
        nav = get_nav_bar(session)
        data = web.input(username="", email="")
        render = get_render()

        user = models.user.get_user(data.username)
        if user and user[2] == data.email:
            password = uuid4().hex
            password_hash = bcrypt.hashpw(password.encode('UTF-8'), bcrypt.gensalt())
            models.user.set_temporary_password(user[0], password_hash)

            sendmail(
                'Reset your Beelance password',
                """Hi!

Someone requested a password reset for your account. If you didn't request this, you can ignore this email.

If you want to reset your password, log in with this password: {password}
Then you will be able to set a new password.
""".format(password=password),
                "",
                data.email,
            )

            logger.info("User %s requested a password reset", data.username)
        else:
            logger.info("Incorrect reset request with username %s and email %s", data.username, data.email)

        return render.reset_request(nav, request_reset_form, "An email has been sent, if the username and email is correct")


class Reset:
    def GET(self):
        session = web.ctx.session
        nav = get_nav_bar(session)
        render = get_render()

        if 'temporary_userid' not in session or not session.temporary_userid:
            return render.reset(nav, reset_form, "Something went wrong. Try logging in with the temporary password again.")
        return get_render().reset(nav, reset_form, "")

    @csrf_protected
    def POST(self):
        session = web.ctx.session
        nav = get_nav_bar(session)
        data = web.input(temporary="", password="", repeat="")
        render = get_render()

        if 'temporary_userid' not in session or not session.temporary_userid:
            return render.reset(nav, reset_form, "Something went wrong. Try logging in with the temporary password again.")

        userid = session.temporary_userid
        username = models.user.get_user_name_by_id(userid)
        user = models.user.get_user(username)
        temporary_password = user[4]

        # Check that the temporary password is correct
        if not bcrypt.checkpw(data.temporary.encode('UTF-8'), temporary_password.encode('UTF-8')):
            return render.reset(nav, reset_form, "Incorrect temporary password")

        # Check that the passwords match
        if data.password != data.repeat:
            return render.reset(nav, reset_form, "The repeated password doesn't match the first")

        # Check password security
        weakness = password_weakness(data.password, username)
        if weakness is not None:
            return render.reset(nav, reset_form, weakness)

        # Set the new password and log the user in
        password_hash = bcrypt.hashpw(data.password.encode('UTF-8'), bcrypt.gensalt())
        models.user.set_password(userid, password_hash)
        models.user.set_temporary_password(userid, "")

        session.temporary_userid = None

        logger.info("User %s has changed their password", username)

        return get_render().reset(nav, reset_form, "Your password has been reset. You can log in again now.")