"""
Functions dependent on advlabdb.models.
"""

from functools import cache

from flask import flash, url_for
from flask_admin.menu import MenuLink
from flask_security import current_user
from sqlalchemy import select
from wtforms.fields import BooleanField, IntegerField, SelectField, StringField
from wtforms.validators import DataRequired, NumberRange, Optional

from . import app, db
from .models import MAX_MARK, MIN_MARK, Semester


def initActiveSemesterMenuLinks(space):
    with app.app_context():
        try:
            semesters = Semester.sortedSemestersStartingWithNewest()
            for semester in semesters:
                space.add_link(
                    MenuLink(
                        name=str(semester),
                        url=url_for("set_semester") + "?semester_id=" + str(semester.id),
                        category="Active semester",
                    )
                )
        except Exception:
            print(
                "ERROR: The Semester table does not exist yet! Therefore, menu links could not be generated. You can ignore this error if you are just initializing the database."
            )
        else:
            space.add_link(MenuLink(name="Logout", url=url_for("security.logout")))


def active_semester_str():
    active_semester = current_user.active_semester
    active_semester_str = str(active_semester)
    if active_semester != Semester.lastSemester():
        flash(f"You are in the old semester {active_semester_str}!", "warning")

    return active_semester_str


def mark_field(mark_type: str):
    return IntegerField(
        mark_type + " Mark",
        validators=[Optional(), NumberRange(MIN_MARK, MAX_MARK)],
        description=f"Between {MIN_MARK} and {MAX_MARK}.",
    )


@cache
def selection_mark_field_choices():
    choices = [(mark, str(mark)) for mark in range(MAX_MARK, MIN_MARK - 1, -1)]
    choices.insert(0, (-1, "Not set yet"))

    return choices


def selection_mark_field(mark_type: str, default):
    choices = selection_mark_field_choices()

    if default is None:
        default = -1

    return SelectField(
        mark_type + " Mark",
        default=default,
        choices=choices,
        validators=[DataRequired()],
        render_kw={"class": "form-control", "style": "width:auto;"},
    )


def parse_selection_mark_field(field):
    data = int(field.data)
    if data == -1:
        return None

    return data


def user_info_fields():
    phone_number = StringField(
        "Phone Number",
        validators=[Optional()],
    )
    mobile_phone_number = StringField(
        "Mobile Phone Number",
        validators=[Optional()],
    )

    building = StringField(
        "Building",
        validators=[Optional()],
    )
    room = StringField(
        "Room",
        validators=[Optional()],
    )

    return phone_number, mobile_phone_number, building, room


def generate_new_password_field():
    return BooleanField(
        "Generate new random password. For security reasons, it is not possible to manually enter a password. Please use a password manager like Bitwarden or KeepassXC to save the randomly generated password.",
        default=False,
    )