import click
from email_validator import validate_email
from flask_security.utils import hash_password

from advlabdb import create_app, data_dir, user_datastore
from advlabdb.model_independent_funs import randomPassword
from advlabdb.models import MAX_YEAR, MIN_YEAR, Admin, Semester, db


# Class to validate email in click.prompt
class EmailParamType(click.ParamType):
    def convert(self, value, param, ctx):
        try:
            return validate_email(value).email
        except Exception:
            self.fail(f"{value} is not a valid email!", param, ctx)


def _init_db(manage):
    db_file = data_dir / "db/advlab.db"
    if db_file.is_file():
        click.echo(f"Skipping database initialization because the database does already exist at {db_file}.")
        return

    app = create_app(create_for_server=False)

    with app.app_context():
        with db.session.begin():
            # Create new database
            db.create_all()

            semester_label = click.prompt(
                "Enter the label of the current semester",
                type=click.Choice(("SS", "WS")),
            )
            semester_year = click.prompt(
                f"Enter the year of the current semester (between {MIN_YEAR} and {MAX_YEAR})",
                type=click.IntRange(MIN_YEAR, MAX_YEAR),
            )

            semester = Semester(label=semester_label, year=semester_year)

            db.session.add(semester)

            adminRole = user_datastore.create_role(name="admin")
            user_datastore.create_role(name="assistant")

            manage.box("The first admin account will be created now.")

            admin_email = click.prompt(
                "Enter the admin's email address",
                type=EmailParamType(),
            )

            admin_first_name = click.prompt("Enter the admin's first name")
            admin_last_name = click.prompt("Enter the admin's last name")
            admin_phone_number = click.prompt(
                "Enter the admin's phone number (optional)", default="", show_default=False
            )
            admin_mobile_phone_number = click.prompt(
                "Enter the admin's mobile phone number (optional)", default="", show_default=False
            )
            admin_building = click.prompt("Enter the admin's building (optional)", default="", show_default=False)
            admin_room = click.prompt("Enter the admin's room (optional)", default="", show_default=False)

            admin_password = randomPassword()
            admin_hashed_password = hash_password(admin_password)

            admin_user = user_datastore.create_user(
                email=admin_email,
                password=admin_hashed_password,
                roles=[adminRole],
                first_name=admin_first_name.strip(),
                last_name=admin_last_name.strip(),
                phone_number=admin_phone_number.strip() or None,
                mobile_phone_number=admin_mobile_phone_number.strip() or None,
                building=admin_building.strip() or None,
                room=admin_room.strip() or None,
                active_semester=semester,
            )

            admin = Admin(user=admin_user)

            db.session.add(admin)

    manage.box(f"Admin password: {admin_password}")

    click.echo(click.style("Done database initialization!", fg="green"))