from flask import current_app, redirect, flash
from flask_login import current_user
import flask_sqlalchemy
import flask_migrate
import flask_admin
import flask_babel
import flask_caching
import prometheus_flask_exporter


from flask_admin.contrib.sqla import ModelView as BaseModelView


class AdminSecurityMixin:
    def is_accessible(self):
        return current_user.is_authenticated

    def inaccessible_callback(self, name, **kwargs):
        # redirect to login page if user doesn't have access
        return current_app.login_manager.unauthorized()


class SuperAdminSecurityMixin:
    def is_accessible(self):
        return current_user.is_authenticated and current_user.superadmin

    def inaccessible_callback(self, name, **kwargs):
        flash("Nie dla psa, dla pana to!")
        return redirect('/admin')


class ModelView(AdminSecurityMixin, BaseModelView):
    pass


class ModelViewHighSecurity(SuperAdminSecurityMixin, BaseModelView):
    pass


db = flask_sqlalchemy.SQLAlchemy()
migrate = flask_migrate.Migrate()
admin = flask_admin.Admin(name='Covid-Formity CRM™', template_mode='bootstrap3')
babel = flask_babel.Babel()
metrics = prometheus_flask_exporter.PrometheusMetrics(None, group_by='url_rule')
cache = flask_caching.Cache()