# Copyright (c) 2022 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Initialize Flask app."""
from flask import Flask
from flask_assets import Environment


def init_app():
    """Construct core Flask application with embedded Dash app."""
    app = Flask(__name__, instance_relative_config=False)
    app.config.from_object("config.Config")
    assets = Environment()
    assets.init_app(app)

    with app.app_context():
        # Import parts of our core Flask app.
        from . import routes
        from .assets import compile_static_assets

        # Import Trending Dash application.
        from .trending.dashboard import init_dashboard

        app = init_dashboard(app)

        # Compile static assets.
        compile_static_assets(assets)

        return app