"""Entry point from spinning up flask"""
import os

from typing import Dict
from typing import Union
from flask import Flask
from gn3.api.gemma import gemma
from gn3.api.general import general
from gn3.api.correlation import correlation
from gn3.api.traits import trait
from gn3.api.datasets import dataset


def create_app(config: Union[Dict, str, None] = None) -> Flask:
    """Create a new flask object"""
    app = Flask(__name__)
    # Load default configuration
    app.config.from_object("gn3.settings")

    # Load environment configuration
    if "GN3_CONF" in os.environ:
        app.config.from_envvar('GN3_CONF')

    # Load app specified configuration
    if config is not None:
        if isinstance(config, dict):
            app.config.update(config)
        elif config.endswith(".py"):
            app.config.from_pyfile(config)
    app.register_blueprint(general, url_prefix="/api/")
    app.register_blueprint(gemma, url_prefix="/api/gemma")
    app.register_blueprint(correlation, url_prefix="/api/correlation")
    app.register_blueprint(trait, url_prefix="/api/trait")
    app.register_blueprint(dataset, url_prefix="/api/dataset")
    return app