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

from typing import Dict
from typing import Union

from flask import Flask
from flask_cors import CORS

from gn3.api.gemma import gemma
from gn3.api.rqtl import rqtl
from gn3.api.general import general
from gn3.api.heatmaps import heatmaps
from gn3.api.correlation import correlation
from gn3.api.data_entry import data_entry

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")

    CORS(
        app,
        origins=app.config["CORS_ORIGINS"],
        allow_headers=app.config["CORS_HEADERS"],
        supports_credentials=True, intercept_exceptions=False)

    # 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(rqtl, url_prefix="/api/rqtl")
    app.register_blueprint(heatmaps, url_prefix="/api/heatmaps")
    app.register_blueprint(correlation, url_prefix="/api/correlation")
    app.register_blueprint(data_entry, url_prefix="/api/dataentry")
    return app