import os

from flask import Flask
from flask_atlas_auth import AuthManager
from sqlalchemy.schema import CreateSchema

from src import config
from src.admin import init_app
from src.config import SQLALCHEMY_DATABASE_URI
from src.db import db, migrate


def create_app():
    app = Flask(__name__)

    app.secret_key = os.environ.get("SECRET_KEY", "SECRET KEY")
    app.config.from_object(config)
    app.config["ADMIN_RAISE_ON_INTEGRITY_ERROR"] = True
    app.config["SQLALCHEMY_DATABASE_URI"] = SQLALCHEMY_DATABASE_URI
    app.config["FLASK_ADMIN_SWATCH"] = "slate"

    init_app(app)

    db.init_app(app)
    migrate.init_app(app, db, render_as_batch=True, include_schemas=True)
    with app.app_context():
        engine = db.get_engine()
        if not engine.dialect.has_schema(engine, 'dna'):
            engine.execute(CreateSchema('dna'))

    auth_manager = AuthManager()
    auth_manager.init_app(app)
    return app


app = create_app()