from flask import Flask
from flask_session import Session
from flask_sqlalchemy import SQLAlchemy
from flask_bcrypt import Bcrypt
from flask_login import LoginManager
from flask_mail import Mail
from flask_migrate import Migrate
from minibase.config import AppConfig

# (DATABASE) Definition
db = SQLAlchemy()

# (PASSWORD) Hashing Module to save paswords safely
bcrypt = Bcrypt()

# (LOGIN) Login manage plugin configuration
login_manager = LoginManager()
login_manager.login_view = 'user.login'        # User management (current_user) 
login_manager.login_message_category = 'info'   # Boostrap Info Message

# (EMAIL AGENT) Definition
mail = Mail() # So that we can send mails

# (SESSION) Starts the curren flask session
session = Session()


def create_app():
    # (APP) Definition
    app = Flask(__name__)
    # (APP) Configure configuration
    app.config.from_object(AppConfig)
    # (DATABASE) Initialisation
    db.init_app(app)
    # (PASSWORD) Initialisation
    bcrypt.init_app(app)
    # (LOGIN) Initialisation
    login_manager.init_app(app)
    # (EMAIL AGENT) Initialisation
    mail.init_app(app)
    # Session for variable manipulation on server side
    
    # (DATABASE) Linking the app and the Database
    Migrate(app, db)
 
    # (BLUEPRINTS) Importing the blueprints. 
    # Include are made here to awoid the Circular import issues
    from minibase.blueprints.main.routes import main
    from minibase.blueprints.user.routes import user
    from minibase.blueprints.errors.routes import errors
    from minibase.blueprints.company.routes import company
    from minibase.blueprints.geography.routes import geography
    
    # (BLUEPRINTS) Registering the blueprints. 
    # Giving them theie ulr_prefixes that will define their links on the webBrowser.
    app.register_blueprint(main, url_prefix='/')
    app.register_blueprint(user, url_prefix='/user')
    app.register_blueprint(errors, url_prefix='/errors')
    app.register_blueprint(company, url_prefix='/company')
    app.register_blueprint(geography, url_prefix='/geography')

    # (APP) Returning the initialised app 
    return app