from flask import Flask
from config import Config
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_bootstrap import Bootstrap
import logging
from logging.handlers import SMTPHandler, RotatingFileHandler
import os

app = Flask(__name__)
app.config.from_object(Config)
db = SQLAlchemy(app)
migrate = Migrate(app, db)
bootstrap = Bootstrap(app)


from app import routes, models, errors, database_cleaner

if not app.debug:
    # Mail errors
    if app.config['MAIL_SERVER']:
        auth = None
        if app.config['MAIL_USERNAME'] or app.config['MAIL_PASSWORD']:
            auth = (app.config['MAIL_USERNAME'], app.config['MAIL_PASSWORD'])
        secure = None
        if app.config['MAIL_USE_TLS']:
            secure = () # The secure argument is an empty tuple to use TLS without providing a specific certificate and key.
        mail_handler = SMTPHandler(
                mailhost=(app.config['MAIL_SERVER'], app.config['MAIL_PORT']),
                fromaddr='no-reply@' + app.config['MAIL_SERVER'],
                toaddrs=app.config['ADMINS'], subject='Microblog Failure',
                credentials=auth, secure=secure)
        mail_handler.setLevel(logging.ERROR)
        app.logger.addHandler(mail_handler)
    # Log to File
    if not os.path.exists('logs'):
        os.mkdir('logs')
    file_handler = RotatingFileHandler('logs/linkshortener.log', maxBytes=10240, backupCount=10)
    file_handler.setFormatter(logging.Formatter(
        '%(asctime)s %(levelname)s: %(message)s'))
    file_handler.setLevel(logging.INFO)
    app.logger.addHandler(file_handler)

    app.logger.setLevel(logging.INFO)
    app.logger.info('Link Shortener startup')

database_cleaner.start_scheduler()