from flask import Flask,request,current_app
from flask_mail import Mail
from flask_moment import Moment
from config import Config
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_login import LoginManager
import logging 
from logging.handlers import SMTPHandler,RotatingFileHandler
import os 
from flask_bootstrap import Bootstrap
from flask_babel import Babel, lazy_gettext as _l
from elasticsearch import Elasticsearch
from redis import Redis
import rq
from flask_cors import CORS


db=SQLAlchemy()
migrate=Migrate()
login=LoginManager()
login.login_view='auth.login'
login.login_message = _l('Please log in to access this page.')
mail=Mail()
bootstrap=Bootstrap()
moment=Moment()
babel=Babel()


def create_app(config_class=Config):
	app=Flask(__name__)
	CORS(app)
	app.config.from_object(config_class)
	app.config['MAIL_USE_TLS']=False


	db.init_app(app)
	migrate.init_app(app,db)
	login.init_app(app)
	mail.init_app(app)
	bootstrap.init_app(app)
	moment.init_app(app)
	babel.init_app(app)
	app.elasticsearch=Elasticsearch([app.config['ELASTICSEARCH_URL']]) if app.config['ELASTICSEARCH_URL'] else None
	app.redis=Redis.from_url(app.config['REDIS_URL'])
	app.task_queue=rq.Queue('SocialApp-tasks',connection=app.redis)
	
	from app.errors import bp as errors_bp
	app.register_blueprint(errors_bp)

	from app.auth import bp as auth_bp
	app.register_blueprint(auth_bp,url_prefix='/auth')

	from app.main import bp as main_bp
	app.register_blueprint(main_bp)

	from app.api import bp as api_bp
	app.register_blueprint(api_bp,url_prefix='/api')


	if not app.debug and not app.testing:
		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=()
			mail_handler=SMTPHandler(
				mailhost=(app.config['MAIL_SERVER'], app.config['MAIL_PORT']),
				fromaddr='no-reply@' + app.config['MAIL_SERVER'],
				toaddrs=app.config['ADMINS'], subject='App Failure',
				credentials=auth, secure=secure)
			mail_handler.setLevel(logging.ERROR)
			app.logger.addHandler(mail_handler)

		if app.config['LOG_TO_STDOUT']:
			stream_handler = logging.StreamHandler()
			stream_handler.setLevel(logging.INFO)
			app.logger.addHandler(stream_handler)
		else:
			if not os.path.exists('logs'):
				os.mkdir('logs')
			file_handler=RotatingFileHandler('logs/SocialApp.log',maxBytes=10240,backupCount=10)
			file_handler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'))
			file_handler.setLevel(logging.INFO)
			app.logger.addHandler(file_handler)

		app.logger.setLevel(logging.INFO)
		app.logger.info('SocialApp Startup')

	return app

@babel.localeselector
def get_local():
	return request.accept_languages.best_match(current_app.config['LANGUAGES'])


from app import models
