#!/usr/bin/env python3
"""
A Flask-based questing platform.
"""
import os
import time

from flask import Flask
from flask_paranoid import Paranoid
from flask_session import Session
from flask_socketio import SocketIO

from events import socketio
from views import views

class ReverseProxied(object):
	"""
	Wrap the application in this middleware and configure the 
	front-end server to add these headers, to let you quietly bind 
	this to a URL other than / and to an HTTP scheme that is 
	different than what is used locally.

	In nginx:
	location /myprefix {
		proxy_pass http://192.168.0.1:5001;
		proxy_set_header Host $host;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		proxy_set_header X-Scheme $scheme;
		proxy_set_header X-Script-Name /myprefix;
		}

	:param app: the WSGI application
	"""
	def __init__(self, app):
		self.app = app

	def __call__(self, environ, start_response):
		script_name = environ.get('HTTP_X_SCRIPT_NAME', '')
		if script_name:
			environ['SCRIPT_NAME'] = script_name
			path_info = environ['PATH_INFO']
			if path_info.startswith(script_name):
				environ['PATH_INFO'] = path_info[len(script_name):]

		scheme = environ.get('HTTP_X_SCHEME', '')
		if scheme:
			environ['wsgi.url_scheme'] = scheme
		return self.app(environ, start_response)


app = Flask(__name__)
app.wsgi_app = ReverseProxied(app.wsgi_app)
app.register_blueprint(views)
app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024
app.config['SESSION_TYPE'] = 'filesystem'
Session(app)
socketio.init_app(app)
paranoid = Paranoid(app)
paranoid.redirect_view = 'views.index'


def init():
	"""
	Initializes the application.
	"""
	# init secret key
	if os.path.exists("secret_key"):
		with open("secret_key", "rb") as file:
			secret_key = file.read()
	else:
		secret_key = os.urandom(64)
		with open("secret_key", "wb") as file:
			file.write(secret_key)
	app.secret_key = secret_key


@app.template_filter("strftime")
def unix2string(unix):
	"""
	Converts a unix timestamp into a string.
	"""
	form = "%Y-%m-%d %H:%M:%S"
	t = time.localtime(unix)
	return time.strftime(form, t)


init()
if __name__ == "__main__":
	app.run(host='0.0.0.0', port=5050)