#!/usr/bin/env python3

import os
import urllib.parse

import cleancss
import tornado.gen
import tornado.escape
import tornado.httpclient
import tornado.ioloop
import tornado.web

import config
import db

class BaseHandler(tornado.web.RequestHandler):
	def render(self, *args, **kwargs):
		kwargs['api_host'] = config.api_host
		kwargs['web_host'] = config.web_host
		return super(BaseHandler, self).render(*args, **kwargs)

	def render_string(self, *args, **kwargs):
		s = super(BaseHandler, self).render_string(*args, **kwargs)
		return s.replace(b'\n', b'') # this is like Django's {% spaceless %}

	def get_current_user(self):
		user_id = self.get_secure_cookie('user_id')
		if user_id:
			return {
				'id': int(user_id),
				'username': self.get_secure_cookie('username'),
			}

	def create_session(self, user_id, username):
		self.set_secure_cookie('user_id', str(user_id))
		self.set_secure_cookie('username', username)

	@property
	def db(self):
		return self.application.db

class MainHandler(BaseHandler):
	@tornado.gen.coroutine
	def get(self):
		self.render('home.html')

class RegisterHandler(BaseHandler):
	@tornado.gen.coroutine
	def get(self):
		self.render('register.html')

	@tornado.gen.coroutine
	def post(self):
		username = self.get_argument('username', '')
		password = self.get_argument('password', '')
		user_id = yield self.db.create_user(username, password)
		self.create_session(user_id, username)
		self.redirect('/')

class LoginHandler(BaseHandler):
	@tornado.gen.coroutine
	def get(self):
		self.render('login.html')

	@tornado.gen.coroutine
	def post(self):
		username = self.get_argument('username', '')
		password = self.get_argument('password', '')
		user = yield self.db.check_user(username, password)
		if user:
			self.create_session(user['id'], user['username'])
			self.redirect('/')
		else:
			self.render('login.html')

class LogoutHandler(BaseHandler):
	def get(self):
		self.clear_all_cookies()
		self.redirect('/')

class ServersHandler(BaseHandler):
	@tornado.web.authenticated
	@tornado.gen.coroutine
	def get(self):
		groups = servers = None
		user_id = self.current_user['id']
		groups = yield self.db.get_groups(user_id)
		servers = yield self.db.get_servers(user_id)
		self.render('servers.html', groups=groups, servers=servers)

class StatsHandler(BaseHandler):
	@tornado.web.authenticated
	@tornado.gen.coroutine
	def get(self, group_id, server_id):
		group_id = int(group_id)
		api_key = yield self.db.get_api_key(group_id)
		servers = yield self.db.get_servers(self.current_user['id'])
		self.render('stats.html', group_id=group_id, api_key=api_key, servers=servers[group_id])

class GroupsHandler(BaseHandler):
	@tornado.web.authenticated
	@tornado.gen.coroutine
	def get(self):
		user_id = self.current_user['id']
		groups = yield self.db.get_groups(user_id)
		self.render('groups.html', groups=groups)

class GroupCreateHandler(BaseHandler):
	@tornado.web.authenticated
	@tornado.gen.coroutine
	def post(self):
		yield self.db.create_group(self.current_user['id'], self.get_body_argument('name'))
		self.redirect('/')

class GroupInviteHandler(BaseHandler):
	@tornado.web.authenticated
	@tornado.gen.coroutine
	def post(self):
		group_id = int(self.get_body_argument('group'))
		yield self.db.invite_user_group(self.get_body_argument('username'), group_id)
		self.redirect('/')

class CSSHandler(tornado.web.RequestHandler):
	def get(self, css_path):
		css_path = os.path.join(os.path.dirname(__file__), 'static', css_path) + '.ccss'
		with open(css_path, 'r') as f:
			self.set_header('Content-Type', 'text/css')
			self.write(cleancss.convert(f))

if __name__ == '__main__':
	app = tornado.web.Application(
		handlers=[
			(r'/', MainHandler),
			(r'/register', RegisterHandler),
			(r'/login', LoginHandler),
			(r'/logout', LogoutHandler),
			(r'/servers', ServersHandler),
			(r'/stats/(\d+)/(\d+)', StatsHandler),
			(r'/groups', GroupsHandler),
			(r'/groups/create', GroupCreateHandler),
			(r'/groups/invite', GroupInviteHandler),
			(r'/(css/.+)\.css', CSSHandler),
		],
		template_path=os.path.join(os.path.dirname(__file__), 'templates'),
		static_path=os.path.join(os.path.dirname(__file__), 'static'),
		login_url='/login',
		cookie_secret=config.cookie_secret,
		debug=config.debug,
	)
	app.listen(config.web_port)
	app.db = db.MomokoDB()
	print('listening on :%d' % config.web_port)
	tornado.ioloop.IOLoop.instance().start()