#!/usr/bin/env python3

import logging
from http.server import BaseHTTPRequestHandler, HTTPServer
import configparser
import slixmpp

config = configparser.ConfigParser()
config.read("config.ini") # <--- Read configfile in dictionary

def getRcpt(token): # <--- lookup recipient for token in config
    if token in config['RECIPIENT']:
        rcpt = config['RECIPIENT'][token]
        return rcpt
    else:
        return "" # <--- empty string / FALSE when no token was found



class S(BaseHTTPRequestHandler):

    def _set_response(code):
        self.send_header('Content-type', 'text/plain')
        self.send_response(code)
        self.end_headers()

    def do_POST(self):
        token = self.headers['Authorization'][-64:]
        if token.isalnum(): 
            logging.info('Valid token received.')
            content_length = int(self.headers['Content-Length']) # <--- Gets the size of data
            post_data = self.rfile.read(content_length) # <--- Gets the data itself
            msg = post_data.decode('utf-8')
            rcpt = getRcpt(token) # <--- lookup recipient for token in config 
            if rcpt:
                sendMsg(rcpt, msg)
                self._set_response(202) # <--- HTTP Accepted, message sent + posibly received
            else:
                self._set_response(401) # <--- HTTP Unauthorized, no token found
        else:
            self._set_response(400) # <--- HTTP Bad Request, token contains special characters 



class SendMsgBot(slixmpp.ClientXMPP):
    def __init__(self, jid, password, recipient, message):
        slixmpp.ClientXMPP.__init__(self, jid, password)
        self.recipient = recipient
        self.msg = message
        # Event session_start event is triggered when connection is ready
        self.add_event_handler("session_start", self.start)

    async def start(self, event):
        self.send_message(mto=self.recipient, mbody=self.msg, mtype='chat')
        self.disconnect()


def sendMsg(rcpt, msg):
    jid = config['ACCOUNT']['jid']
    password = config['ACCOUNT']['password']
    logging.info('Sending message.')
    xmpp = SendMsgBot(jid, password, rcpt, msg)
    xmpp.connect()
    xmpp.process(forever=False)
    del xmpp
 

def run(server_class=HTTPServer, handler_class=S, port=8080):
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    logging.info('Starting server...')
    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        pass
    httpd.server_close()

run()