#!/usr/bin/python

import json
import os
import shutil
import SimpleHTTPServer
import socket
import SocketServer
import sys
import urllib2

peers = {}

NETBASE='http://[::1]:8842/'
NAME = 'chat'

def remote(peer, action, data):
    url = NETBASE + '%s/%s/%s' % (peer, NAME, action)
    if data and not isinstance(data, str):
        data = json.dumps(data)
    opener = urllib2.build_opener()
    req = urllib2.Request(url, data=data, headers={
        'Content-Type': 'application/json',
        'User-Agent': 'ChatServer/0.0'
    })
    response = opener.open(req)
    return response.read()


def add_service(name, url):
    add = NETBASE + 'add'
    urllib2.urlopen(add, json.dumps({'name': name, 'url': url}))

class Handler(SimpleHTTPServer.SimpleHTTPRequestHandler):

    def do_GET(self):
        print 'GET', self.path
        path = os.path.join('static', self.path[1:] if self.path != '/' else 'index.html')
        if os.path.exists(path):
            with open(path) as fd:
                shutil.copyfileobj(fd, self.wfile)

    def _remote_request(self, action, data):
        response = {}
        if action == 'message':
            pass
        elif action == 'ping':
            print self.headers
            response['userid'] = self.headers.getheader('From')
            response['remote ping'] = True
            response['data'] = data
        return response

    def _request(self, action, data):
        response = {}
        if action == 'test':
            response['test'] = 'ok'
            response['data'] = data
        elif action in ('ping', 'pong'):
            id = data['id']
            del data['id']
            response = remote(id, action, data)
        return response

    def do_POST(self):
        print 'POST', self.path
        length = int(self.headers.getheader('content-length'))
        body = self.rfile.read(length)
        data = json.loads(body)
        if self.path.startswith('/remote'):
            action = self.path.split('/')[2]
            response = self._remote_request(action, data)
        else:
            action = self.path.split('/')[1]
            response = self._request(action, data)

        response = json.dumps(response, indent=2)
        self.send_response(200)
        self.send_header('Content-Type', 'application/json')
        self.send_header('Content-Length', str(len(response)))
        self.end_headers()
        self.wfile.write(response)

class Server(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
    '''
        IPv4/IPv6 Dual Stack
    '''
    address_family = socket.AF_INET6
    allow_reuse_address = True

    def server_bind(self):
        self.socket.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, False)
        SocketServer.TCPServer.server_bind(self)

if __name__ == '__main__':
    if len(sys.argv) == 2:
        port = int(sys.argv[1])
    else:
        port = 8000
    print "listening on port", port
    url = 'http://127.0.0.1:%s/remote/' % port
    add_service(NAME, url)
    httpd = Server(("", port), Handler)
    httpd.serve_forever()