#!/usr/bin/python3
# -*- coding: utf-8 -*-
#
# script to start/stop/status/send command/read log for khaganat process
#
#    Copyright (C) 2017  AleaJactaEst
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""

Configuration File
------------------

This script need configuration file (see below for model)::

    [config:server]
    # Define port listen (default 8000)
    port = 8000

    # Example to generate all key : see pycertificate
    # key
    keyfile = /home/gameserver/ca/appli/private/serverkey.pem

    # certificate
    certfile = /home/gameserver/ca/appli/certs/servercert.pem

    # certification to check signature
    ca_cert = /home/gameserver/ca/appli/certs/cachaincert.pem

    # address listen (default all port)
    address =


    # Admin Executor Service
    [command:aes]
    # command to launch the program
    command = ryzom_admin_service -A/home/gameserver/khanat/server -C/home/gameserver/khanat/server -L/home/gameserver/log/khanat --nobreak --fulladminname=admin_executor_service --shortadminname=AES
    # Path : where this program is launched
    path = /home/gameserver/khanat/server/
    # size buffer log for each program launched (number line stdout)
    logsize = 1000
    # buffer size (define value bufsize on subprocess.Popen, this buffer is use before read by manager)
    bufsize = 100


    # bms_master : backup_service
    [command:bms_master]
    # command to launch the program
    command = ryzom_backup_service -A/home/gameserver/khanat/server -C/home/gameserver/khanat/server -L/home/gameserver/khanat/server/log --nobreak --writepid -P49990
    # Path : where this program is launched
    path = /home/gameserver/khanat/server/
    # we keep [logsize] last number line stdout
    logsize = 1000
    # buffer size (define value bufsize on subprocess.Popen)
    bufsize = 100


Manager
-------

    Manage all process khaganat
    Launch this prorgam in background and use clientManager to manipulate process

Design

.. graphviz::

   digraph Manager {
      "Manager" -> "ManageCommand (command 1)";
      "ManageCommand (command 1)" -> "read_output (thread1)";
      "Manager" -> "ManageCommand (command 2)";
      "ManageCommand (command 2)" -> "read_output (thread2)";
      "Manager" -> "ServerHttp";
      "ServerHttp" -> "khaganatHTTPServer";
      "khaganatHTTPServer" -> "ManageHttpRequest";
      "ManageHttpRequest" -> "ManageCommand (command 1)" [style=dashed];
      "ManageHttpRequest" -> "ManageCommand (command 2)" [style=dashed];
   }


http(s) command :
-----------------

+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **Html command** | **Path**    | **Argument**  {json format}                 |     **Comment**                             |
+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **POST**         |  /SHUTDOWN  |                                             | Stop all process and stop pymanager         |
+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **POST**         |  /STARTALL  |                                             | Start all processes                         |
+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **GET**          |  /STATUSALL |                                             | Get status all processes                    |
+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **POST**         |  /STOPALL   |                                             | Stop all processes                          |
+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **POST**         |  /START     | {'name': program}                           | Start for one program                       |
+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **POST**         |  /STDIN     | {'name': program, 'action': action}         | Send action for one program (send to input) |
+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **GET**          |  /STATUS    | {'name': program}                           | Get status for one program                  |
+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **POST**         |  /STOP      | {'name': program}                           | Stop for one program                        |
+------------------+-------------+---------------------------------------------+---------------------------------------------+
| **GET**          |  /STDOUT    | {'name': program, 'first-line': firstline } | Get log for one program                     |
+------------------+-------------+---------------------------------------------+---------------------------------------------+


Example ::

    nohup pymanager --log info  --filelog /home/gameserver/log/manager.log -c /home/gameserver/cfg/khaganat.cfg 2>/dev/null 1>/dev/null 0</dev/zero &

"""

import sys
import subprocess
import queue
import threading
import signal
import argparse
import configparser
import logging
import logging.config
import multiprocessing
import time
import ssl
import http.server
import json
import fcntl
import os
import base64
import bcrypt

__VERSION__ = '1.0'


class ManageHttpRequest(http.server.SimpleHTTPRequestHandler):
    """
        Class ManageHttpRequest receive all request https
            * analyze and send to ManageCommand (with queueIn & queueOut)

    Methods inherited from SimpleHTTPRequestHandler:
    """
    def __init__(self, request, client_address, server):
        """ Initialize object """
        http.server.SimpleHTTPRequestHandler.__init__(self, request, client_address, server)

    def log_message(self, format, *args):
        """ function use to send message in log

        :param str format: format message
        :param list args: argument
        """
        logging.info("%s (%s) %s" %
                     (self.address_string(),
                      self.log_date_time_string(),
                      format % args))

    def _set_headers(self):
        """ Prepare header """
        self.send_response(200)
        self.send_header('Content-type', 'application/json')
        self.end_headers()

    def _command_log(self):
        """ sub request log (send log on specific process) """
        if 'content-type' in self.headers:
            ctype = self.headers['content-type']
        else:
            ctype = 'text'
        if ctype != 'application/json':
            logging.error("Received request with bad content-type")
            self.send_response(400, "bad content-type")
            self.end_headers()
            return
        try:
            sizemsg = int(self.headers['content-length'])
        except (TypeError, KeyError, ValueError):
            logging.error("Received request with bad content-length")
            self.send_response(400, "bad content-length")
            self.end_headers()
            return

        msg = self.rfile.read(sizemsg)
        msgjson = json.loads(msg.decode())

        logging.debug(msgjson)
        if 'name' not in msgjson:
            self.send_error(400, 'Missing param name')
            logging.error("Missing param name")
            return
        name = msgjson['name']
        if name not in self.server.listQueueIn:
            self.send_error(400, 'Name unknown')
            logging.error("Name unknwon '%s'" % name)
            return

        if 'first-line' not in msgjson:
            self.send_error(400, 'Missing param first-line')
            logging.error("Missing param first-line '%s'" % name)
            return

        firstLine = 0
        try:
            firstLine = int(msgjson['first-line'])
        except ValueError:
            self.send_error(400, 'Impossible to read first-line')
            logging.error("Impossible to read first-line '%s'" % msgjson['first-line'])
            return
        logging.debug("%s:%s" % (name, firstLine))
        self.server.listEvent[name].set()
        self.server.listQueueIn[name].put("STDOUT %d" % firstLine)
        logging.debug("Send request to '%s'" % (name))
        try:
            item = self.server.listQueueOut[name].get(timeout=4)
        except queue.Empty:
            logging.debug("Received nothing from '%s'" % name)
            return
        self._set_headers()
        self.wfile.write(bytes(item, "utf-8"))
        logging.debug("item : %s" % item)

    def _send_list(self):
        """ sub-request to list all program available """
        outjson = {}
        pos = 0
        for program in self.server.listQueueIn:
            outjson.setdefault(pos, program)
            pos += 1
        self._set_headers()
        self.wfile.write(bytes(json.dumps(outjson), "utf-8"))

    def _send_shutdown(self):
        """ Stop all program and stop manager """
        for name in self.server.listQueueIn:
            self.server.listEvent[name].set()
            self.server.listQueueIn[name].put("SHUTDOWN")
        self._set_headers()
        outjson = {'shutdown': 'ok'}
        self.wfile.write(bytes(json.dumps(outjson), "utf-8"))

    def _send_command_all(self, command):
        """ Send specific command on all program

        :param str action: command (START, STOP, STATUS, ... )
        """
        outjson = {}
        for name in self.server.listQueueIn:
            self.server.listEvent[name].set()
            self.server.listQueueIn[name].put(command)
            try:
                item = self.server.listQueueOut[name].get(timeout=4)
            except queue.Empty:
                logging.debug("pas de message recu pour %s" % name)
                return
            outjson.setdefault(name, item)
        self._set_headers()
        self.wfile.write(bytes(json.dumps(outjson), "utf-8"))

    def _send_action(self):
        """ send specific action on one program """
        if 'content-type' in self.headers:
            ctype = self.headers['content-type']
        else:
            ctype = 'text'
        if ctype != 'application/json':
            logging.error("Bad content-type")
            self.send_response(400, "bad content-type")
            self.end_headers()
            return
        try:
            sizemsg = int(self.headers['content-length'])
        except (TypeError, KeyError, ValueError):
            logging.error("Bad content-length")
            self.send_response(400, "bad content-length")
            self.end_headers()
            return

        msg = self.rfile.read(sizemsg)
        msgjson = json.loads(msg.decode())

        logging.debug(msgjson)
        if 'name' not in msgjson:
            self.send_error(400, 'Missing param name')
            logging.error("Missing param name")
            return
        name = msgjson['name']
        if name not in self.server.listQueueIn:
            self.send_error(400, 'Name unknown')
            logging.error("Name unknwon '%s'" % name)
            return

        if 'action' not in msgjson:
            self.send_error(400, 'Missing param action')
            logging.error("Missing param action '%s'" % name)
            return

        action = ''
        try:
            action = msgjson['action']
        except KeyError:
            logging.error("Impossible to read first-line '%s'" % msgjson['action'])
            self.send_error(400, 'Impossible to read action')
            return
        logging.debug("%s:%s" % (name, action))
        self.server.listEvent[name].set()
        self.server.listQueueIn[name].put("ACTION %s" % action)
        logging.debug("message envoye: %s" % (name))

        try:
            result = self.server.listQueueOut[name].get(timeout=4)
        except queue.Empty:
            logging.debug("pas de message recu pour %s" % name)
            return
        outjson = {'state': result}
        self._set_headers()
        self.wfile.write(bytes(json.dumps(outjson), "utf-8"))

    def _send_command(self, command):
        """ Send specific command on one program

        :param str command: command (START, STOP, STATUS, ... )
        """
        if 'content-type' in self.headers:
            ctype = self.headers['content-type']
        else:
            ctype = 'text'
        if ctype != 'application/json':
            logging.error("Bad content-type")
            self.send_response(400, "Bad content-type")
            self.end_headers()
            return
        try:
            sizemsg = int(self.headers['content-length'])
        except (TypeError,  KeyError,  ValueError):
            logging.error("Bad content-length")
            self.send_response(400, "Bad content-length")
            self.end_headers()
            return
        msg = self.rfile.read(sizemsg)
        msgjson = json.loads(msg.decode())
        if 'name' not in msgjson:
            self.send_error(400, 'Missing param name')
            logging.error("Missing param name")
            return
        name = msgjson['name']
        if name not in self.server.listQueueIn:
            self.send_error(400, 'Name unknown')
            logging.error("Name unknwon '%s'" % name)
            return
        logging.debug("[%s %s] Send command" % (command, name))
        self.server.listEvent[name].set()
        self.server.listQueueIn[name].put(command)
        try:
            result = self.server.listQueueOut[name].get(timeout=4)
        except queue.Empty:
            self.send_error(500, 'Missing return')
            logging.debug("[%s %s] Missing return" % (command, name))
            return
        logging.debug("[%s %s] => %s" % (command, name, result))

        outjson = {'state': result}
        self._set_headers()
        self.wfile.write(bytes(json.dumps(outjson), "utf-8"))

    def check_authentication(self):
        if not self.server.authentification:
            return True
        try:
            auth_header = self.headers['Authorization'].split()
            if auth_header[0] != 'Basic':
                logging.error("Authentification with Bad method (%s)" % auth_header[0])
                return False
            decode = base64.b64decode(auth_header[1]).decode('UTF-8')
            account,  password = decode.split(':', maxsplit=1)
            if account not in self.server.users:
                logging.error("Authentification with unknown user (%s)" % account)
                return False
            hashed_password = self.server.users[account]
            if bcrypt.checkpw(password, hashed_password):
                return True
            else:
                logging.error("Authentification with wrong password for user (%s)" % account)
                return False
        except (ValueError, IndexError, AttributeError) as e:
            logging.error("Error detected %s" % e)
            return False
        return True

    def do_GET(self):
        """
            Manage request READ
            we can execute LOG, STATUS, LIST & STATUSALL
        """
        logging.debug('get recieved : %s' % self.path)
        if not self.check_authentication():
            self.send_error(403, 'Wrong authentication')
            logging.error("Wrong authentication")
        elif self.path == '/STDOUT':
            self._command_log()
        elif self.path == '/STATUS':
            self._send_command("STATUS")
        elif self.path == '/LIST':
            self._send_list()
        elif self.path == '/STATUSALL':
            self._send_command_all("STATUS")
        else:
            self.send_error(400, 'Path unknown')
            logging.error("Path unknwon '%s'" % self.path)

    def do_POST(self):
        """ Manage request POST (CREATE)
            currently, we execute START, STOP, ACTION, SHUTDOWN, STARTALL & STOPALL
        """
        logging.debug('post recieved : %s' % self.path)
        if not self.check_authentication():
            self.send_error(400, 'Bad authentication')
            logging.error("Bad authentication")
        elif self.path == '/START':
            self._send_command("START")
        elif self.path == '/STOP':
            self._send_command("STOP")
        elif self.path == '/STDIN':
            self._send_action()
        elif self.path == '/SHUTDOWN':
            self._send_shutdown()
        elif self.path == '/STARTALL':
            self._send_command_all("START")
        elif self.path == '/STOPALL':
            self._send_command_all("STOP")
        else:
            self.send_error(400, 'Path unknown')
            logging.error("Path unknwon '%s'" % self.path)

    def do_HEAD(self):
        """ request HEAD received """
        logging.debug('head recieved : %s' % self.path)
        self.send_error(404, 'File Not Found: %s' % self.path)

    def do_PUT(self):
        """ request PUT (UPDATE/REPLACE) received """
        logging.debug('put recieved!')
        self.send_error(404, 'File Not Found: %s' % self.path)

    def do_PATCH(self):
        """ request PATCH (UPDATE/MODIFY) received """
        logging.debug('patch recieved!')
        self.send_error(404, 'File Not Found: %s' % self.path)

    def do_DELETE(self):
        """ request DELETE received """
        logging.debug('delete recieved!')
        self.send_error(404, 'File Not Found: %s' % self.path)


class khaganatHTTPServer(http.server.HTTPServer):
    """
        Class khaganatHTTPServer
        Redefine HTTPServer (adding queue input & queue output, use by ManageHttpRequest)
    """
    def __init__(self,
                 listQueueIn,
                 listQueueOut,
                 listEvent,
                 server_address,
                 RequestHandlerClass,
                 authentification,
                 users,
                 bind_and_activate=True):
        http.server.HTTPServer.__init__(self, server_address, RequestHandlerClass, bind_and_activate)
        self.listQueueIn = listQueueIn
        self.listQueueOut = listQueueOut
        self.listEvent = listEvent
        self.authentification = authentification
        self.users = users


class ServerHttp(multiprocessing.Process):
    """
        Initialize server HTTPS
         * define Dictionnary queueIn & queueOut (with key as section's name in configuration)
    """
    def __init__(self, keyfile, certfile, ca_cert, address='',
                 port=8000, authentification=True, users={}):
        multiprocessing.Process.__init__(self)
        self.listQueueIn = {}
        self.listQueueOut = {}
        self.listEvent = {}
        self.port = port
        self.key_file = keyfile
        self.cert_file = certfile
        self.ca_cert = ca_cert
        self.address = address
        self.authentification = authentification
        self.users = users

    def run(self):
        server_address = (self.address, self.port)
        httpd = khaganatHTTPServer(self.listQueueIn,
                                   self.listQueueOut,
                                   self.listEvent,
                                   server_address,
                                   ManageHttpRequest,
                                   self.authentification,
                                   self.users)
        if self.ca_cert:
            httpd.socket = ssl.wrap_socket(httpd.socket,
                                           keyfile=self.key_file,
                                           certfile=self.cert_file,
                                           ca_certs=self.ca_cert,
                                           cert_reqs=ssl.CERT_REQUIRED,
                                           ssl_version=ssl.PROTOCOL_TLSv1_2,
                                           server_side=True)
        else:
            httpd.socket = ssl.wrap_socket(httpd.socket,
                                           keyfile=self.key_file,
                                           certfile=self.cert_file,
                                           server_side=True)
        logging.info('https listen')
        httpd.serve_forever()

    def append(self, name, queueIn, queueOut, event):
        self.listQueueIn.setdefault(name, queueIn)
        self.listQueueOut.setdefault(name, queueOut)
        self.listEvent.setdefault(name, event)


class ManageCommand():
    """
        Manage Command (only one)
        * start/stop/status/get log/send an action [stdin] for command (receive order with queueIn)
        * read output [in other thread]
        * communicate with ManageHttpRequest (with queueOut)
    """
    def __init__(self, name, command, path, logsize, bufsize, queueIn, queueOut, event, maxWaitEnd=10,  waitDelay=1):
        self.process = None
        self.queueIn = queueIn
        self.queueOut = queueOut
        self.name = name
        self.command = command
        self.path = path
        self.log = []
        self.poslastlog = 0
        self.maxlog = logsize
        self.event = event
        self.bufsize = bufsize
        self.threadRead = None
        self.running = False
        self.state = multiprocessing.Queue()
        self.pipeIn, self.pipeOut = multiprocessing.Pipe()
        self.eventRunning = threading.Event()
        self.maxWaitEnd = maxWaitEnd
        self.waitDelay = waitDelay

    def read_output(self):
        """ Thread to read output (stdout) """
        fl = fcntl.fcntl(self.process.stdout, fcntl.F_GETFL)
        fcntl.fcntl(self.process.stdout, fcntl.F_SETFL, fl | os.O_NONBLOCK)
        logging.debug("Start reader %s" % self.name)
        while self.eventRunning.is_set():
            code = self.process.poll()
            if code is not None:
                logging.error("process %s down" % self.name)
                self.eventRunning.clear()
                continue
            try:
                line = self.process.stdout.readline()
            except AttributeError:
                logging.error("process %s down (not detected)" % self.name)
                self.eventRunning.clear()
                continue
            if not line:
                time.sleep(self.waitDelay)
                continue
            now = time.strftime('%Y/%m/%d %H:%M:%S %Z')
            logging.debug("line %s " % line)
            self.poslastlog += 1
            while len(self.log) >= self.maxlog:
                self.log.pop(0)
            msg = line.decode().strip()
            self.log.append(now + ' ' + msg)
            logging.debug("recu: '%s'" % (msg))
        logging.debug("End reader: '%s'" % self.name)

    def handler(self, signum, frame):
        """ Managed signal (not used) """
        if self.process:
            # logging.debug("Send signal %d to '%s'" %(signum, self.name))
            self.process.send_signal(signum)
        else:
            logging.error("Impossible to send signal %d to '%s'" % (signum, self.name))
            raise IOError("signal received")

    def start(self):
        """ Start program """
        logging.debug("start %s" % (self.name))
        if self.process:
            logging.debug("%s already exist" % self.name)
            code = self.process.poll()
            if code is None:
                logging.debug("%s already exist" % self.name)
                return "already-started"
            else:
                logging.debug("%s crashed" % self.name)
                code = self.process.wait()
                logging.error("%s crashed (return code:%d) - restart program" % (self.name, code))
        try:
            self.process = subprocess.Popen(self.command.split(),
                                            cwd=self.path,
                                            shell=False,
                                            bufsize=self.bufsize,
                                            stdin=subprocess.PIPE,
                                            stdout=subprocess.PIPE,
                                            stderr=subprocess.STDOUT,
                                            close_fds=True)
        except FileNotFoundError as e:
            logging.error("Impossible to start %s (%s)" % (self.name,  e))
            return "crashed"
        except PermissionError as e:
            logging.error("Impossible to start %s (%s)" % (self.name,  e))
            return "crashed"
        self.eventRunning.set()
        if self.threadRead:
            self.eventRunning.clear()
            self.threadRead.join()
            self.threadRead = None
        self.running = True
        self.threadRead = threading.Thread(target=self.read_output)
        self.threadRead.start()
        return "started"

    def status(self):
        """ Get status of program """
        logging.debug("status %s" % (self.name))
        if self.process:
            logging.debug("status %s - check" % (self.name))
            code = self.process.poll()
            if code is None:
                logging.debug("%s status" % (self.name))
                return "started"
            else:
                logging.error("%s crashed (return code:%d)" % (self.name, code))
                self.process = None
                return "stopped"
        else:
            logging.debug("%s status" % (self.name))
            return "stopped"

    def list_thread(self):
        """ List number thrad (not used) """
        logging.debug('list thread')
        # main_thread = threading.currentThread()
        for t in threading.enumerate():
            logging.debug('thread %s', t.getName())
            logging.debug("id %d" % t.ident)

    def stop(self):
        """ Stop program """
        logging.debug("stop %s" % (self.name))
        if not self.process:
            return "stopped"
        else:
            code = self.process.poll()
            loop = self.maxWaitEnd
            while (code is None) and (loop > 0):
                logging.debug("stop process %s", self.name)
                self.process.send_signal(15)
                time.sleep(1)
                code = self.process.poll()
                loop -= 1

            loop = self.maxWaitEnd
            while (code is None) and (loop > 0):
                logging.debug("terminate process %s", self.name)
                self.process.terminate()
                time.sleep(1)
                code = self.process.poll()
                loop -= 1

            loop = self.maxWaitEnd
            while (code is None) and (loop > 0):
                logging.debug("kill process %s", self.name)
                self.process.send_signal(9)
                time.sleep(1)
                code = self.process.poll()
                loop -= 1

            code = self.process.wait()
            self.process = None
            if self.threadRead:
                self.eventRunning.clear()
                self.threadRead.join()
                self.threadRead = None
            logging.info("%s stopped (return code:%d)" % (self.name, code))
            return "stopped"

    def getlog(self, firstline):
        """ Get log """
        logging.debug("read log %d " % firstline)
        outjson = {}
        pos = self.poslastlog - len(self.log) + 1
        firstlinefound = None
        for line in self.log:
            if pos >= firstline:
                outjson.setdefault(pos, line)
                if not firstlinefound:
                    firstlinefound = pos
            pos += 1
        outjson.setdefault('first-line', firstlinefound)
        outjson.setdefault('last-line', pos - 1)
        return json.dumps(outjson)

    def action(self, action):
        """ Send action to program (send input to stdin) """
        logging.debug("STDIN '%s'" % action)
        if self.process:
            code = self.process.poll()
            if code is None:
                if action:
                    self.process.stdin.write(bytes(action+'\n', 'UTF-8'))
                    self.process.stdin.flush()
                    return "ok"
        return "ko"

    def run(self):
        """ loop, run child (wait command) """
        loop = True
        while loop:
            logging.debug('wait %s' % self.name)
            self.event.wait()
            logging.debug('received event %s' % self.name)
            try:
                msg = self.queueIn.get(timeout=4)
            except queue.Empty:
                self.event.clear()
                logging.debug("pas de message recu pour %s" % self.name)
                return
            logging.debug("command : '%s'" % msg)
            command = msg.split()[0]
            if command == "SHUTDOWN":
                loop = False
                continue
            elif command == "START":
                self.queueOut.put(self.start())
            elif command == "STATUS":
                self.queueOut.put(self.status())
            elif command == "STOP":
                self.queueOut.put(self.stop())
            elif command == "STDIN":
                data = msg.split(maxsplit=1)[1]
                self.queueOut.put(self.action(data))
            elif command == "STDOUT":
                try:
                    firstline = int(msg.split(maxsplit=1)[1])
                except ValueError:
                    firstline = 0
                self.queueOut.put(self.getlog(firstline))
            else:
                self.queueOut.put("error : command unknown")
            self.event.clear()
        self.stop()
        self.event.clear()
        logging.debug('end')


class Manager():
    """
    Manage all services
        (read configuration, launch ManageCommand & launch ServerHttp & wait the end)
      * https service
      * all child to manage (it start ManageCommand by command define in configuration)

    """
    def __init__(self, launch_program):
        self.threadCommand = []
        self.command = []
        self.launch_program = launch_program
        self.param = {}
        self.users = {}
        self.passwordfile = None
        self.serverHttp = None

    def load_config(self, filecfg):
        if filecfg is None:
            raise ValueError
        config = configparser.ConfigParser()
        config.read_file(filecfg)
        self._load_config(config)

    def load_password(self):
        if self.passwordfile:
            with open(self.passwordfile, 'rt') as fp:
                for line in fp:
                    line = line.strip()
                    if not line:
                        continue
                    username, password = line.split(':', maxsplit=1)
                    self.users.setdefault(username,  password)

    def _load_config(self, config):
        """
            Read configuration object
            param: config: configuration object
        """
        logging.debug("Sections :%s" % config.sections())
        for name in config.sections():
            if name == 'config:client':
                continue
            if name == 'config:user':
                continue
            elif name == 'config:server':
                logging.debug("read config '%s'" % name)
                try:
                    self.port = int(config[name]['port'])
                except (TypeError, KeyError, ValueError):
                    self.port = 8000
                try:
                    self.address = config[name]['address']
                except (TypeError, KeyError):
                    self.address = ''
                try:
                    self.keyfile = config[name]['keyfile']
                except (TypeError, KeyError):
                    self.keyfile = 'crt/key.pem'
                try:
                    self.certfile = config[name]['certfile']
                except (TypeError, KeyError):
                    self.certfile = 'crt/cert.pem'
                try:
                    self.ca_cert = config[name]['ca_cert']
                except (TypeError, KeyError):
                    self.ca_cert = 'crt/ca_cert.crt'
                try:
                    tmp = config[name]['authentification']
                    if tmp.upper().strip() == 'YES':
                        self.authentification = True
                    else:
                        self.authentification = False
                except (TypeError, KeyError):
                    self.authentification = False
                try:
                    self.passwordfile = config[name]['passwordfile']
                except (TypeError, KeyError):
                    self.passwordfile = None
            else:
                head, value = name.split(':', maxsplit=1)
                if head == 'command' and 'command' in config[name]:
                    logging.debug("read command '%s'" % name)
                    if 'path' in config[name]:
                        path = config[name]['path']
                    else:
                        path = None
                    if 'logsize' in config[name]:
                        try:
                            logsize = int(config[name]['logsize'])
                        except (TypeError, KeyError, ValueError):
                            logging.error("Impossible to read param logsize (command:%s)",  name)
                            raise ValueError
                    else:
                        logsize = 100
                    if 'bufsize' in config[name]:
                        try:
                            bufsize = int(config[name]['bufsize'])
                        except (TypeError, KeyError, ValueError):
                            logging.error("Impossible to read param bufsize (command:%s)",  name)
                            raise ValueError
                    else:
                        bufsize = 100
                    self.param.setdefault(name, {'command': config[name]['command'],
                                                 'path': path,
                                                 'logsize': logsize,
                                                 'bufsize': bufsize})

    def initialize_http(self):
        """
            Initialize object serverHttp
        """
        self.serverHttp = ServerHttp(self.keyfile,
                                     self.certfile,
                                     self.ca_cert,
                                     self.address,
                                     self.port,
                                     authentification=self.authentification,
                                     users=self.users)

    def runCommand(self, name, command, path, logsize, bufsize, queueIn, queueOut, event):
        """
            Thread to manage khaganat program
        """
        logging.debug("Initialize '%s'" % name)
        manageCommand = ManageCommand(name=name,
                                      command=command,
                                      path=path,
                                      logsize=logsize,
                                      bufsize=bufsize,
                                      queueIn=queueIn,
                                      queueOut=queueOut,
                                      event=event)
        manageCommand.run()

    def launch_server_http(self):
        """ Launch server https """
        self.serverHttp.daemon = True
        self.serverHttp.start()

    def launch_command(self):
        """ Launch child to manage each program """
        for name in self.param:
            logging.debug("Initialize '%s'" % name)
            queueIn = multiprocessing.Queue()
            queueOut = multiprocessing.Queue()
            event = multiprocessing.Event()
            self.serverHttp.append(name, queueIn, queueOut, event)
            threadCommand = multiprocessing.Process(target=self.runCommand,
                                                    args=(name,
                                                          self.param[name]['command'],
                                                          self.param[name]['path'],
                                                          self.param[name]['logsize'],
                                                          self.param[name]['bufsize'],
                                                          queueIn,
                                                          queueOut,
                                                          event))
            threadCommand.start()
            if self.launch_program:
                event.set()
                queueIn.put("START")
                try:
                    item = queueOut.get(timeout=4)
                except queue.Empty:
                    item = ""
                    logging.debug("pas de message recu pour %s" % name)
                    return
                logging.info("%s => %s" % (name,  item))
            self.threadCommand.append(threadCommand)

    def receive_signal(self, signum, frame):
        """ Managed signal """
        for child in self.threadCommand:
            child.terminate()
        if self.serverHttp:
            self.serverHttp.terminate()

    def wait_children_commands(self):
        for child in self.threadCommand:
            child.join()

    def wait_child_server_http(self):
        self.serverHttp.terminate()
        self.serverHttp.join()

    def run(self):
        """ launch all """
        self.launch_command()
        self.launch_server_http()
        logging.info('started')
        self.wait_children_commands()
        logging.info('execute shutdown')
        signal.alarm(0)
        logging.info('wait thread http')
        time.sleep(1)
        self.wait_child_server_http()
        logging.info('shutdown completed')


def root(filecfg, fileLog, logLevel, launch_program, show_log_console):
    """
        Main function
        :param str filecfg: configuration file
        :param str fileLog: log file
        :param bool launch_program: do you launch program when you start manager (auto start)
        :param bool show_log_console: do you need show log on console
    """
    # Manage log
    logging.getLogger('logging')
    numeric_level = getattr(logging, logLevel.upper(), None)
    if not isinstance(numeric_level, int):
        raise ValueError('Invalid log level: %s' % logLevel)
    handlers = []
    if show_log_console:
        handlers.append(logging.StreamHandler())
    if fileLog:
        handlers.append(logging.FileHandler(fileLog.name))
    logging.basicConfig(handlers=handlers, level=numeric_level,
                        format='%(asctime)s %(levelname)s [pid:%(process)d] [%(funcName)s:%(lineno)d] %(message)s')
    if filecfg is None:
        logging.error("Missing configuration file")
        raise ValueError
    manager = Manager(launch_program)
    manager.load_config(filecfg)
    manager.load_password()
    manager.initialize_http()
    manager.run()


def main(args=sys.argv[1:]):
    """ Main function

        :param list args: all arguments ('--help, '--version', ...)
    """
    parser = argparse.ArgumentParser(description='Manage khaganat process')
    parser.add_argument('--version', action='version', version='%(prog)s ' + __VERSION__)
    parser.add_argument('-c', '--conf', type=argparse.FileType('r'),
                        default='khaganat.cfg', help='configuration file')
    parser.add_argument('--show-log-console', action='store_true',
                        help='show message in console', default=False)
    parser.add_argument('--filelog', type=argparse.FileType('wt'),
                        default=None, help='log file')
    parser.add_argument('--log',
                        default='INFO', help='log level [DEBUG, INFO, WARNING, ERROR')
    parser.add_argument('--launch-program', action='store_true',
                        help='launch program when start manager', default=False)
    param = parser.parse_args(args)
    root(filecfg=param.conf,
         fileLog=param.filelog,
         logLevel=param.log,
         launch_program=param.launch_program,
         show_log_console=param.show_log_console)

if __name__ == '__main__':
    main()