# -*- coding: utf-8 -*-

import socket
import threading
import time

try:
    import ssl
except ImportError:
    pass

from module.plugins.internal.Addon import Addon
from module.plugins.internal.misc import forward, lock, threaded


#@TODO: IPv6 support
class ClickNLoad(Addon):
    __name__    = "ClickNLoad"
    __type__    = "hook"
    __version__ = "0.59"
    __status__  = "testing"

    __config__ = [("activated", "bool"           , "Activated"                      , True       ),
                  ("port"     , "int"            , "Port"                           , 9666       ),
                  ("extern"   , "bool"           , "Listen for external connections", True       ),
                  ("dest"     , "queue;collector", "Add packages to"                , "collector")]

    __description__ = """Click'n'Load support"""
    __license__     = "GPLv3"
    __authors__     = [("RaNaN"         , "RaNaN@pyload.de"           ),
                       ("Walter Purcaro", "vuolter@gmail.com"         ),
                       ("GammaC0de"     , "nitzo2001[AT]yahoo[DOT]com")]


    def init(self):
        self.cnl_ip    = "" if self.config.get('extern') else "127.0.0.1"
        self.cnl_port  = self.config.get('port')
        self.web_ip    = "127.0.0.1" if any(_ip == self.pyload.config.get('webinterface', 'host') for _ip in ("0.0.0.0", "")) \
            else self.pyload.config.get('webinterface', 'host')
        self.web_port  = self.pyload.config.get('webinterface', 'port')

        self.server_running = False
        self.do_exit        = False
        self.exit_done      = threading.Event()


    def activate(self):
        if not self.pyload.config.get('webinterface', 'activated'):
            self.log_warning(_("pyLoad's Web interface is not active, ClickNLoad cannot start"))
            return

        self.pyload.scheduler.addJob(5, self.proxy, threaded=False)


    def deactivate(self):
        if self.server_running:
            self.log_info(_("Shutting down proxy..."))

            self.do_exit = True

            try:
                wakeup_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                wakeup_socket.connect(("127.0.0.1" if any(_ip == self.cnl_ip for _ip in ("0.0.0.0", "")) else self.cnl_ip, self.cnl_port))
                wakeup_socket.close()
            except Exception:
                pass

            self.exit_done.wait(10)
            if self.exit_done.isSet():
                self.log_debug(_("Server exited successfully"))
            else:
                self.log_warning(_("Server was not exited gracefully, shutdown forced"))


    @lock
    @threaded
    def forward(self, source, destination, queue=False):
        if queue:
            old_ids = set(pack.id for pack in self.pyload.api.getCollector())

        forward(source, destination)

        if queue:
            new_ids = set(pack.id for pack in self.pyload.api.getCollector())
            for id in new_ids - old_ids:
                self.pyload.api.pushToQueue(id)


    @threaded
    def proxy(self):
        self.log_info(_("Proxy listening on %s:%s") % (self.cnl_ip or "0.0.0.0", self.cnl_port))
        self._server()


    @threaded
    def _server(self):
        try:
            self.exit_done.clear()
            self.server_running = True

            dock_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            dock_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
            dock_socket.bind((self.cnl_ip, self.cnl_port))
            dock_socket.listen(5)

            while True:
                client_socket, client_addr = dock_socket.accept()

                if not self.do_exit:
                    self.log_debug(_("Connection from %s:%s") % client_addr)

                    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

                    if self.pyload.config.get('webinterface', 'https'):
                        try:
                            server_socket = ssl.wrap_socket(server_socket)

                        except NameError:
                            self.log_error(_("Missing SSL lib"), _("Please disable HTTPS in pyLoad settings"))
                            client_socket.close()
                            continue

                        except Exception, e:
                            self.log_error(_("SSL error: %s") % e.message)
                            client_socket.close()
                            continue

                    server_socket.connect((self.web_ip, self.web_port))

                    self.forward(client_socket, server_socket, self.config.get('dest') == "queue")
                    self.forward(server_socket, client_socket)

                else:
                    break

            dock_socket.close()
            self.server_running = False
            self.exit_done.set()

        except socket.timeout:
            self.log_debug(_("Connection timed out, retrying..."))
            return self._server()

        except socket.error, e:
            self.log_error(e)
            time.sleep(240)
            return self._server()