#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Fenrir TTY screen reader
# By Chrys, Storm Dragon, and contributers.

from fenrirscreenreader.core import debug
from fenrirscreenreader.core.remoteDriver import RemoteDriver as remoteDriver
from fenrirscreenreader.core.eventData import FenrirEventType

import select
import socket
import os
import os.path


class driver(remoteDriver):
    def __init__(self):
        remoteDriver.__init__(self)

    def initialize(self, environment):
        self.env = environment
        self.env['runtime']['ProcessManager'].add_custom_event_thread(
            self.watch_dog, multiprocess=True)

    def watch_dog(self, active, event_queue):
        # echo "command say this is a test" | nc localhost 22447
        self.fenrirSock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.fenrirSock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.host = '127.0.0.1'
        self.port = self.env['runtime']['SettingsManager'].get_setting_as_int(
            'remote', 'port')
        self.fenrirSock.bind((self.host, self.port))
        self.fenrirSock.listen(1)
        while active.value:
            try:
                r, _, _ = select.select([self.fenrirSock], [], [], 0.8)
            except select.error:
                break
            if r == []:
                continue
            if self.fenrirSock in r:
                client_sock, client_addr = self.fenrirSock.accept()
            try:
                rawdata = client_sock.recv(8129)
            except Exception as e:
                self.env['runtime']['DebugManager'].write_debug_out(
                    'tcpDriver watch_dog: Error receiving data from client: ' + str(e),
                    debug.DebugLevel.ERROR)
            try:
                data = rawdata.decode("utf-8").rstrip().lstrip()
                event_queue.put({"Type": FenrirEventType.remote_incomming,
                                "data": data
                                })
            except Exception as e:
                self.env['runtime']['DebugManager'].write_debug_out(
                    'tcpDriver watch_dog: Error decoding/queuing data: ' + str(e),
                    debug.DebugLevel.ERROR)
            try:
                client_sock.close()
            except Exception as e:
                self.env['runtime']['DebugManager'].write_debug_out(
                    'tcpDriver watch_dog: Error closing client socket: ' + str(e),
                    debug.DebugLevel.ERROR)
        if self.fenrirSock:
            self.fenrirSock.close()
            self.fenrirSock = None