#!/usr/bin/env python3
# class taken from darksidelemm
# rigctl - https://github.com/darksidelemm/rotctld-web-gui/blob/master/rotatorgui.py#L35
#
# modified and adjusted to FreeDATA needs by DJ2LS

import contextlib
import socket
import time
import structlog
import threading
import static
from static import ARQ, AudioParam, Beacon, Channel, Daemon, HamlibParam, ModemParam, Station, TCIParam


class radio:
    """rigctld (hamlib) communication class"""

    log = structlog.get_logger("radio (rigctld)")

    def __init__(self, hostname="localhost", port=4532, poll_rate=5, timeout=5):
        """Open a connection to rigctld, and test it for validity"""
        self.ptt_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.data_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

        self.ptt_connected = False
        self.data_connected = False
        self.hostname = hostname
        self.port = port
        self.connection_attempts = 5

        # class wide variable for some parameters
        self.bandwidth = ''
        self.frequency = ''
        self.mode = ''
        self.alc = ''
        self.strength = ''
        self.rf = ''

    def open_rig(
            self,
            rigctld_ip,
            rigctld_port
    ):
        """

        Args:
          rigctld_ip:
          rigctld_port:

        Returns:

        """
        self.hostname = rigctld_ip
        self.port = int(rigctld_port)

        # _ptt_connect = self.ptt_connect()
        # _data_connect = self.data_connect()

        ptt_thread = threading.Thread(target=self.ptt_connect, args=[], daemon=True)
        ptt_thread.start()

        data_thread = threading.Thread(target=self.data_connect, args=[], daemon=True)
        data_thread.start()

        # wait some time
        threading.Event().wait(0.5)

        if self.ptt_connected and self.data_connected:
            self.log.debug("Rigctl DATA/PTT initialized")
            return True

        self.log.error(
            "[RIGCTLD] Can't connect!", ip=self.hostname, port=self.port
        )
        return False

    def ptt_connect(self):
        """Connect to rigctld instance"""
        while True:

            if not self.ptt_connected:
                try:
                    self.ptt_connection = socket.create_connection((self.hostname, self.port))
                    self.ptt_connected = True
                    self.log.info(
                        "[RIGCTLD] Connected PTT instance to rigctld!", ip=self.hostname, port=self.port
                    )
                except Exception as err:
                    # ConnectionRefusedError: [Errno 111] Connection refused
                    self.close_rig()
                    self.log.warning(
                        "[RIGCTLD] PTT Reconnect...",
                        ip=self.hostname,
                        port=self.port,
                        e=err,
                    )

            threading.Event().wait(0.5)

    def data_connect(self):
        """Connect to rigctld instance"""
        while True:
            if not self.data_connected:
                try:
                    self.data_connection = socket.create_connection((self.hostname, self.port))
                    self.data_connected = True
                    self.log.info(
                        "[RIGCTLD] Connected DATA instance to rigctld!", ip=self.hostname, port=self.port
                    )
                except Exception as err:
                    # ConnectionRefusedError: [Errno 111] Connection refused
                    self.close_rig()
                    self.log.warning(
                        "[RIGCTLD] DATA Reconnect...",
                        ip=self.hostname,
                        port=self.port,
                        e=err,
                    )
            threading.Event().wait(0.5)

    def close_rig(self):
        """ """
        self.ptt_sock.close()
        self.data_sock.close()
        self.ptt_connected = False
        self.data_connected = False

    def send_ptt_command(self, command, expect_answer) -> bytes:
        """Send a command to the connected rotctld instance,
            and return the return value.

        Args:
          command:

        """
        if self.ptt_connected:
            try:
                self.ptt_connection.sendall(command + b"\n")
            except Exception:
                self.log.warning(
                    "[RIGCTLD] Command not executed!",
                    command=command,
                    ip=self.hostname,
                    port=self.port,
                )
                self.ptt_connected = False
        return b""

    def send_data_command(self, command, expect_answer) -> bytes:
        """Send a command to the connected rotctld instance,
            and return the return value.

        Args:
          command:

        """
        if self.data_connected:
            self.data_connection.setblocking(False)
            #Allow a little more time for a response from rigctld before generating a timeout, seems to have no ill effects on a well behaving setup and fixes Issue #373
            self.data_connection.settimeout(0.30)
            try:
                self.data_connection.sendall(command + b"\n")


            except Exception:
                self.log.warning(
                    "[RIGCTLD] Command not executed!",
                    command=command,
                    ip=self.hostname,
                    port=self.port,
                )
                self.data_connected = False

            try:
                # recv seems to be blocking so in case of ptt we don't need the response
                # maybe this speeds things up and avoids blocking states
                recv = True
                data = b''

                while recv:
                    try:

                        data = self.data_connection.recv(4800)

                    except socket.timeout:
                        recv = False

                return data

                # return self.data_connection.recv(64) if expect_answer else True
            except Exception:
                self.log.warning(
                    "[RIGCTLD] No command response!",
                    command=command,
                    ip=self.hostname,
                    port=self.port,
                )
                self.data_connected = False
        return b""

    def get_status(self):
        """ """
        return "connected" if self.data_connected and self.ptt_connected else "unknown/disconnected"

    def get_level(self):
        try:
            data = self.send_data_command(b"l RF", True)
            data = data.split(b"\n")
            rf = data[0].decode("utf-8")
            if 'RPRT' not in rf:
                try:
                    self.rf = str(rf)
                except ValueError:
                    self.rf = str(rf)

            return self.rf
        except Exception:
            return self.rf

    def get_strength(self):
        try:
            data = self.send_data_command(b"l STRENGTH", True)
            data = data.split(b"\n")
            strength = data[0].decode("utf-8")
            if 'RPRT' not in strength:
                try:
                    self.strength = str(strength)
                except ValueError:
                    self.strength = str(strength)

            return self.strength
        except Exception:
            return self.strength

    def get_alc(self):
        try:
            data = self.send_data_command(b"l ALC", True)
            data = data.split(b"\n")
            alc = data[0].decode("utf-8")
            if 'RPRT' not in alc:
                try:
                    alc = float(alc)
                    self.alc = alc if alc != 0.0 else HamlibParam.alc
                except ValueError:
                    self.alc = 0.0

            return self.alc
        except Exception:
            return self.alc

    def get_mode(self):
        """ """
        try:
            data = self.send_data_command(b"m", True)
            data = data.split(b"\n")
            data = data[0].decode("utf-8")
            if 'RPRT' not in data:
                try:
                    data = int(data)
                except ValueError:
                    self.mode = str(data)

            return self.mode
        except Exception:
            return self.mode

    def get_bandwidth(self):
        """ """
        try:
            data = self.send_data_command(b"m", True)
            data = data.split(b"\n")
            data = data[1].decode("utf-8")

            if 'RPRT' not in data and data not in ['']:
                with contextlib.suppress(ValueError):
                    self.bandwidth = int(data)
            return self.bandwidth
        except Exception:
            return self.bandwidth

    def get_frequency(self):
        """ """
        try:
            data = self.send_data_command(b"f", True)
            data = data.decode("utf-8")
            if 'RPRT' not in data and data not in [0, '0', '']:
                with contextlib.suppress(ValueError):
                    data = int(data)
                    # make sure we have a frequency and not bandwidth
                    if data >= 10000:
                        self.frequency = data
            return self.frequency
        except Exception:
            return self.frequency

    def get_ptt(self):
        """ """
        try:
            return self.send_data_command(b"t", True)
        except Exception:
            return False

    def set_ptt(self, state):
        """

        Args:
          state:

        Returns:

        """
        try:
            if state:
                self.send_ptt_command(b"T 1", False)
            else:
                self.send_ptt_command(b"T 0", False)
            return state
        except Exception:
            return False

    def set_frequency(self, frequency):
        """

        Args:
          frequency:

        Returns:

        """
        try:
            command = bytes(f"F {frequency}", "utf-8")
            self.send_data_command(command, False)
        except Exception:
            return False

    def set_mode(self, mode):
        """

        Args:
          mode:

        Returns:

        """
        try:
            command = bytes(f"M {mode} {self.bandwidth}", "utf-8")
            self.send_data_command(command, False)
        except Exception:
            return False