"""
Module for sending and receiving data over a socket connection with the PiSCSI backend
"""

from flask import abort
from flask_babel import _

from piscsi.exceptions import (
    EmptySocketChunkException,
    InvalidProtobufResponse,
    FailedSocketConnectionException,
)
from piscsi.socket_cmds import SocketCmds


class SocketCmdsFlask(SocketCmds):
    """
    Class for sending and receiving data over a socket connection with the PiSCSI backend
    """

    # pylint: disable=useless-super-delegation
    def __init__(self, host="localhost", port=6868):
        super().__init__(host, port)

    def send_pb_command(self, payload):
        """
        Takes a (str) containing a serialized protobuf as argument.
        Establishes a socket connection with PiSCSI.
        """
        try:
            return super().send_pb_command(payload)
        except FailedSocketConnectionException as err:
            # After failing all attempts, throw a 404 error
            abort(
                404,
                _(
                    "The PiSCSI Web Interface failed to connect to PiSCSI at "
                    "%(host)s:%(port)s with error: %(error_msg)s. The PiSCSI "
                    "process is not running or may have crashed.",
                    host=self.host,
                    port=self.port,
                    error_msg=str(err),
                ),
            )
            return None

    def send_over_socket(self, sock, payload):
        """Sends a payload over a given socket"""
        try:
            return super().send_over_socket(sock, payload)
        except EmptySocketChunkException:
            abort(
                503,
                _(
                    "The PiSCSI Web Interface lost connection to PiSCSI. "
                    "Please go back and try again. "
                    "If the issue persists, please report a bug."
                ),
            )
            return None
        except InvalidProtobufResponse:
            abort(
                500,
                _(
                    "The PiSCSI Web Interface did not get a valid response from PiSCSI. "
                    "Please go back and try again. "
                    "If the issue persists, please report a bug."
                ),
            )
            return None