"""
Dell EMC PowerSwitch platforms running Enterprise SONiC Distribution by Dell Technologies Driver
- supports dellenterprisesonic.
"""
from netmiko.no_enable import NoEnable
from netmiko.cisco_base_connection import CiscoSSHConnection
from netmiko import log


class DellSonicSSH(NoEnable, CiscoSSHConnection):
    """
    Dell EMC PowerSwitch platforms running Enterprise SONiC Distribution
    by Dell Technologies Driver - supports dellenterprisesonic.
    """

    def session_preparation(self) -> None:
        """Prepare the session after the connection has been established."""
        self._test_channel_read(pattern=r"[>$#]")
        self._enter_shell()
        self.disable_paging()
        self.set_base_prompt(alt_prompt_terminator="$")

    def config_mode(
        self,
        config_command: str = "configure terminal",
        pattern: str = r"\#",
        re_flags: int = 0,
    ) -> str:
        return super().config_mode(
            config_command=config_command, pattern=pattern, re_flags=re_flags
        )

    def _enter_shell(self) -> str:
        """Enter the sonic-cli Shell."""
        log.debug("Enter sonic-cli Shell.")
        return self._send_command_str("sonic-cli", expect_string=r"\#")

    def _return_cli(self) -> str:
        """Return to the CLI."""
        return self._send_command_str("exit", expect_string=r"\$")