#  Copyright (c) 2015-2018 Cisco Systems, Inc.
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#  The above copyright notice and this permission notice shall be included in
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#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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"""Destroy Command Module."""

import logging
import os

import click

from molecule import util
from molecule.api import drivers
from molecule.command import base
from molecule.config import DEFAULT_DRIVER

LOG = logging.getLogger(__name__)
MOLECULE_PARALLEL = os.environ.get("MOLECULE_PARALLEL", False)


class Destroy(base.Base):
    """
    Destroy Command Class.

    .. program:: molecule destroy

    .. option:: molecule destroy

        Target the default scenario.

    .. program:: molecule destroy --scenario-name foo

    .. option:: molecule destroy --scenario-name foo

        Targeting a specific scenario.

    .. program:: molecule destroy --all

    .. option:: molecule destroy --all

        Target all scenarios.

    .. program:: molecule destroy --driver-name foo

    .. option:: molecule destroy --driver-name foo

        Targeting a specific driver.

    .. program:: molecule --debug destroy

    .. option:: molecule --debug destroy

        Executing with `debug`.

    .. program:: molecule --base-config base.yml destroy

    .. option:: molecule --base-config base.yml destroy

        Executing with a `base-config`.

    .. program:: molecule --env-file foo.yml destroy

    .. option:: molecule --env-file foo.yml destroy

        Load an env file to read variables from when rendering
        molecule.yml.

    .. program:: molecule destroy --parallel

    .. option:: molecule destroy --parallel

       Run in parallelizable mode.
    """

    def execute(self):
        """
        Execute the actions necessary to perform a `molecule destroy` and \
        returns None.

        :return: None
        """
        if self._config.command_args.get("destroy") == "never":
            msg = "Skipping, '--destroy=never' requested."
            LOG.warning(msg)
            return

        if self._config.driver.delegated and not self._config.driver.managed:
            msg = "Skipping, instances are delegated."
            LOG.warning(msg)
            return

        self._config.provisioner.destroy()
        self._config.state.reset()


@base.click_command_ex()
@click.pass_context
@click.option(
    "--scenario-name",
    "-s",
    default=base.MOLECULE_DEFAULT_SCENARIO_NAME,
    help="Name of the scenario to target. ({})".format(
        base.MOLECULE_DEFAULT_SCENARIO_NAME
    ),
)
@click.option(
    "--driver-name",
    "-d",
    type=click.Choice([str(s) for s in drivers()]),
    help=f"Name of driver to use. ({DEFAULT_DRIVER})",
)
@click.option(
    "--all/--no-all",
    "__all",
    default=MOLECULE_PARALLEL,
    help="Destroy all scenarios. Default is False.",
)
@click.option(
    "--parallel/--no-parallel",
    default=False,
    help="Enable or disable parallel mode. Default is disabled.",
)
def destroy(ctx, scenario_name, driver_name, __all, parallel):  # pragma: no cover
    """Use the provisioner to destroy the instances."""
    args = ctx.obj.get("args")
    subcommand = base._get_subcommand(__name__)
    command_args = {
        "parallel": parallel,
        "subcommand": subcommand,
        "driver_name": driver_name,
    }

    if __all:
        scenario_name = None

    if parallel:
        util.validate_parallel_cmd_args(command_args)

    base.execute_cmdline_scenarios(scenario_name, args, command_args)