#
# (c) 2016 Red Hat Inc.
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import absolute_import, division, print_function

__metaclass__ = type

import copy
import re
import sys

from ansible import constants as C
from ansible_collections.ansible.netcommon.plugins.action.network import (
    ActionModule as ActionNetworkModule,
)
from ansible.module_utils.connection import Connection
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.utils import (
    load_provider,
)
from ansible_collections.cisco.nxos.plugins.module_utils.network.nxos.nxos import (
    nxos_provider_spec,
)
from ansible.utils.display import Display

display = Display()


class ActionModule(ActionNetworkModule):
    def run(self, tmp=None, task_vars=None):
        del tmp  # tmp no longer has any effect

        module_name = self._task.action.split(".")[-1]
        self._config_module = (
            True if module_name in ["nxos_config", "config"] else False
        )
        persistent_connection = self._play_context.connection.split(".")[-1]

        warnings = []

        if (
            self._play_context.connection in ("httpapi", "local")
            or self._task.args.get("provider", {}).get("transport") == "nxapi"
        ) and module_name in ("nxos_file_copy", "nxos_nxapi"):
            return {
                "failed": True,
                "msg": "Transport type 'nxapi' is not valid for '%s' module."
                % (module_name),
            }

        if module_name == "nxos_file_copy":
            # when file_pull is enabled, the file_pull_timeout and connect_ssh_port options
            # will override persistent_command_timeout and port
            # this has been kept for backwards compatibility till these options are removed
            if persistent_connection != "network_cli":
                return {
                    "failed": True,
                    "msg": "Connection type must be fully qualified name for network_cli connection type, got %s"
                    % self._play_context.connection,
                }

            conn = Connection(self._connection.socket_path)
            file_pull = self._task.args.get("file_pull", False)
            file_pull_timeout = self._task.args.get("file_pull_timeout", 300)
            connect_ssh_port = self._task.args.get("connect_ssh_port", 22)

            if file_pull:
                conn.set_option(
                    "persistent_command_timeout", file_pull_timeout
                )
                conn.set_option("port", connect_ssh_port)

        if module_name == "nxos_install_os":
            connection = self._connection
            if connection.transport == "local":
                persistent_command_timeout = C.PERSISTENT_COMMAND_TIMEOUT
                persistent_connect_timeout = C.PERSISTENT_CONNECT_TIMEOUT
            else:
                persistent_command_timeout = connection.get_option(
                    "persistent_command_timeout"
                )
                persistent_connect_timeout = connection.get_option(
                    "persistent_connect_timeout"
                )

            display.vvvv(
                "PERSISTENT_COMMAND_TIMEOUT is %s"
                % str(persistent_command_timeout),
                self._play_context.remote_addr,
            )
            display.vvvv(
                "PERSISTENT_CONNECT_TIMEOUT is %s"
                % str(persistent_connect_timeout),
                self._play_context.remote_addr,
            )
            if (
                persistent_command_timeout < 600
                or persistent_connect_timeout < 600
            ):
                msg = (
                    "PERSISTENT_COMMAND_TIMEOUT and PERSISTENT_CONNECT_TIMEOUT"
                )
                msg += " must be set to 600 seconds or higher when using nxos_install_os module."
                msg += " Current persistent_command_timeout setting:" + str(
                    persistent_command_timeout
                )
                msg += " Current persistent_connect_timeout setting:" + str(
                    persistent_connect_timeout
                )
                return {"failed": True, "msg": msg}

        if persistent_connection in ("network_cli", "httpapi"):
            provider = self._task.args.get("provider", {})
            if any(provider.values()):
                display.warning(
                    "provider is unnecessary when using %s and will be ignored"
                    % self._play_context.connection
                )
                del self._task.args["provider"]

            if module_name == "nxos_gir":
                conn = Connection(self._connection.socket_path)
                persistent_command_timeout = conn.get_option(
                    "persistent_command_timeout"
                )
                gir_timeout = 200
                if persistent_command_timeout < gir_timeout:
                    conn.set_option("persistent_command_timeout", gir_timeout)
                    msg = (
                        "timeout value extended to %ss for nxos_gir"
                        % gir_timeout
                    )
                    display.warning(msg)

        elif self._play_context.connection == "local":
            provider = load_provider(nxos_provider_spec, self._task.args)
            transport = provider["transport"] or "cli"

            display.vvvv(
                "connection transport is %s" % transport,
                self._play_context.remote_addr,
            )

            if transport == "cli":
                pc = copy.deepcopy(self._play_context)
                pc.connection = "ansible.netcommon.network_cli"
                pc.network_os = "cisco.nxos.nxos"
                pc.remote_addr = (
                    provider["host"] or self._play_context.remote_addr
                )
                pc.port = int(
                    provider["port"] or self._play_context.port or 22
                )
                pc.remote_user = (
                    provider["username"] or self._play_context.connection_user
                )
                pc.password = (
                    provider["password"] or self._play_context.password
                )
                pc.private_key_file = (
                    provider["ssh_keyfile"]
                    or self._play_context.private_key_file
                )
                pc.become = provider["authorize"] or False
                if pc.become:
                    pc.become_method = "enable"
                pc.become_pass = provider["auth_pass"]

                connection = self._shared_loader_obj.connection_loader.get(
                    "ansible.netcommon.persistent",
                    pc,
                    sys.stdin,
                    task_uuid=self._task._uuid,
                )

                # TODO: Remove below code after ansible minimal is cut out
                if connection is None:
                    pc.connection = "network_cli"
                    pc.network_os = "nxos"
                    connection = self._shared_loader_obj.connection_loader.get(
                        "persistent", pc, sys.stdin, task_uuid=self._task._uuid
                    )

                display.vvv(
                    "using connection plugin %s (was local)" % pc.connection,
                    pc.remote_addr,
                )

                command_timeout = (
                    int(provider["timeout"])
                    if provider["timeout"]
                    else connection.get_option("persistent_command_timeout")
                )
                connection.set_options(
                    direct={"persistent_command_timeout": command_timeout}
                )

                socket_path = connection.run()
                display.vvvv("socket_path: %s" % socket_path, pc.remote_addr)
                if not socket_path:
                    return {
                        "failed": True,
                        "msg": "unable to open shell. Please see: "
                        + "https://docs.ansible.com/ansible/network_debug_troubleshooting.html#unable-to-open-shell",
                    }

                task_vars["ansible_socket"] = socket_path

            else:
                self._task.args[
                    "provider"
                ] = ActionModule.nxapi_implementation(
                    provider, self._play_context
                )
                warnings.append(
                    [
                        "connection local support for this module is deprecated and will be removed in version 2.14,"
                        " use connection either httpapi or ansible.netcommon.httpapi (whichever is applicable)"
                    ]
                )
        else:
            return {
                "failed": True,
                "msg": "Connection type %s is not valid for this module"
                % self._play_context.connection,
            }

        result = super(ActionModule, self).run(task_vars=task_vars)
        if warnings:
            if "warnings" in result:
                result["warnings"].extend(warnings)
            else:
                result["warnings"] = warnings
        return result

    @staticmethod
    def nxapi_implementation(provider, play_context):
        provider["transport"] = "nxapi"
        if provider.get("host") is None:
            provider["host"] = play_context.remote_addr

        if provider.get("port") is None:
            if provider.get("use_ssl"):
                provider["port"] = 443
            else:
                provider["port"] = 80

        if provider.get("timeout") is None:
            provider["timeout"] = C.PERSISTENT_COMMAND_TIMEOUT

        if provider.get("username") is None:
            provider["username"] = play_context.connection_user

        if provider.get("password") is None:
            provider["password"] = play_context.password

        if provider.get("use_ssl") is None:
            provider["use_ssl"] = False

        if provider.get("validate_certs") is None:
            provider["validate_certs"] = True

        return provider