#!/usr/bin/python
#
# 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


DOCUMENTATION = """
module: nxos_rpm
extends_documentation_fragment:
- cisco.nxos.nxos
short_description: Install patch or feature rpms on Cisco NX-OS devices.
description:
- Install software maintenance upgrade (smu) RPMS and 3rd party RPMS on Cisco NX-OS
  devices.
version_added: 1.0.0
author: Sai Chintalapudi (@saichint)
notes:
- Tested against NXOSv 7.0(3)I2(5), 7.0(3)I4(6), 7.0(3)I5(3), 7.0(3)I6(1), 7.0(3)I7(3)
- Unsupported for Cisco MDS
- For patches, the minimum platform version needed is 7.0(3)I2(5)
- For feature rpms, the minimum platform version needed is 7.0(3)I6(1)
- The module manages the entire RPM lifecycle (Add, activate, commit, deactivate,
  remove)
- For reload patches, this module is NOT idempotent until the patch is committed.
options:
  pkg:
    description:
    - Name of the RPM package.
    type: str
  file_system:
    description:
    - The remote file system of the device. If omitted, devices that support a file_system
      parameter will use their default values.
    default: bootflash
    type: str
  aggregate:
    description:
    - List of RPM/patch definitions.
    type: list
    elements: dict
    suboptions:
      pkg:
        description:
        - Name of the RPM package.
        required: True
        type: str
      file_system:
        description:
        - The remote file system of the device. If omitted, devices that support a file_system
          parameter will use their default values.
        type: str
      state:
        description:
        - If the state is present, the rpm will be installed, If the state is absent,
          it will be removed.
        choices:
        - present
        - absent
        type: str
  state:
    description:
    - If the state is present, the rpm will be installed, If the state is absent,
      it will be removed.
    default: present
    choices:
    - present
    - absent
    type: str
"""

EXAMPLES = """
- cisco.nxos.nxos_rpm:
    pkg: nxos.sample-n9k_ALL-1.0.0-7.0.3.I7.3.lib32_n9000.rpm
"""

RETURN = """
commands:
    description: commands sent to the device
    returned: always
    type: list
    sample: ["install add bootflash:nxos.sample-n9k_ALL-1.0.0-7.0.3.I7.3.lib32_n9000.rpm forced",
             "install activate nxos.sample-n9k_ALL-1.0.0-7.0.3.I7.3.lib32_n9000 forced",
             "install commit nxos.sample-n9k_ALL-1.0.0-7.0.3.I7.3.lib32_n9000"]
"""


import time

from copy import deepcopy

from ansible.module_utils.basic import AnsibleModule
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.utils import (
    remove_default_spec,
)

from ansible_collections.cisco.nxos.plugins.module_utils.network.nxos.nxos import (
    load_config,
    run_commands,
)


def execute_show_command(command, module):
    iteration = 0
    cmds = [{"command": command, "output": "text"}]

    while iteration < 10:
        body = run_commands(module, cmds)[0]
        if body:
            return body
        else:
            time.sleep(2)
            iteration += 1


def remote_file_exists(module, dst, file_system):
    command = "dir {0}:/{1}".format(file_system, dst)
    body = execute_show_command(command, module)
    if "No such file" in body:
        return False
    return True


def config_cmd_operation(module, cmd):
    iteration = 0
    while iteration < 10:
        msg = load_config(module, [cmd], True)
        if msg:
            if (
                "another install operation is in progress" in msg[0].lower()
                or "failed" in msg[0].lower()
            ):
                time.sleep(2)
                iteration += 1
            else:
                return
        else:
            return


def validate_operation(module, show_cmd, cfg_cmd, pkg, pkg_not_present):
    iteration = 0
    while iteration < 10:
        body = execute_show_command(show_cmd, module)
        if pkg_not_present:
            if pkg not in body:
                return
        else:
            if pkg in body:
                return
        time.sleep(2)
        iteration += 1

    err = 'Operation "{0}" Failed'.format(cfg_cmd)
    module.fail_json(msg=err)


def add_operation(module, show_cmd, file_system, full_pkg, pkg):
    cmd = "install add {0}:{1}".format(file_system, full_pkg)
    config_cmd_operation(module, cmd)
    validate_operation(module, show_cmd, cmd, pkg, False)
    return cmd


def activate_operation(module, show_cmd, pkg):
    cmd = "install activate {0} forced".format(pkg)
    config_cmd_operation(module, cmd)
    validate_operation(module, show_cmd, cmd, pkg, False)
    return cmd


def activate_reload(module, pkg, flag):
    iteration = 0
    if flag:
        cmd = "install activate {0} forced".format(pkg)
    else:
        cmd = "install deactivate {0} forced".format(pkg)
    opts = {"ignore_timeout": True}
    while iteration < 10:
        msg = load_config(module, [cmd], True, opts)
        if msg:
            if isinstance(msg[0], int):
                if msg[0] == -32603:
                    return cmd
            elif isinstance(msg[0], str):
                if "socket is closed" in msg[0].lower():
                    return cmd
                if (
                    "another install operation is in progress" in msg[0].lower()
                    or "failed" in msg[0].lower()
                ):
                    time.sleep(2)
        iteration += 1


def commit_operation(module, show_cmd, pkg, flag):
    cmd = "install commit {0}".format(pkg)
    config_cmd_operation(module, cmd)
    validate_operation(module, show_cmd, cmd, pkg, flag)
    return cmd


def deactivate_operation(module, show_cmd, pkg, flag):
    cmd = "install deactivate {0} forced".format(pkg)
    config_cmd_operation(module, cmd)
    validate_operation(module, show_cmd, cmd, pkg, flag)
    return cmd


def terminal_operation(module, config):
    if config:
        cmd = "terminal dont-ask"
    else:
        cmd = "no terminal dont-ask"
    config_cmd_operation(module, cmd)
    return cmd


def remove_operation(module, show_cmd, pkg):
    commands = []
    commands.append(terminal_operation(module, True))
    cmd = "install remove {0} forced".format(pkg)
    config_cmd_operation(module, cmd)
    validate_operation(module, show_cmd, cmd, pkg, True)
    commands.append(cmd)
    commands.append(terminal_operation(module, False))
    return commands


def install_remove_rpm(module, full_pkg, file_system, state):
    commands = []
    reload_patch = False

    splitted_pkg = full_pkg.split(".")
    pkg = ".".join(splitted_pkg[0:-1])

    show_inactive = "show install inactive"
    show_active = "show install active"
    show_commit = "show install committed"
    show_patches = "show install patches"
    show_pkg_info = "show install pkg-info {0}".format(pkg)

    if state == "present":
        inactive_body = execute_show_command(show_inactive, module)
        active_body = execute_show_command(show_active, module)

        if pkg not in inactive_body and pkg not in active_body:
            commands.append(add_operation(module, show_inactive, file_system, full_pkg, pkg))

        patch_type_body = execute_show_command(show_pkg_info, module)
        if patch_type_body and "Patch Type    :  reload" in patch_type_body:
            # This is reload smu/patch rpm
            reload_patch = True

        if pkg not in active_body:
            if reload_patch:
                commands.append(activate_reload(module, pkg, True))
                return commands
            else:
                commands.append(activate_operation(module, show_active, pkg))

        commit_body = execute_show_command(show_commit, module)
        if pkg not in commit_body:
            patch_body = execute_show_command(show_patches, module)
            if pkg in patch_body:
                # This is smu/patch rpm
                commands.append(commit_operation(module, show_commit, pkg, False))
            else:
                err = 'Operation "install activate {0} forced" Failed'.format(pkg)
                module.fail_json(msg=err)

    else:
        commit_body = execute_show_command(show_commit, module)
        active_body = execute_show_command(show_active, module)

        patch_type_body = execute_show_command(show_pkg_info, module)
        if patch_type_body and "Patch Type    :  reload" in patch_type_body:
            # This is reload smu/patch rpm
            reload_patch = True

        if pkg in commit_body and pkg in active_body:
            if reload_patch:
                commands.append(activate_reload(module, pkg, False))
                return commands
            else:
                commands.append(deactivate_operation(module, show_active, pkg, True))
                commit_body = execute_show_command(show_commit, module)
                if pkg in commit_body:
                    # This is smu/patch rpm
                    commands.append(commit_operation(module, show_commit, pkg, True))
                commands.extend(remove_operation(module, show_inactive, pkg))

        elif pkg in commit_body:
            # This is smu/patch rpm
            commands.append(commit_operation(module, show_commit, pkg, True))
            commands.extend(remove_operation(module, show_inactive, pkg))

        elif pkg in active_body:
            # This is smu/patch rpm
            if reload_patch:
                commands.append(activate_reload(module, pkg, False))
                return commands
            else:
                commands.append(deactivate_operation(module, show_inactive, pkg, False))
                commands.extend(remove_operation(module, show_inactive, pkg))

        else:
            inactive_body = execute_show_command(show_inactive, module)
            if pkg in inactive_body:
                commands.extend(remove_operation(module, show_inactive, pkg))

    return commands


def main():
    element_spec = dict(
        pkg=dict(type="str"),
        file_system=dict(type="str", default="bootflash"),
        state=dict(choices=["absent", "present"], default="present"),
    )

    aggregate_spec = deepcopy(element_spec)
    aggregate_spec["pkg"] = dict(required=True)

    # remove default in aggregate spec, to handle common arguments
    remove_default_spec(aggregate_spec)

    argument_spec = dict(aggregate=dict(type="list", elements="dict", options=aggregate_spec))

    argument_spec.update(element_spec)
    required_one_of = [["pkg", "aggregate"]]
    mutually_exclusive = [["pkg", "aggregate"]]

    module = AnsibleModule(
        argument_spec=argument_spec,
        required_one_of=required_one_of,
        mutually_exclusive=mutually_exclusive,
        supports_check_mode=False,
    )

    warnings = list()
    results = {"changed": False, "commands": [], "warnings": warnings}

    aggregate = module.params.get("aggregate")
    objects = []
    if aggregate:
        for item in aggregate:
            for key in item:
                if item.get(key) is None:
                    item[key] = module.params[key]

            d = item.copy()
            objects.append(d)
    else:
        objects.append(
            {
                "pkg": module.params["pkg"],
                "file_system": module.params["file_system"],
                "state": module.params["state"],
            },
        )

    for obj in objects:
        if obj["state"] == "present":
            remote_exists = remote_file_exists(module, obj["pkg"], file_system=obj["file_system"])

            if not remote_exists:
                module.fail_json(msg="The requested package doesn't exist on the device")

        cmds = install_remove_rpm(module, obj["pkg"], obj["file_system"], obj["state"])

        if cmds:
            results["changed"] = True
            results["commands"].extend(cmds)

    module.exit_json(**results)


if __name__ == "__main__":
    main()