#!/usr/bin/python

# -*- coding: utf-8 -*-

# Authors:

#   Thomas Woerner <twoerner@redhat.com>

#

# Copyright (C) 2019 Red Hat

# see file 'COPYING' for use and warranty information

#

# This program 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.

#

# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

ANSIBLE_METADATA = {

    "metadata_version": "1.0",

    "supported_by": "community",

    "status": ["preview"],

}

DOCUMENTATION = """

---

module: ipapwpolicy

short description: Manage FreeIPA pwpolicies

description: Manage FreeIPA pwpolicies

options:

  ipaadmin_principal:

    description: The admin principal

    default: admin

  ipaadmin_password:

    description: The admin password

    required: false

  name:

    description: The group name

    required: false

    aliases: ["cn"]

  maxlife:

    description: Maximum password lifetime (in days)

    type: int

    required: false

    aliases: ["krbmaxpwdlife"]

  minlife:

    description: Minimum password lifetime (in hours)

    type: int

    required: false

    aliases: ["krbminpwdlife"]

  history:

    description: Password history size

    type: int

    required: false

    aliases: ["krbpwdhistorylength"]

  minclasses:

    description: Minimum number of character classes

    type: int

    required: false

    aliases: ["krbpwdmindiffchars"]

  minlength:

    description: Minimum length of password

    type: int

    required: false

    aliases: ["krbpwdminlength"]

  priority:

    description: Priority of the policy (higher number means lower priority)

    type: int

    required: false

    aliases: ["cospriority"]

  maxfail:

    description: Consecutive failures before lockout

    type: int

    required: false

    aliases: ["krbpwdmaxfailure"]

  failinterval:

    description: Period after which failure count will be reset (seconds)

    type: int

    required: false

    aliases: ["krbpwdfailurecountinterval"]

  lockouttime:

    description: Period for which lockout is enforced (seconds)

    type: int

    required: false

    aliases: ["krbpwdlockoutduration"]

  state:

    description: State to ensure

    default: present

    choices: ["present", "absent"]

author:

    - Thomas Woerner

"""

EXAMPLES = """

# Ensure pwpolicy is set for ops

- ipapwpolicy:

    ipaadmin_password: SomeADMINpassword

    name: ops

    minlife: 7

    maxlife: 49

    history: 5

    priority: 1

    lockouttime: 300

    minlength: 8

"""

RETURN = """

"""

from ansible.module_utils.basic import AnsibleModule

from ansible.module_utils._text import to_text

from ansible.module_utils.ansible_freeipa_module import temp_kinit, \

    temp_kdestroy, valid_creds, api_connect, api_command, compare_args_ipa

def find_pwpolicy(module, name):

    _args = {

        "all": True,

        "cn": to_text(name),

    }

    _result = api_command(module, "pwpolicy_find", to_text(name), _args)

    if len(_result["result"]) > 1:

        module.fail_json(

            msg="There is more than one pwpolicy '%s'" % (name))

    elif len(_result["result"]) == 1:

        return _result["result"][0]

    else:

        return None

def gen_args(maxlife, minlife, history, minclasses, minlength, priority,

             maxfail, failinterval, lockouttime):

    _args = {}

    if maxlife is not None:

        _args["krbmaxpwdlife"] = maxlife

    if minlife is not None:

        _args["krbminpwdlife"] = minlife

    if history is not None:

        _args["krbpwdhistorylength"] = history

    if minclasses is not None:

        _args["krbpwdmindiffchars"] = minclasses

    if minlength is not None:

        _args["krbpwdminlength"] = minlength

    if priority is not None:

        _args["cospriority"] = priority

    if maxfail is not None:

        _args["krbpwdmaxfailure"] = maxfail

    if failinterval is not None:

        _args["krbpwdfailurecountinterval"] = failinterval

    if lockouttime is not None:

        _args["krbpwdlockoutduration"] = lockouttime

    return _args

def main():

    ansible_module = AnsibleModule(

        argument_spec=dict(

            # general

            ipaadmin_principal=dict(type="str", default="admin"),

            ipaadmin_password=dict(type="str", required=False, no_log=True),

            name=dict(type="list", aliases=["cn"], default=None,

                      required=False),

            # present

            maxlife=dict(type="int", aliases=["krbmaxpwdlife"], default=None),

            minlife=dict(type="int", aliases=["krbminpwdlife"], default=None),

            history=dict(type="int", aliases=["krbpwdhistorylength"],

                         default=None),

            minclasses=dict(type="int", aliases=["krbpwdmindiffchars"],

                            default=None),

            minlength=dict(type="int", aliases=["krbpwdminlength"],

                           default=None),

            priority=dict(type="int", aliases=["cospriority"], default=None),

            maxfail=dict(type="int", aliases=["krbpwdmaxfailure"],

                         default=None),

            failinterval=dict(type="int",

                              aliases=["krbpwdfailurecountinterval"],

                              default=None),

            lockouttime=dict(type="int", aliases=["krbpwdlockoutduration"],

                             default=None),

            # state

            state=dict(type="str", default="present",

                       choices=["present", "absent"]),

        ),

        supports_check_mode=True,

    )

    ansible_module._ansible_debug = True

    # Get parameters

    # general

    ipaadmin_principal = ansible_module.params.get("ipaadmin_principal")

    ipaadmin_password = ansible_module.params.get("ipaadmin_password")

    names = ansible_module.params.get("name")

    # present

    maxlife = ansible_module.params.get("maxlife")

    minlife = ansible_module.params.get("minlife")

    history = ansible_module.params.get("history")

    minclasses = ansible_module.params.get("minclasses")

    minlength = ansible_module.params.get("minlength")

    priority = ansible_module.params.get("priority")

    maxfail = ansible_module.params.get("maxfail")

    failinterval = ansible_module.params.get("failinterval")

    lockouttime = ansible_module.params.get("lockouttime")

    # state

    state = ansible_module.params.get("state")

    # Check parameters

    if names is None:

        names = ["global_policy"]

    if state == "present":

        if len(names) != 1:

            ansible_module.fail_json(

                msg="Only one pwpolicy can be set at a time.")

    if state == "absent":

        if len(names) < 1:

            ansible_module.fail_json(msg="No name given.")

        if "global_policy" in names:

            ansible_module.fail_json(

                msg="'global_policy' can not be made absent.")

        invalid = ["maxlife", "minlife", "history", "minclasses",

                   "minlength", "priority", "maxfail", "failinterval",

                   "lockouttime"]

        for x in invalid:

            if vars()[x] is not None:

                ansible_module.fail_json(

                    msg="Argument '%s' can not be used with state '%s'" %

                    (x, state))

    # Init

    changed = False

    exit_args = {}

    ccache_dir = None

    ccache_name = None

    try:

        if not valid_creds(ansible_module, ipaadmin_principal):

            ccache_dir, ccache_name = temp_kinit(ipaadmin_principal,

                                                 ipaadmin_password)

        api_connect()

        commands = []

        for name in names:

            # Try to find pwpolicy

            res_find = find_pwpolicy(ansible_module, name)

            # Create command

            if state == "present":

                # Generate args

                args = gen_args(maxlife, minlife, history, minclasses,

                                minlength, priority, maxfail, failinterval,

                                lockouttime)

                # Found the pwpolicy

                if res_find is not None:

                    # For all settings is args, check if there are

                    # different settings in the find result.

                    # If yes: modify

                    if not compare_args_ipa(ansible_module, args,

                                            res_find):

                        commands.append([name, "pwpolicy_mod", args])

                else:

                    commands.append([name, "pwpolicy_add", args])

            elif state == "absent":

                if res_find is not None:

                    commands.append([name, "pwpolicy_del", {}])

            else:

                ansible_module.fail_json(msg="Unkown state '%s'" % state)

        # Execute commands

        for name, command, args in commands:

            try:

                api_command(ansible_module, command, to_text(name), args)

                changed = True

            except Exception as e:

                ansible_module.fail_json(msg="%s: %s: %s" % (command, name,

                                                             str(e)))

    except Exception as e:

        ansible_module.fail_json(msg=str(e))

    finally:

        temp_kdestroy(ccache_dir, ccache_name)

    # Done

    ansible_module.exit_json(changed=changed, **exit_args)

if __name__ == "__main__":

    main()