#!/usr/bin/python
#
# Copyright: Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function


__metaclass__ = type


DOCUMENTATION = """
module: asa_command
author: Peter Sprygada (@privateip), Patrick Ogenstad (@ogenstad)
short_description: Run arbitrary commands on Cisco ASA devices
description:
- Sends arbitrary commands to an ASA node and returns the results read from the device.
  The C(asa_command) module includes an argument that will cause the module to wait
  for a specific condition before returning or timing out if the condition is not
  met.
version_added: 1.0.0
extends_documentation_fragment:
- cisco.asa.asa
options:
  commands:
    description:
    - List of commands to send to the remote device over the configured provider.
      The resulting output from the command is returned. If the I(wait_for) argument
      is provided, the module is not returned until the condition is satisfied or
      the number of retires as expired.
    required: true
    type: list
    elements: str
  wait_for:
    description:
    - List of conditions to evaluate against the output of the command. The task will
      wait for each condition to be true before moving forward. If the conditional
      is not true within the configured number of retries, the task fails. See examples.
    aliases:
    - waitfor
    type: list
    elements: str
  match:
    description:
    - The I(match) argument is used in conjunction with the I(wait_for) argument to
      specify the match policy.  Valid values are C(all) or C(any).  If the value
      is set to C(all) then all conditionals in the wait_for must be satisfied.  If
      the value is set to C(any) then only one of the values must be satisfied.
    default: all
    choices:
    - any
    - all
    type: str
  retries:
    description:
    - Specifies the number of retries a command should by tried before it is considered
      failed. The command is run on the target device every retry and evaluated against
      the I(wait_for) conditions.
    default: 10
    type: int
  interval:
    description:
    - Configures the interval in seconds to wait between retries of the command. If
      the command does not pass the specified conditions, the interval indicates how
      long to wait before trying the command again.
    default: 1
    type: int
notes:
- When processing wait_for, each commands' output is stored as an element of the I(result)
  array.  The allowed operators for conditional evaluation are I(eq), I(==), I(neq),
  I(ne), I(!=), I(gt), I(>), I(ge), I(>=), I(lt), I(<), I(le), I(<=), I(contains),
  I(matches).  Operators can be prefaced by I(not) to negate their meaning.  The I(contains)
  operator searches for a substring match (like the Python I(in) operator).  The I(matches)
  operator searches using a regex search operation.
"""

EXAMPLES = """
- name: Show the ASA version
  cisco.asa.asa_command:
    commands:
    - show version

- name: Show ASA drops and memory
  cisco.asa.asa_command:
    commands:
    - show asp drop
    - show memory

- name: Send repeat pings and wait for the result to pass 100%
  cisco.asa.asa_command:
    commands:
    - ping 8.8.8.8 repeat 20 size 350
    wait_for:
    - result[0] contains 100
    retries: 2
"""

RETURN = """
stdout:
  description: the set of responses from the commands
  returned: always
  type: list
  sample: ['...', '...']

stdout_lines:
  description: The value of stdout split into a list
  returned: always
  type: list
  sample: [['...', '...'], ['...'], ['...']]

failed_conditions:
  description: the conditionals that failed
  returned: failed
  type: list
  sample: ['...', '...']
"""
import time

from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.six import string_types
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.parsing import (
    Conditional,
)

from ansible_collections.cisco.asa.plugins.module_utils.network.asa.asa import (
    asa_argument_spec,
    check_args,
    run_commands,
)


def to_lines(stdout):
    for item in stdout:
        if isinstance(item, string_types):
            item = str(item).split("\n")
        yield item


def main():
    spec = dict(
        # { command: <str>, prompt: <str>, response: <str> }
        commands=dict(type="list", required=True, elements="str"),
        wait_for=dict(type="list", aliases=["waitfor"], elements="str"),
        match=dict(default="all", choices=["all", "any"], type="str"),
        retries=dict(default=10, type="int"),
        interval=dict(default=1, type="int"),
    )

    spec.update(asa_argument_spec)

    module = AnsibleModule(argument_spec=spec, supports_check_mode=True)
    check_args(module)

    result = {"changed": False}

    wait_for = module.params["wait_for"] or list()
    conditionals = [Conditional(c) for c in wait_for]

    commands = module.params["commands"]
    retries = module.params["retries"]
    interval = module.params["interval"]
    match = module.params["match"]

    while retries > 0:
        responses = run_commands(module, commands)

        for item in list(conditionals):
            if item(responses):
                if match == "any":
                    conditionals = list()
                    break
                conditionals.remove(item)

        if not conditionals:
            break

        time.sleep(interval)
        retries -= 1

    if conditionals:
        failed_conditions = [item.raw for item in conditionals]
        msg = "One or more conditional statements have not be satisfied"
        module.fail_json(msg=msg, failed_conditions=failed_conditions)

    result.update(
        {
            "changed": False,
            "stdout": responses,
            "stdout_lines": list(to_lines(responses)),
        },
    )

    module.exit_json(**result)


if __name__ == "__main__":
    main()