#!/usr/bin/python
# -*- coding: utf-8 -*-

# 2018, Simon Dodsley (simon@purestorage.com)
# 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

ANSIBLE_METADATA = {
    "metadata_version": "1.1",
    "status": ["preview"],
    "supported_by": "community",
}

DOCUMENTATION = r"""
---
module: purefa_alert
version_added: '1.0.0'
short_description: Configure Pure Storage FlashArray alert email settings
description:
- Configure alert email configuration for Pure Storage FlashArrays.
author:
- Pure Storage Ansible Team (@sdodsley) <pure-ansible-team@purestorage.com>
options:
  state:
    type: str
    description:
    - Create or delete alert email
    default: present
    choices: [ absent, present ]
  address:
    type: str
    description:
    - Email address (valid format required)
    required: true
  enabled:
    type: bool
    default: true
    description:
    - Set specified email address to be enabled or disabled
extends_documentation_fragment:
- purestorage.flasharray.purestorage.fa
"""

EXAMPLES = r"""
- name: Add new email recipient and enable, or enable existing email
  purestorage.flasharray.purefa_alert:
    address: "user@domain.com"
    enabled: true
    state: present
    fa_url: 10.10.10.2
    api_token: e31060a7-21fc-e277-6240-25983c6c4592
- name: Delete existing email recipient
  purestorage.flasharray.purefa_alert:
    state: absent
    address: "user@domain.com"
    fa_url: 10.10.10.2
    api_token: e31060a7-21fc-e277-6240-25983c6c4592
"""

RETURN = r"""
"""

import re
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.purestorage.flasharray.plugins.module_utils.purefa import (
    get_system,
    purefa_argument_spec,
)


def create_alert(module, array):
    """Create Alert Email"""
    changed = True
    if not module.check_mode:
        changed = False
        try:
            array.create_alert_recipient(module.params["address"])
            changed = True
        except Exception:
            module.fail_json(
                msg="Failed to create alert email: {0}".format(module.params["address"])
            )

        if not module.params["enabled"]:
            try:
                array.disable_alert_recipient(module.params["address"])
                changed = True
            except Exception:
                module.fail_json(
                    msg="Failed to create alert email: {0}".format(
                        module.params["address"]
                    )
                )

    module.exit_json(changed=changed)


def enable_alert(module, array):
    """Enable Alert Email"""
    changed = True
    if not module.check_mode:
        changed = False
        try:
            array.enable_alert_recipient(module.params["address"])
            changed = True
        except Exception:
            module.fail_json(
                msg="Failed to enable alert email: {0}".format(module.params["address"])
            )

    module.exit_json(changed=changed)


def disable_alert(module, array):
    """Disable Alert Email"""
    changed = True
    if not module.check_mode:
        changed = False
        try:
            array.disable_alert_recipient(module.params["address"])
            changed = True
        except Exception:
            module.fail_json(
                msg="Failed to disable alert email: {0}".format(
                    module.params["address"]
                )
            )

    module.exit_json(changed=changed)


def delete_alert(module, array):
    """Delete Alert Email"""
    changed = True
    if module.params["address"] == "flasharray-alerts@purestorage.com":
        module.fail_json(
            msg="Built-in address {0} cannot be deleted.".format(
                module.params["address"]
            )
        )
    if not module.check_mode:
        changed = False
        try:
            array.delete_alert_recipient(module.params["address"])
            changed = True
        except Exception:
            module.fail_json(
                msg="Failed to delete alert email: {0}".format(module.params["address"])
            )

    module.exit_json(changed=changed)


def main():
    argument_spec = purefa_argument_spec()
    argument_spec.update(
        dict(
            address=dict(type="str", required=True),
            enabled=dict(type="bool", default=True),
            state=dict(type="str", default="present", choices=["absent", "present"]),
        )
    )

    module = AnsibleModule(argument_spec, supports_check_mode=True)

    pattern = re.compile(r"^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$")
    if not pattern.match(module.params["address"]):
        module.fail_json(msg="Valid email address not provided.")

    array = get_system(module)

    exists = False
    try:
        emails = array.list_alert_recipients()
    except Exception:
        module.fail_json(msg="Failed to get exisitng email list")
    for email in range(0, len(emails)):
        if emails[email]["name"] == module.params["address"]:
            exists = True
            enabled = emails[email]["enabled"]
            break
    if module.params["state"] == "present" and not exists:
        create_alert(module, array)
    elif (
        module.params["state"] == "present"
        and exists
        and not enabled
        and module.params["enabled"]
    ):
        enable_alert(module, array)
    elif (
        module.params["state"] == "present"
        and exists
        and enabled
        and not module.params["enabled"]
    ):
        disable_alert(module, array)
    elif module.params["state"] == "absent" and exists:
        delete_alert(module, array)

    module.exit_json(changed=False)


if __name__ == "__main__":
    main()