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

# (c) 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: purefb_smtp
version_added: '1.0.0'
short_description: Configure SMTP for Pure Storage FlashBlade
description:
- Configure SMTP for a Pure Storage FlashBlade.
- Whilst there can be no relay host, a sender domain must be configured.
author:
- Pure Storage Ansible Team (@sdodsley) <pure-ansible-team@purestorage.com>
options:
  host:
    description:
    - Relay server name
    type: str
  domain:
    description:
    - Domain name for alert messages
    required: true
    type: str
  encryption:
    description:
    - Enforces an encryption mode when sending alert email messages.
    - Use "" to clear.
    type: str
    choices: [ "starttls", "" ]
    version_added: 1.19.0
extends_documentation_fragment:
- purestorage.flashblade.purestorage.fb
"""

EXAMPLES = r"""
- name: Configure SMTP settings
  purestorage.flashblade.purefb_smtp:
    host: hostname
    encryption: starttls
    domain: xyz.com
    fb_url: 10.10.10.2
    api_token: T-9f276a18-50ab-446e-8a0c-666a3529a1b6
"""

RETURN = r"""
"""

HAS_PYPURECLIENT = True
try:
    from pypureclient.flashblade import SmtpServer
except ImportError:
    HAS_PYPURECLIENT = False

from ansible.module_utils.basic import AnsibleModule
from ansible_collections.purestorage.flashblade.plugins.module_utils.purefb import (
    get_system,
    purefb_argument_spec,
)


SMTP_ENCRYPT_API_VERSION = "2.15"


def set_smtp(module, blade):
    """Configure SMTP settings"""
    changed = False
    current_smtp = list(blade.get_smtp_servers(names=["management"]).items)[0]
    relay_host = current_smtp.relay_host
    domain = current_smtp.sender_domain
    encrypt = getattr(current_smtp, "encryption_mode", "")
    if module.params["host"] and module.params["host"] != relay_host:
        relay_host = module.params["host"]
        changed = True
    if module.params["domain"] and module.params["domain"] != domain:
        domain = module.params["domain"]
        changed = True
    if (
        module.params["encryption"] is not None
        and module.params["encryption"] != encrypt
    ):
        encrypt = module.params["encryption"]
        changed = True
    if changed and not module.check_mode:
        if SMTP_ENCRYPT_API_VERSION in list(blade.get_versions().items):
            res = blade.patch_smtp_servers(
                smtp=SmtpServer(
                    relay_host=relay_host, sender_domain=domain, encryption_mode=encrypt
                )
            )
        else:
            res = blade.patch_smtp_servers(
                smtp=SmtpServer(relay_host=relay_host, sender_domain=domain)
            )
        if res.status_code != 200:
            module.fail_json(
                msg="Failed to set SMTP configuration. Error: {0}".format(
                    res.errors[0].message
                )
            )
    module.exit_json(changed=changed)


def main():
    argument_spec = purefb_argument_spec()
    argument_spec.update(
        dict(
            host=dict(type="str"),
            domain=dict(type="str", required=True),
            encryption=dict(type="str", choices=["starttls", ""]),
        )
    )

    module = AnsibleModule(argument_spec, supports_check_mode=True)

    blade = get_system(module)
    api_version = list(blade.get_versions().items)
    if not HAS_PYPURECLIENT:
        module.fail_json(msg="py-pure-client SDK is required for this module")
    if SMTP_ENCRYPT_API_VERSION not in api_version and module.params["encryption"]:
        module.fail_json(msg="Purity//FB must be upgraded to support encryption.")

    set_smtp(module, blade)
    module.exit_json(changed=False)


if __name__ == "__main__":
    main()