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

# (c) 2020, 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_directory
version_added: '1.5.0'
short_description: Manage FlashArray File System Directories
description:
- Create/Delete FlashArray File Systems
author:
- Pure Storage Ansible Team (@sdodsley) <pure-ansible-team@purestorage.com>
options:
  name:
    description:
    - Name of the directory
    type: str
    required: true
  state:
    description:
    - Define whether the directory should exist or not.
    default: present
    choices: [ absent, present ]
    type: str
  filesystem:
    description:
    - Name of the filesystem the directory links to.
    type: str
    required: true
  path:
    description:
    - Path of the managed directory in the file system
    - If not provided will default to I(name)
    type: str
  rename:
    description:
    - Value to rename the specified directory to
    type: str
extends_documentation_fragment:
- purestorage.flasharray.purestorage.fa
'''

EXAMPLES = r'''
- name: Create direcotry foo in filesysten bar with path zeta
  purefa_directory:
    name: foo
    filesystem: bar
    path: zeta
    fa_url: 10.10.10.2
    api_token: e31060a7-21fc-e277-6240-25983c6c4592

- name: Rename directory foo to fin in filesystem bar
  purefa_directory:
    name: foo
    rename: fin
    filesystem: bar
    fa_url: 10.10.10.2
    api_token: e31060a7-21fc-e277-6240-25983c6c4592

- name: Delete diectory foo in filesystem bar
  purefa_directory:
    name: foo
    filesystem: bar
    state: absent
    fa_url: 10.10.10.2
    api_token: e31060a7-21fc-e277-6240-25983c6c4592
'''

RETURN = r'''
'''

HAS_PURESTORAGE = True
try:
    from pypureclient import flasharray
except ImportError:
    HAS_PURESTORAGE = False

from ansible.module_utils.basic import AnsibleModule
from ansible_collections.purestorage.flasharray.plugins.module_utils.purefa import get_system, get_array, purefa_argument_spec

MIN_REQUIRED_API_VERSION = '2.2'


def delete_dir(module, array):
    """Delete a file system"""
    changed = True
    if not module.check_mode:
        res = array.delete_directories(names=[module.params['filesystem'] + ":" + module.params['name']])
        if res.status_code != 200:
            module.fail_json(msg="Failed to delete file system {0}. {1}".format(module.params['name'],
                                                                                res.errors[0].message))
    module.exit_json(changed=changed)


def rename_dir(module, array):
    """Recover a file system"""
    changed = True
    if not module.check_mode:
        changed = False
        target = array.get_directories(names=[module.params['filesystem'] + ":" + module.params['rename']])
        if target.status_code != 200:
            directory = flasharray.DirectoryPatch(name=module.params['filesystem'] + ":" + module.params['rename'])
            res = array.patch_directories(names=[module.params['filesystem'] + ":" + module.params['name']],
                                          directory=directory)
            if res.status_code != 200:
                module.fail_json(msg="Failed to delete file system {0}".format(module.params['name']))
            else:
                changed = True
        else:
            module.fail_json(msg="Target file system {0} already exists".format(module.params['rename']))
    module.exit_json(changed=changed)


def create_dir(module, array):
    """Create a file system directory"""
    changed = True
    if not module.check_mode:
        changed = False
        if not module.params['path']:
            module.params['path'] = module.params['name']
        all_fs = list(array.get_directories(file_system_names=[module.params['filesystem']]).items)
        for check in range(0, len(all_fs)):
            if module.params['path'] == all_fs[check].path[1:]:
                module.fail_json(msg="Path {0} already existis in file system {1}".format(module.params['path'],
                                                                                          module.params['filesystem']))
        directory = flasharray.DirectoryPost(directory_name=module.params['name'],
                                             path=module.params['path'])
        res = array.post_directories(file_system_names=[module.params['filesystem']], directory=directory)
        if res.status_code != 200:
            module.fail_json(msg="Failed to create file system {0}. {1}".format(module.params['name'],
                                                                                res.errors[0].message))
        else:
            changed = True
    module.exit_json(changed=changed)


def main():
    argument_spec = purefa_argument_spec()
    argument_spec.update(dict(
        state=dict(type='str', default='present', choices=['absent', 'present']),
        filesystem=dict(type='str', required=True),
        name=dict(type='str', required=True),
        rename=dict(type='str'),
        path=dict(type='str'),
    ))

    module = AnsibleModule(argument_spec,
                           supports_check_mode=True)

    if not HAS_PURESTORAGE:
        module.fail_json(msg='py-pure-client sdk is required for this module')

    array = get_system(module)
    api_version = array._list_available_rest_versions()
    if MIN_REQUIRED_API_VERSION not in api_version:
        module.fail_json(msg='FlashArray REST version not supported. '
                             'Minimum version required: {0}'.format(MIN_REQUIRED_API_VERSION))
    array = get_array(module)
    state = module.params['state']

    try:
        filesystem = list(array.get_file_systems(names=[module.params['filesystem']]).items)[0]
    except Exception:
        module.fail_json(msg="Selected file system {0} does not exist".format(module.params['filesystem']))
    res = array.get_directories(names=[module.params['filesystem'] + ":" + module.params['name']])
    exists = bool(res.status_code == 200)

    if state == 'present' and not exists:
        create_dir(module, array)
    elif state == "present" and exists and module.params['rename'] and not filesystem.destroyed:
        rename_dir(module, array)
    elif state == 'absent' and exists:
        delete_dir(module, array)

    module.exit_json(changed=False)


if __name__ == '__main__':
    main()
