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

# Copyright (c) 2021, Raphaël Droz (raphael.droz@gmail.com)
# Copyright (c) 2019, Guillaume Martinez (lunik@tiwabbit.fr)
# Copyright (c) 2018, Samy Coenen <samy.coenen@nubera.be>
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later

from __future__ import absolute_import, division, print_function
__metaclass__ = type

DOCUMENTATION = '''
---
module: gitlab_runner
short_description: Create, modify and delete GitLab Runners
description:
  - Register, update and delete runners with the GitLab API.
  - All operations are performed using the GitLab API v4.
  - For details, consult the full API documentation at U(https://docs.gitlab.com/ee/api/runners.html).
  - A valid private API token is required for all operations. You can create as many tokens as you like using the GitLab web interface at
    U(https://$GITLAB_URL/profile/personal_access_tokens).
  - A valid registration token is required for registering a new runner.
    To create shared runners, you need to ask your administrator to give you this token.
    It can be found at U(https://$GITLAB_URL/admin/runners/).
notes:
  - To create a new runner at least the C(api_token), C(description) and C(api_url) options are required.
  - Runners need to have unique descriptions.
author:
  - Samy Coenen (@SamyCoenen)
  - Guillaume Martinez (@Lunik)
requirements:
  - python >= 2.7
  - python-gitlab >= 1.5.0
extends_documentation_fragment:
  - community.general.auth_basic
  - community.general.gitlab
  - community.general.attributes

attributes:
  check_mode:
    support: full
  diff_mode:
    support: none

options:
  project:
    description:
      - ID or full path of the project in the form of group/name.
      - Mutually exclusive with I(owned) since community.general 4.5.0.
    type: str
    version_added: '3.7.0'
  description:
    description:
      - The unique name of the runner.
    required: true
    type: str
    aliases:
      - name
  state:
    description:
      - Make sure that the runner with the same name exists with the same configuration or delete the runner with the same name.
    required: false
    default: present
    choices: ["present", "absent"]
    type: str
  registration_token:
    description:
      - The registration token is used to register new runners.
      - Required if I(state) is C(present).
    type: str
  owned:
    description:
      - Searches only runners available to the user when searching for existing, when false admin token required.
      - Mutually exclusive with I(project) since community.general 4.5.0.
    default: false
    type: bool
    version_added: 2.0.0
  active:
    description:
      - Define if the runners is immediately active after creation.
    required: false
    default: true
    type: bool
  locked:
    description:
      - Determines if the runner is locked or not.
    required: false
    default: false
    type: bool
  access_level:
    description:
      - Determines if a runner can pick up jobs only from protected branches.
      - If I(access_level_on_creation) is not explicitly set to C(true), this option is ignored on registration and
        is only applied on updates.
      - If set to C(not_protected), runner can pick up jobs from both protected and unprotected branches.
      - If set to C(ref_protected), runner can pick up jobs only from protected branches.
      - The current default is C(ref_protected). This will change to no default in community.general 8.0.0.
        From that version on, if this option is not specified explicitly, GitLab will use C(not_protected)
        on creation, and the value set will not be changed on any updates.
    required: false
    choices: ["not_protected", "ref_protected"]
    type: str
  access_level_on_creation:
    description:
      - Whether the runner should be registered with an access level or not.
      - If set to C(true), the value of I(access_level) is used for runner registration.
      - If set to C(false), GitLab registers the runner with the default access level.
      - The current default of this option is C(false). This default is deprecated and will change to C(true) in commuinty.general 7.0.0.
    required: false
    type: bool
    version_added: 6.3.0
  maximum_timeout:
    description:
      - The maximum time that a runner has to complete a specific job.
    required: false
    default: 3600
    type: int
  run_untagged:
    description:
      - Run untagged jobs or not.
    required: false
    default: true
    type: bool
  tag_list:
    description: The tags that apply to the runner.
    required: false
    default: []
    type: list
    elements: str
'''

EXAMPLES = '''
- name: "Register runner"
  community.general.gitlab_runner:
    api_url: https://gitlab.example.com/
    api_token: "{{ access_token }}"
    registration_token: 4gfdsg345
    description: Docker Machine t1
    state: present
    active: true
    tag_list: ['docker']
    run_untagged: false
    locked: false

- name: "Delete runner"
  community.general.gitlab_runner:
    api_url: https://gitlab.example.com/
    api_token: "{{ access_token }}"
    description: Docker Machine t1
    state: absent

- name: Delete an owned runner as a non-admin
  community.general.gitlab_runner:
    api_url: https://gitlab.example.com/
    api_token: "{{ access_token }}"
    description: Docker Machine t1
    owned: true
    state: absent

- name: Register runner for a specific project
  community.general.gitlab_runner:
    api_url: https://gitlab.example.com/
    api_token: "{{ access_token }}"
    registration_token: 4gfdsg345
    description: MyProject runner
    state: present
    project: mygroup/mysubgroup/myproject
'''

RETURN = '''
msg:
  description: Success or failure message
  returned: always
  type: str
  sample: "Success"

result:
  description: json parsed response from the server
  returned: always
  type: dict

error:
  description: the error message returned by the GitLab API
  returned: failed
  type: str
  sample: "400: path is already in use"

runner:
  description: API object
  returned: always
  type: dict
'''

from ansible.module_utils.api import basic_auth_argument_spec
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.common.text.converters import to_native

from ansible_collections.community.general.plugins.module_utils.gitlab import (
    auth_argument_spec, gitlab_authentication, gitlab, ensure_gitlab_package
)


try:
    cmp  # pylint: disable=used-before-assignment
except NameError:
    def cmp(a, b):
        return (a > b) - (a < b)


class GitLabRunner(object):
    def __init__(self, module, gitlab_instance, project=None):
        self._module = module
        self._gitlab = gitlab_instance
        # Whether to operate on GitLab-instance-wide or project-wide runners
        # See https://gitlab.com/gitlab-org/gitlab-ce/issues/60774
        # for group runner token access
        if project:
            self._runners_endpoint = project.runners.list
        elif module.params['owned']:
            self._runners_endpoint = gitlab_instance.runners.list
        else:
            self._runners_endpoint = gitlab_instance.runners.all

        self.runner_object = None

    def create_or_update_runner(self, description, options):
        changed = False

        arguments = {
            'active': options['active'],
            'locked': options['locked'],
            'run_untagged': options['run_untagged'],
            'maximum_timeout': options['maximum_timeout'],
            'tag_list': options['tag_list'],
        }
        if arguments['access_level'] is not None:
            arguments['access_level'] = options['access_level']

        # Because we have already call userExists in main()
        if self.runner_object is None:
            arguments['description'] = description
            arguments['token'] = options['registration_token']

            access_level_on_creation = self._module.params['access_level_on_creation']
            if access_level_on_creation is None:
                message = "The option 'access_level_on_creation' is unspecified, so 'false' is assumed. "\
                          "That means any value of 'access_level' is ignored and GitLab registers the runner with its default value. "\
                          "The option 'access_level_on_creation' will switch to 'true' in community.general 7.0.0"
                self._module.deprecate(message, version='7.0.0', collection_name='community.general')
                access_level_on_creation = False

            if not access_level_on_creation:
                del arguments['access_level']

            runner = self.create_runner(arguments)
            changed = True
        else:
            changed, runner = self.update_runner(self.runner_object, arguments)

        self.runner_object = runner
        if changed:
            if self._module.check_mode:
                self._module.exit_json(changed=True, msg="Successfully created or updated the runner %s" % description)

            try:
                runner.save()
            except Exception as e:
                self._module.fail_json(msg="Failed to update runner: %s " % to_native(e))
            return True
        else:
            return False

    '''
    @param arguments Attributes of the runner
    '''
    def create_runner(self, arguments):
        if self._module.check_mode:
            return True

        try:
            runner = self._gitlab.runners.create(arguments)
        except (gitlab.exceptions.GitlabCreateError) as e:
            self._module.fail_json(msg="Failed to create runner: %s " % to_native(e))

        return runner

    '''
    @param runner Runner object
    @param arguments Attributes of the runner
    '''
    def update_runner(self, runner, arguments):
        changed = False

        for arg_key, arg_value in arguments.items():
            if arguments[arg_key] is not None:
                if isinstance(arguments[arg_key], list):
                    list1 = getattr(runner, arg_key)
                    list1.sort()
                    list2 = arguments[arg_key]
                    list2.sort()
                    if cmp(list1, list2):
                        setattr(runner, arg_key, arguments[arg_key])
                        changed = True
                else:
                    if getattr(runner, arg_key) != arguments[arg_key]:
                        setattr(runner, arg_key, arguments[arg_key])
                        changed = True

        return (changed, runner)

    '''
    @param description Description of the runner
    '''
    def find_runner(self, description):
        runners = self._runners_endpoint(as_list=False)

        for runner in runners:
            # python-gitlab 2.2 through at least 2.5 returns a list of dicts for list() instead of a Runner
            # object, so we need to handle both
            if hasattr(runner, "description"):
                if (runner.description == description):
                    return self._gitlab.runners.get(runner.id)
            else:
                if (runner['description'] == description):
                    return self._gitlab.runners.get(runner['id'])

    '''
    @param description Description of the runner
    '''
    def exists_runner(self, description):
        # When runner exists, object will be stored in self.runner_object.
        runner = self.find_runner(description)

        if runner:
            self.runner_object = runner
            return True
        return False

    def delete_runner(self):
        if self._module.check_mode:
            return True

        runner = self.runner_object

        return runner.delete()


def main():
    argument_spec = basic_auth_argument_spec()
    argument_spec.update(auth_argument_spec())
    argument_spec.update(dict(
        description=dict(type='str', required=True, aliases=["name"]),
        active=dict(type='bool', default=True),
        owned=dict(type='bool', default=False),
        tag_list=dict(type='list', elements='str', default=[]),
        run_untagged=dict(type='bool', default=True),
        locked=dict(type='bool', default=False),
        access_level=dict(type='str', choices=["not_protected", "ref_protected"]),
        access_level_on_creation=dict(type='bool'),
        maximum_timeout=dict(type='int', default=3600),
        registration_token=dict(type='str', no_log=True),
        project=dict(type='str'),
        state=dict(type='str', default="present", choices=["absent", "present"]),
    ))

    module = AnsibleModule(
        argument_spec=argument_spec,
        mutually_exclusive=[
            ['api_username', 'api_token'],
            ['api_username', 'api_oauth_token'],
            ['api_username', 'api_job_token'],
            ['api_token', 'api_oauth_token'],
            ['api_token', 'api_job_token'],
            ['project', 'owned'],
        ],
        required_together=[
            ['api_username', 'api_password'],
        ],
        required_one_of=[
            ['api_username', 'api_token', 'api_oauth_token', 'api_job_token'],
        ],
        required_if=[
            ('state', 'present', ['registration_token']),
        ],
        supports_check_mode=True,
    )
    ensure_gitlab_package(module)

    state = module.params['state']
    runner_description = module.params['description']
    runner_active = module.params['active']
    tag_list = module.params['tag_list']
    run_untagged = module.params['run_untagged']
    runner_locked = module.params['locked']
    access_level = module.params['access_level']
    maximum_timeout = module.params['maximum_timeout']
    registration_token = module.params['registration_token']
    project = module.params['project']

    if access_level is None:
        message = "The option 'access_level' is unspecified, so 'ref_protected' is assumed. "\
                  "In order to align the module with GitLab's runner API, this option will lose "\
                  "its default value in community.general 8.0.0. From that version on, you must set "\
                  "this option to 'ref_protected' explicitly, if you want to have a protected runner, "\
                  "otherwise GitLab's default access level gets applied, which is 'not_protected'"
        module.deprecate(message, version='8.0.0', collection_name='community.general')
        access_level = 'ref_protected'

    gitlab_instance = gitlab_authentication(module)
    gitlab_project = None
    if project:
        try:
            gitlab_project = gitlab_instance.projects.get(project)
        except gitlab.exceptions.GitlabGetError as e:
            module.fail_json(msg='No such a project %s' % project, exception=to_native(e))

    gitlab_runner = GitLabRunner(module, gitlab_instance, gitlab_project)
    runner_exists = gitlab_runner.exists_runner(runner_description)

    if state == 'absent':
        if runner_exists:
            gitlab_runner.delete_runner()
            module.exit_json(changed=True, msg="Successfully deleted runner %s" % runner_description)
        else:
            module.exit_json(changed=False, msg="Runner deleted or does not exists")

    if state == 'present':
        if gitlab_runner.create_or_update_runner(runner_description, {
            "active": runner_active,
            "tag_list": tag_list,
            "run_untagged": run_untagged,
            "locked": runner_locked,
            "access_level": access_level,
            "maximum_timeout": maximum_timeout,
            "registration_token": registration_token,
        }):
            module.exit_json(changed=True, runner=gitlab_runner.runner_object._attrs,
                             msg="Successfully created or updated the runner %s" % runner_description)
        else:
            module.exit_json(changed=False, runner=gitlab_runner.runner_object._attrs,
                             msg="No need to update the runner %s" % runner_description)


if __name__ == '__main__':
    main()