# SPDX-FileCopyrightText: 2021 Free Software Foundation Europe <https://fsfe.org>
#
# SPDX-License-Identifier: AGPL-3.0-or-later

---
- name: Get innernet-server hostname from inventory groups
  set_fact:
    # Assuming that we only have one innernet server, we take the first
    # occurence
    innernet_server: "{{ groups['innernet_server'][0] }}"
  run_once: true

- name: Convert hostname to innernet peer name
  tags: [peers]
  # we want the mere host name before the domain, so e.g.
  # * server1.fsfe.org -> server1
  # * cont1.noris.fsfeurope.org -> cont1-noris
  set_fact:
    innernet_client: "{{ innernet_client | replace(item.0, item.1) }}"
  vars:
    - innernet_client: "{{ ansible_host }}"
  loop:
    - ['.', '-']
    - ['-fsfeurope-org', '']
    - ['-fsfe-org', '']
    - ['-fsfe-be', '']

- name: Get existing peers from innernet-server database
  tags: [peers]
  shell: 'sqlite3 /var/lib/innernet-server/{{ network_name }}.db "select name from peers;"'
  register: existing_peers
  delegate_to: "{{ innernet_server }}"

- name: Gather which packages are installed on the client
  tags: [update]
  package_facts:
    manager: auto

- name: Make sure needed packages for innernet and wireguard are installed
  apt:
    package:
      - python3-pexpect
      - rsync
      - wireguard
      - wireguard-tools
      - ufw

- name: Remove existing innernet
  tags: [never, uninstall]
  expect:
    command: "innernet uninstall {{ network_name }}"
    responses:
      (?i)delete: "yes"

- name: Install innernet package on client
  tags: [update]
  block:
    - name: Copy innernet package to client
      synchronize:
        src: "innernet.deb"
        dest: "/tmp/innernet.deb"

    - name: Install innernet client package
      apt:
        deb: "/tmp/innernet.deb"
        update_cache: true
        install_recommends: true
  # If 1. innernet not installed or 2. `update` tag executed
  when: "'innernet' not in ansible_facts.packages or 'update' in ansible_run_tags"

- name: Make client a new innernet peer
  tags: [peers]
  block:
    - name: Add client as innernet peer
      shell: |
        innernet-server add-peer "{{ network_name }}" \
          --name "{{ innernet_client }}" \
          --cidr "{{ machine_cidr.name }}" \
          --admin "{{ machine_cidr.admin }}" \
          --save-config "/root/{{ innernet_client }}.toml" \
          --invite-expires "14d" \
          --auto-ip \
          --yes
      delegate_to: "{{ innernet_server }}"

    - name: Copy peer invitation file from server to controller
      fetch:
        src: "/root/{{ innernet_client }}.toml"
        dest: "{{ playbook_dir }}/roles/client/files/{{ innernet_client }}.toml"
        flat: yes
        fail_on_missing: yes
      delegate_to: "{{ innernet_server }}"

    - name: Copy peer invitation file from controller to client
      copy:
        src: "{{ innernet_client }}.toml"
        dest: "/root/{{ innernet_client }}.toml"

    - name: Install peer invitation on client
      shell: |
        innernet install /root/{{ innernet_client }}.toml \
          --default-name \
          --delete-invite

    - name: Delete peer invitation file from client
      file:
        state: absent
        path: "/root/{{ innernet_client }}.toml"

    - name: Delete peer invitation file from server
      file:
        state: absent
        path: "/root/{{ innernet_client }}.toml"
      delegate_to: "{{ innernet_server }}"
  when:
    - innernet_client not in existing_peers.stdout_lines

- name: Set listen port
  tags: [listen_port]
  ini_file:
    path: "/etc/innernet/{{ network_name }}.conf"
    section: interface
    option: listen-port
    value: "{{ network_listen_port }}"
    mode: 600
    backup: yes

- name: Allow UDP traffic on WireGuard port
  tags: [listen_port, firewall]
  ufw:
    to_port: "{{ network_listen_port }}"
    rule: allow
    proto: udp

- name: Restart and enable innernet daemon
  systemd:
    name: "innernet@{{ network_name }}"
    state: restarted
    enabled: yes
    daemon_reload: yes