---
- name: Create mihomo LXC on mini-pc
  hosts: mini-pc
  gather_facts: false
  vars:
    # После переезда на OpenTofu (tofu/svc-mihomo.tf, VMID 159) этот play —
    # legacy: он таргетит СТАРЫЙ VMID 143 и его handler сделал бы pct start 143,
    # подняв остановленный откат на боевом адресе. Пропускаем, пока реестр
    # говорит provisioner: tofu. Для намеренного legacy rollback:
    #   -e pve_mihomo_legacy_provisioning_enabled=true
    pve_mihomo_legacy_provisioning_enabled: >-
      {{ homelab_services['mihomo'].provisioner != 'tofu' }}
    mihomo_vmid: 143
    mihomo_hostname: mihomo
    mihomo_ip: 192.168.1.27/24
    mihomo_gateway: 192.168.1.1
    mihomo_bridge: vmbr0
    mihomo_rootfs: local-lvm:8
    mihomo_ostemplate: local:vztmpl/debian-13-standard_13.1-2_amd64.tar.zst
    mihomo_pubkey_file: ~/.ssh/id_ed25519_homelab.pub
  handlers:
    - name: restart mihomo lxc
      ansible.builtin.shell: "pct stop {{ mihomo_vmid }} || true; pct start {{ mihomo_vmid }}"
      changed_when: true
  pre_tasks:
    - name: Skip legacy mihomo provisioning after cutover
      ansible.builtin.meta: end_play
      when: not (pve_mihomo_legacy_provisioning_enabled | bool)
  tasks:
    - name: Check if mihomo LXC exists
      ansible.builtin.command: "pct config {{ mihomo_vmid }}"
      register: mihomo_pct_config
      changed_when: false
      failed_when: false

    - name: Refuse to modify a foreign VMID 143
      ansible.builtin.assert:
        that:
          - mihomo_pct_config.rc != 0 or mihomo_existing_hostname == mihomo_hostname
        fail_msg: VMID 143 already exists and is not the Mihomo container.
      vars:
        mihomo_existing_hostname: >-
          {{ mihomo_pct_config.stdout_lines
             | select('match', '^hostname: ')
             | map('regex_replace', '^hostname: ', '')
             | first
             | default('') }}

    - name: Install mihomo LXC SSH public key on PVE host
      ansible.builtin.copy:
        dest: /tmp/mihomo-lxc.pub
        owner: root
        group: root
        mode: "0600"
        content: "{{ lookup('file', mihomo_pubkey_file) }}\n"
      when: mihomo_pct_config.rc != 0

    - name: Create mihomo LXC
      ansible.builtin.command: >-
        pct create {{ mihomo_vmid }} {{ mihomo_ostemplate }}
        --hostname {{ mihomo_hostname }}
        --rootfs {{ mihomo_rootfs }}
        --cores 1
        --memory 512
        --swap 512
        --net0 name=eth0,bridge={{ mihomo_bridge }},gw={{ mihomo_gateway }},ip={{ mihomo_ip }},firewall=1
        --nameserver 1.1.1.1
        --unprivileged 1
        --features nesting=1,keyctl=1
        --onboot 1
        --startup order=70
        --cmode shell
        --ssh-public-keys /tmp/mihomo-lxc.pub
      when: mihomo_pct_config.rc != 0

    - name: Start mihomo LXC
      ansible.builtin.command: "pct start {{ mihomo_vmid }}"
      register: mihomo_pct_start
      changed_when: mihomo_pct_start.rc == 0
      failed_when: mihomo_pct_start.rc not in [0, 255]

    - name: Allow FUSE device in mihomo LXC config
      ansible.builtin.lineinfile:
        path: "/etc/pve/lxc/{{ mihomo_vmid }}.conf"
        line: "lxc.cgroup2.devices.allow: c 10:229 rwm"
        state: present
      notify: restart mihomo lxc

    - name: Bind mount FUSE device in mihomo LXC config
      ansible.builtin.lineinfile:
        path: "/etc/pve/lxc/{{ mihomo_vmid }}.conf"
        line: "lxc.mount.entry: /dev/fuse dev/fuse none bind,create=file"
        state: present
      notify: restart mihomo lxc

    - name: Allow TUN device in mihomo LXC config
      ansible.builtin.lineinfile:
        path: "/etc/pve/lxc/{{ mihomo_vmid }}.conf"
        line: "lxc.cgroup2.devices.allow: c 10:200 rwm"
        state: present
      notify: restart mihomo lxc

    - name: Bind mount TUN device in mihomo LXC config
      ansible.builtin.lineinfile:
        path: "/etc/pve/lxc/{{ mihomo_vmid }}.conf"
        line: "lxc.mount.entry: /dev/net/tun dev/net/tun none bind,create=file"
        state: present
      notify: restart mihomo lxc

    - name: Apply pending LXC config changes
      ansible.builtin.meta: flush_handlers

    - name: Wait for mihomo SSH through ru-vps
      ansible.builtin.wait_for_connection:
        timeout: 120
      delegate_to: mihomo
      vars:
        ansible_become: false

- name: Prepare mihomo runtime host
  # Таргет переопределяем ради blue-green переезда на OpenTofu: во время
  # миграции этот play нужно прогнать против нового контейнера на временном
  # адресе. Просто `--limit mihomo-new` для этого НЕ годится — лимит
  # пересекается с паттерном play и даёт ноль хостов, а не перенацеливание
  # (проверено 2026-09-02 через --list-hosts на всех плейбуках).
  # Использовать вместе с --limit, чтобы play создания контейнера отсеялся:
  #   ansible-playbook playbooks/pve-mihomo.yml \
  #     -e pve_config_target=mihomo-new --limit mihomo-new
  # По умолчанию поведение не меняется.
  hosts: "{{ pve_config_target | default('mihomo') }}"
  gather_facts: true
  vars:
    ansible_become: false
    mihomo_config_dir: /opt/mihomo/config
    mihomo_ui_dir: /opt/mihomo/ui
    mihomo_image: metacubex/mihomo:v1.19.29@sha256:5e7bcc5e7a866afcc8b007ef827c9ba773f2f34b6d7311b6d39ed1751f37cfd5
    mihomo_ui_image: ghcr.io/metacubex/metacubexd:v1.270.6@sha256:156d55be885d4ba6254d840bd781b715c20c00afee6e6c24c76be4cfe5eb89d4
    mihomo_container_name: mihomo
    mihomo_ui_container_name: mihomo-ui
  tasks:
    - name: Install Docker and mihomo runtime packages
      ansible.builtin.apt:
        name:
          - docker.io
          - fuse-overlayfs
          - ca-certificates
          - curl
          - git
        state: present
        update_cache: true

    - name: Ensure Docker config directory exists
      ansible.builtin.file:
        path: /etc/docker
        state: directory
        owner: root
        group: root
        mode: "0755"

    - name: Configure Docker storage driver for unprivileged LXC
      ansible.builtin.copy:
        dest: /etc/docker/daemon.json
        owner: root
        group: root
        mode: "0644"
        content: |
          {
            "storage-driver": "fuse-overlayfs"
          }
      register: docker_daemon_config

    - name: Ensure Docker service is enabled and running
      ansible.builtin.systemd:
        name: docker
        state: "{{ 'restarted' if docker_daemon_config.changed else 'started' }}"
        enabled: true

    - name: Ensure mihomo directories exist
      ansible.builtin.file:
        path: "{{ item }}"
        state: directory
        owner: root
        group: root
        mode: "0750"
      loop:
        - /opt/mihomo
        - "{{ mihomo_config_dir }}"
        - "{{ mihomo_ui_dir }}"

    - name: Check if the configured Mihomo image is present
      ansible.builtin.command: "docker image inspect {{ mihomo_image }}"
      register: mihomo_image_inspect
      changed_when: false
      failed_when: false

    - name: Pull the configured Mihomo image
      ansible.builtin.command: "docker pull {{ mihomo_image }}"
      when: mihomo_image_inspect.rc != 0
      register: mihomo_image_pull
      changed_when: true

    - name: Check if the configured Mihomo UI image is present
      ansible.builtin.command: "docker image inspect {{ mihomo_ui_image }}"
      register: mihomo_ui_image_inspect
      changed_when: false
      failed_when: false

    - name: Pull the configured Mihomo UI image
      ansible.builtin.command: "docker pull {{ mihomo_ui_image }}"
      when: mihomo_ui_image_inspect.rc != 0
      register: mihomo_ui_image_pull
      changed_when: true

    - name: Install default mihomo config if missing
      ansible.builtin.copy:
        dest: "{{ mihomo_config_dir }}/config.yaml"
        owner: root
        group: root
        mode: "0640"
        force: false
        content: |
          mixed-port: 7890
          socks-port: 7891
          allow-lan: true
          bind-address: 0.0.0.0
          mode: rule
          log-level: info
          external-controller: 0.0.0.0:9090

          dns:
            enable: true
            listen: 0.0.0.0:1053
            enhanced-mode: fake-ip
            nameserver:
              - 1.1.1.1
              - 8.8.8.8

          proxies: []
          proxy-groups:
            - name: PROXY
              type: select
              proxies:
                - DIRECT

          rules:
            - MATCH,DIRECT
      register: mihomo_config

    - name: Install mihomo systemd unit
      ansible.builtin.copy:
        dest: /etc/systemd/system/mihomo.service
        owner: root
        group: root
        mode: "0644"
        content: |
          [Unit]
          Description=Mihomo proxy container
          After=docker.service
          Requires=docker.service

          [Service]
          Restart=always
          RestartSec=10
          ExecStartPre=-/usr/bin/docker rm -f {{ mihomo_container_name }}
          ExecStart=/usr/bin/docker run --rm \
            --name {{ mihomo_container_name }} \
            --pull never \
            --cap-add NET_ADMIN \
            --device /dev/net/tun \
            -p 7890:7890 \
            -p 7891:7891 \
            -p 9090:9090 \
            -v {{ mihomo_config_dir }}:/root/.config/mihomo \
            {{ mihomo_image }}
          ExecStop=/usr/bin/docker stop {{ mihomo_container_name }}

          [Install]
          WantedBy=multi-user.target
      register: mihomo_unit

    - name: Install mihomo UI systemd unit
      ansible.builtin.copy:
        dest: /etc/systemd/system/mihomo-ui.service
        owner: root
        group: root
        mode: "0644"
        content: |
          [Unit]
          Description=Mihomo MetaCubeXD web UI container
          After=docker.service mihomo.service
          Requires=docker.service

          [Service]
          Restart=always
          RestartSec=10
          ExecStartPre=-/usr/bin/docker rm -f {{ mihomo_ui_container_name }}
          ExecStart=/usr/bin/docker run --rm \
            --name {{ mihomo_ui_container_name }} \
            --pull never \
            -p 8080:80 \
            {{ mihomo_ui_image }}
          ExecStop=/usr/bin/docker stop {{ mihomo_ui_container_name }}

          [Install]
          WantedBy=multi-user.target
      register: mihomo_ui_unit

    - name: Reload systemd when mihomo units change
      ansible.builtin.systemd:
        daemon_reload: true
      when: mihomo_unit.changed or mihomo_ui_unit.changed

    - name: Enable and start mihomo
      ansible.builtin.systemd:
        name: mihomo
        enabled: true
        state: "{{ 'restarted' if mihomo_config.changed or mihomo_unit.changed or mihomo_image_pull is changed else 'started' }}"

    - name: Enable and start mihomo UI
      ansible.builtin.systemd:
        name: mihomo-ui
        enabled: true
        state: "{{ 'restarted' if mihomo_ui_unit.changed or mihomo_ui_image_pull is changed else 'started' }}"

    - name: Wait for Mihomo proxy TCP ports
      ansible.builtin.wait_for:
        host: 127.0.0.1
        port: "{{ item }}"
        state: started
        timeout: 120
      loop:
        - 7890
        - 7891
        - 9090

    - name: Check Mihomo UI endpoint
      ansible.builtin.uri:
        url: http://127.0.0.1:8080/
        status_code: 200
      register: mihomo_ui_health
      retries: 24
      delay: 5
      until: mihomo_ui_health.status == 200

    - name: Check Mihomo controller /version endpoint
      ansible.builtin.uri:
        url: http://127.0.0.1:9090/version
        status_code: 200
      register: mihomo_controller_health
      retries: 24
      delay: 5
      until: mihomo_controller_health.status == 200