---
# ============================================================================
# preflight-homarr.yml — reachability pre-flight for Homarr (NO host changes)
# ============================================================================
# Read-only gate. Confirms, in order:
#   1. Infisical auth + deploy SSH key retrievable (runner).
#   2. Target host reachable over SSH as the `ansible` user.
#   3. Rootless docker is usable (docker version).
#   4. The `homarr` container exists and is running.
#   5. Homarr answers HTTP on its port.
# Fails with a clear reason at the first broken link. Changes nothing on the host.
#
# Run this before update-homarr-checked.yml, or any time to confirm Homarr health.
#
# Connects AS the `ansible` user via the Infisical-injected deploy key (same
# pattern as deploy-homarr.yml / update-homarr.yml).
#
# Usage: playbook playbooks/preflight-homarr.yml, extra vars: target=racknerd1
# ============================================================================

- name: "PRECHECK — fetch deploy SSH key from Infisical"
  hosts: localhost
  gather_facts: false
  vars:
    infisical_url: "{{ lookup('env','INFISICAL_URL') | default('http://192.168.122.41:8080', true) }}"
    infisical_env_slug: "{{ lookup('env','INFISICAL_ENV_SLUG') | default('dev', true) }}"
  tasks:
    - name: "[precheck] Infisical auth vars present?"
      ansible.builtin.assert:
        that:
          - lookup('env','INFISICAL_CLIENT_ID') | length > 0
          - lookup('env','INFISICAL_CLIENT_SECRET') | length > 0
          - lookup('env','INFISICAL_PROJECT_ID') | length > 0
        fail_msg: "Missing INFISICAL_CLIENT_ID / _SECRET / _PROJECT_ID in Semaphore Environment."

    - name: "[precheck] Login to Infisical"
      infisical.vault.login:
        url: "{{ infisical_url }}"
        auth_method: universal_auth
        universal_auth_client_id: "{{ lookup('env','INFISICAL_CLIENT_ID') }}"
        universal_auth_client_secret: "{{ lookup('env','INFISICAL_CLIENT_SECRET') }}"
      register: infisical_login

    - name: "[precheck] Read secrets"
      infisical.vault.read_secrets:
        login_data: "{{ infisical_login.login_data }}"
        project_id: "{{ lookup('env','INFISICAL_PROJECT_ID') }}"
        env_slug: "{{ infisical_env_slug }}"
        path: "/"
        as_dict: true
      register: infisical_secrets

    - name: "[precheck] stash SSH key for preflight play"
      ansible.builtin.set_fact:
        pc_ssh_privkey: "{{ infisical_secrets.secrets.SSH_PRIVATE_KEY }}"
      no_log: true

    - name: "[precheck] write deploy private key to runner temp (0600)"
      ansible.builtin.copy:
        dest: "/tmp/homarr_deploy_key"
        content: "{{ pc_ssh_privkey }}\n"
        mode: "0600"
      no_log: true

- name: "PRE-FLIGHT — reachability + Homarr health (read-only)"
  hosts: "{{ target | default('racknerd1') }}"
  gather_facts: false
  vars:
    deploy_user: ansible
    homarr_dir: "/home/{{ deploy_user }}/docker/homarr"
    homarr_port: 7575
    ansible_user: ansible
    ansible_ssh_private_key_file: "/tmp/homarr_deploy_key"
    ansible_ssh_common_args: "-o StrictHostKeyChecking=accept-new -o IdentitiesOnly=yes"
  tasks:
    - name: "[1/5] SSH reachable as ansible user?"
      ansible.builtin.ping:

    - name: Reset connection so docker group membership is active in this session
      ansible.builtin.meta: reset_connection

    - name: "[2/5] Rootless docker usable?"
      ansible.builtin.command: docker version
      register: dv
      changed_when: false
      failed_when: dv.rc != 0

    - name: "[3/5] Homarr container present + running?"
      ansible.builtin.command:
        cmd: docker inspect --format '{{ '{{' }}.State.Running{{ '}}' }}' homarr
      register: homarr_state
      changed_when: false
      failed_when: false

    - name: "Assert homarr container is running"
      ansible.builtin.assert:
        that:
          - homarr_state.rc == 0
          - homarr_state.stdout | trim == 'true'
        fail_msg: >-
          Homarr container is not running on {{ inventory_hostname }}
          (docker inspect rc={{ homarr_state.rc }}, state='{{ homarr_state.stdout | trim }}').
          Run deploy-homarr.yml.

    - name: "[4/5] Compose stack file present?"
      ansible.builtin.stat:
        path: "{{ homarr_dir }}/docker-compose.yml"
      register: compose_file

    - name: "Warn if compose file missing (container running without repo compose)"
      ansible.builtin.debug:
        msg: >-
          NOTE: no docker-compose.yml at {{ homarr_dir }} — container is running but
          update-homarr-checked.yml expects the compose stack. Deploy first if updating.
      when: not compose_file.stat.exists

    - name: "[5/5] Homarr answers HTTP?"
      ansible.builtin.uri:
        url: "http://127.0.0.1:{{ homarr_port }}/"
        status_code: [200, 302, 307]
      register: health
      retries: 6
      delay: 5
      until: health.status is defined and health.status in [200, 302, 307]

    - name: "PRE-FLIGHT PASSED"
      ansible.builtin.debug:
        msg: >-
          Homarr reachable on {{ inventory_hostname }}:{{ homarr_port }}
          (HTTP {{ health.status }}) — safe to update.

- name: "Cleanup runner temp key"
  hosts: localhost
  gather_facts: false
  tasks:
    - name: "remove temp deploy key from runner"
      ansible.builtin.file:
        path: /tmp/homarr_deploy_key
        state: absent