---
- name: Backup and/or Upgrade MikroTik
  hosts: mikrotik_routers
  gather_facts: false
  serial: 10

  vars:
    backup_dir: /opt/mikrotik_backups/
    checkmk_url: "http://checkmk-server/mysite/check_mk/api/1.0/domain-types/service/collections/all"
    checkmk_service_description: "MikroTik Backup/Upgrade"

  tasks:
    # ----------------------------
    # Always: identity + timestamp
    # ----------------------------
    - name: Get router identity
      community.routeros.command:
        commands:
          - /system identity print
      register: identity_raw
      tags: always

    - name: Parse router name
      ansible.builtin.set_fact:
        router_name: "{{ identity_raw.stdout[0].split(': ', 1)[1] | trim }}"
      tags: always

    - name: Get timestamp
      ansible.builtin.command: date +%Y-%m-%d_%H-%M-%S
      register: date_out
      delegate_to: localhost
      changed_when: false
      tags: always

    - name: Set timestamp fact
      ansible.builtin.set_fact:
        ts: "{{ date_out.stdout }}"
      tags: always

    # ----------------------------
    # Backup
    # ----------------------------
    - name: Ensure local backup directory exists
      ansible.builtin.file:
        path: "{{ backup_dir }}"
        state: directory
        mode: "0755"
      delegate_to: localhost
      tags: backup

    - name: Export router config
      community.routeros.command:
        commands:
          - /export terse show-sensitive
      register: export_cfg
      tags: backup

    - name: Save export locally
      ansible.builtin.copy:
        content: "{{ export_cfg.stdout[0] }}"
        dest: "{{ backup_dir }}/{{ router_name }}-{{ ts }}.rsc"
        mode: "0600"
      delegate_to: localhost
      tags: backup

    - name: Mark backup success
      ansible.builtin.set_fact:
        backup_ok: true
        backup_file: "{{ backup_dir }}/{{ router_name }}-{{ ts }}.rsc"
      tags: backup

    # ----------------------------
    # Upgrade
    # ----------------------------
    - name: Trigger update check
      community.routeros.command:
        commands:
          - /system package update check-for-updates once
      register: update_trigger
      tags: upgrade

    - name: Poll update status until ready
      community.routeros.command:
        commands:
          - /system package update print as-value
      register: update_info
      retries: 10
      delay: 3
      until: >
        update_info.stdout is defined and
        update_info.stdout | length > 0 and
        update_info.stdout[0] is mapping and
        update_info.stdout[0].get('status', '') != '' and
        'finding out latest version' not in (update_info.stdout[0].get('status', '') | lower)
      tags: upgrade

    - name: Debug update info
      ansible.builtin.debug:
        var: update_info.stdout[0]
      tags: upgrade

    - name: Parse versions
      ansible.builtin.set_fact:
        installed_version: "{{ update_info.stdout[0].get('installed-version', 'unknown') }}"
        latest_version: "{{ update_info.stdout[0].get('latest-version', 'unknown') }}"
        update_status: "{{ update_info.stdout[0].get('status', 'unknown') }}"
        update_channel: "{{ update_info.stdout[0].get('channel', 'unknown') }}"
      tags: upgrade

    - name: Detect update failure
      ansible.builtin.set_fact:
        update_failed: >-
          {{
            'error' in (update_status | lower) or
            'failed' in (update_status | lower)
          }}
      tags: upgrade

    - name: Set upgrade-needed fact
      ansible.builtin.set_fact:
        upgrade_needed: >-
          {{
            not update_failed and
            installed_version != 'unknown' and
            latest_version != 'unknown' and
            installed_version != latest_version
          }}
      tags: upgrade

    - name: Show decision
      ansible.builtin.debug:
        msg: >-
          Router={{ router_name }}
          channel={{ update_channel }}
          installed={{ installed_version }}
          latest={{ latest_version }}
          status={{ update_status }}
          upgrade_needed={{ upgrade_needed }}
      tags: upgrade

    - name: Warn if update check failed
      ansible.builtin.debug:
        msg: "WARNING: Update check failed on {{ router_name }} (status={{ update_status }})"
      when: update_failed
      tags: upgrade

    - name: Skip upgrade if already latest
      ansible.builtin.debug:
        msg: "Router {{ router_name }} is already up to date ({{ installed_version }})"
      when:
        - not update_failed
        - not upgrade_needed
      tags: upgrade

    - name: Trigger package install
      community.routeros.command:
        commands:
          - /system package update install
      register: upgrade_result
      when: upgrade_needed
      tags: upgrade

    - name: Wait for router to come back
      ansible.builtin.wait_for_connection:
        delay: 180
        timeout: 600
        sleep: 10
      when:
        - upgrade_needed
        - upgrade_result is succeeded
      tags: upgrade

    - name: Confirm upgraded version
      community.routeros.command:
        commands:
          - /system resource print
      register: post_upgrade_info
      when: upgrade_needed
      tags: upgrade

    - name: Parse post-upgrade version
      ansible.builtin.set_fact:
        post_upgrade_version: >-
          {{
            post_upgrade_info.stdout[0]
            | regex_search('version: ([^\\s]+)', '\\1')
            | default('unknown', true)
          }}
      when: upgrade_needed
      tags: upgrade

    - name: Show post-upgrade version
      ansible.builtin.debug:
        msg: "Router {{ router_name }} upgraded to {{ post_upgrade_version }}"
      when: upgrade_needed
      tags: upgrade

    # ----------------------------
    # Build Checkmk result
    # ----------------------------
    - name: Build Checkmk result when no upgrade was needed
      ansible.builtin.set_fact:
        cmk_state: "{{ 2 if update_failed else 0 }}"
        cmk_output: >-
          {{ 'CRIT' if update_failed else 'OK' }} - router={{ router_name }}
          backup=ok
          channel={{ update_channel }}
          installed={{ installed_version }}
          latest={{ latest_version }}
          status="{{ update_status }}"
          upgrade_needed=no
          backup_file={{ backup_file | default('n/a') }}
          backup_ts={{ ts }}
      when: not upgrade_needed
      tags: always

    - name: Build Checkmk result when upgrade succeeded
      ansible.builtin.set_fact:
        cmk_state: "{{ 0 if post_upgrade_version == latest_version else 2 }}"
        cmk_output: >-
          {{ 'OK' if post_upgrade_version == latest_version else 'CRIT' }} - router={{ router_name }}
          backup=ok
          channel={{ update_channel }}
          installed_before={{ installed_version }}
          latest={{ latest_version }}
          status="{{ update_status }}"
          upgrade_needed=yes
          upgraded_to={{ post_upgrade_version }}
          backup_file={{ backup_file | default('n/a') }}
          backup_ts={{ ts }}
      when: upgrade_needed
      tags: always

    # ----------------------------
    # Send to Checkmk
    # ----------------------------
    - name: Send result to Checkmk
      delegate_to: localhost
      ansible.builtin.uri:
        url: "{{ checkmk_url }}"
        method: POST
        headers:
          Authorization: "Bearer {{ lookup('env', 'CHECKMK_TOKEN') }}"
          Accept: "application/json"
          Content-Type: "application/json"
        body_format: json
        body:
          host_name: "{{ router_name }}"
          service_description: "{{ checkmk_service_description }}"
          state: "{{ cmk_state | int }}"
          output: "{{ cmk_output }}"
        return_content: true
        status_code:
          - 200
          - 201
          - 204
      register: checkmk_result
      failed_when: false
      tags: always

    - name: Show Checkmk response
      ansible.builtin.debug:
        var: checkmk_result
      tags: always