- name: Fast-Track Nextcloud Upgrade (Skip Discovery)
  hosts: all
  become: yes

  vars:
    nextcloud_dir: /var/www/nextcloud
    php_cli_path: /usr/bin/php
    web_service_name: httpd

    nc_web_user: apache 

    occ_env:
      TMPDIR: /tmp

    core_apps:
      - activity
      - twofactor_nextcloud_notification
      - files
      - settings
      - dav
      - updater
      - workflowengine
      - theming
      - user_ldap
      - dashboard
      - federation
      - updatestatus
      - accessibility
      - serverinfo

  tasks:

    - name: Reminder - ensure backups exist
      debug:
        msg: "⚠️ CRITICAL: Ensure you have valid DB + data backups BEFORE proceeding!"

    - name: Pause playbook for 3 seconds
      pause:
        seconds: 3
        prompt: "Press Ctrl+C then A to abort if no backups exist."

    # ----------------------------------------------------------------------
    # VERSION CHECK
    # ----------------------------------------------------------------------
    - name: 1.1 - Get current NC status
      command: "{{ php_cli_path }} occ status"
      args:
        chdir: "{{ nextcloud_dir }}"
      become_user: "{{ nc_web_user }}"
      register: occ_status
      changed_when: false
      failed_when: "'installed: true' not in occ_status.stdout"

    - name: 1.2 - Parse current version
      set_fact:
        current_version: "{{ occ_status.stdout | regex_search('versionstring: (.*)', '\\1') | first | default('unknown') }}"

    - name: 1.3 - Show current version
      debug:
        msg: "Current Nextcloud version: {{ current_version }}"

    # ----------------------------------------------------------------------
    # PRE-UPGRADE PREPARATION
    # ----------------------------------------------------------------------
    - name: 2.1 - Get list of installed apps
      command: "{{ php_cli_path }} occ app:list"
      args:
        chdir: "{{ nextcloud_dir }}"
      become_user: "{{ nc_web_user }}"
      register: app_list
      changed_when: false

    - name: 2.2 - Disable all non-core 3rd party apps
      command: "{{ php_cli_path }} occ app:disable {{ item }}"
      args:
        chdir: "{{ nextcloud_dir }}"
      become_user: "{{ nc_web_user }}"
      environment: "{{ occ_env }}"
      loop: "{{ app_list.stdout_lines | select('match', '^[ ]*-[ ](.*):[ ]enabled$') | map('regex_replace', '^[ ]*-[ ](.*):[ ]enabled$', '\\1') | list }}"
      register: app_disable_result
      when: item not in core_apps
      ignore_errors: yes

    - name: 2.3 - Save disabled apps list
      set_fact:
        disabled_apps: "{{ app_disable_result.results | selectattr('changed', 'defined') | selectattr('changed') | map(attribute='item') | list }}"
      when: app_disable_result is defined and app_disable_result.results is defined

    # ----------------------------------------------------------------------
    # UPGRADE BLOCK WITH RESCUE + ALWAYS
    # ----------------------------------------------------------------------
    - name: 3.0 - Perform Nextcloud Upgrade (Transactional)
      block:

        - name: 3.1 - Enable maintenance mode
          command: "{{ php_cli_path }} occ maintenance:mode --on"
          args:
            chdir: "{{ nextcloud_dir }}"
          become_user: "{{ nc_web_user }}"
          environment: "{{ occ_env }}"

        - name: 3.2 - Run Nextcloud CLI updater (retry)
          command: "{{ php_cli_path }} updater/updater.phar --no-interaction"
          args:
            chdir: "{{ nextcloud_dir }}"
          become_user: "{{ nc_web_user }}"
          environment: "{{ occ_env }}"
          register: updater_result
          until:
            - updater_result.rc == 0
            - "'Update successful' in updater_result.stdout or 'Nextcloud is already latest version' in updater_result.stdout"
          retries: 3
          delay: 10
          failed_when:
            - updater_result.rc != 0
            - "'Nextcloud is already latest version' not in updater_result.stdout"

        - name: 3.3 - Run occ upgrade (DB update)
          command: "{{ php_cli_path }} occ upgrade"
          args:
            chdir: "{{ nextcloud_dir }}"
          become_user: "{{ nc_web_user }}"
          environment: "{{ occ_env }}"

        - name: 3.4 - Cleanup commands
          command: "{{ item }}"
          args:
            chdir: "{{ nextcloud_dir }}"
          become_user: "{{ nc_web_user }}"
          environment: "{{ occ_env }}"
          loop:
            - "{{ php_cli_path }} occ db:add-missing-indices"
            - "{{ php_cli_path }} occ db:convert-filecache-bigint --no-interaction"
          ignore_errors: yes

        - name: 3.5 - Disable maintenance mode (success)
          command: "{{ php_cli_path }} occ maintenance:mode --off"
          args:
            chdir: "{{ nextcloud_dir }}"
          become_user: "{{ nc_web_user }}"
          environment: "{{ occ_env }}"

        - name: 3.6 - Re-enable disabled apps
          command: "{{ php_cli_path }} occ app:enable {{ item }}"
          args:
            chdir: "{{ nextcloud_dir }}"
          become_user: "{{ nc_web_user }}"
          environment: "{{ occ_env }}"
          loop: "{{ disabled_apps | default([]) }}"
          when: disabled_apps is defined and disabled_apps | length > 0
          ignore_errors: yes

        - name: 3.7 - Restart web service
          service:
            name: "{{ web_service_name }}"
            state: restarted

        - name: 3.8 - Verify version after upgrade
          command: "{{ php_cli_path }} occ status"
          args:
            chdir: "{{ nextcloud_dir }}"
          become_user: "{{ nc_web_user }}"
          environment: "{{ occ_env }}"
          register: occ_status_after
          changed_when: false

        - name: 3.9 - Final version info
          debug:
            var: occ_status_after.stdout

        - name: 3.10 - Upgrade complete
          debug:
            msg: "Nextcloud successfully upgraded!"

      rescue:

        - name: ❌ UPGRADE FAILED - Details
          debug:
            msg: |
              !!!!!!!!!!! NEXTCLOUD UPGRADE FAILED !!!!!!!!!!!!
              Host: {{ inventory_hostname }}
              Maintenance mode will be disabled.
              Check logs:
                - {{ nextcloud_dir }}/data/updater.log
                - {{ nextcloud_dir }}/data/nextcloud.log

      always:

        - name: ALWAYS disable maintenance mode (success or failure)
          command: "{{ php_cli_path }} occ maintenance:mode --off"
          args:
            chdir: "{{ nextcloud_dir }}"
          become_user: "{{ nc_web_user }}"
          environment: "{{ occ_env }}"
          ignore_errors: yes

        - name: Final failure (only triggered if rescue was hit)
          fail:
            msg: "Nextcloud upgrade failed — maintenance mode disabled."
          when: ansible_failed_task is defined