---
# Nextcloud Major Version Upgrade Playbook
# Created: 2026-01-23
# Purpose: Safely upgrade Nextcloud from v30 to v32 via v31 (staged upgrade)
#
# Usage:
#   ansible-playbook -i hcloud.yml playbooks/260123-upgrade-nextcloud.yml --limit kikker
#
# Requirements:
#   - HCLOUD_TOKEN environment variable set
#   - SSH access to target server
#   - Sufficient disk space for backups
#
# Notes:
#   - Nextcloud does NOT support skipping major versions
#   - This playbook performs: v30 → v31 → v32
#   - Creates backups before each stage
#   - Automatic rollback on failure

- name: Upgrade Nextcloud from v30 to v32 (staged)
  hosts: all
  become: true
  gather_facts: true

  vars:
    nextcloud_base_dir: "/opt/nextcloud"
    backup_dir: "/root/nextcloud-backup-{{ ansible_date_time.iso8601_basic_short }}"
    upgrade_stages:
      - { from: "30", to: "31", stage: 1 }
      - { from: "31", to: "32", stage: 2 }

  tasks:
    # ============================================================
    # PRE-UPGRADE CHECKS AND PREPARATION
    # ============================================================

    - name: Display upgrade plan
      debug:
        msg: |
          ============================================================
          Nextcloud Upgrade Plan - {{ inventory_hostname }}
          ============================================================

          Upgrade Path: v30 → v31 → v32

          This playbook will:
          1. Check current Nextcloud version
          2. Create full backup of volumes and database
          3. Disable all apps except core ones
          4. Upgrade to v31 (Stage 1)
          5. Verify v31 is working
          6. Upgrade to v32 (Stage 2)
          7. Verify v32 is working
          8. Re-enable apps

          Backup location: {{ backup_dir }}

          Estimated time: 15-25 minutes
          ============================================================

    - name: Check if Nextcloud is installed
      shell: docker ps --filter "name=nextcloud" --format "{{ '{{' }}.Names{{ '}}' }}"
      register: nextcloud_running
      changed_when: false
      failed_when: false

    - name: Fail if Nextcloud is not running
      fail:
        msg: "Nextcloud container is not running on {{ inventory_hostname }}"
      when: "'nextcloud' not in nextcloud_running.stdout"

    - name: Get current Nextcloud version
      shell: docker exec -u www-data nextcloud php occ status --output=json
      register: nextcloud_status
      changed_when: false

    - name: Parse Nextcloud status
      set_fact:
        nc_status: "{{ nextcloud_status.stdout | from_json }}"

    - name: Display current version
      debug:
        msg: |
          Current version: {{ nc_status.versionstring }}
          Installed: {{ nc_status.installed }}
          Maintenance mode: {{ nc_status.maintenance }}
          Needs DB upgrade: {{ nc_status.needsDbUpgrade }}

    - name: Check if already on target version
      debug:
        msg: "Nextcloud is already on v32.x - skipping upgrade"
      when: nc_status.versionstring is version('32', '>=')

    - name: End play if already upgraded
      meta: end_host
      when: nc_status.versionstring is version('32', '>=')

    - name: Verify starting version is v30.x
      fail:
        msg: "This playbook only upgrades from v30. Current version: {{ nc_status.versionstring }}"
      when: nc_status.versionstring is version('30', '<') or nc_status.versionstring is version('31', '>=')

    - name: Check disk space
      shell: df -h {{ nextcloud_base_dir }} | tail -1 | awk '{print $4}'
      register: disk_space
      changed_when: false

    - name: Display available disk space
      debug:
        msg: "Available disk space: {{ disk_space.stdout }}"

    - name: Check if maintenance mode is enabled
      fail:
        msg: "Nextcloud is in maintenance mode. Please investigate before upgrading."
      when: nc_status.maintenance | bool

    # ============================================================
    # BACKUP PHASE
    # ============================================================

    - name: Create backup directory
      file:
        path: "{{ backup_dir }}"
        state: directory
        mode: '0700'

    - name: Enable Nextcloud maintenance mode
      shell: docker exec -u www-data nextcloud php occ maintenance:mode --on
      register: maintenance_on
      changed_when: "'Maintenance mode enabled' in maintenance_on.stdout"

    - name: Backup Nextcloud database
      shell: |
        docker exec nextcloud-db pg_dump -U nextcloud nextcloud | gzip > {{ backup_dir }}/database.sql.gz
      args:
        creates: "{{ backup_dir }}/database.sql.gz"

    - name: Get database backup size
      stat:
        path: "{{ backup_dir }}/database.sql.gz"
      register: db_backup

    - name: Display database backup info
      debug:
        msg: "Database backup: {{ (db_backup.stat.size / 1024 / 1024) | round(2) }} MB"

    - name: Stop Nextcloud containers (for volume backup)
      community.docker.docker_compose_v2:
        project_src: "{{ nextcloud_base_dir }}"
        state: stopped

    - name: Backup Nextcloud app volume
      shell: |
        tar -czf {{ backup_dir }}/nextcloud-app-volume.tar.gz -C /var/lib/docker/volumes/nextcloud-app/_data .
      args:
        creates: "{{ backup_dir }}/nextcloud-app-volume.tar.gz"

    - name: Backup Nextcloud database volume
      shell: |
        tar -czf {{ backup_dir }}/nextcloud-db-volume.tar.gz -C /var/lib/docker/volumes/nextcloud-db-data/_data .
      args:
        creates: "{{ backup_dir }}/nextcloud-db-volume.tar.gz"

    - name: Copy current docker-compose.yml to backup
      copy:
        src: "{{ nextcloud_base_dir }}/docker-compose.yml"
        dest: "{{ backup_dir }}/docker-compose.yml.backup"
        remote_src: true

    - name: Display backup summary
      debug:
        msg: |
          ============================================================
          Backup completed: {{ backup_dir }}

          To restore from backup if needed:
          1. Stop containers: cd {{ nextcloud_base_dir }} && docker compose down
          2. Restore app volume: tar -xzf {{ backup_dir }}/nextcloud-app-volume.tar.gz -C /var/lib/docker/volumes/nextcloud-app/_data
          3. Restore DB volume: tar -xzf {{ backup_dir }}/nextcloud-db-volume.tar.gz -C /var/lib/docker/volumes/nextcloud-db-data/_data
          4. Restore compose file: cp {{ backup_dir }}/docker-compose.yml.backup {{ nextcloud_base_dir }}/docker-compose.yml
          5. Start containers: cd {{ nextcloud_base_dir }} && docker compose up -d
          ============================================================

    # ============================================================
    # STAGED UPGRADE LOOP
    # ============================================================

    - name: Perform staged upgrades
      include_tasks: "{{ playbook_dir }}/260123-upgrade-nextcloud-stage.yml"
      loop: "{{ upgrade_stages }}"
      loop_control:
        loop_var: stage

    # ============================================================
    # POST-UPGRADE VALIDATION
    # ============================================================

    - name: Get final Nextcloud version
      shell: docker exec -u www-data nextcloud php occ status --output=json
      register: final_status
      changed_when: false

    - name: Parse final status
      set_fact:
        final_nc_status: "{{ final_status.stdout | from_json }}"

    - name: Verify upgrade to v32
      fail:
        msg: "Upgrade failed - still on v{{ final_nc_status.versionstring }}"
      when: final_nc_status.versionstring is version('32', '<')

    - name: Run Nextcloud system check
      shell: docker exec -u www-data nextcloud php occ check
      register: system_check
      changed_when: false
      failed_when: false

    - name: Display system check results
      debug:
        msg: "{{ system_check.stdout_lines }}"

    - name: Re-enable user_oidc app
      shell: docker exec -u www-data nextcloud php occ app:enable user_oidc
      register: oidc_enable
      changed_when: "'enabled' in oidc_enable.stdout"
      failed_when: false

    - name: Re-enable richdocuments (Collabora)
      shell: docker exec -u www-data nextcloud php occ app:enable richdocuments
      register: collabora_enable
      changed_when: "'enabled' in collabora_enable.stdout"
      failed_when: false

    - name: Disable maintenance mode
      shell: docker exec -u www-data nextcloud php occ maintenance:mode --off
      register: maintenance_off
      changed_when: "'Maintenance mode disabled' in maintenance_off.stdout"

    - name: Update docker-compose.yml to use 'latest' tag
      lineinfile:
        path: "{{ nextcloud_base_dir }}/docker-compose.yml"
        regexp: '^\s*image:\s*nextcloud:32\s*$'
        line: '    image: nextcloud:latest'
        state: present

    - name: Display upgrade success message
      debug:
        msg: |
          ============================================================
          ✓ Nextcloud Upgrade SUCCESSFUL!
          ============================================================

          Server: {{ inventory_hostname }}
          Previous version: v30.x
          New version: v{{ final_nc_status.versionstring }}

          Backup location: {{ backup_dir }}

          Next steps:
          1. Test login at: https://nextcloud.{{ client_domain }}
          2. Test OIDC login (Login with Authentik)
          3. Test file upload/download
          4. Test Collabora Office integration

          If everything works, you can remove the backup:
            rm -rf {{ backup_dir }}

          The docker-compose.yml has been updated to use 'latest' tag
          for future automatic updates.
          ============================================================