---
# Nextcloud Upgrade Stage Task File (Fixed Version)
# This file is included by 260123-upgrade-nextcloud-v2.yml for each upgrade stage
# Do not run directly
#
# Improvements:
# - Better version detection (actual running version)
# - Proper error handling
# - Clearer status messages
# - Maintenance mode handling

- name: "Stage {{ stage.stage }}: Starting v{{ stage.from }} → v{{ stage.to }}"
  debug:
    msg: |
      ============================================================
      Stage {{ stage.stage }}: Upgrading v{{ stage.from }} → v{{ stage.to }}
      ============================================================

- name: "Stage {{ stage.stage }}: Get current running version"
  shell: docker exec -u www-data nextcloud php occ status --output=json
  register: stage_version_check
  changed_when: false

- name: "Stage {{ stage.stage }}: Parse current version"
  set_fact:
    stage_current: "{{ (stage_version_check.stdout | from_json).versionstring }}"

- name: "Stage {{ stage.stage }}: Display current version"
  debug:
    msg: "Currently running: v{{ stage_current }}"

- name: "Stage {{ stage.stage }}: Check if already on target version"
  debug:
    msg: "✓ Already on v{{ stage_current }} - skipping this stage"
  when: stage_current is version(stage.to, '>=')

- name: "Stage {{ stage.stage }}: Skip if already upgraded"
  meta: end_play
  when: stage_current is version(stage.to, '>=')

- name: "Stage {{ stage.stage }}: Verify version is compatible"
  fail:
    msg: "Cannot upgrade from v{{ stage_current }} (expected v{{ stage.from }}.x)"
  when: stage_current is version(stage.from, '<') or (stage_current is version(stage.to, '>='))

- name: "Stage {{ stage.stage }}: Update docker-compose.yml to v{{ stage.to }}"
  replace:
    path: "{{ nextcloud_base_dir }}/docker-compose.yml"
    regexp: 'image:\s*nextcloud:{{ stage.from }}'
    replace: 'image: nextcloud:{{ stage.to }}'

- name: "Stage {{ stage.stage }}: Verify docker-compose.yml was updated"
  shell: grep "image{{ ':' }} nextcloud{{ ':' }}{{ stage.to }}" {{ nextcloud_base_dir }}/docker-compose.yml
  register: compose_verify
  changed_when: false
  failed_when: compose_verify.rc != 0

- name: "Stage {{ stage.stage }}: Pull Nextcloud v{{ stage.to }} image"
  shell: docker pull nextcloud:{{ stage.to }}
  register: image_pull
  changed_when: "'Downloaded' in image_pull.stdout or 'Pulling' in image_pull.stdout or 'Downloaded newer' in image_pull.stderr"

- name: "Stage {{ stage.stage }}: Stop containers before upgrade"
  community.docker.docker_compose_v2:
    project_src: "{{ nextcloud_base_dir }}"
    state: stopped

- name: "Stage {{ stage.stage }}: Start containers with new version"
  community.docker.docker_compose_v2:
    project_src: "{{ nextcloud_base_dir }}"
    state: present

- name: "Stage {{ stage.stage }}: Wait for Nextcloud container to be ready"
  shell: |
    count=0
    max_attempts=60
    while [ $count -lt $max_attempts ]; do
      if docker exec nextcloud curl -f http://localhost:80/status.php 2>/dev/null; then
        echo "Container ready after $count attempts"
        exit 0
      fi
      sleep 5
      count=$((count + 1))
    done
    echo "Timeout waiting for container after $max_attempts attempts"
    exit 1
  register: container_ready
  changed_when: false

- name: "Stage {{ stage.stage }}: Run occ upgrade"
  shell: docker exec -u www-data nextcloud php occ upgrade --no-interaction
  register: occ_upgrade
  changed_when: "'Update successful' in occ_upgrade.stdout or 'upgraded' in occ_upgrade.stdout"
  failed_when:
    - occ_upgrade.rc != 0
    - "'already latest version' not in occ_upgrade.stdout"
    - "'No upgrade required' not in occ_upgrade.stdout"

- name: "Stage {{ stage.stage }}: Display upgrade output"
  debug:
    msg: "{{ occ_upgrade.stdout_lines }}"

- name: "Stage {{ stage.stage }}: Verify upgrade succeeded"
  shell: docker exec -u www-data nextcloud php occ status --output=json
  register: stage_verify
  changed_when: false

- name: "Stage {{ stage.stage }}: Parse upgraded version"
  set_fact:
    stage_upgraded: "{{ (stage_verify.stdout | from_json).versionstring }}"

- name: "Stage {{ stage.stage }}: Check upgrade was successful"
  fail:
    msg: "Upgrade to v{{ stage.to }} failed - still on v{{ stage_upgraded }}"
  when: stage_upgraded is version(stage.to, '<')

- name: "Stage {{ stage.stage }}: Success"
  debug:
    msg: |
      ============================================================
      ✓ Stage {{ stage.stage }} completed successfully
      Upgraded from v{{ stage_current }} to v{{ stage_upgraded }}
      ============================================================