---
# Sigvild Gallery Data Restoration Tasks

- name: Check for existing data backup files
  local_action:
    module: find
    paths: "{{ sigvild_gallery_backup_local_path }}"
    patterns: "sigvild-gallery-backup-*.tar.gz"
  register: backup_files
  become: false

- name: Display backup search results
  debug:
    msg:
      - "Searching for backups in: {{ sigvild_gallery_backup_local_path }}"
      - "Found {{ backup_files.files | length }} backup file(s)"

- name: Display found backup files
  debug:
    msg: "Found backup: {{ item.path }} ({{ (item.size / 1024 / 1024) | round(2) }}MB, {{ '%Y-%m-%d %H:%M:%S' | strftime(item.mtime | int) }})"
  loop: "{{ backup_files.files | sort(attribute='mtime') }}"
  when: backup_files.files | length > 0

- name: Check if data directory already exists with data
  stat:
    path: "{{ sigvild_gallery_data_dir }}/data.db"
  register: existing_data

- name: Warn about existing data
  debug:
    msg: "⚠️ WARNING: Existing data found at {{ sigvild_gallery_data_dir }}/data.db - restoration will overwrite it!"
  when: 
    - existing_data.stat.exists
    - backup_files.files | length > 0

- name: Skip restore due to existing data
  debug:
    msg:
      - "🛡️ SAFETY: Restore skipped to protect existing data"
      - "Remove {{ sigvild_gallery_data_dir }}/data.db manually to enable restore"
  when: 
    - existing_data.stat.exists
    - backup_files.files | length > 0

- name: Restore from latest backup
  block:
    - name: Get latest backup file
      set_fact:
        latest_backup: "{{ (backup_files.files | sort(attribute='mtime') | last).path }}"

    - name: Display restoration info
      debug:
        msg:
          - "Restoring from latest backup: {{ latest_backup | basename }}"
          - "Target directory: {{ sigvild_gallery_data_dir }}"

    - name: Check if sigvild-gallery service exists
      stat:
        path: /etc/systemd/system/sigvild-gallery.service
      register: sigvild_service_file

    - name: Stop sigvild-gallery service before restoration
      systemd:
        name: sigvild-gallery
        state: stopped
      register: service_stopped_for_restore
      when: sigvild_service_file.stat.exists
      ignore_errors: true

    - name: Display service stop status
      debug:
        msg: "{{ 'Service stopped for restoration' if sigvild_service_file.stat.exists else 'Service does not exist yet - skipping stop' }}"

    - name: Upload backup to remote server
      copy:
        src: "{{ latest_backup }}"
        dest: "/tmp/restore-backup.tar.gz"
        owner: root
        group: root
        mode: '0644'

    - name: Verify uploaded backup integrity
      command: tar -tzf /tmp/restore-backup.tar.gz
      register: restore_contents
      changed_when: false
      failed_when: "'data.db' not in restore_contents.stdout"

    - name: Remove existing data directory if it exists
      file:
        path: "{{ sigvild_gallery_data_dir }}"
        state: absent
      when: existing_data.stat.exists

    - name: Ensure parent directory exists
      file:
        path: "{{ sigvild_gallery_home }}"
        state: directory
        owner: "{{ sigvild_gallery_user }}"
        group: "{{ sigvild_gallery_user }}"
        mode: '0755'

    - name: Extract backup to target location
      unarchive:
        src: "/tmp/restore-backup.tar.gz"
        dest: "{{ sigvild_gallery_home }}"
        remote_src: true
        owner: "{{ sigvild_gallery_user }}"
        group: "{{ sigvild_gallery_user }}"

    - name: Verify restoration
      stat:
        path: "{{ sigvild_gallery_data_dir }}/data.db"
      register: restored_data

    - name: Fail if restoration unsuccessful
      fail:
        msg: "Restoration failed - data.db not found after extraction"
      when: not restored_data.stat.exists

    - name: Get restored data size
      command: du -sh {{ sigvild_gallery_data_dir }}
      register: restored_size
      changed_when: false

    - name: Clean up uploaded backup file
      file:
        path: "/tmp/restore-backup.tar.gz"
        state: absent

    - name: Display restoration success
      debug:
        msg:
          - "✅ Data restoration completed successfully!"
          - "Restored from: {{ latest_backup | basename }}"
          - "Restored data size: {{ restored_size.stdout }}"
          - "Location: {{ sigvild_gallery_data_dir }}"

  when: 
    - backup_files.files | length > 0
    - not existing_data.stat.exists

- name: No backup available message
  debug:
    msg:
      - "ℹ️ No backup files found - starting with fresh installation"
      - "Data directory will be created empty: {{ sigvild_gallery_data_dir }}"
  when: backup_files.files | length == 0