---
- name: Synology DSM - télécharger puis installer une mise à jour via SSH (robuste Semaphore)
  hosts: synology
  gather_facts: false

  vars:
    download_timeout: 3600
    reboot_timeout: 1800
    poll_delay: 20

    synoupgrade_candidates:
      - "/usr/syno/sbin/synoupgrade"
      - "/usr/syno/bin/synoupgrade"
      - "/usr/syno/sbin/synoupgrade2"
      - "/usr/syno/bin/synoupgrade2"
      - "/usr/sbin/synoupgrade"
      - "/usr/bin/synoupgrade"
      - "/usr/sbin/synoupgrade2"
      - "/usr/bin/synoupgrade2"

    start_subcommands:
      - "--start"
      - "--upgrade"
      - "--apply"
      - "--run"
      - "--install"

  tasks:
    - name: Détecter synoupgrade (sans [ ] ; fallback PATH)
      ansible.builtin.raw: |
        set -e
        FOUND=""
        for p in {{ synoupgrade_candidates | join(' ') }}; do
          if test -x "$p"; then
            FOUND="$p"
            break
          fi
        done

        if test -z "$FOUND"; then
          if command -v synoupgrade >/dev/null 2>&1; then
            FOUND="$(command -v synoupgrade)"
          elif command -v synoupgrade2 >/dev/null 2>&1; then
            FOUND="$(command -v synoupgrade2)"
          fi
        fi

        echo "FOUND=$FOUND"
      register: detect
      changed_when: false

    - name: Enregistrer le chemin synoupgrade détecté
      ansible.builtin.set_fact:
        synoupgrade_bin: "{{ (detect.stdout | regex_search('FOUND=(.*)', '\\1')) | default('') | trim }}"
      changed_when: false

    - name: Fail si synoupgrade introuvable
      ansible.builtin.fail:
        msg: >-
          synoupgrade introuvable. Sortie détection:
          {{ detect.stdout | default('') }}
      when: synoupgrade_bin == ""

    - name: Afficher le binaire trouvé
      ansible.builtin.debug:
        msg: "synoupgrade utilisé: {{ synoupgrade_bin }}"

    # 1) Check update
    - name: Check mise à jour disponible
      ansible.builtin.raw: "{{ synoupgrade_bin }} --check || true"
      register: check_out
      changed_when: false

    - name: Afficher le résultat du check
      ansible.builtin.debug:
        var: check_out.stdout_lines

    # Si check ne renvoie rien, on NE STOP pas automatiquement, car certains DSM sont muets.
    # On stop seulement si on voit des motifs "no update".
    - name: Stop si aucune mise à jour détectée (heuristique)
      ansible.builtin.meta: end_play
      when: >
        (check_out.stdout | lower) is search('no update')
        or (check_out.stdout | lower) is search('no newer')
        or (check_out.stdout | lower) is search('already')
        or (check_out.stdout | lower) is search('up to date')

    # 2) Download
    - name: Lancer le téléchargement
      ansible.builtin.raw: "{{ synoupgrade_bin }} --download"
      register: download_start
      changed_when: true

    - name: Afficher retour download start
      ansible.builtin.debug:
        var: download_start.stdout_lines

    # 3) Poll download
    - name: Attendre fin du téléchargement (status/log)
      ansible.builtin.raw: |
        set -e
        if {{ synoupgrade_bin }} --status >/dev/null 2>&1; then
          {{ synoupgrade_bin }} --status || true
        else
          (tail -n 80 /var/log/synoupgrade.log 2>/dev/null || true)
          (tail -n 120 /var/log/messages 2>/dev/null | grep -i upgrad || true)
        fi
      register: dl_poll
      changed_when: false
      until: >
        (dl_poll.stdout | lower) is search('downloaded')
        or (dl_poll.stdout | lower) is search('ready')
        or (dl_poll.stdout | lower) is search('finish')
        or (dl_poll.stdout | lower) is search('completed')
        or (dl_poll.stdout | lower) is search('done')
      retries: "{{ (download_timeout // poll_delay) | int }}"
      delay: "{{ poll_delay }}"

    - name: Afficher statut fin téléchargement
      ansible.builtin.debug:
        var: dl_poll.stdout_lines

    # 4) Start install (best effort)
    - name: Tenter de démarrer l'installation (plusieurs sous-commandes)
      ansible.builtin.raw: "{{ synoupgrade_bin }} {{ item }} || true"
      loop: "{{ start_subcommands }}"
      register: start_attempts
      changed_when: true
      failed_when: false

    - name: Choisir la première tentative OK (pas de mots d'erreur)
      ansible.builtin.set_fact:
        start_ok: >-
          {{
            (start_attempts.results
              | rejectattr('stdout', 'search', '(?i)(invalid|unknown|usage|not found|permission|error|failed)')
              | rejectattr('stderr', 'search', '(?i)(invalid|unknown|usage|not found|permission|error|failed)')
              | list
              | first) | default({})
          }}

    - name: Fail si aucune commande start ne marche
      ansible.builtin.fail:
        msg: >-
          Impossible de démarrer l'installation via synoupgrade.
          stdout: {{ start_attempts.results | map(attribute='stdout') | list }}
          stderr: {{ start_attempts.results | map(attribute='stderr') | list }}
      when: start_ok | length == 0

    - name: Afficher la commande start retenue
      ansible.builtin.debug:
        msg:
          - "Commande retenue: {{ start_ok.item }}"
          - "stdout: {{ start_ok.stdout | default('') }}"
          - "stderr: {{ start_ok.stderr | default('') }}"

    # 5) Wait reboot (SSH down/up)
    - name: Attendre que le NAS coupe SSH (reboot probable)
      ansible.builtin.wait_for:
        host: "{{ inventory_hostname }}"
        port: 22
        state: drained
        timeout: 300
      delegate_to: localhost

    - name: Attendre le retour SSH
      ansible.builtin.wait_for:
        host: "{{ inventory_hostname }}"
        port: 22
        state: started
        timeout: "{{ reboot_timeout }}"
      delegate_to: localhost

    # 6) Post-check
    - name: Post-check version / statut
      ansible.builtin.raw: |
        uname -a || true
        cat /etc/VERSION 2>/dev/null || true
        {{ synoupgrade_bin }} --status 2>/dev/null || true
      register: post
      changed_when: false

    - name: Afficher post-check
      ansible.builtin.debug:
        var: post.stdout_lines