---
- name: Physical install safety confirmation
  when: system_cfg.type == "physical"
  ansible.builtin.assert:
    that:
      - physical_install_confirmed | default(false) | bool
    fail_msg: >-
      DANGER: Physical install will WIPE {{ install_drive }} on {{ inventory_hostname }}.
      Set physical_install_confirmed=true in inventory to proceed.
    quiet: true

- name: VM existence protection check
  when: system_cfg.type == "virtual"
  block:
    - name: Check if VM already exists on libvirt
      when: hypervisor_type == "libvirt"
      delegate_to: localhost
      become: false
      community.libvirt.virt:
        command: list_vms
      register: system_check_libvirt_existing_vms
      changed_when: false
      failed_when: false

    - name: Abort if VM already exists on libvirt
      when: hypervisor_type == "libvirt"
      ansible.builtin.assert:
        that:
          - hostname not in system_check_libvirt_existing_vms.domains | default([])
        fail_msg: |
          VM {{ hostname }} already exists on libvirt hypervisor.
          To avoid data loss, the playbook will not overwrite or delete existing VMs.
          Please choose a different hostname or remove the existing VM manually before proceeding.
        quiet: true

    - name: Check VM existence on Proxmox
      when: hypervisor_type == "proxmox"
      delegate_to: localhost
      become: false
      module_defaults:
        community.proxmox.proxmox_vm_info:
          api_host: "{{ hypervisor_cfg.url }}"
          api_user: "{{ hypervisor_cfg.username }}"
          api_password: "{{ hypervisor_cfg.password }}"
      block:
        - name: Query Proxmox for existing VM
          community.proxmox.proxmox_vm_info:
            node: "{{ hypervisor_cfg.host }}"
            vmid: "{{ system_cfg.id }}"
            name: "{{ hostname }}"
            type: qemu
          register: system_check_proxmox_check_result
          changed_when: false
          no_log: true

        - name: Abort if VM already exists on Proxmox
          ansible.builtin.assert:
            that:
              - system_check_proxmox_check_result.proxmox_vms | default([]) | length == 0
            fail_msg: |
              VM {{ hostname }} (ID: {{ system_cfg.id }}) already exists on Proxmox hypervisor.
              To avoid data loss, the playbook will not overwrite or delete existing VMs.
              Please choose a different hostname or VM ID, or remove the existing VM manually before proceeding.
            quiet: true

    - name: Check VM existence in vCenter
      when: hypervisor_type == "vmware"
      delegate_to: localhost
      module_defaults:
        community.vmware.vmware_guest_info:
          hostname: "{{ hypervisor_cfg.url }}"
          username: "{{ hypervisor_cfg.username }}"
          password: "{{ hypervisor_cfg.password }}"
          validate_certs: "{{ hypervisor_cfg.certs | bool }}"
      block:
        - name: Query vCenter for existing VM
          community.vmware.vmware_guest_info:
            datacenter: "{{ hypervisor_cfg.datacenter }}"
            name: "{{ hostname }}"
            folder: "{{ system_cfg.path if system_cfg.path | length > 0 else omit }}"
          register: system_check_vmware_check_result
          failed_when: false
          changed_when: false
          no_log: true

        - name: Fail if vCenter lookup failed unexpectedly
          ansible.builtin.assert:
            that:
              - not system_check_vmware_check_result.failed
                or (system_check_vmware_check_result.msg is search('non-existing VM'))
            fail_msg: |
              Unable to verify VM existence in vCenter.
              {{ system_check_vmware_check_result.msg | default('Unknown error') }}
            quiet: true

        - name: Abort if VM already exists in vCenter
          ansible.builtin.assert:
            that:
              - system_check_vmware_check_result.instance is not defined
            fail_msg: |
              VM {{ hostname }} already exists in vCenter.
              To avoid data loss, the playbook will not overwrite or delete existing VMs.
              Please choose a different hostname or remove the existing VM manually before proceeding.
            quiet: true

    - name: Check if VM already exists on Xen
      when: hypervisor_type == "xen"
      delegate_to: localhost
      ansible.builtin.command:
        argv:
          - xl
          - list
      register: system_check_xen_existing_vms
      changed_when: false
      failed_when: false

    - name: Abort if VM already exists on Xen
      when: hypervisor_type == "xen"
      ansible.builtin.assert:
        that:
          - >-
            not (
              system_check_xen_existing_vms.stdout | default('')
              is search('(?m)^' ~ (hostname | ansible.builtin.regex_escape) ~ '\\s+\\d+\\s')
            )
        fail_msg: |
          VM {{ hostname }} already exists on Xen hypervisor.
          To avoid data loss, the playbook will not overwrite or delete existing VMs.
          Please choose a different hostname or remove the existing VM manually before proceeding.
        quiet: true