---
# =============================================================================
# Validation Tasks - Pre-flight Checks
# =============================================================================

- name: Validate distribution selection
  assert:
    that:
      - deploy_linux_vm_os_distribution is defined
      - deploy_linux_vm_os_distribution in deploy_linux_vm_cloud_images.keys()
    fail_msg: |
      Invalid distribution '{{ deploy_linux_vm_os_distribution }}'.
      Supported distributions: {{ deploy_linux_vm_cloud_images.keys() | list | join(', ') }}
    success_msg: "Distribution '{{ deploy_linux_vm_os_distribution }}' is valid"
  tags: [validate, preflight]

- name: Set distribution facts
  set_fact:
    deploy_linux_vm_distro_config: "{{ deploy_linux_vm_cloud_images[deploy_linux_vm_os_distribution] }}"
    deploy_linux_vm_image_cache_path: "{{ deploy_linux_vm_images_dir }}/{{ deploy_linux_vm_cloud_images[deploy_linux_vm_os_distribution].cache_name }}"
  tags: [always]

- name: Display deployment information
  debug:
    msg:
      - "=== VM Deployment Configuration ==="
      - "VM Name: {{ deploy_linux_vm_name }}"
      - "Distribution: {{ deploy_linux_vm_os_distribution }}"
      - "OS Family: {{ deploy_linux_vm_distro_config.family }}"
      - "Package Manager: {{ deploy_linux_vm_distro_config.package_manager }}"
      - "vCPUs: {{ deploy_linux_vm_vcpus }}"
      - "Memory: {{ deploy_linux_vm_memory_mb }} MB"
      - "Disk: {{ deploy_linux_vm_disk_size_gb }} GB"
      - "LVM Enabled: {{ deploy_linux_vm_use_lvm }}"
  tags: [validate, preflight]

- name: Validate VM name
  assert:
    that:
      - deploy_linux_vm_name is defined
      - deploy_linux_vm_name | length > 0
      - deploy_linux_vm_name is match('^[a-zA-Z0-9_-]+$')
    fail_msg: "VM name must be defined and contain only alphanumeric characters, hyphens, or underscores"
    success_msg: "VM name '{{ deploy_linux_vm_name }}' is valid"
  tags: [validate, preflight]

- name: Check if VM already exists
  command: virsh dominfo {{ deploy_linux_vm_name }}
  register: deploy_linux_vm_exists_check
  failed_when: false
  changed_when: false
  tags: [validate, preflight]

- name: Fail if VM already exists
  fail:
    msg: "VM '{{ deploy_linux_vm_name }}' already exists on hypervisor. Please choose a different name or destroy the existing VM."
  when: deploy_linux_vm_exists_check.rc == 0
  tags: [validate, preflight]

- name: Verify virtualization support
  command: virt-host-validate qemu
  register: deploy_linux_vm_virt_validation
  failed_when: false
  changed_when: false
  tags: [validate, preflight]

- name: Display virtualization validation results
  debug:
    var: deploy_linux_vm_virt_validation.stdout_lines
  tags: [validate, preflight]

- name: Validate LVM configuration
  assert:
    that:
      - deploy_linux_vm_lvm_vg_name is defined
      - deploy_linux_vm_lvm_pv_device is defined
      - deploy_linux_vm_lvm_volumes is defined
      - deploy_linux_vm_lvm_volumes | length > 0
    fail_msg: "LVM is enabled but configuration is incomplete"
    success_msg: "LVM configuration is valid"
  when: deploy_linux_vm_use_lvm | bool
  tags: [validate, preflight, lvm]