# Cloud-init configuration for branch-specific bootstrap
#
# This file manages custom cloud-init snippets for VMs that need to bootstrap
# from a specific git branch (non-master). Production VMs omit flake_branch
# and use the default master branch.

# Generate cloud-init snippets for VMs with custom branch configuration
resource "local_file" "cloud_init_branch" {
  for_each = {
    for name, vm in local.vm_configs : name => vm
    if vm.flake_branch != null
  }

  filename = "${path.module}/.generated/cloud-init-${each.key}.yml"
  content = yamlencode({
    # Write NIXOS_FLAKE_BRANCH to /etc/environment
    # This will be read by bootstrap.nix service via EnvironmentFile
    write_files = [{
      path    = "/etc/environment"
      content = "NIXOS_FLAKE_BRANCH=${each.value.flake_branch}\n"
      append  = true
    }]
  })

  file_permission = "0644"
}

# Upload cloud-init snippets to Proxmox
# Note: This requires SSH access to the Proxmox host
# Alternative: Manually copy files or use Proxmox API if available
resource "null_resource" "upload_cloud_init" {
  for_each = {
    for name, vm in local.vm_configs : name => vm
    if vm.flake_branch != null
  }

  # Trigger re-upload when content changes
  triggers = {
    content_hash = local_file.cloud_init_branch[each.key].content
  }

  # Upload the cloud-init file to Proxmox snippets directory
  provisioner "local-exec" {
    command = <<-EOT
      scp -o StrictHostKeyChecking=no \
        ${local_file.cloud_init_branch[each.key].filename} \
        ${var.proxmox_host}:/var/lib/vz/snippets/cloud-init-${each.key}.yml
    EOT
  }

  depends_on = [local_file.cloud_init_branch]
}

# Ensure VMs depend on cloud-init being uploaded
# This is handled implicitly by the cicustom reference in vms.tf