# Provider Setup

variable "hetzner_token" {
  type        = string
  description = "Hetzner Cloud API-Token"
}

variable "hetzner_default_location" {
  type        = string
  default = "nbg1"
}

variable "hetzner_server_image" {
  type        = string
  default = "debian-10"
}

variable "hetzner_default_server_type" {
  type        = string
  default = "cx11"
}

variable "hetzner_ssh_keys_filenames" {
  type        = set(string)
  default = [
    "~/.ssh/id_ed25519.pub",
  ]
}

provider "hcloud" {
  token = var.hetzner_token
}


# Network

#resource "hcloud_network" "internal_network" {
#  name = "internal_network"
#  ip_range = "10.0.0.0/8"
#}
#resource "hcloud_network_subnet" "internal_network" {
#  network_id = hcloud_network.internal_network.id
#  type = "server"
#  network_zone = "eu-central"
#  ip_range   = "10.9.0.0/16"
#}


# VMs

resource "hcloud_ssh_key" "ssh_keys" {
  name = each.value
  public_key = file(each.value)
  for_each = var.hetzner_ssh_keys_filenames
}

locals {
  hetzner_vm_hosts = {
    for hostname, host in var.vm_hosts: hostname => host
    if host.provider == "hetzner"
  }
  hetzner_vm_hosts_with_groups = {
    for hostname, host in local.hetzner_vm_hosts: hostname => host if contains(keys(host),"groups")
  }
  hetzner_vm_hosts_without_groups = {
    for hostname, host in local.hetzner_vm_hosts: hostname => host if !contains(keys(host),"groups")
  }
}

resource "hcloud_server" "vms" {
  name = each.key
  image = var.hetzner_server_image
  server_type = var.hetzner_default_server_type
  location = var.hetzner_default_location
  ssh_keys = [for value in hcloud_ssh_key.ssh_keys: value.id]

  lifecycle {
    ignore_changes = [
      ssh_keys,
    ]
  }

  for_each = local.hetzner_vm_hosts
}


# Volumes

locals {
  hetzner_volumes = { for item in flatten([
    for hostname, host in local.hetzner_vm_hosts: [
      for volumename, volume in lookup(host, "volumes", {}): {
        hostname = hostname
        volumename = volumename
        volume = volume
        host = host
      }
    ]
  ]): "${item.hostname}--${item.volumename}"  => merge(item.volume,{hostname=item.hostname}) }
}

resource "hcloud_volume" "volumes" {
  name = each.key

  location = var.hetzner_default_location
  size     = each.value.size

  for_each = local.hetzner_volumes
}

resource "hcloud_volume_attachment" "volume_attachments" {
  volume_id = hcloud_volume.volumes[each.key].id
  server_id = hcloud_server.vms[each.value.hostname].id
  #automount = true
  for_each = local.hetzner_volumes
}


# Provider Variable

locals {
  provider_hetzner = {
    hostvars = {
      for hostname, host in var.vm_hosts: hostname =>
        {
          external_ip = hcloud_server.vms[hostname].ipv4_address
          ansible_host = hcloud_server.vms[hostname].ipv4_address
          #internal_ip = hcloud_server_network.vms[hostname].ip
          volumes = {
            for volumename, volume in lookup(host, "volumes", {}): volumename => merge(volume,{
              device = hcloud_volume.volumes["${hostname}--${volumename}"].linux_device
            })
          }
        }
      if host.provider == "hetzner"
    }
  }
}