# provider "azurerm" {
#   subscription_id = "${var.subscription_id}"
#   client_id       = "${var.client_id}"
#   client_secret   = "${var.client_secret}"
#   tenant_id       = "${var.tenant_id}"
# }
    
resource "azurerm_resource_group" "rg" {
  name     = "${var.resource_group}"
  location = "${var.location}"
}

resource "azurerm_virtual_network" "vnet" {
  name                = "${var.resource_group}vnet"
  location            = "${azurerm_resource_group.rg.location}"
  address_space       = ["10.0.0.0/16"]
  resource_group_name = "${azurerm_resource_group.rg.name}"
}

resource "azurerm_subnet" "subnet" {
  name                 = "subnet"
  address_prefix       = "10.0.0.0/24"
  resource_group_name  = "${azurerm_resource_group.rg.name}"
  virtual_network_name = "${azurerm_virtual_network.vnet.name}"
}

resource "azurerm_public_ip" "pip" {
  name                         = "${var.hostname}-pip"
  location                     = "${azurerm_resource_group.rg.location}"
  resource_group_name          = "${azurerm_resource_group.rg.name}"
  public_ip_address_allocation = "Dynamic"
  domain_name_label            = "${var.hostname}"
}

resource "azurerm_lb" "lb" {
  name                = "LoadBalancer"
  location            = "${azurerm_resource_group.rg.location}"
  resource_group_name = "${azurerm_resource_group.rg.name}"
  depends_on          = ["azurerm_public_ip.pip"]

  frontend_ip_configuration {
    name                 = "LBFrontEnd"
    public_ip_address_id = "${azurerm_public_ip.pip.id}"
  }
}

resource "azurerm_lb_backend_address_pool" "backlb" {
  name                = "BackEndAddressPool"
  resource_group_name = "${azurerm_resource_group.rg.name}"
  loadbalancer_id     = "${azurerm_lb.lb.id}"
}

resource "azurerm_lb_nat_pool" "np" {
  resource_group_name            = "${azurerm_resource_group.rg.name}"
  loadbalancer_id                = "${azurerm_lb.lb.id}"
  name                           = "NATPool"
  protocol                       = "Tcp"
  frontend_port_start            = 50000
  frontend_port_end              = 50119
  backend_port                   = 22
  frontend_ip_configuration_name = "LBFrontEnd"
}

resource "azurerm_storage_account" "stor" {
  name                = "${var.resource_group}stor"
  location            = "${azurerm_resource_group.rg.location}"
  resource_group_name = "${azurerm_resource_group.rg.name}"
  account_type        = "${var.storage_account_type}"
}

resource "azurerm_storage_container" "vhds" {
  name                  = "vhds"
  resource_group_name   = "${azurerm_resource_group.rg.name}"
  storage_account_name  = "${azurerm_storage_account.stor.name}"
  container_access_type = "blob"
}

resource "azurerm_virtual_machine_scale_set" "scaleset" {
  name                = "autoscalewad"
  location            = "${azurerm_resource_group.rg.location}"
  resource_group_name = "${azurerm_resource_group.rg.name}"
  upgrade_policy_mode = "Manual"
  overprovision       = true
  depends_on          = ["azurerm_lb.lb", "azurerm_virtual_network.vnet"]

  sku {
    name     = "${var.vm_sku}"
    tier     = "Standard"
    capacity = "${var.instance_count}"
  }

  os_profile {
    computer_name_prefix = "${var.vmss_name}"
    admin_username       = "${var.admin_username}"
    admin_password       = "${var.admin_password}"
  }

  os_profile_linux_config {
    disable_password_authentication = false
  }

  network_profile {
    name    = "${var.hostname}-nic"
    primary = true

    ip_configuration {
      name                                   = "${var.hostname}ipconfig"
      subnet_id                              = "${azurerm_subnet.subnet.id}"
      load_balancer_backend_address_pool_ids = ["${azurerm_lb_backend_address_pool.backlb.id}"]
      load_balancer_inbound_nat_rules_ids    = ["${element(azurerm_lb_nat_pool.np.*.id, count.index)}"]
    }
  }

  storage_profile_os_disk {
    name           = "${var.hostname}"
    caching        = "ReadWrite"
    create_option  = "FromImage"
    vhd_containers = ["${azurerm_storage_account.stor.primary_blob_endpoint}${azurerm_storage_container.vhds.name}"]
  }

  storage_profile_image_reference {
    publisher = "${var.image_publisher}"
    offer     = "${var.image_offer}"
    sku       = "${var.ubuntu_os_version}"
    version   = "latest"
  }
}