resource "azurerm_network_interface" "nic" {
  name                = "vnic"
  location            = var.location
  resource_group_name = var.resource_group_name

  ip_configuration {
    name                          = "internal"
    subnet_id                     = var.subnet_id
    private_ip_address_allocation = "Dynamic"
    public_ip_address_id          = azurerm_public_ip.vm_public.id
  }
}

resource "azurerm_network_interface_security_group_association" "example" {
  network_interface_id      = azurerm_network_interface.nic.id
  network_security_group_id = azurerm_network_security_group.vm_nsg.id

  depends_on = [azurerm_network_security_group.vm_nsg]
}

resource "azurerm_network_security_group" "vm_nsg" {
  name                = "vm-nsg"
  resource_group_name = var.resource_group_name
  location            = var.location

  security_rule {
    name                       = "SSH"
    priority                   = 1001
    direction                  = "Inbound"
    access                     = "Allow"
    protocol                   = "Tcp"
    source_port_range          = "*"
    destination_port_range     = "22"
    source_address_prefix      = var.ex_ip
    destination_address_prefix = "*"
  }
}

resource "azurerm_public_ip" "vm_public" {
  name                = "example-pip"
  location            = var.location
  resource_group_name = var.resource_group_name
  allocation_method   = "Static"
}

resource "azurerm_linux_virtual_machine" "vm" {
  name                = "example-vm"
  resource_group_name = var.resource_group_name
  location            = var.location
  size                = var.vm_size
  admin_username      = var.admin_username
  network_interface_ids = [azurerm_network_interface.nic.id]
  admin_ssh_key {
    username   = var.admin_username
    public_key = var.ssh_public_key
  }
  os_disk {
    caching              = "ReadWrite"
    storage_account_type = "Standard_LRS"
  }
  source_image_reference {
    publisher = "Canonical"
    offer     = "0001-com-ubuntu-server-jammy"
    sku       = "22_04-lts-gen2"
    version   = "latest"
  }
}