variable "azure_private_key_path" {
  default = "/home/student/.ssh/azure"
}

data "local_file" "azure_private_key" {
  filename = var.azure_private_key_path
}

# Azure

resource "azurerm_virtual_network" "main" {
  name                = "${var.prefix}-network"
  address_space       = ["10.0.0.0/16"]
  location            = var.azure_location
  resource_group_name = var.azure_resourcegroup
}

resource "azurerm_subnet" "main" {
  name                 = "internal"
  resource_group_name  = var.azure_resourcegroup
  virtual_network_name = azurerm_virtual_network.main.name
  address_prefixes     = ["10.0.2.0/24"]
}

resource "azurerm_network_security_group" "main" {
  name                = "${var.prefix}-nsg"
  location            = var.azure_location
  resource_group_name = var.azure_resourcegroup
  security_rule {
    access                     = "Allow"
    direction                  = "Inbound"
    name                       = "tls"
    priority                   = 100
    protocol                   = "Tcp"
    source_port_range          = "*"
    source_address_prefix      = "*"
    destination_port_range     = "22"
    destination_address_prefix = "*"
  }
}

resource "azurerm_subnet_network_security_group_association" "nsg_link" {
  subnet_id                 = azurerm_subnet.main.id
  network_security_group_id = azurerm_network_security_group.main.id
}

#webserver 1
resource "azurerm_public_ip" "webserver" {
  name                = "${var.prefix}-webserver-pip"
  resource_group_name = var.azure_resourcegroup
  location            = var.azure_location
  allocation_method   = "Static"
}

resource "azurerm_network_interface" "webserver" {
  name                = "${var.prefix}-webserver-nic"
  location            = var.azure_location
  resource_group_name = var.azure_resourcegroup

  ip_configuration {
    name                          = "internal"
    subnet_id                     = azurerm_subnet.main.id
    private_ip_address_allocation = "Dynamic"
    public_ip_address_id          = azurerm_public_ip.webserver.id
  }
}

resource "azurerm_linux_virtual_machine" "webserver" {
  name                = "${var.prefix}-webserver-vm"
  location            = var.azure_location
  resource_group_name = var.azure_resourcegroup
  network_interface_ids = [
    azurerm_network_interface.webserver.id,
  ]
  size = "Standard_B2ats_v2"

  admin_username = "adminuser"
  admin_ssh_key {
    username   = "adminuser"
    public_key = data.azurerm_ssh_public_key.azure.public_key
  }

  os_disk {
    caching              = "ReadWrite"
    storage_account_type = "Standard_LRS"
  }

  source_image_reference {
    publisher = "Canonical"
    offer     = "ubuntu-24_04-lts"
    sku       = "server"
    version   = "latest"
  }
}

#databaseserver
resource "azurerm_public_ip" "databaseserver" {
  name                = "${var.prefix}-databaseserver-pip"
  resource_group_name = var.azure_resourcegroup
  location            = var.azure_location
  allocation_method   = "Static"
}

resource "azurerm_network_interface" "databaseserver" {
  name                = "${var.prefix}-databaseserver-nic"
  location            = var.azure_location
  resource_group_name = var.azure_resourcegroup

  ip_configuration {
    name                          = "internal"
    subnet_id                     = azurerm_subnet.main.id
    private_ip_address_allocation = "Dynamic"
    public_ip_address_id          = azurerm_public_ip.databaseserver.id
  }
}

resource "azurerm_linux_virtual_machine" "databaseserver" {
  name                = "${var.prefix}-databaseserver-vm"
  location            = var.azure_location
  resource_group_name = var.azure_resourcegroup
  network_interface_ids = [
    azurerm_network_interface.databaseserver.id,
  ]
  size = "Standard_B2ats_v2"

  admin_username = "adminuser"
  admin_ssh_key {
    username   = "adminuser"
    public_key = data.azurerm_ssh_public_key.azure.public_key
  }

  os_disk {
    caching              = "ReadWrite"
    storage_account_type = "Standard_LRS"
  }

  source_image_reference {
    publisher = "Canonical"
    offer     = "ubuntu-24_04-lts"
    sku       = "server"
    version   = "latest"
  }
}


locals {
  webservers = [
    {
      name             = azurerm_linux_virtual_machine.webserver.name
      ip               = azurerm_linux_virtual_machine.webserver.public_ip_address
      private_key_file = var.azure_private_key_path
    }
  ]
}

locals {
  databaseservers = [
    {
      name             = azurerm_linux_virtual_machine.databaseserver.name
      ip               = azurerm_linux_virtual_machine.databaseserver.public_ip_address
      private_key_file = var.azure_private_key_path
    }
  ]
}


locals {
  inventory = templatefile("${path.module}/ansible-inventory.tmpl", {
    webservers      = local.webservers
    databaseservers = local.databaseservers
  })
}


resource "local_file" "ansible_inventory" {
  content  = local.inventory
  filename = "${path.module}/inventory.ini"
}


output "ip_addresses" {
  value = local_file.ansible_inventory.content
}