# Azure Virtual Network Module Template

variable "address_space" {
  description = "VNet address space"
  type        = list(string)
  default     = ["10.0.0.0/16"]
}

# Virtual Network
resource "azurerm_virtual_network" "main" {
  name                = "${var.project_name}-${var.environment}-vnet"
  location            = azurerm_resource_group.main.location
  resource_group_name = azurerm_resource_group.main.name
  address_space       = var.address_space

  tags = local.common_tags
}

# Public Subnet
resource "azurerm_subnet" "public" {
  name                 = "public-subnet"
  resource_group_name  = azurerm_resource_group.main.name
  virtual_network_name = azurerm_virtual_network.main.name
  address_prefixes     = ["10.0.1.0/24"]
}

# Private Subnet
resource "azurerm_subnet" "private" {
  name                 = "private-subnet"
  resource_group_name  = azurerm_resource_group.main.name
  virtual_network_name = azurerm_virtual_network.main.name
  address_prefixes     = ["10.0.2.0/24"]
}

# AKS Subnet
resource "azurerm_subnet" "aks" {
  name                 = "aks-subnet"
  resource_group_name  = azurerm_resource_group.main.name
  virtual_network_name = azurerm_virtual_network.main.name
  address_prefixes     = ["10.0.10.0/23"]
}

# Network Security Group
resource "azurerm_network_security_group" "main" {
  name                = "${var.project_name}-${var.environment}-nsg"
  location            = azurerm_resource_group.main.location
  resource_group_name = azurerm_resource_group.main.name

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

  tags = local.common_tags
}

# NSG Association
resource "azurerm_subnet_network_security_group_association" "public" {
  subnet_id                 = azurerm_subnet.public.id
  network_security_group_id = azurerm_network_security_group.main.id
}

output "vnet_id" {
  value = azurerm_virtual_network.main.id
}

output "subnet_ids" {
  value = {
    public  = azurerm_subnet.public.id
    private = azurerm_subnet.private.id
    aks     = azurerm_subnet.aks.id
  }
}