# Resource Group
resource "azurerm_resource_group" "rg" {
  location = var.resource_group_location
  name     = "${random_pet.prefix.id}-rg"
}

# Virtual Network
resource "azurerm_virtual_network" "my_terraform_network" {
  name                = "${random_pet.prefix.id}-vnet"
  address_space       = ["10.0.0.0/16"]
  location            = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name
}

# Subnet
resource "azurerm_subnet" "my_terraform_subnet" {
  name                 = "${random_pet.prefix.id}-subnet"
  resource_group_name  = azurerm_resource_group.rg.name
  virtual_network_name = azurerm_virtual_network.my_terraform_network.name
  address_prefixes     = ["10.0.1.0/24"]
}

# Public IP
resource "azurerm_public_ip" "my_terraform_public_ip" {
  name                = "${random_pet.prefix.id}-public-ip"
  location            = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name
  allocation_method   = "Dynamic"
}

# Network Security Group and rules
resource "azurerm_network_security_group" "my_terraform_nsg" {
  name                = "${random_pet.prefix.id}-nsg"
  location            = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name

  security_rule {
    name                       = "RDP"
    priority                   = 1000
    direction                  = "Inbound"
    access                     = "Allow"
    protocol                   = "*"
    source_port_range          = "*"
    destination_port_range     = "3389"
    source_address_prefix      = "*"
    destination_address_prefix = "*"
  }

  security_rule {
    name                       = "web"
    priority                   = 1001
    direction                  = "Inbound"
    access                     = "Allow"
    protocol                   = "Tcp"
    source_port_range          = "*"
    destination_port_range     = "80"
    source_address_prefix      = "*"
    destination_address_prefix = "*"
  }
}

# Network Interface
resource "azurerm_network_interface" "my_terraform_nic" {
  name                = "${random_pet.prefix.id}-nic"
  location            = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name

  ip_configuration {
    name                          = "my_nic_configuration"
    subnet_id                     = azurerm_subnet.my_terraform_subnet.id
    private_ip_address_allocation = "Dynamic"
    public_ip_address_id          = azurerm_public_ip.my_terraform_public_ip.id
  }
}

# Connect the security group to the network interface
resource "azurerm_network_interface_security_group_association" "example" {
  network_interface_id      = azurerm_network_interface.my_terraform_nic.id
  network_security_group_id = azurerm_network_security_group.my_terraform_nsg.id
}

# Storage account for boot diagnostics
resource "azurerm_storage_account" "my_storage_account" {
  name                     = "diag${random_id.random_id.hex}"
  location                 = azurerm_resource_group.rg.location
  resource_group_name      = azurerm_resource_group.rg.name
  account_tier             = "Standard"
  account_replication_type = "LRS"
}

# Virtual Machine
resource "azurerm_windows_virtual_machine" "main" {
  name                  = "${var.prefix}-vm"
  admin_username        = "azureuser"
  admin_password        = random_password.password.result
  location              = azurerm_resource_group.rg.location
  resource_group_name   = azurerm_resource_group.rg.name
  network_interface_ids = [azurerm_network_interface.my_terraform_nic.id]
  size                  = "Standard_DS1_v2"

  os_disk {
    name                 = "myOsDisk"
    caching              = "ReadWrite"
    storage_account_type = "Premium_LRS"
  }

  source_image_reference {
    publisher = "MicrosoftWindowsServer"
    offer     = "WindowsServer"
    sku       = "2022-datacenter-azure-edition"
    version   = "latest"
  }

  boot_diagnostics {
    storage_account_uri = azurerm_storage_account.my_storage_account.primary_blob_endpoint
  }
}


# Azure Automation Account
resource "azurerm_automation_account" "example" {
  name                = "${random_pet.prefix.id}-automation-account"
  location            = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name
  sku_name            = "Basic"
}

# PowerShell Runbook
resource "azurerm_automation_runbook" "example" {
  name                    = "${random_pet.prefix.id}-runbook"
  location                = azurerm_resource_group.rg.location
  resource_group_name     = azurerm_resource_group.rg.name
  automation_account_name = azurerm_automation_account.example.name
  log_verbose             = "true"
  log_progress            = "true"
  description             = "This is an example runbook"
  runbook_type            = "PowerShell"

  publish_content_link {
    uri = "https://raw.githubusercontent.com/azureautomation/runbooks/master/Utility/ASM/Set-AzureScheduleWithRunbook.ps1"
  }
}

# One-time schedule for the runbook
resource "azurerm_automation_schedule" "one_time" {
  name                    = "${random_pet.prefix.id}-one-time-schedule"
  resource_group_name     = azurerm_resource_group.rg.name
  automation_account_name = azurerm_automation_account.example.name
  frequency               = "OneTime"
  start_time              = timeadd(timestamp(), "10m") # 10 minutes from now
}

# Hourly schedule for the runbook
resource "azurerm_automation_schedule" "hourly" {
  name                    = "${random_pet.prefix.id}-hourly-schedule"
  resource_group_name     = azurerm_resource_group.rg.name
  automation_account_name = azurerm_automation_account.example.name
  frequency               = "Hour"
  interval                = 1
  start_time              = timeadd(timestamp(), "15m") # 15 minutes from now
}


# Link the one-time schedule to the runbook
resource "azurerm_automation_job_schedule" "one_time" {
  resource_group_name     = azurerm_resource_group.rg.name
  automation_account_name = azurerm_automation_account.example.name
  schedule_name           = azurerm_automation_schedule.one_time.name
  runbook_name            = azurerm_automation_runbook.example.name
}

# Link the hourly schedule to the runbook
resource "azurerm_automation_job_schedule" "hourly" {
  resource_group_name     = azurerm_resource_group.rg.name
  automation_account_name = azurerm_automation_account.example.name
  schedule_name           = azurerm_automation_schedule.hourly.name
  runbook_name            = azurerm_automation_runbook.example.name
}

# Random resources for unique naming
resource "random_id" "random_id" {
  keepers = {
    resource_group = azurerm_resource_group.rg.name
  }
  byte_length = 8
}

resource "random_password" "password" {
  length      = 20
  min_lower   = 1
  min_upper   = 1
  min_numeric = 1
  min_special = 1
  special     = true
}

resource "random_pet" "prefix" {
  prefix = var.prefix
  length = 1
}