package azurerm

import (
	"fmt"
	"net/http"
	"testing"

	"github.com/hashicorp/terraform/helper/acctest"
	"github.com/hashicorp/terraform/helper/resource"
	"github.com/hashicorp/terraform/terraform"
)

func TestAccAzureRMVirtualMachine_basicLinuxMachine(t *testing.T) {
	ri := acctest.RandInt()
	config := fmt.Sprintf(testAccAzureRMVirtualMachine_basicLinuxMachine, ri, ri, ri, ri, ri, ri, ri)
	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testCheckAzureRMVirtualMachineDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: config,
				Check: resource.ComposeTestCheckFunc(
					testCheckAzureRMVirtualMachineExists("azurerm_virtual_machine.test"),
				),
			},
		},
	})
}

func TestAccAzureRMVirtualMachine_tags(t *testing.T) {
	ri := acctest.RandInt()
	preConfig := fmt.Sprintf(testAccAzureRMVirtualMachine_basicLinuxMachine, ri, ri, ri, ri, ri, ri, ri)
	postConfig := fmt.Sprintf(testAccAzureRMVirtualMachine_basicLinuxMachineUpdated, ri, ri, ri, ri, ri, ri, ri)
	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testCheckAzureRMVirtualMachineDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: preConfig,
				Check: resource.ComposeTestCheckFunc(
					testCheckAzureRMVirtualMachineExists("azurerm_virtual_machine.test"),
					resource.TestCheckResourceAttr(
						"azurerm_virtual_machine.test", "tags.#", "2"),
					resource.TestCheckResourceAttr(
						"azurerm_virtual_machine.test", "tags.environment", "Production"),
					resource.TestCheckResourceAttr(
						"azurerm_virtual_machine.test", "tags.cost_center", "Ops"),
				),
			},

			resource.TestStep{
				Config: postConfig,
				Check: resource.ComposeTestCheckFunc(
					testCheckAzureRMVirtualMachineExists("azurerm_virtual_machine.test"),
					resource.TestCheckResourceAttr(
						"azurerm_virtual_machine.test", "tags.#", "1"),
					resource.TestCheckResourceAttr(
						"azurerm_virtual_machine.test", "tags.environment", "Production"),
				),
			},
		},
	})
}

//This is a regression test around https://github.com/hashicorp/terraform/issues/6517
//Because we use CreateOrUpdate, we were sending an empty password on update requests
func TestAccAzureRMVirtualMachine_updateMachineSize(t *testing.T) {
	ri := acctest.RandInt()
	preConfig := fmt.Sprintf(testAccAzureRMVirtualMachine_basicLinuxMachine, ri, ri, ri, ri, ri, ri, ri)
	postConfig := fmt.Sprintf(testAccAzureRMVirtualMachine_updatedLinuxMachine, ri, ri, ri, ri, ri, ri, ri)
	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testCheckAzureRMVirtualMachineDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: preConfig,
				Check: resource.ComposeTestCheckFunc(
					testCheckAzureRMVirtualMachineExists("azurerm_virtual_machine.test"),
					resource.TestCheckResourceAttr(
						"azurerm_virtual_machine.test", "vm_size", "Standard_A0"),
				),
			},
			resource.TestStep{
				Config: postConfig,
				Check: resource.ComposeTestCheckFunc(
					testCheckAzureRMVirtualMachineExists("azurerm_virtual_machine.test"),
					resource.TestCheckResourceAttr(
						"azurerm_virtual_machine.test", "vm_size", "Standard_A1"),
				),
			},
		},
	})
}

func TestAccAzureRMVirtualMachine_basicWindowsMachine(t *testing.T) {
	ri := acctest.RandInt()
	config := fmt.Sprintf(testAccAzureRMVirtualMachine_basicWindowsMachine, ri, ri, ri, ri, ri, ri)
	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testCheckAzureRMVirtualMachineDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: config,
				Check: resource.ComposeTestCheckFunc(
					testCheckAzureRMVirtualMachineExists("azurerm_virtual_machine.test"),
				),
			},
		},
	})
}

func testCheckAzureRMVirtualMachineExists(name string) resource.TestCheckFunc {
	return func(s *terraform.State) error {
		// Ensure we have enough information in state to look up in API
		rs, ok := s.RootModule().Resources[name]
		if !ok {
			return fmt.Errorf("Not found: %s", name)
		}

		vmName := rs.Primary.Attributes["name"]
		resourceGroup, hasResourceGroup := rs.Primary.Attributes["resource_group_name"]
		if !hasResourceGroup {
			return fmt.Errorf("Bad: no resource group found in state for virtual machine: %s", vmName)
		}

		conn := testAccProvider.Meta().(*ArmClient).vmClient

		resp, err := conn.Get(resourceGroup, vmName, "")
		if err != nil {
			return fmt.Errorf("Bad: Get on vmClient: %s", err)
		}

		if resp.StatusCode == http.StatusNotFound {
			return fmt.Errorf("Bad: VirtualMachine %q (resource group: %q) does not exist", vmName, resourceGroup)
		}

		return nil
	}
}

func testCheckAzureRMVirtualMachineDestroy(s *terraform.State) error {
	conn := testAccProvider.Meta().(*ArmClient).vmClient

	for _, rs := range s.RootModule().Resources {
		if rs.Type != "azurerm_virtual_machine" {
			continue
		}

		name := rs.Primary.Attributes["name"]
		resourceGroup := rs.Primary.Attributes["resource_group_name"]

		resp, err := conn.Get(resourceGroup, name, "")

		if err != nil {
			return nil
		}

		if resp.StatusCode != http.StatusNotFound {
			return fmt.Errorf("Virtual Machine still exists:\n%#v", resp.Properties)
		}
	}

	return nil
}

var testAccAzureRMVirtualMachine_basicLinuxMachine = `
resource "azurerm_resource_group" "test" {
    name = "acctestrg-%d"
    location = "West US"
}

resource "azurerm_virtual_network" "test" {
    name = "acctvn-%d"
    address_space = ["10.0.0.0/16"]
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"
}

resource "azurerm_subnet" "test" {
    name = "acctsub-%d"
    resource_group_name = "${azurerm_resource_group.test.name}"
    virtual_network_name = "${azurerm_virtual_network.test.name}"
    address_prefix = "10.0.2.0/24"
}

resource "azurerm_network_interface" "test" {
    name = "acctni-%d"
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"

    ip_configuration {
    	name = "testconfiguration1"
    	subnet_id = "${azurerm_subnet.test.id}"
    	private_ip_address_allocation = "dynamic"
    }
}

resource "azurerm_storage_account" "test" {
    name = "accsa%d"
    resource_group_name = "${azurerm_resource_group.test.name}"
    location = "westus"
    account_type = "Standard_LRS"

    tags {
        environment = "staging"
    }
}

resource "azurerm_storage_container" "test" {
    name = "vhds"
    resource_group_name = "${azurerm_resource_group.test.name}"
    storage_account_name = "${azurerm_storage_account.test.name}"
    container_access_type = "private"
}

resource "azurerm_virtual_machine" "test" {
    name = "acctvm-%d"
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"
    network_interface_ids = ["${azurerm_network_interface.test.id}"]
    vm_size = "Standard_A0"

    storage_image_reference {
	publisher = "Canonical"
	offer = "UbuntuServer"
	sku = "14.04.2-LTS"
	version = "latest"
    }

    storage_os_disk {
        name = "myosdisk1"
        vhd_uri = "${azurerm_storage_account.test.primary_blob_endpoint}${azurerm_storage_container.test.name}/myosdisk1.vhd"
        caching = "ReadWrite"
        create_option = "FromImage"
    }

    os_profile {
	computer_name = "hostname%d"
	admin_username = "testadmin"
	admin_password = "Password1234!"
    }

    os_profile_linux_config {
	disable_password_authentication = false
    }

    tags {
    	environment = "Production"
    	cost-center = "Ops"
    }
}
`

var testAccAzureRMVirtualMachine_basicLinuxMachineUpdated = `
resource "azurerm_resource_group" "test" {
    name = "acctestrg-%d"
    location = "West US"
}

resource "azurerm_virtual_network" "test" {
    name = "acctvn-%d"
    address_space = ["10.0.0.0/16"]
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"
}

resource "azurerm_subnet" "test" {
    name = "acctsub-%d"
    resource_group_name = "${azurerm_resource_group.test.name}"
    virtual_network_name = "${azurerm_virtual_network.test.name}"
    address_prefix = "10.0.2.0/24"
}

resource "azurerm_network_interface" "test" {
    name = "acctni-%d"
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"

    ip_configuration {
    	name = "testconfiguration1"
    	subnet_id = "${azurerm_subnet.test.id}"
    	private_ip_address_allocation = "dynamic"
    }
}

resource "azurerm_storage_account" "test" {
    name = "accsa%d"
    resource_group_name = "${azurerm_resource_group.test.name}"
    location = "westus"
    account_type = "Standard_LRS"

    tags {
        environment = "staging"
    }
}

resource "azurerm_storage_container" "test" {
    name = "vhds"
    resource_group_name = "${azurerm_resource_group.test.name}"
    storage_account_name = "${azurerm_storage_account.test.name}"
    container_access_type = "private"
}

resource "azurerm_virtual_machine" "test" {
    name = "acctvm-%d"
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"
    network_interface_ids = ["${azurerm_network_interface.test.id}"]
    vm_size = "Standard_A0"

    storage_image_reference {
	publisher = "Canonical"
	offer = "UbuntuServer"
	sku = "14.04.2-LTS"
	version = "latest"
    }

    storage_os_disk {
        name = "myosdisk1"
        vhd_uri = "${azurerm_storage_account.test.primary_blob_endpoint}${azurerm_storage_container.test.name}/myosdisk1.vhd"
        caching = "ReadWrite"
        create_option = "FromImage"
    }

    os_profile {
	computer_name = "hostname%d"
	admin_username = "testadmin"
	admin_password = "Password1234!"
    }

    os_profile_linux_config {
	disable_password_authentication = false
    }

    tags {
    	environment = "Production"
    }
}
`

var testAccAzureRMVirtualMachine_updatedLinuxMachine = `
resource "azurerm_resource_group" "test" {
    name = "acctestrg-%d"
    location = "West US"
}

resource "azurerm_virtual_network" "test" {
    name = "acctvn-%d"
    address_space = ["10.0.0.0/16"]
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"
}

resource "azurerm_subnet" "test" {
    name = "acctsub-%d"
    resource_group_name = "${azurerm_resource_group.test.name}"
    virtual_network_name = "${azurerm_virtual_network.test.name}"
    address_prefix = "10.0.2.0/24"
}

resource "azurerm_network_interface" "test" {
    name = "acctni-%d"
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"

    ip_configuration {
    	name = "testconfiguration1"
    	subnet_id = "${azurerm_subnet.test.id}"
    	private_ip_address_allocation = "dynamic"
    }
}

resource "azurerm_storage_account" "test" {
    name = "accsa%d"
    resource_group_name = "${azurerm_resource_group.test.name}"
    location = "westus"
    account_type = "Standard_LRS"

    tags {
        environment = "staging"
    }
}

resource "azurerm_storage_container" "test" {
    name = "vhds"
    resource_group_name = "${azurerm_resource_group.test.name}"
    storage_account_name = "${azurerm_storage_account.test.name}"
    container_access_type = "private"
}

resource "azurerm_virtual_machine" "test" {
    name = "acctvm-%d"
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"
    network_interface_ids = ["${azurerm_network_interface.test.id}"]
    vm_size = "Standard_A1"

    storage_image_reference {
	publisher = "Canonical"
	offer = "UbuntuServer"
	sku = "14.04.2-LTS"
	version = "latest"
    }

    storage_os_disk {
        name = "myosdisk1"
        vhd_uri = "${azurerm_storage_account.test.primary_blob_endpoint}${azurerm_storage_container.test.name}/myosdisk1.vhd"
        caching = "ReadWrite"
        create_option = "FromImage"
    }

    os_profile {
	computer_name = "hostname%d"
	admin_username = "testadmin"
	admin_password = "Password1234!"
    }

    os_profile_linux_config {
	disable_password_authentication = false
    }
}
`

var testAccAzureRMVirtualMachine_basicWindowsMachine = `
resource "azurerm_resource_group" "test" {
    name = "acctestrg-%d"
    location = "West US"
}

resource "azurerm_virtual_network" "test" {
    name = "acctvn-%d"
    address_space = ["10.0.0.0/16"]
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"
}

resource "azurerm_subnet" "test" {
    name = "acctsub-%d"
    resource_group_name = "${azurerm_resource_group.test.name}"
    virtual_network_name = "${azurerm_virtual_network.test.name}"
    address_prefix = "10.0.2.0/24"
}

resource "azurerm_network_interface" "test" {
    name = "acctni-%d"
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"

    ip_configuration {
    	name = "testconfiguration1"
    	subnet_id = "${azurerm_subnet.test.id}"
    	private_ip_address_allocation = "dynamic"
    }
}

resource "azurerm_storage_account" "test" {
    name = "accsa%d"
    resource_group_name = "${azurerm_resource_group.test.name}"
    location = "westus"
    account_type = "Standard_LRS"

    tags {
        environment = "staging"
    }
}

resource "azurerm_storage_container" "test" {
    name = "vhds"
    resource_group_name = "${azurerm_resource_group.test.name}"
    storage_account_name = "${azurerm_storage_account.test.name}"
    container_access_type = "private"
}

resource "azurerm_virtual_machine" "test" {
    name = "acctvm-%d"
    location = "West US"
    resource_group_name = "${azurerm_resource_group.test.name}"
    network_interface_ids = ["${azurerm_network_interface.test.id}"]
    vm_size = "Standard_A0"

    storage_image_reference {
	publisher = "MicrosoftWindowsServer"
	offer = "WindowsServer"
	sku = "2012-Datacenter"
	version = "latest"
    }

    storage_os_disk {
        name = "myosdisk1"
        vhd_uri = "${azurerm_storage_account.test.primary_blob_endpoint}${azurerm_storage_container.test.name}/myosdisk1.vhd"
        caching = "ReadWrite"
        create_option = "FromImage"
    }

    os_profile {
	computer_name = "winhost01"
	admin_username = "testadmin"
	admin_password = "Password1234!"
    }

    os_profile_windows_config {
	enable_automatic_upgrades = false
	provision_vm_agent = true
    }
}
`