package clc

import (
	"fmt"
	"strings"
	"testing"

	clc "github.com/CenturyLinkCloud/clc-sdk"
	"github.com/CenturyLinkCloud/clc-sdk/server"
	"github.com/hashicorp/terraform/helper/resource"
	"github.com/hashicorp/terraform/terraform"
)

// things to test:
//   basic crud
//   modify specs
//   power operations
//   add'l disks
//   custom fields? (skip)

func TestAccServerBasic(t *testing.T) {
	var resp server.Response
	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testAccCheckServerDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: testAccCheckServerConfigBasic,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckServerExists("clc_server.acc_test_server", &resp),
					resource.TestCheckResourceAttr(
						"clc_server.acc_test_server", "name_template", "test"),
					resource.TestCheckResourceAttr(
						"clc_server.acc_test_server", "cpu", "1"),
					resource.TestCheckResourceAttr(
						"clc_server.acc_test_server", "memory_mb", "1024"),
				),
			},
			// update simple attrs
			resource.TestStep{
				Config: testAccCheckServerConfigCPUMEM,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckServerExists("clc_server.acc_test_server", &resp),
					resource.TestCheckResourceAttr(
						"clc_server.acc_test_server", "cpu", "2"),
					resource.TestCheckResourceAttr(
						"clc_server.acc_test_server", "memory_mb", "2048"),
					resource.TestCheckResourceAttr(
						"clc_server.acc_test_server", "password", "Green123$"),
					testAccCheckServerUpdatedSpec("clc_server.acc_test_server", &resp),
				),
			},
			// toggle power
			resource.TestStep{
				Config: testAccCheckServerConfigPower,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckServerExists("clc_server.acc_test_server", &resp),
					resource.TestCheckResourceAttr(
						"clc_server.acc_test_server", "power_state", "stopped"),
				),
			},
			/* // currently broken since disk updates require diskId
			// add disks
			resource.TestStep{
				Config: testAccCheckServerConfig_disks,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckServerExists("clc_server.acc_test_server", &resp),
					// power still off
					resource.TestCheckResourceAttr(
						"clc_server.acc_test_server", "power_state", "stopped"),
					testAccCheckServerUpdatedDisks("clc_server.acc_test_server", &resp),
				),
			},
			*/
			/* // broken since network id is a (account-specific) guid
			// set network id
			resource.TestStep{
				Config: testAccCheckServerConfigNetwork,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckServerExists("clc_server.acc_test_server", &resp),
					resource.TestCheckResourceAttr(
						"clc_server.acc_test_server", "network_id", "15a0f669c332435ebf375e010ac79fbb"),
					testAccCheckServerUpdatedSpec("clc_server.acc_test_server", &resp),
				),
			},
			*/
		},
	})
}

func testAccCheckServerDestroy(s *terraform.State) error {
	client := testAccProvider.Meta().(*clc.Client)

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

		_, err := client.Server.Get(rs.Primary.ID)

		if err == nil {
			return fmt.Errorf("Server still exists")
		}
	}

	return nil
}

func testAccCheckServerExists(n string, resp *server.Response) resource.TestCheckFunc {
	return func(s *terraform.State) error {
		rs, ok := s.RootModule().Resources[n]
		if !ok {
			return fmt.Errorf("Not found: %s", n)
		}
		if rs.Primary.ID == "" {
			return fmt.Errorf("No server ID is set")
		}

		client := testAccProvider.Meta().(*clc.Client)
		srv, err := client.Server.Get(rs.Primary.ID)
		if err != nil {
			return err
		}

		if strings.ToUpper(srv.ID) != rs.Primary.ID {
			return fmt.Errorf("Server not found")
		}
		*resp = *srv
		return nil
	}
}

func testAccCheckServerUpdatedSpec(n string, resp *server.Response) resource.TestCheckFunc {
	return func(s *terraform.State) error {
		rs, ok := s.RootModule().Resources[n]
		if !ok {
			return fmt.Errorf("Not found: %s", n)
		}
		client := testAccProvider.Meta().(*clc.Client)
		srv, err := client.Server.Get(rs.Primary.ID)
		if err != nil {
			return err
		}
		cpu := srv.Details.CPU
		mem := srv.Details.MemoryMB
		scpu := fmt.Sprintf("%v", cpu)
		smem := fmt.Sprintf("%v", mem)
		excpu := rs.Primary.Attributes["cpu"]
		exmem := rs.Primary.Attributes["memory_mb"]
		if scpu != excpu {
			return fmt.Errorf("Expected CPU to be %v but found %v", excpu, scpu)
		}
		if smem != exmem {
			return fmt.Errorf("Expected MEM to be %v but found %v", exmem, smem)
		}
		return nil
	}
}

func testAccCheckServerUpdatedDisks(n string, resp *server.Response) resource.TestCheckFunc {
	return func(s *terraform.State) error {
		rs, ok := s.RootModule().Resources[n]
		if !ok {
			return fmt.Errorf("Not found: %s", n)
		}
		client := testAccProvider.Meta().(*clc.Client)
		srv, err := client.Server.Get(rs.Primary.ID)
		if err != nil {
			return err
		}

		if len(srv.Details.Disks) <= 3 {
			return fmt.Errorf("Expected total of > 3 drives. found: %v", len(srv.Details.Disks))
		}

		return nil
	}
}

const testAccCheckServerConfigBasic = `
variable "dc" { default = "IL1" }

resource "clc_group" "acc_test_group_server" {
  location_id	= "${var.dc}"
  name		= "acc_test_group_server"
  parent	= "Default Group"
}

resource "clc_server" "acc_test_server" {
  name_template		= "test"
  source_server_id	= "UBUNTU-14-64-TEMPLATE"
  group_id		= "${clc_group.acc_test_group_server.id}"
  cpu			= 1
  memory_mb		= 1024
  password		= "Green123$"
}
`

const testAccCheckServerConfigCPUMEM = `
variable "dc" { default = "IL1" }

resource "clc_group" "acc_test_group_server" {
  location_id	= "${var.dc}"
  name		= "acc_test_group_server"
  parent	= "Default Group"
}

resource "clc_server" "acc_test_server" {
  name_template		= "test"
  source_server_id	= "UBUNTU-14-64-TEMPLATE"
  group_id		= "${clc_group.acc_test_group_server.id}"
  cpu			= 2
  memory_mb		= 2048
  password		= "Green123$"
  power_state		= "started"
}
`

const testAccCheckServerConfigPower = `
variable "dc" { default = "IL1" }

resource "clc_group" "acc_test_group_server" {
  location_id	= "${var.dc}"
  name		= "acc_test_group_server"
  parent	= "Default Group"
}

resource "clc_server" "acc_test_server" {
  name_template		= "test"
  source_server_id	= "UBUNTU-14-64-TEMPLATE"
  group_id		= "${clc_group.acc_test_group_server.id}"
  cpu			= 2
  memory_mb		= 2048
  password		= "Green123$"
  power_state		= "stopped"
}
`

const testAccCheckServerConfigDisks = `
variable "dc" { default = "IL1" }

resource "clc_group" "acc_test_group_server" {
  location_id	= "${var.dc}"
  name		= "acc_test_group_server"
  parent	= "Default Group"
}

resource "clc_server" "acc_test_server" {
  name_template		= "test"
  source_server_id	= "UBUNTU-14-64-TEMPLATE"
  group_id		= "${clc_group.acc_test_group_server.id}"
  cpu			= 2
  memory_mb		= 2048
  password		= "Green123$"
  power_state		= "stopped"
  # network_id = "15a0f669c332435ebf375e010ac79fbb"
  additional_disks
    {
      path = "/data1"
      size_gb = 100
      type = "partitioned"
    }

}
`