package digitalocean

import (
	"strconv"
	"testing"
	"time"

	"github.com/hashicorp/packer/packer"
)

func testConfig() map[string]interface{} {
	return map[string]interface{}{
		"api_token":    "bar",
		"region":       "nyc2",
		"size":         "512mb",
		"ssh_username": "root",
		"image":        "foo",
	}
}

func TestBuilder_ImplementsBuilder(t *testing.T) {
	var raw interface{}
	raw = &Builder{}
	if _, ok := raw.(packer.Builder); !ok {
		t.Fatalf("Builder should be a builder")
	}
}

func TestBuilder_Prepare_BadType(t *testing.T) {
	b := &Builder{}
	c := map[string]interface{}{
		"api_key": []string{},
	}

	_, warnings, err := b.Prepare(c)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatalf("prepare should fail")
	}
}

func TestBuilderPrepare_InvalidKey(t *testing.T) {
	var b Builder
	config := testConfig()

	// Add a random key
	config["i_should_not_be_valid"] = true
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatal("should have error")
	}
}

func TestBuilderPrepare_Region(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test default
	delete(config, "region")
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatalf("should error")
	}

	expected := "sfo1"

	// Test set
	config["region"] = expected
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if b.config.Region != expected {
		t.Errorf("found %s, expected %s", b.config.Region, expected)
	}
}

func TestBuilderPrepare_Size(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test default
	delete(config, "size")
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatalf("should error")
	}

	expected := "1024mb"

	// Test set
	config["size"] = expected
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if b.config.Size != expected {
		t.Errorf("found %s, expected %s", b.config.Size, expected)
	}
}

func TestBuilderPrepare_Image(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test default
	delete(config, "image")
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatal("should error")
	}

	expected := "ubuntu-14-04-x64"

	// Test set
	config["image"] = expected
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if b.config.Image != expected {
		t.Errorf("found %s, expected %s", b.config.Image, expected)
	}
}

func TestBuilderPrepare_StateTimeout(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test default
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if b.config.StateTimeout != 6*time.Minute {
		t.Errorf("invalid: %s", b.config.StateTimeout)
	}

	// Test set
	config["state_timeout"] = "5m"
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	// Test bad
	config["state_timeout"] = "tubes"
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatal("should have error")
	}
}

func TestBuilderPrepare_SnapshotTimeout(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test default
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if b.config.SnapshotTimeout != 60*time.Minute {
		t.Errorf("invalid: %s", b.config.SnapshotTimeout)
	}

	// Test set
	config["snapshot_timeout"] = "15m"
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	// Test bad
	config["snapshot_timeout"] = "badstring"
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatal("should have error")
	}
}

func TestBuilderPrepare_PrivateNetworking(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test default
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if b.config.PrivateNetworking != false {
		t.Errorf("invalid: %t", b.config.PrivateNetworking)
	}

	// Test set
	config["private_networking"] = true
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if b.config.PrivateNetworking != true {
		t.Errorf("invalid: %t", b.config.PrivateNetworking)
	}
}

func TestBuilderPrepare_SnapshotName(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test default
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if b.config.SnapshotName == "" {
		t.Errorf("invalid: %s", b.config.SnapshotName)
	}

	// Test set
	config["snapshot_name"] = "foobarbaz"
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	// Test set with template
	config["snapshot_name"] = "{{timestamp}}"
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	_, err = strconv.ParseInt(b.config.SnapshotName, 0, 0)
	if err != nil {
		t.Fatalf("failed to parse int in template: %s", err)
	}

}

func TestBuilderPrepare_DropletName(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test default
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if b.config.DropletName == "" {
		t.Errorf("invalid: %s", b.config.DropletName)
	}

	// Test normal set
	config["droplet_name"] = "foobar"
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	// Test with template
	config["droplet_name"] = "foobar-{{timestamp}}"
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	// Test with bad template
	config["droplet_name"] = "foobar-{{"
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatal("should have error")
	}

}

func TestBuilderPrepare_VPCUUID(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test with the case vpc_uuid is defined but private_networking is not enabled
	config["vpc_uuid"] = "554c41b3-425f-5403-8860-7f24fb108098"
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatalf("should have error: 'private networking should be enabled to use vpc_uuid'")
	}

	// Test with the case both vpc_uuid and private_networking are defined/enabled
	config["private_networking"] = true
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatal("should not have error")
	}
}

func TestBuilderPrepare_ConnectWithPrivateIP(t *testing.T) {
	var b Builder
	config := testConfig()

	// Test with the case connect_with_private_ip is defined but private_networking is not enabled
	config["connect_with_private_ip"] = true
	_, warnings, err := b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err == nil {
		t.Fatalf("should have error: 'private networking should be enabled to use connect_with_private_ip'")
	}

	// Test with the case both connect_with_private_ip and private_networking are enabled
	config["private_networking"] = true
	b = Builder{}
	_, warnings, err = b.Prepare(config)
	if len(warnings) > 0 {
		t.Fatalf("bad: %#v", warnings)
	}
	if err != nil {
		t.Fatal("should not have error")
	}
}