package linode

import (
	"strconv"
	"testing"

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

func testConfig() map[string]interface{} {
	return map[string]interface{}{
		"linode_token":  "bar",
		"region":        "us-east",
		"instance_type": "g6-nanode-1",
		"ssh_username":  "root",
		"image":         "linode/alpine3.9",
	}
}

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{}{
		"linode_token": []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 := "us-east"

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

	expected := "g6-nanode-1"

	// Test set
	config["instance_type"] = 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.InstanceType != expected {
		t.Errorf("found %s, expected %s", b.config.InstanceType, 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 := "linode/alpine3.9"

	// 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_ImageLabel(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.ImageLabel == "" {
		t.Errorf("invalid: %s", b.config.ImageLabel)
	}

	// Test set
	config["image_label"] = "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["image_label"] = "{{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.ImageLabel, 0, 0)
	if err != nil {
		t.Fatalf("failed to parse int in template: %s", err)
	}

}

func TestBuilderPrepare_Label(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.Label == "" {
		t.Errorf("invalid: %s", b.config.Label)
	}

	// Test normal set
	config["instance_label"] = "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["instance_label"] = "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["instance_label"] = "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")
	}

}