package common

import (
	"reflect"
	"testing"
)

func testAMIConfig() *AMIConfig {
	return &AMIConfig{
		AMIName: "foo",
	}
}

func TestAMIConfigPrepare_name(t *testing.T) {
	c := testAMIConfig()
	if err := c.Prepare(nil); err != nil {
		t.Fatalf("shouldn't have err: %s", err)
	}

	c.AMIName = ""
	if err := c.Prepare(nil); err == nil {
		t.Fatal("should have error")
	}
}

func TestAMIConfigPrepare_regions(t *testing.T) {
	c := testAMIConfig()
	c.AMIRegions = nil
	if err := c.Prepare(nil); err != nil {
		t.Fatalf("shouldn't have err: %s", err)
	}

	c.AMIRegions = listEC2Regions()
	if err := c.Prepare(nil); err != nil {
		t.Fatalf("shouldn't have err: %s", err)
	}

	c.AMIRegions = []string{"foo"}
	if err := c.Prepare(nil); err == nil {
		t.Fatal("should have error")
	}

	c.AMIRegions = []string{"us-east-1", "us-west-1", "us-east-1"}
	if err := c.Prepare(nil); err != nil {
		t.Fatalf("bad: %s", err)
	}

	expected := []string{"us-east-1", "us-west-1"}
	if !reflect.DeepEqual(c.AMIRegions, expected) {
		t.Fatalf("bad: %#v", c.AMIRegions)
	}

	c.AMIRegions = []string{"custom"}
	c.AMISkipRegionValidation = true
	if err := c.Prepare(nil); err != nil {
		t.Fatal("shouldn't have error")
	}
	c.AMISkipRegionValidation = false

	c.AMIRegions = []string{"us-east-1", "us-east-2", "us-west-1"}
	c.AMIRegionKMSKeyIDs = map[string]string{
		"us-east-1": "123-456-7890",
		"us-west-1": "789-012-3456",
		"us-east-2": "456-789-0123",
	}
	if err := c.Prepare(nil); err != nil {
		t.Fatal("shouldn't have error")
	}

	c.AMIRegions = []string{"us-east-1", "us-east-2", "us-west-1"}
	c.AMIRegionKMSKeyIDs = map[string]string{
		"us-east-1": "123-456-7890",
		"us-west-1": "789-012-3456",
		"us-east-2": "",
	}
	if err := c.Prepare(nil); err != nil {
		t.Fatal("should have passed; we are able to use default KMS key if not sharing")
	}

	c.SnapshotUsers = []string{"user-foo", "user-bar"}
	c.AMIRegions = []string{"us-east-1", "us-east-2", "us-west-1"}
	c.AMIRegionKMSKeyIDs = map[string]string{
		"us-east-1": "123-456-7890",
		"us-west-1": "789-012-3456",
		"us-east-2": "",
	}
	if err := c.Prepare(nil); err == nil {
		t.Fatal("should have an error b/c can't use default KMS key if sharing")
	}

	c.AMIRegions = []string{"us-east-1", "us-west-1"}
	c.AMIRegionKMSKeyIDs = map[string]string{
		"us-east-1": "123-456-7890",
		"us-west-1": "789-012-3456",
		"us-east-2": "456-789-0123",
	}
	if err := c.Prepare(nil); err == nil {
		t.Fatal("should have error b/c theres a region in the key map that isn't in ami_regions")
	}

	c.AMIRegions = []string{"us-east-1", "us-west-1", "us-east-2"}
	c.AMIRegionKMSKeyIDs = map[string]string{
		"us-east-1": "123-456-7890",
		"us-west-1": "789-012-3456",
	}
	if err := c.Prepare(nil); err == nil {
		t.Fatal("should have error b/c theres a region in in ami_regions that isn't in the key map")
	}

	c.SnapshotUsers = []string{"foo", "bar"}
	c.AMIKmsKeyId = "123-abc-456"
	c.AMIEncryptBootVolume = true
	c.AMIRegions = []string{"us-east-1", "us-west-1"}
	c.AMIRegionKMSKeyIDs = map[string]string{
		"us-east-1": "123-456-7890",
		"us-west-1": "",
	}
	if err := c.Prepare(nil); err == nil {
		t.Fatal("should have error b/c theres a region in in ami_regions that isn't in the key map")
	}
}

func TestAMIConfigPrepare_Share_EncryptedBoot(t *testing.T) {
	c := testAMIConfig()
	c.AMIUsers = []string{"testAccountID"}
	c.AMIEncryptBootVolume = true

	c.AMIKmsKeyId = ""
	if err := c.Prepare(nil); err == nil {
		t.Fatal("shouldn't be able to share ami with encrypted boot volume")
	}

	c.AMIKmsKeyId = "89c3fb9a-de87-4f2a-aedc-fddc5138193c"
	if err := c.Prepare(nil); err == nil {
		t.Fatal("shouldn't be able to share ami with encrypted boot volume")
	}
}

func TestAMINameValidation(t *testing.T) {
	c := testAMIConfig()

	c.AMIName = "aa"
	if err := c.Prepare(nil); err == nil {
		t.Fatal("shouldn't be able to have an ami name with less than 3 characters")
	}

	var longAmiName string
	for i := 0; i < 129; i++ {
		longAmiName += "a"
	}
	c.AMIName = longAmiName
	if err := c.Prepare(nil); err == nil {
		t.Fatal("shouldn't be able to have an ami name with great than 128 characters")
	}

	c.AMIName = "+aaa"
	if err := c.Prepare(nil); err == nil {
		t.Fatal("shouldn't be able to have an ami name with invalid characters")
	}

	c.AMIName = "fooBAR1()[] ./-'@_"
	if err := c.Prepare(nil); err != nil {
		t.Fatal("should be able to use all of the allowed AMI characters")
	}

	c.AMIName = `xyz-base-2017-04-05-1934`
	if err := c.Prepare(nil); err != nil {
		t.Fatalf("expected `xyz-base-2017-04-05-1934` to pass validation.")
	}

}