interpolator: Now interpolation compares with Lowcase values (#356)

CHANGELOG.md

@@ -7,6 +7,11 @@
 - Azurerm `azurerm_network_security_group.security_rule.protocol` now has the right format
   ([PR #357](https://github.com/cycloidio/terracognita/pull/357))
 
+### Changed
+
+- Interpolation now will compare value lowcasing them beforehand
+  ([PR #356](https://github.com/cycloidio/terracognita/pull/356))
+
 ## [0.8.2] _2023-03-07_
 
 ### Added

azurerm/provider.go

@@ -271,7 +271,6 @@ func (a *azurerm) FixResource(t string, v cty.Value) (cty.Value, error) {
 		if err != nil {
 			return v, errors.Wrapf(err, "failed to convert CTY value to GO type")
 		}
-
 	case "azurerm_windows_virtual_machine":
 		v, err = cty.Transform(v, func(path cty.Path, v cty.Value) (cty.Value, error) {
 			if len(path) > 0 {

interpolator/interpolator.go

@@ -111,14 +111,14 @@ func (i *Interpolator) Interpolate(k, v string) (string, bool) {
 func (i *Interpolator) checkAttributes(sk []string, v string, ngi int, ng string, rns map[string]map[string]string) string {
 	for rn, attrs := range rns {
 		att := strings.Join(sk[(len(sk)-(ngi)):len(sk)], "_")
-		if av, ok := attrs[att]; ok && av == v {
+		if av, ok := attrs[att]; ok && strings.ToLower(av) == strings.ToLower(v) {
 			return fmt.Sprintf("${%s.%s.%s}", fmt.Sprintf("%s_%s", i.provider, ng), rn, att)
 		}
 	}
 	// Then if no exact we try to find first one with the same value on the resource
 	for rn, attrs := range rns {
 		for ak, av := range attrs {
-			if av == v {
+			if strings.ToLower(av) == strings.ToLower(v) {
 				return fmt.Sprintf("${%s.%s.%s}", fmt.Sprintf("%s_%s", i.provider, ng), rn, ak)
 			}
 		}