Fix module resolve issue where modules main class was resolved instead of the module.

Author: m0rkeulv

src/main/java/com/intellij/plugins/haxe/lang/psi/HaxeResolver.java

@@ -2123,9 +2123,22 @@ private List<? extends PsiElement> checkIsType(HaxeReference reference) {
         if(textCanBeQname(maybeQname)) {
           HaxeClass classByQName = HaxeResolveUtil.findClassByQName(maybeQname, reference);
           if(classByQName != null) {
+            // if part of a longer chain, need to check if it is a module or mainclass reference
+            if(referenceExpression.getParent() instanceof HaxeReferenceExpression expression) {
+              HaxeModuleModel module = classByQName.getModel().getModule();
+              HaxeClassModel classModel = module.getMainClass();
+              if(classModel != null && classModel.haxeClass == classByQName) {
+                HaxeBaseMemberModel member = module.getMember(expression.getIdentifier().getText(), null);
+                if (member != null) {
+                  // if the parent reference is a member of the module, we return the module instead of the class
+                  LogResolution(reference, "via fully qualified module name.");
+                  return List.of(module.module);
+                }
+              }
+            }
             HaxeComponentName componentName = classByQName.getComponentName();
             if(componentName != null) {
-              LogResolution(reference, "via fully qualified name.");
+              LogResolution(reference, "via fully qualified class name.");
               return List.of(componentName);
             }
           }

src/main/java/com/intellij/plugins/haxe/model/HaxeModuleModel.java

@@ -126,6 +126,7 @@ public HaxeBaseMemberModel getMember(String name, @Nullable HaxeGenericResolver
     return HaxeBaseMemberModel.fromPsi(match);
   }
 
+  @Nullable
   public HaxeClassModel getClass(String name) {
     if(name == null) return null;
     List<HaxeNamedComponent> allNamedComponents = getAllHaxeNamedComponents(HaxeComponentType.CLASS );
@@ -150,6 +151,7 @@ public List<HaxeClassModel> getClasses() {
     return HaxeNamedSubComponentUtil.filterNamedComponentsByType(allNamedComponents, componentType);
   }
 
+  @Nullable
     public HaxeClassModel getMainClass() {
         return getClass(getName());
     }

src/test/resources/testData/resolve/modules/ModuleImport.hx

@@ -5,7 +5,7 @@ import other.OtherModule;
 class <info descr="null">ModuleImportTest</info> {
     public function <info descr="null">new</info>() {
         // should resolve (FQN)
-        <info descr="null">modules.ModuleWithMainClass</info>.<info descr="null">moduleAFunction</info>();
+        modules.ModuleWithMainClass.<info descr="null">moduleAFunction</info>();
         modules.ModuleWithoutMainClass.<info descr="null">moduleBFunction</info>();
 
         // should resolve (wildcard import)