Fix local conflicts in 'Introduce import alias'

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceImportAlias/KotlinIntroduceImportAliasHandler.kt

@@ -17,6 +17,7 @@ import com.intellij.psi.search.searches.ReferencesSearch
 import com.intellij.refactoring.RefactoringActionHandler
 import com.intellij.refactoring.rename.inplace.VariableInplaceRenamer
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.idea.caches.resolve.analyze
 import org.jetbrains.kotlin.idea.caches.resolve.resolveImportReference
 import org.jetbrains.kotlin.idea.codeInsight.CodeInsightUtils
 import org.jetbrains.kotlin.idea.core.KotlinNameSuggester
@@ -46,6 +47,7 @@ import org.jetbrains.kotlin.psi.psiUtil.getQualifiedElementSelector
 import org.jetbrains.kotlin.psi.psiUtil.siblings
 import org.jetbrains.kotlin.resolve.PropertyImportedFromObject
 import org.jetbrains.kotlin.resolve.descriptorUtil.isExtension
+import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 import org.jetbrains.kotlin.resolve.scopes.utils.findClassifier
 import org.jetbrains.kotlin.resolve.scopes.utils.findPackage
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedClassDescriptor
@@ -70,15 +72,21 @@ object KotlinIntroduceImportAliasHandler : RefactoringActionHandler {
         }
 
         val oldName = element.mainReference.value
-        val scope = file.getResolutionScope()
+        val scopes = usages.mapNotNull {
+            val expression = it.reference.element
+            expression.getResolutionScope(expression.analyze(BodyResolveMode.PARTIAL_FOR_COMPLETION))
+        }.distinct()
+
         val validator = fun(name: String): Boolean {
             if (oldName == name) return false
             val identifier = Name.identifier(name)
 
-            return scope.getAllAccessibleFunctions(identifier).isEmpty()
-                    && scope.getAllAccessibleVariables(identifier).isEmpty()
-                    && scope.findClassifier(identifier, NoLookupLocation.FROM_IDE) == null
-                    && scope.findPackage(identifier) == null
+            return scopes.all { scope ->
+                scope.getAllAccessibleFunctions(identifier).isEmpty()
+                        && scope.getAllAccessibleVariables(identifier).isEmpty()
+                        && scope.findClassifier(identifier, NoLookupLocation.FROM_IDE) == null
+                        && scope.findPackage(identifier) == null
+            }
         }
 
         val suggestionsName = KotlinNameSuggester.suggestNamesByFqName(fqName, validator = validator)

idea/testData/intentions/introduceImportAlias/conflictLocalName2.kt

@@ -0,0 +1,22 @@
+import Outer.Middle.Inner.Companion.foo
+
+class Outer {
+    class Middle {
+        class Inner {
+            companion object {
+                fun foo() {}
+            }
+        }
+    }
+}
+
+class Test() {
+    fun test2() {
+        val foo2 = 42
+        foo()
+    }
+    fun test() {
+        val foo1 = 1
+        foo<caret>()
+    }
+}

idea/testData/intentions/introduceImportAlias/conflictLocalName2.kt.after

@@ -0,0 +1,22 @@
+import Outer.Middle.Inner.Companion.foo as foo3
+
+class Outer {
+    class Middle {
+        class Inner {
+            companion object {
+                fun foo() {}
+            }
+        }
+    }
+}
+
+class Test() {
+    fun test2() {
+        val foo2 = 42
+        foo3()
+    }
+    fun test() {
+        val foo1 = 1
+        foo3()
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -10080,6 +10080,11 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             runTest("idea/testData/intentions/introduceImportAlias/conflictLocalName.kt");
         }
 
+        @TestMetadata("conflictLocalName2.kt")
+        public void testConflictLocalName2() throws Exception {
+            runTest("idea/testData/intentions/introduceImportAlias/conflictLocalName2.kt");
+        }
+
         @TestMetadata("conflictPackage.kt")
         public void testConflictPackage() throws Exception {
             runTest("idea/testData/intentions/introduceImportAlias/conflictPackage.kt");