import org.jetbrains.kotlin.analysis.utils.errors.unexpectedElementError
import org.jetbrains.kotlin.builtins.KotlinBuiltIns
import org.jetbrains.kotlin.builtins.StandardNames
import org.jetbrains.kotlin.builtins.functions.FunctionClassDescriptor
import org.jetbrains.kotlin.descriptors.*
import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
import org.jetbrains.kotlin.descriptors.annotations.AnnotationUseSiteTarget

     *         <element>
     *       }
     *       companion object { // scope3  ClassId = Other.Inner.Companion
     *       }
     *     }
     *   }
     *
     * This function determines the distance based on [ClassId].
     */
    private fun FirScope.isScopeForClassCloserThanAnotherScopeForClass(another: FirScope, from: KtClassOrObject): Boolean {
        // Make sure both are scopes for classes

    override val descriptor: FunctionDescriptor? by cached {
        val bindingContext = analysisContext.analyze(psi, AnalysisMode.PARTIAL)
        bindingContext[BindingContext.FUNCTION, psi]
    }

    override val valueParameters: List<KtValueParameterSymbol>
        get() = withValidityAssertion { psi.valueParameters.map { KtFe10PsiValueParameterSymbol(it, analysisContext) } }

        variableReference: VariableReference,
        constructor: (KtParameterSymbol) -> T
    ): T = constructor(variableReference.descriptor.toKtSymbol(analysisContext) as KtParameterSymbol)

    // Util function to avoid hard coding names of the classes. Type inference will do a better job figuring out the best type to cast to.
    // This visitor isn't type-safe anyway

            else -> null
        }
    }

    private fun provideSourceForInvokeFunction(function: FirSimpleFunction): PsiElement? {
        val classId = function.containingClassLookupTag()?.classId ?: return null
        val classOrObject = classByClassId(classId, function.llFirSession.ktModule) ?: return null
        return classOrObject.declarations.singleOrNull()
    }

            else -> analysisContext.builtIns.getFunction(parameterCount)
        }

        val errorMessage = "Descriptor not found for function \"${declaration.name}\""
        return ErrorUtils.createErrorType(ErrorTypeKind.NOT_FOUND_DESCRIPTOR_FOR_FUNCTION, function.typeConstructor, errorMessage)
            .toKtType(analysisContext)
    }

    override fun getExpectedType(expression: PsiElement): KtType? {

        val generatedTopLevelClassifiers = declarationGenerators
            .asSequence()
            .flatMap {
                // FIXME this function should be called only once during plugin's lifetime, so this usage is not really correct (2)
                it.getTopLevelClassIds()
            }
            .filter { it.packageFqName == packageFqName }

                scopeSession,
                stubBodyResolveTransformer,
                stubBodyResolveTransformer.context,
            )

        // TODO: this doesn't guarantee that the same synthetic function (as a SAM constructor) is created/returned
        fun getSamConstructor(firClass: FirRegularClass): FirSimpleFunction? {
            val samConstructor = bodyResolveComponents.samResolver.getSamConstructor(firClass) ?: return null

  }

  @Test
  @TestMetadata("callableReference_function.kt")
  public void testCallableReference_function() {
    runTest("analysis/analysis-api/testData/components/expressionTypeProvider/expectedExpressionType/callableReference_function.kt");
  }

  @Test
  @TestMetadata("conditionInWhenWithSubject.kt")
  public void testConditionInWhenWithSubject() {

  }

  @Test
  @TestMetadata("function_body_with_if.kt")
  public void testFunction_body_with_if() {
    runTest("analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/function_body_with_if.kt");
  }

  @Test
  @TestMetadata("function_equal_block_with_if.kt")
  public void testFunction_equal_block_with_if() {