/*
 * Copyright 2000-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
 * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
 */

package org.jetbrains.kotlin.resolve.calls.smartcasts

import org.jetbrains.kotlin.KtNodeTypes
import org.jetbrains.kotlin.builtins.KotlinBuiltIns
import org.jetbrains.kotlin.config.LanguageVersionSettings
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
import org.jetbrains.kotlin.descriptors.ModuleDescriptor
import org.jetbrains.kotlin.descriptors.VariableDescriptor
import org.jetbrains.kotlin.lexer.KtTokens
import org.jetbrains.kotlin.psi.*
import org.jetbrains.kotlin.resolve.BindingContext
import org.jetbrains.kotlin.resolve.calls.context.ResolutionContext
import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
import org.jetbrains.kotlin.resolve.scopes.receivers.ExpressionReceiver
import org.jetbrains.kotlin.resolve.scopes.receivers.ImplicitReceiver
import org.jetbrains.kotlin.resolve.scopes.receivers.ReceiverValue
import org.jetbrains.kotlin.resolve.scopes.receivers.TransientReceiver
import org.jetbrains.kotlin.types.KotlinType
import org.jetbrains.kotlin.types.expressions.ExpressionTypingUtils
import org.jetbrains.kotlin.types.isError

// Please, avoid using this implementation explicitly. If you need DataFlowValueFactory, use injection.
class DataFlowValueFactoryImpl constructor(private val languageVersionSettings: LanguageVersionSettings) : DataFlowValueFactory {
    // Receivers
    override fun createDataFlowValue(
        receiverValue: ReceiverValue,
        resolutionContext: ResolutionContext<*>
    ) = createDataFlowValue(receiverValue, resolutionContext.trace.bindingContext, resolutionContext.scope.ownerDescriptor)

    override fun createDataFlowValue(
        receiverValue: ReceiverValue,
        bindingContext: BindingContext,
        containingDeclarationOrModule: DeclarationDescriptor
    ) = when (receiverValue) {
        is TransientReceiver, is ImplicitReceiver -> createDataFlowValueForStableReceiver(receiverValue)
        is ExpressionReceiver -> createDataFlowValue(
            receiverValue.expression,
            receiverValue.getType(),
            bindingContext,
            containingDeclarationOrModule
        )
        else -> throw UnsupportedOperationException("Unsupported receiver value: " + receiverValue::class.java.name)
    }

    override fun createDataFlowValueForStableReceiver(receiver: ReceiverValue) =
