/*
 * Copyright 2010-2023 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.fir.declarations

import org.jetbrains.kotlin.fir.FirSession
import org.jetbrains.kotlin.fir.FirSessionComponent
import org.jetbrains.kotlin.fir.symbols.impl.FirCallableSymbol
import org.jetbrains.kotlin.resolve.calls.results.FlatSignature

interface FirDeclarationOverloadabilityHelper : FirSessionComponent {
    fun isConflicting(a: FirCallableSymbol<*>, b: FirCallableSymbol<*>, ignoreContextParameters: Boolean): Boolean

    enum class ContextParameterShadowing {
        None,
        Shadowing,
        BothWays,
    }

    fun getContextParameterShadowing(a: FirCallableSymbol<*>, b: FirCallableSymbol<*>): ContextParameterShadowing

    fun createSignature(declaration: FirCallableSymbol<*>, ignoreContextParameters: Boolean = false): FlatSignature<FirCallableSymbol<*>>
    fun createSignatureForPossiblyShadowedExtension(declaration: FirCallableSymbol<*>): FlatSignature<FirCallableSymbol<*>>

    fun isEquallyOrMoreSpecific(
        sigA: FlatSignature<FirCallableSymbol<*>>,
        sigB: FlatSignature<FirCallableSymbol<*>>,
    ): Boolean
}

val FirSession.declarationOverloadabilityHelper: FirDeclarationOverloadabilityHelper by FirSession.sessionComponentAccessor()
