/*
 * Copyright 2010-2015 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.kotlin.idea.intentions

import com.intellij.openapi.editor.Editor
import org.jetbrains.kotlin.psi.KtLambdaExpression
import org.jetbrains.kotlin.psi.KtPsiFactory
import org.jetbrains.kotlin.psi.psiUtil.endOffset

class RemoveExplicitLambdaParameterTypesIntention : SelfTargetingIntention<KtLambdaExpression>(KtLambdaExpression::class.java, "Remove explicit lambda parameter types (may break code)") {
    override fun isApplicableTo(element: KtLambdaExpression, caretOffset: Int): Boolean {
        if (element.valueParameters.none { it.typeReference != null }) return false
        val arrow = element.functionLiteral.arrow ?: return false
        return caretOffset <= arrow.endOffset
    }

    override fun applyTo(element: KtLambdaExpression, editor: Editor?) {
        val oldParameterList = element.functionLiteral.valueParameterList!!

        val parameterString = oldParameterList.parameters.asSequence().map {
            it.destructuringDeclaration?.text ?: it.name
        }.joinToString(", ")
        val newParameterList = KtPsiFactory(element).createLambdaParameterList(parameterString)
        oldParameterList.replace(newParameterList)
    }
}
