/*
 * Copyright 2023 The Android Open Source Project
 *
 * 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 androidx.build.clang

import javax.inject.Inject
import org.gradle.api.DefaultTask
import org.gradle.api.file.ConfigurableFileCollection
import org.gradle.api.file.RegularFileProperty
import org.gradle.api.provider.Property
import org.gradle.api.services.ServiceReference
import org.gradle.api.tasks.CacheableTask
import org.gradle.api.tasks.Input
import org.gradle.api.tasks.InputFiles
import org.gradle.api.tasks.Nested
import org.gradle.api.tasks.OutputFile
import org.gradle.api.tasks.PathSensitive
import org.gradle.api.tasks.PathSensitivity
import org.gradle.api.tasks.TaskAction
import org.gradle.workers.WorkAction
import org.gradle.workers.WorkParameters
import org.gradle.workers.WorkerExecutor

@CacheableTask
abstract class ClangArchiveTask @Inject constructor(private val workerExecutor: WorkerExecutor) :
    DefaultTask() {
    init {
        description = "Combines multiple object files (.o) into an archive file (.a)."
        group = "Build"
    }

    @get:ServiceReference(KonanBuildService.KEY)
    abstract val konanBuildService: Property<KonanBuildService>

    @get:Nested abstract val llvmArchiveParameters: ClangArchiveParameters

    @TaskAction
    fun archive() {
        workerExecutor.noIsolation().submit(ClangArchiveWorker::class.java) {
            it.llvmArchiveParameters.set(llvmArchiveParameters)
            it.buildService.set(konanBuildService)
        }
    }
}

abstract class ClangArchiveParameters {
    /** The target platform for the archive file. */
    @get:Input abstract val konanTarget: Property<SerializableKonanTarget>

    /** The list of object files that needs to be added to the archive. */
    @get:InputFiles
    @get:PathSensitive(PathSensitivity.NAME_ONLY)
    abstract val objectFiles: ConfigurableFileCollection

    /** The final output file that will include the archive of the given [objectFiles]. */
    @get:OutputFile abstract val outputFile: RegularFileProperty
}

private abstract class ClangArchiveWorker : WorkAction<ClangArchiveWorker.Params> {
    interface Params : WorkParameters {
        val llvmArchiveParameters: Property<ClangArchiveParameters>
        val buildService: Property<KonanBuildService>
    }

    override fun execute() {
        val buildService = parameters.buildService.get()
        buildService.archiveLibrary(parameters.llvmArchiveParameters.get())
    }
}