gradle-tools/src/main/kotlin/scientifik/ScientifikJVMPlugin.kt

package scientifik

import Scientifik
import org.gradle.api.Plugin
import org.gradle.api.Project
import org.gradle.api.plugins.JavaBasePlugin
import org.gradle.api.plugins.JavaPluginExtension
import org.gradle.api.publish.PublishingExtension
import org.gradle.api.publish.maven.MavenPublication
import org.gradle.api.tasks.Copy
import org.gradle.api.tasks.bundling.Jar
import org.gradle.api.tasks.testing.Test
import org.gradle.kotlin.dsl.*
import org.jetbrains.dokka.gradle.DokkaTask
import org.jetbrains.kotlin.gradle.dsl.KotlinJvmProjectExtension
import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

open class ScientifikJVMPlugin : Plugin<Project> {
    override fun apply(project: Project): Unit = project.run {
        plugins.apply("org.jetbrains.kotlin.jvm")

        repositories.applyRepos()

        extensions.findByType<JavaPluginExtension>()?.apply {
            targetCompatibility = Scientifik.JVM_TARGET
        }

        tasks.withType<KotlinCompile> {
            kotlinOptions {
                jvmTarget = Scientifik.JVM_TARGET.toString()
            }
        }

        configure<KotlinJvmProjectExtension> {

            val sourceSet = sourceSets["main"].apply {
                languageSettings.applySettings()
                dependencies {
                    api(kotlin("stdlib-jdk8"))
                }
            }

            sourceSets["test"].apply {
                languageSettings.applySettings()
                dependencies {
                    implementation(kotlin("test"))
//                        implementation(kotlin("test-junit"))
                    implementation(kotlin("test-junit5"))
                    implementation("org.junit.jupiter:junit-jupiter:5.6.1")
                }
            }

            val sourcesJar by tasks.registering(Jar::class) {
                archiveClassifier.set("sources")
                from(sourceSet.kotlin.srcDirs.first())
            }

            pluginManager.withPlugin("maven-publish") {

                configure<PublishingExtension> {
                    publications {
                        register("jvm", MavenPublication::class) {
                            from(components["java"])
                            artifact(sourcesJar.get())
                        }
                    }
                }

                pluginManager.withPlugin("org.jetbrains.dokka") {
                    logger.info("Adding dokka functionality to project ${project.name}")

                    val dokka by tasks.getting(DokkaTask::class) {
                        outputFormat = "html"
                        outputDirectory = "$buildDir/javadoc"
                    }

                    val kdocJar by tasks.registering(Jar::class) {
                        group = JavaBasePlugin.DOCUMENTATION_GROUP
                        dependsOn(dokka)
                        archiveClassifier.set("javadoc")
                        from("$buildDir/javadoc")
                    }

                    configure<PublishingExtension> {
                        publications {
                            getByName("jvm") {
                                this as MavenPublication
                                artifact(kdocJar.get())
                            }
                        }
                    }
                }
            }
        }

        tasks.apply {
            withType<Test>() {
                useJUnitPlatform()
            }

            val processResources by getting(Copy::class)
            processResources.copyJVMResources(configurations["runtimeClasspath"])
        }
    }

}