/*
 * Copyright 2017 the original author or authors.
 *
 * 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.gradle.integtests.composite

import org.gradle.test.fixtures.file.TestFile

class CompositeBuildArtifactTransformIntegrationTest extends AbstractCompositeBuildIntegrationTest {

    def "can apply a transform to the outputs of included builds"() {
        def buildB = singleProjectBuild("buildB") {
            buildFile << """
                apply plugin: 'java'
            """
        }
        def buildC = singleProjectBuild("buildC") {
            buildFile << """
                apply plugin: 'java'
            """
        }
        includedBuilds << buildB
        includedBuilds << buildC

        buildA.buildFile << """
            import org.gradle.api.artifacts.transform.TransformParameters

            abstract class XForm implements TransformAction<TransformParameters.None> {
                @InputArtifact
                abstract Provider<FileSystemLocation> getInputArtifact()

                void transform(TransformOutputs outputs) {
                    def input = inputArtifact.get().asFile
                    File outputFile = outputs.file(input.name + ".xform")
                    def outputDirectory = outputFile.parentFile
                    println("Transforming \$input in output directory \$outputDirectory")
                    java.nio.file.Files.copy(input.toPath(), outputFile.toPath())
                }
            }

            dependencies {
                implementation 'org.test:buildB:1.2'
                implementation 'org.test:buildC:1.2'

                registerTransform(XForm) {
                    from.attribute(Attribute.of("artifactType", String), "jar")
                    to.attribute(Attribute.of("artifactType", String), "xform")
                }
            }

            task resolve {
                def artifacts = configurations.compileClasspath.incoming.artifactView {
                    attributes.attribute(Attribute.of("artifactType", String), "xform")
                }.artifacts
                inputs.files artifacts.artifactFiles
                doLast {
                    artifacts.each {
                        println "Transformed artifact: \$it, location: \${it.file.absolutePath}"
                    }
                }
            }
        """
        expect:
        execute(buildA, "resolve")
        assertTaskExecuted(":buildB", ":jar")
        assertTaskExecuted(":buildC", ":jar")

        outputContains("Transformed artifact: buildB-1.0.jar.xform (project :buildB), location: ${expectedWorkspaceLocation(buildB)}")
        outputContains("Transformed artifact: buildC-1.0.jar.xform (project :buildC), location: ${expectedWorkspaceLocation(buildC)}")
        output.count("Transforming") == 2
    }

    def "cross-build dependency with with transform in another build"() {
        given:
        def buildB = multiProjectBuild('buildB', ['app', 'lib'])
        buildB.buildFile << """
            subprojects {
                apply plugin: "java-library"
            }
            class FileSizer extends ArtifactTransform {
                List<File> transform(File input) {
                    def output = new File(outputDirectory, input.name + '.txt')
                    output.text = String.valueOf(input.length())
                    return [output]
                }
            }
            def artifactType = Attribute.of('artifactType', String)
            project(':app') {
                dependencies {
                    implementation(project(':lib'))
                    registerTransform {
                        from.attribute(artifactType, 'jar')
                        to.attribute(artifactType, 'size')
                        artifactTransform(FileSizer)
                    }
                }
                task resolve(type: Copy) {
                    from configurations.runtimeClasspath.incoming.artifactView {
                        attributes { it.attribute(artifactType, 'size') }
                    }.artifacts.artifactFiles
                    into "\$buildDir/libs"
                }
            }
        """
        includedBuilds << buildB

        buildA.buildFile << """
            task run {
                dependsOn gradle.includedBuild('buildB').task(':app:resolve')
            }
        """

        when:
        execute(buildA, 'run')

        then:
        assertTaskExecuted(':buildB', ':lib:compileJava')
        assertTaskExecuted(':buildB', ':lib:classes')
        assertTaskExecuted(':buildB', ':lib:jar')
        assertTaskExecuted(':buildB', ':app:resolve')
        assertTaskExecuted(':', ':run')
    }


    private String expectedWorkspaceLocation(TestFile includedBuild) {
        includedBuild.file("build/.transforms")
    }
}
