buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath libraries.android_tools
    }
}

description = 'Conscrypt: Android Benchmarks'

ext {
    androidHome = "$System.env.ANDROID_HOME"
    androidSdkInstalled = file("$androidHome").exists()
    androidVersionCode = 1
    androidVersionName = "$version"
    androidMinSdkVersion = 26
    androidTargetSdkVersion = 26
}

if (androidSdkInstalled) {
    apply plugin: 'com.android.library'

    android {
        compileSdkVersion androidTargetSdkVersion

        compileOptions {
            sourceCompatibility androidMinJavaVersion
            targetCompatibility androidMinJavaVersion
        }

        defaultConfig {
            minSdkVersion androidMinSdkVersion
            targetSdkVersion androidTargetSdkVersion
            versionCode androidVersionCode
            versionName androidVersionName
        }
        lintOptions {
            // Some Caliper classes reference packages that don't exist on Android
            disable 'InvalidPackage'
        }
        sourceSets.main {
            java {
                srcDirs = [
                        "src/main/java"
                ]
            }
        }
    }

    configurations {
        // For the depsJar task, we need to create a config we can pull libraries from to
        // make the complete JAR. Some we do not want the transitive dependencies because
        // they are already included on the Android system.
        depsJarApi
        depsJarApi.transitive = true

        depsJarImplementation
        depsJarImplementation.transitive = false

        implementation.extendsFrom(depsJarApi)
        implementation.extendsFrom(depsJarImplementation)
    }

    dependencies {
        depsJarApi project(path: ':conscrypt-android'),
                   libraries.bouncycastle_provider,
                   libraries.bouncycastle_apis

        depsJarImplementation project(':conscrypt-benchmark-base'),
                              project(path: ":conscrypt-testing", configuration: "runtime"),
                              project(':conscrypt-libcore-stub')

        implementation 'com.google.caliper:caliper:1.0-beta-2'
    }

    // This task bundles up everything we're going to send to the device into a single jar.
    // We need to include all the Conscrypt code plus the Bouncy Castle jar because the platform
    // version of Bouncy Castle is jarjared.
    //
    // Since we're examining the contents of the archive files, we need to prevent evaluation of
    // the .aar and .jar contents before the actual archives are built. To do this we create a
    // configure task where the "from" contents is set inside a doLast stanza to ensure it is run
    // after the execution phase of the "assemble" task.
    def configureDepsJar = tasks.register("configureDepsJar") {
        dependsOn assemble, \
                  configurations.depsJarApi.artifacts, \
                  configurations.depsJarImplementation.artifacts
        doLast {
            depsJar.from {
                [
                    configurations.depsJarApi,
                    configurations.depsJarImplementation,
                    configurations.archives.artifacts.file
                ].collect { config ->
                    config.findResults { archive ->
                        // For Android library archives (.aar), we need to expand the classes.jar
                        // inside as well as including all the jni libraries.
                        if (archive.name.endsWith(".aar")) {
                            [
                                zipTree(archive).matching {
                                    include 'classes.jar'
                                }.collect { file ->
                                    zipTree(file)
                                },
                                zipTree(archive).matching {
                                    include '**/*.so'
                                }
                            ]
                        } else if (archive.name.endsWith(".jar")) {
                            // Bouncy Castle signs their jar, which causes our combined jar to fail
                            // to verify.  Just strip out the signature files.
                            zipTree(archive).matching {
                                exclude 'META-INF/*.SF'
                                exclude 'META-INF/*.DSA'
                                exclude 'META-INF/*.EC'
                                exclude 'META-INF/*.RSA'
                            }
                        }
                    }
                }
            }
        }
    }

    def depsJar = tasks.register("depsJar", Jar) {
        dependsOn configureDepsJar
        archiveName = 'bundled-deps.jar'
    }

    def getAndroidDeviceAbi = tasks.register("getAndroidDeviceAbi") {
        doLast {
            new ByteArrayOutputStream().withStream { os ->
                def result = exec {
                    executable android.adbExecutable
                    args 'shell', 'getprop', 'ro.product.cpu.abi'
                    standardOutput = os
                }
                project.ext.androidDeviceAbi = os.toString().trim()
                project.ext.androidDevice64Bit = androidDeviceAbi.contains('64')
            }
        }
    }

    def configureExtractNativeLib = tasks.register("configureExtractNativeLib") {
        dependsOn getAndroidDeviceAbi, depsJar
        doLast {
            extractNativeLib.from {
                zipTree(depsJar.archivePath).matching {
                    include "jni/${androidDeviceAbi}/*.so"
                }.collect {
                    // Using collect flattens out the directory.
                    it
                }
            }
        }
    }

    def extractNativeLib = tasks.register("extractNativeLib", Copy) {
        dependsOn configureExtractNativeLib
        into "$buildDir/extracted-native-libs"
    }

    def configurePushNativeLibrary = tasks.register("configurePushNativeLibrary") {
        dependsOn extractNativeLib
        doLast {
            project.ext.nativeLibPath = "/system/lib${androidDevice64Bit ? '64' : ''}/libconscrypt_jni.so"
            pushNativeLibrary.args 'push', "${extractNativeLib.destinationDir}/libconscrypt_jni.so", nativeLibPath
        }
    }

    def pushNativeLibrary = tasks.register("pushNativeLibrary", Exec) {
        dependsOn configurePushNativeLibrary
        pushNativeLibrary.executable android.adbExecutable
    }

    def runBenchmarks = tasks.register("runBenchmarks") {
        dependsOn depsJar, pushNativeLibrary
        doLast {
            // Execute the benchmarks
            exec {
                workingDir "${rootDir}"
                environment PATH: "${android.sdkDirectory}/build-tools/${android.buildToolsVersion}:$System.env.PATH"
                environment JACK_JAR: "${android.sdkDirectory}/build-tools/${android.buildToolsVersion}/jack.jar"

                executable 'java'
                args '-cp', 'benchmark-android/vogar.jar', 'vogar.Vogar'
                args '--classpath', depsJar.archivePath
                args '--benchmark'
                args '--language=JN'
                args '--mode=app_process'
                args 'org.conscrypt.CaliperAlpnBenchmark'
                args 'org.conscrypt.CaliperClientSocketBenchmark'
                args 'org.conscrypt.CaliperEngineHandshakeBenchmark'
                args 'org.conscrypt.CaliperEngineWrapBenchmark'
            }
            // Clean up the native library
            exec {
                executable android.adbExecutable
                args 'shell', 'rm', '-f', nativeLibPath
            }
        }
    }
} else {
    logger.warn('Android SDK has not been detected. The Android Benchmark module will not be built.')

    // Disable all tasks
    tasks.configureEach {
        it.enabled = false
    }
}