import org.gradle.internal.os.OperatingSystem

val includeAndroid = System.getProperty("includeAndroid")?.toBoolean() ?: true

if (includeAndroid) {
    evaluationDependsOn(":jni:android")
}

val currentOs = OperatingSystem.current()
val bash = "bash"

val buildSecp256k1 by tasks.creating { group = "build" }

val buildSecp256k1Host by tasks.creating(Exec::class) {
    group = "build"
    buildSecp256k1.dependsOn(this)

    val target = when {
        currentOs.isLinux -> "linux"
        currentOs.isMacOsX -> "darwin"
        currentOs.isWindows -> "mingw"
        else -> error("Unsupported OS $currentOs")
    }

    inputs.files(projectDir.resolve("build.sh"))
    outputs.dir(projectDir.resolve("build/$target"))

    workingDir = projectDir
    environment("TARGET", target)
    commandLine(bash, "-l", "build.sh")
}

val buildSecp256k1Ios by tasks.creating(Exec::class) {
    group = "build"
    buildSecp256k1.dependsOn(this)

    onlyIf { currentOs.isMacOsX }

    inputs.files(projectDir.resolve("build-ios.sh"))
    outputs.dir(projectDir.resolve("build/ios"))

    workingDir = projectDir
    commandLine(bash, "build-ios.sh")
}

if (includeAndroid) {

    val buildSecp256k1Android by tasks.creating {
        group = "build"
        buildSecp256k1.dependsOn(this)
    }

    fun creatingBuildSecp256k1Android(arch: String) = tasks.creating(Exec::class) {
        group = "build"
        buildSecp256k1Android.dependsOn(this)

        inputs.files(projectDir.resolve("build-android.sh"))
        outputs.dir(projectDir.resolve("build/android/$arch"))

        workingDir = projectDir

        val toolchain = when {
            currentOs.isLinux -> "linux-x86_64"
            currentOs.isMacOsX -> "darwin-x86_64"
            currentOs.isWindows -> "windows-x86_64"
            else -> error("No Android toolchain defined for this OS: $currentOs")
        }
        environment("TOOLCHAIN", toolchain)
        environment("ARCH", arch)
        environment("ANDROID_NDK", (project(":jni:android").extensions["android"] as com.android.build.gradle.LibraryExtension).ndkDirectory)
        commandLine(bash, "build-android.sh")
    }

    val buildSecp256k1AndroidX86_64 by creatingBuildSecp256k1Android("x86_64")
    val buildSecp256k1AndroidX86 by creatingBuildSecp256k1Android("x86")
    val buildSecp256k1AndroidArm64v8a by creatingBuildSecp256k1Android("arm64-v8a")
    val buildSecp256k1AndroidArmeabiv7a by creatingBuildSecp256k1Android("armeabi-v7a")
}

val clean by tasks.creating {
    group = "build"
    doLast {
        delete(projectDir.resolve("build"))
    }
}