import java.io.File

import java.util.Properties

plugins {

    alias(libs.plugins.android.application)

    alias(libs.plugins.kotlin.compose)

}

// The Rust core (rust-core/, over oxy-core) is built for the app's ABIs by

// cargo-ndk and its Kotlin bindings generated by uniffi at build time

// (oxygenhub-android#1): nothing built is kept in the repository.

val rustCore: File = rootProject.file("rust-core")

val rustJniLibs = layout.buildDirectory.dir("rustJniLibs")

val rustBindings = layout.buildDirectory.dir("generated/uniffi/kotlin")

fun androidNdk(): String {

    System.getenv("ANDROID_NDK_HOME")?.let { return it }

    val props = Properties()

    val local = rootProject.file("local.properties")

    if (local.exists()) local.inputStream().use { input -> props.load(input) }

    val sdk = props.getProperty("sdk.dir") ?: System.getenv("ANDROID_HOME")

        ?: error("set sdk.dir in local.properties or ANDROID_HOME")

    val ndks = File(sdk, "ndk").listFiles()?.filter { f -> f.isDirectory }?.sortedBy { f -> f.name }.orEmpty()

    return ndks.lastOrNull()?.path ?: error("no NDK under $sdk/ndk: install one with the SDK manager")

}

val buildRustCore = tasks.register("buildRustCore", Exec::class) {

    description = "Builds rust-core for arm64-v8a and x86_64 with cargo-ndk."

    workingDir = rustCore

    inputs.dir(rustCore.resolve("src"))

    inputs.files(rustCore.resolve("Cargo.toml"), rustCore.resolve("Cargo.lock"))

    outputs.dir(rustJniLibs)

    environment("ANDROID_NDK_HOME", androidNdk())

    commandLine("cargo", "ndk", "-t", "arm64-v8a", "-t", "x86_64", "--platform", "31", "-o", rustJniLibs.get().asFile.path, "build", "--release")

}

val generateRustBindings = tasks.register("generateRustBindings", Exec::class) {

    description = "Generates rust-core's Kotlin bindings with uniffi."

    dependsOn(buildRustCore)

    workingDir = rustCore

    inputs.dir(rustJniLibs)

    outputs.dir(rustBindings)

    commandLine(

        "cargo", "run", "--release", "--bin", "uniffi-bindgen", "generate",

        "--library", rustJniLibs.get().file("arm64-v8a/librust_core.so").asFile.path,

        "--language", "kotlin", "--out-dir", rustBindings.get().asFile.path,

    )

}

tasks.named("preBuild") { dependsOn(generateRustBindings) }

android {

    namespace = "io.oxygenhub.android"

    compileSdk {

        version = release(37)

    }

    defaultConfig {

        applicationId = "io.oxygenhub.android"

        minSdk = 31

        targetSdk = 37

        versionCode = 1

        versionName = "1.0"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"

    }

    buildTypes {

        release {

            optimization {

                enable = false

            }

        }

    }

    compileOptions {

        sourceCompatibility = JavaVersion.VERSION_11

        targetCompatibility = JavaVersion.VERSION_11

    }

    packaging {

        jniLibs {

            useLegacyPackaging = true

        }

    }

    buildFeatures {

        compose = true

    }

    sourceSets["main"].jniLibs.directories.add(rustJniLibs.get().asFile.path)

    sourceSets["main"].kotlin.directories.add(rustBindings.get().asFile.path)

}

dependencies {

    implementation("net.java.dev.jna:jna:5.17.0@aar")

    implementation(platform(libs.androidx.compose.bom))

    implementation(libs.androidx.activity.compose)

    implementation(libs.androidx.compose.material3)

    implementation("androidx.compose.material:material-icons-extended")

    implementation(libs.androidx.compose.ui)

    implementation(libs.androidx.compose.ui.graphics)

    implementation(libs.androidx.compose.ui.tooling.preview)

    implementation(libs.androidx.core.ktx)

    implementation(libs.androidx.lifecycle.runtime.ktx)

    testImplementation(libs.junit)

    androidTestImplementation(platform(libs.androidx.compose.bom))

    androidTestImplementation(libs.androidx.compose.ui.test.junit4)

    androidTestImplementation(libs.androidx.espresso.core)

    androidTestImplementation(libs.androidx.junit)

    debugImplementation(libs.androidx.compose.ui.test.manifest)

    debugImplementation(libs.androidx.compose.ui.tooling)

}