import java.io.File
import java.util.Properties

plugins {
    alias(libs.plugins.android.application)
    alias(libs.plugins.kotlin.compose)
    alias(libs.plugins.kotlin.serialization)
    alias(libs.plugins.screenshot)
}

// 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
    }
    // README screenshots, rendered from previews without an emulator:
    // ./gradlew :app:updateDebugScreenshotTest (src/screenshotTest).
    experimentalProperties["android.experimental.enableScreenshotTest"] = true
    sourceSets["main"].jniLibs.directories.add(rustJniLibs.get().asFile.path)
    sourceSets["main"].kotlin.directories.add(rustBindings.get().asFile.path)
}

dependencies {
    implementation(libs.jna) { artifact { type = "aar" } }
    implementation(platform(libs.androidx.compose.bom))
    implementation(libs.androidx.activity.compose)
    implementation(libs.androidx.compose.material3)
    implementation(libs.androidx.compose.material3.navigation.suite)
    implementation(libs.androidx.compose.material3.adaptive)
    implementation(libs.androidx.compose.material3.adaptive.layout)
    implementation(libs.androidx.compose.material3.adaptive.navigation)
    implementation(libs.androidx.compose.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)
    implementation(libs.androidx.lifecycle.runtime.compose)
    implementation(libs.androidx.lifecycle.viewmodel.compose)
    implementation(libs.androidx.navigation.compose)
    implementation(libs.kotlinx.serialization.json)
    implementation(libs.kotlinx.coroutines.android)
    implementation(libs.okhttp)
    testImplementation(libs.junit)
    testImplementation(libs.kotlinx.coroutines.test)
    testImplementation(libs.okhttp.mockwebserver)
    androidTestImplementation(platform(libs.androidx.compose.bom))
    androidTestImplementation(libs.androidx.compose.ui.test.junit4)
    androidTestImplementation(libs.androidx.espresso.core)
    androidTestImplementation(libs.androidx.junit)
    screenshotTestImplementation(libs.screenshot.validation.api)
    screenshotTestImplementation(libs.androidx.compose.ui.tooling)
    screenshotTestImplementation(libs.kotlinx.coroutines.test)
    debugImplementation(libs.androidx.compose.ui.test.manifest)
    debugImplementation(libs.androidx.compose.ui.tooling)
}