import java.net.URI
import java.security.MessageDigest
import org.gradle.api.tasks.bundling.Zip

plugins {
    java
}

group = "games.dmg"
version = providers.gradleProperty("releaseVersion").orElse("0.1.0-SNAPSHOT").get()
val pluginVersion = version.toString()

repositories {
    mavenCentral()
    maven("https://repo.purpurmc.org/snapshots/")
}

java {
    toolchain {
        languageVersion = JavaLanguageVersion.of(25)
    }
}

tasks.withType<JavaCompile>().configureEach {
    options.compilerArgs.addAll(listOf("-Xlint:all,-deprecation,-removal", "-Werror"))
}

dependencies {
    compileOnly("org.purpurmc.purpur:purpur-api:26.3.build.2651-stable")
    compileOnly("net.dmulloy2:ProtocolLib:5.4.0")
    testImplementation("net.dmulloy2:ProtocolLib:5.4.0")
    testImplementation("org.purpurmc.purpur:purpur-api:26.3.build.2651-stable")
    testImplementation(platform("org.junit:junit-bom:5.13.4"))
    testImplementation("org.junit.jupiter:junit-jupiter")
    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
}

val resourcePackInput = layout.buildDirectory.dir("generated/resource-pack-input")
val prepareResourcePack = tasks.register<Copy>("prepareResourcePack") {
    from("src/resourcePack")
    into(resourcePackInput)
    filesMatching("pack.mcmeta") { expand("version" to pluginVersion) }
}
val sheetResourcePack = tasks.register<Zip>("sheetResourcePack") {
    dependsOn(prepareResourcePack)
    from(resourcePackInput)
    archiveFileName.set("purpur-fantasy-stick-$pluginVersion-resource-pack.zip")
    destinationDirectory.set(layout.buildDirectory.dir("distributions"))
    isPreserveFileTimestamps = false
    isReproducibleFileOrder = true
}
val resourcePackMetadata = layout.buildDirectory.dir("generated/resource-pack-metadata")
val generateResourcePackMetadata = tasks.register("generateResourcePackMetadata") {
    dependsOn(sheetResourcePack)
    inputs.file(sheetResourcePack.flatMap { it.archiveFile })
    inputs.property("pluginVersion", pluginVersion)
    outputs.file(resourcePackMetadata.map { it.file("sheet-resource-pack.properties") })
    doLast {
        val pack = sheetResourcePack.get().archiveFile.get().asFile
        val sha1 = MessageDigest.getInstance("SHA-1").digest(pack.readBytes()).joinToString("") { "%02x".format(it) }
        val version = pluginVersion
        val output = resourcePackMetadata.get().file("sheet-resource-pack.properties").asFile
        output.parentFile.mkdirs()
        output.writeText("url=https://git.garvis.dev/dmg/purpur-fantasy-stick/releases/download/v$version/purpur-fantasy-stick-$version-resource-pack.zip\nsha1=$sha1\n")
    }
}
sourceSets.main.get().resources.srcDir(resourcePackMetadata)

tasks.test {
    useJUnitPlatform()
    dependsOn(tasks.jar, sheetResourcePack)
    systemProperty("distribution.jar", tasks.jar.get().archiveFile.get().asFile.absolutePath)
    systemProperty("distribution.version", pluginVersion)
    systemProperty("resource.pack.zip", sheetResourcePack.get().archiveFile.get().asFile.absolutePath)
}

// Patch the exact supported runtime for non-listening native API tests, as in Purpur Base.
val nativeRuntime = layout.buildDirectory.dir("native-runtime")
val downloadNativeRuntime = tasks.register("downloadNativeRuntime") {
    val launcher = nativeRuntime.map { it.file("purpur-26.3-2651.jar") }
    outputs.file(launcher)
    doLast {
        val file = launcher.get().asFile
        file.parentFile.mkdirs()
        val connection = URI("https://api.purpurmc.org/v2/purpur/26.3/2651/download").toURL().openConnection()
        connection.connectTimeout = 30_000
        connection.readTimeout = 120_000
        val bytes = connection.getInputStream().use { it.readBytes() }
        val digest = MessageDigest.getInstance("SHA-256").digest(bytes).joinToString("") { "%02x".format(it) }
        check(digest == "0677c1febecfbc2e5b0a7f76abd647b70a1f38d3cbdf3dd6a82e401b4262a598") {
            "Purpur 2651 checksum mismatch"
        }
        file.writeBytes(bytes)
    }
}
val prepareNativeRuntime = tasks.register<JavaExec>("prepareNativeRuntime") {
    dependsOn(downloadNativeRuntime)
    javaLauncher = javaToolchains.launcherFor { languageVersion = JavaLanguageVersion.of(25) }
    classpath = files(nativeRuntime.map { it.file("purpur-26.3-2651.jar") })
    mainClass = "io.papermc.paperclip.Main"
    jvmArgs("-Dpaperclip.patchonly=true")
    workingDir(nativeRuntime)
    outputs.dir(nativeRuntime.map { it.dir("versions") })
    outputs.dir(nativeRuntime.map { it.dir("libraries") })
}
val nativeTest = sourceSets.create("nativeTest")
dependencies {
    add(nativeTest.implementationConfigurationName, platform("org.junit:junit-bom:5.13.4"))
    add(nativeTest.implementationConfigurationName, "org.junit.jupiter:junit-jupiter")
    add(nativeTest.implementationConfigurationName, "net.dmulloy2:ProtocolLib:5.4.0")
    add(nativeTest.implementationConfigurationName, "org.mockito:mockito-core:5.18.0")
    add(nativeTest.compileOnlyConfigurationName, "org.jetbrains:annotations:26.0.2")
    add(nativeTest.compileOnlyConfigurationName, "org.checkerframework:checker-qual:3.49.2")
    add(nativeTest.runtimeOnlyConfigurationName, "org.junit.platform:junit-platform-launcher")
}
val nativeRuntimeJars = files(fileTree(nativeRuntime) {
    include("versions/**/*.jar", "libraries/**/*.jar")
}).builtBy(prepareNativeRuntime)
// Pinned output-only packet codec; native classes remain provided by the server, never bundled.
sourceSets.main.get().compileClasspath += nativeRuntimeJars
nativeTest.compileClasspath += sourceSets.main.get().output + nativeRuntimeJars
nativeTest.runtimeClasspath += sourceSets.main.get().output + nativeRuntimeJars
val nativeCompatibilityTest = tasks.register<Test>("nativeCompatibilityTest") {
    description = "Verifies packaged metadata and native item serialization without starting a server"
    dependsOn(tasks.jar, sheetResourcePack)
    testClassesDirs = nativeTest.output.classesDirs
    classpath = nativeTest.runtimeClasspath
    useJUnitPlatform()
    maxHeapSize = "1G"
    workingDir(nativeRuntime)
    systemProperty("distribution.jar", tasks.jar.get().archiveFile.get().asFile.absolutePath)
    systemProperty("resource.pack.zip", sheetResourcePack.get().archiveFile.get().asFile.absolutePath)
}
val installReleaseTools = tasks.register<Exec>("installReleaseTools") {
    commandLine("npm", "ci", "--ignore-scripts", "--no-audit", "--no-fund")
}
val releaseToolCheck = tasks.register<Exec>("releaseToolCheck") {
    dependsOn(installReleaseTools)
    commandLine("npm", "test")
}
tasks.check { dependsOn(nativeCompatibilityTest, releaseToolCheck) }

tasks.processResources {
    dependsOn(generateResourcePackMetadata)
    inputs.property("pluginVersion", pluginVersion)
    filesMatching("plugin.yml") {
        expand("version" to pluginVersion)
    }
}