import org.objectweb.asm.ClassReader
import org.objectweb.asm.ClassWriter
import org.objectweb.asm.ClassVisitor
import org.objectweb.asm.Opcodes
import org.objectweb.asm.commons.ClassRemapper
import org.objectweb.asm.commons.Remapper

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        // ASM is used by the build-time class-name obfuscation step (ext.obfuscateJar).
        // It runs on the already-built jar, so it lives on the buildscript classpath
        // rather than the project compile/runtime classpath.
        //
        // NOTE: the buildscript-classpath ASM also backs Groovy's build-script type
        // resolution, so it must be able to read the class files of the JDK that runs
        // Gradle. ASM 9.6 supports up to Java 21 (major version 65) — run Gradle on the
        // project's JDK 17 (not a newer JDK like 25/major 69, which 9.6 cannot read).
        classpath 'org.ow2.asm:asm-commons:9.6'
    }
}

plugins {
    id 'eclipse'
    id 'idea'
    id 'maven-publish'
    id 'net.minecraftforge.gradle' version '[6.0,6.2)'
}

version = mod_version
group = mod_group_id

base {
    archivesName = mod_id
}

// Mojang ships Java 17 to end users in 1.18+, so your mod should target Java 17.
java.toolchain.languageVersion = JavaLanguageVersion.of(17)

println "Java: ${System.getProperty 'java.version'}, JVM: ${System.getProperty 'java.vm.version'} (${System.getProperty 'java.vendor'}), Arch: ${System.getProperty 'os.arch'}"
minecraft {
    // The mappings can be changed at any time and must be in the following format.
    // Channel:   Version:
    // official   MCVersion             Official field/method names from Mojang mapping files
    // parchment  YYYY.MM.DD-MCVersion  Open community-sourced parameter names and javadocs layered on top of official
    //
    // You must be aware of the Mojang license when using the 'official' or 'parchment' mappings.
    // See more information here: https://github.com/MinecraftForge/MCPConfig/blob/master/Mojang.md
    //
    // Parchment is an unofficial project maintained by ParchmentMC, separate from MinecraftForge
    // Additional setup is needed to use their mappings: https://parchmentmc.org/docs/getting-started
    //
    // Use non-default mappings at your own risk. They may not always work.
    // Simply re-run your setup task after changing the mappings to update your workspace.
    mappings channel: mapping_channel, version: mapping_version

    // When true, this property will have all Eclipse/IntelliJ IDEA run configurations run the "prepareX" task for the given run configuration before launching the game.
    // In most cases, it is not necessary to enable.
    // enableEclipsePrepareRuns = true
    // enableIdeaPrepareRuns = true

    // This property allows configuring Gradle's ProcessResources task(s) to run on IDE output locations before launching the game.
    // It is REQUIRED to be set to true for this template to function.
    // See https://docs.gradle.org/current/dsl/org.gradle.language.jvm.tasks.ProcessResources.html
    copyIdeResources = true

    // When true, this property will add the folder name of all declared run configurations to generated IDE run configurations.
    // The folder name can be set on a run configuration using the "folderName" property.
    // By default, the folder name of a run configuration is the name of the Gradle project containing it.
    // generateRunFolders = true

    // This property enables access transformers for use in development.
    // They will be applied to the Minecraft artifact.
    // The access transformer file can be anywhere in the project.
    // However, it must be at "META-INF/accesstransformer.cfg" in the final mod jar to be loaded by Forge.
    // This default location is a best practice to automatically put the file in the right place in the final jar.
    // See https://docs.minecraftforge.net/en/latest/advanced/accesstransformers/ for more information.
    // accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')

    // Default run configurations.
    // These can be tweaked, removed, or duplicated as needed.
    runs {
        // applies to all the run configs below
        configureEach {
            workingDirectory project.file('run')

            // Recommended logging data for a userdev environment
            // The markers can be added/remove as needed separated by commas.
            // "SCAN": For mods scan.
            // "REGISTRIES": For firing of registry events.
            // "REGISTRYDUMP": For getting the contents of all registries.
            property 'forge.logging.markers', 'REGISTRIES'

            // Recommended logging level for the console
            // You can set various levels here.
            // Please read: https://stackoverflow.com/questions/2031163/when-to-use-the-different-log-levels
            property 'forge.logging.console.level', 'debug'

            mods {
                "${mod_id}" {
                    source sourceSets.main
                }
            }
        }

        client {
            // Comma-separated list of namespaces to load gametests from. Empty = all namespaces.
            property 'forge.enabledGameTestNamespaces', mod_id
            // Inject the built mod jar as a Java agent so PatchAgent.premain() runs before
            // Minecraft classes are loaded. Use runClient0 (defined below) to ensure the jar is
            // built first.
            jvmArgs.add "-javaagent:${tasks.jar.archiveFile.get().asFile.absolutePath}".toString()
            // Allow the agent to attach to itself if PatchAgent.installPatchesAndRetransform
            // needs to fall back to the Attach API.
            jvmArgs.add "-Djdk.attach.allowAttachSelf=true".toString()
        }

        server {
            property 'forge.enabledGameTestNamespaces', mod_id
            args '--nogui'
        }

        // This run config launches GameTestServer and runs all registered gametests, then exits.
        // By default, the server will crash when no gametests are provided.
        // The gametest system is also enabled by default for other run configs under the /test command.
        gameTestServer {
            property 'forge.enabledGameTestNamespaces', mod_id
        }

        data {
            // example of overriding the workingDirectory set in configureEach above
            workingDirectory project.file('run-data')

            // Specify the modid for data generation, where to output the resulting resource, and where to look for existing resources.
            args '--mod', mod_id, '--all', '--output', file('src/generated/resources/'), '--existing', file('src/main/resources/')
        }
    }
}

// Include resources generated by data generators.
sourceSets.main.resources { srcDir 'src/generated/resources' }

repositories {
    // Put repositories for dependencies here
    // ForgeGradle automatically adds the Forge maven and Maven Central for you

    // If you have mod jar dependencies in ./libs, you can declare them as a repository like so.
    // See https://docs.gradle.org/current/userguide/declaring_repositories.html#sub:flat_dir_resolver
    // flatDir {
    //     dir 'libs'
    // }

    maven { url = "https://pkgs.dev.azure.com/djtheredstoner/DevAuth/_packaging/public/maven/v1" }
}

dependencies {
    // Specify the version of Minecraft to use.
    // Any artifact can be supplied so long as it has a "userdev" classifier artifact and is a compatible patcher artifact.
    // The "userdev" classifier will be requested and setup by ForgeGradle.
    // If the group id is "net.minecraft" and the artifact id is one of ["client", "server", "joined"],
    // then special handling is done to allow a setup of a vanilla dependency without the use of an external repository.
    minecraft "net.minecraftforge:forge:${minecraft_version}-${forge_version}"

    compileOnly 'org.projectlombok:lombok:1.18.34'
    annotationProcessor 'org.projectlombok:lombok:1.18.34'

    // ASM (already on Forge classpath at runtime via Mojang deps, but declare for IDE/compile)
    implementation 'org.ow2.asm:asm:9.6'
    implementation 'org.ow2.asm:asm-tree:9.6'
    implementation 'org.ow2.asm:asm-commons:9.6'
    implementation 'org.ow2.asm:asm-util:9.6'

    // Dev Auth
    runtimeOnly("me.djtheredstoner:DevAuth-forge-latest:1.2.2")

    // Example mod dependency with JEI - using fg.deobf() ensures the dependency is remapped to your development mappings
    // The JEI API is declared for compile time use, while the full JEI artifact is used at runtime
    // compileOnly fg.deobf("mezz.jei:jei-${mc_version}-common-api:${jei_version}")
    // compileOnly fg.deobf("mezz.jei:jei-${mc_version}-forge-api:${jei_version}")
    // runtimeOnly fg.deobf("mezz.jei:jei-${mc_version}-forge:${jei_version}")

    // Example mod dependency using a mod jar from ./libs with a flat dir repository
    // This maps to ./libs/coolmod-${mc_version}-${coolmod_version}.jar
    // The group id is ignored when searching -- in this case, it is "blank"
    // implementation fg.deobf("blank:coolmod-${mc_version}:${coolmod_version}")

    // For more info:
    // http://www.gradle.org/docs/current/userguide/artifact_dependencies_tutorial.html
    // http://www.gradle.org/docs/current/userguide/dependency_management.html
}

// This block of code expands all declared replace properties in the specified resource targets.
// A missing property will result in an error. Properties are expanded using ${} Groovy notation.
// When "copyIdeResources" is enabled, this will also run before the game launches in IDE environments.
// See https://docs.gradle.org/current/dsl/org.gradle.language.jvm.tasks.ProcessResources.html
tasks.named('processResources', ProcessResources).configure {
    var replaceProperties = [
            minecraft_version: minecraft_version, minecraft_version_range: minecraft_version_range,
            forge_version: forge_version, forge_version_range: forge_version_range,
            loader_version_range: loader_version_range,
            mod_id: mod_id, mod_name: mod_name, mod_license: mod_license, mod_version: mod_version,
            mod_authors: mod_authors, mod_description: mod_description,
    ]
    inputs.properties replaceProperties

    filesMatching(['META-INF/mods.toml', 'pack.mcmeta']) {
        expand replaceProperties + [project: project]
    }
}

// Example for how to get properties into the manifest for reading at runtime.
tasks.named('jar', Jar).configure {
    manifest {
        attributes([
                'Specification-Title'     : mod_id,
                'Specification-Vendor'    : mod_authors,
                'Specification-Version'   : '1', // We are version 1 of ourselves
                'Implementation-Title'    : project.name,
                'Implementation-Version'  : project.jar.archiveVersion,
                'Implementation-Vendor'   : mod_authors,
                'Implementation-Timestamp': new Date().format("yyyy-MM-dd'T'HH:mm:ssZ"),
                // Java-agent entry points so the jar can be passed via -javaagent:
                'Premain-Class'           : 'asm.patchify.loader.PatchAgent',
                'Agent-Class'             : 'asm.patchify.loader.PatchAgent',
                'Can-Retransform-Classes' : 'true',
                'Can-Redefine-Classes'    : 'true'
        ])
    }

    // This is the preferred method to reobfuscate your jar file
    finalizedBy 'reobfJar'
}

// ===== Build-time class-name obfuscation =====
//
// Renames EVERY OpenZen class (shit.zen.** and asm.patchify.**) to an opaque
// generated name, so no original class name survives in the distributed jar.
// It runs on the reobf'd jar and only touches our two package trees —
// net.minecraft.** / net.minecraftforge.** references are left exactly as
// ForgeGradle's mojmap->SRG reobf produced them, so reobf and runtime
// remapping are unaffected.
//
// CLASS NAMES ONLY: method/field names are preserved, so the JNI method lookups
// (GameLoaderBridge.load, DllBootstrap.start), reflection, GSON @SerializedName
// wire keys and the manifest member contracts all keep working.
//
// NOTHING IS HARD-CODED. The three bootstrap classes referenced by string
// OUTSIDE the bytecode the remapper rewrites are kept in lockstep by
// propagating their freshly generated names:
//   asm.patchify.loader.PatchAgent -> jar manifest Premain/Agent-Class (rewritten below)
//   shit.zen.dll.DllBootstrap      -> Class.forName(...) string literal (rewritten via Remapper.mapValue)
//   shit.zen.dll.GameLoaderBridge  -> native DLL loader, via a generated C++ header
//                                     (native/dll/src/generated_names.h) emitted below.
ext.obfuscateJar = { File jarFile, File mappingOut ->
    def owned = { String internal -> internal.startsWith('shit/zen/') || internal.startsWith('asm/patchify/') }

    // Pass 1: enumerate the classes we own (every shit.zen.* / asm.patchify.* class).
    def ownedNames = []
    new java.util.zip.ZipFile(jarFile).withCloseable { zf ->
        for (entry in Collections.list(zf.entries())) {
            if (!entry.directory && entry.name.endsWith('.class')) {
                def internal = entry.name.substring(0, entry.name.length() - 6)
                if (owned(internal)) ownedNames << internal
            }
        }
    }
    if (ownedNames.isEmpty()) {
        logger.lifecycle("obfuscateJar: no original class names in ${jarFile.name} (already obfuscated) — skipping")
        return
    }
    // Pass 2: assign each owned class a FRESH RANDOM 16-char name, so the obfuscated
    // names differ on every build and encode nothing. Uniqueness is enforced. The
    // names are unpredictable, so build/rename-mapping.txt (written below) is the only
    // way to de-obfuscate a stack trace — each build's mapping is different; keep it.
    //
    // ALL classes go into ONE shared (also random, 16-char) package. They must share a
    // single package so that package-private (default-access) members originally used
    // between same-package classes still resolve — flattening into one package only
    // widens access, never breaks it. Per-class packages would turn those into illegal
    // cross-package accesses (IllegalAccessError) unless every member were made public.
    def typeMap = [:]
    def usedNames = new HashSet()
    def secureRandom = new java.security.SecureRandom()
    def leadAlphabet = (('a'..'z') + ('A'..'Z')).join('')                 // first char: a letter
    def nameAlphabet = (('a'..'z') + ('A'..'Z') + ('0'..'9')).join('')    // rest: alphanumeric
    def randomName = {
        def sb = new StringBuilder(16)
        sb.append(leadAlphabet.charAt(secureRandom.nextInt(leadAlphabet.length())))
        15.times { sb.append(nameAlphabet.charAt(secureRandom.nextInt(nameAlphabet.length()))) }
        sb.toString()
    }
    def obfPackage = randomName()   // one random package for every class (see note above)
    ownedNames.each { internal ->
        def newName
        while (true) { newName = randomName(); if (usedNames.add(newName)) break }
        typeMap[internal] = obfPackage + '/' + newName
    }
    // String-constant remap table — catches class names embedded as String
    // literals (e.g. Class.forName("shit.zen.dll.DllBootstrap")). Both the
    // dotted (Class.forName) and slash (internal) spellings are covered.
    def stringMap = [:]
    typeMap.each { o, n ->
        stringMap[o.replace('/', '.')] = n.replace('/', '.')
        stringMap[o] = n
    }

    def remapper = new Remapper() {
        String map(String internalName) {
            def n = typeMap[internalName]
            return n != null ? n : internalName
        }

        Object mapValue(Object value) {
            if (value instanceof String) {
                def repl = stringMap[value]
                if (repl != null) return repl
            }
            return super.mapValue(value)
        }
    }

    // Pass 2: rewrite into a temp jar, then atomically swap it in.
    def tmp = new File(jarFile.parentFile, jarFile.name + '.obf')
    tmp.delete()
    new java.util.zip.ZipFile(jarFile).withCloseable { zf ->
        new java.util.zip.ZipOutputStream(new FileOutputStream(tmp)).withCloseable { zos ->
            for (entry in Collections.list(zf.entries())) {
                if (entry.directory) continue
                def name = entry.name
                byte[] bytes = zf.getInputStream(entry).bytes
                if (name.endsWith('.class')) {
                    def internal = name.substring(0, name.length() - 6)
                    if (owned(internal)) {
                        def cr = new ClassReader(bytes)
                        def cw = new ClassWriter(0)
                        // Drop the original SourceFile name ("ZenClient.java" etc.) but keep
                        // line numbers so stack traces still carry positions.
                        def stripSource = new ClassVisitor(Opcodes.ASM9, cw) {
                            void visitSource(String source, String debug) { super.visitSource(null, null) }
                        }
                        cr.accept(new ClassRemapper(stripSource, remapper), 0)
                        bytes = cw.toByteArray()
                        name = typeMap[internal] + '.class'
                    }
                    zos.putNextEntry(new java.util.zip.ZipEntry(name)); zos.write(bytes); zos.closeEntry()
                } else if (name == 'META-INF/MANIFEST.MF') {
                    def mf = new java.util.jar.Manifest(new ByteArrayInputStream(bytes))
                    def attrs = mf.getMainAttributes()
                    ['Premain-Class', 'Agent-Class'].each { key ->
                        def v = attrs.getValue(key)
                        if (v != null) {
                            def internal = v.replace('.', '/')
                            if (typeMap.containsKey(internal)) attrs.putValue(key, typeMap[internal].replace('/', '.'))
                        }
                    }
                    def bos = new ByteArrayOutputStream(); mf.write(bos)
                    zos.putNextEntry(new java.util.zip.ZipEntry(name)); zos.write(bos.toByteArray()); zos.closeEntry()
                } else if (name.startsWith('META-INF/') &&
                        (name.endsWith('.SF') || name.endsWith('.RSA') || name.endsWith('.DSA') || name.endsWith('.EC'))) {
                    // Drop signature files — renaming class entries invalidates their digests.
                } else {
                    // Resources verbatim: mapping.srg, webui/**, assets/**, fonts, mods.toml, pack.mcmeta.
                    zos.putNextEntry(new java.util.zip.ZipEntry(name)); zos.write(bytes); zos.closeEntry()
                }
            }
        }
    }
    if (!jarFile.delete()) throw new GradleException("obfuscateJar: could not delete ${jarFile}")
    if (!tmp.renameTo(jarFile)) throw new GradleException("obfuscateJar: could not move ${tmp} -> ${jarFile}")

    mappingOut.parentFile.mkdirs()
    mappingOut.withWriter('UTF-8') { w ->
        typeMap.sort { it.key }.each { o, n -> w.writeLine("${o.replace('/', '.')} -> ${n.replace('/', '.')}") }
    }

    // Propagate the GameLoaderBridge name to the native DLL loader. class_loader.cpp
    // #includes this generated header and loads the class by OZ_BRIDGE_FQCN, so the
    // native side always matches whatever opaque name the bridge received — no
    // hard-coded class name. Generated, never committed (see .gitignore).
    def bridgeFqcn = typeMap['shit/zen/dll/GameLoaderBridge'].replace('/', '.')
    def header = file('native/dll/src/generated_names.h')
    header.parentFile.mkdirs()
    header.text = """\
// AUTO-GENERATED by build.gradle (ext.obfuscateJar). DO NOT EDIT, DO NOT COMMIT.
// The build renames every OpenZen class to an opaque name; this captures the
// generated FQCN of the DLL bootstrap bridge (originally shit.zen.dll.GameLoaderBridge)
// so the native loader can request it by name. The bridge's load(String, ClassLoader)
// method name is preserved by the rename, so main.cpp's GetStaticMethodID still works.
#pragma once
#define OZ_BRIDGE_FQCN "${bridgeFqcn}"
"""

    logger.lifecycle("obfuscateJar: renamed ${typeMap.size()} classes in ${jarFile.name}; " +
            "bridge=${bridgeFqcn}; mapping -> ${mappingOut}")
}

tasks.register('obfuscateClasses') {
    group = 'openzen'
    description = 'Rename every OpenZen class to an opaque name in the built jar (class names only).'
    dependsOn 'reobfJar'
    doLast {
        obfuscateJar(tasks.jar.archiveFile.get().asFile, file("$buildDir/rename-mapping.txt"))
    }
}

// Auto-run after every reobf so `gradlew jar` / `build` / `dll` all emit obfuscated
// names. reobfJar is created lazily by ForgeGradle, so wire via matching/configureEach.
tasks.matching { it.name == 'reobfJar' }.configureEach { finalizedBy 'obfuscateClasses' }

// However if you are in a multi-project build, dev time needs unobfed jar files, so you can delay the obfuscation until publishing by doing:
// tasks.named('publish').configure {
//     dependsOn 'reobfJar'
// }

// IZMK-style entry point: build the jar first (so the -javaagent path exists) and then launch
// the client. The client run config above already references tasks.jar via archiveFile.
tasks.register('runClient0') {
    group = 'forgegradle runs'
    description = 'Build the mod jar (used as -javaagent) and start the client.'
    dependsOn tasks.jar
    finalizedBy tasks.runClient
}

// Example configuration to allow publishing using the maven-publish plugin
publishing {
    publications {
        register('mavenJava', MavenPublication) {
            artifact jar
        }
    }
    repositories {
        maven {
            url "file://${project.projectDir}/mcmodsrepo"
        }
    }
}

tasks.withType(JavaCompile).configureEach {
    options.encoding = 'UTF-8' // Use the UTF-8 charset for Java compilation
}

// ===== Native build (DLL injection path) =====
//
// Produces:
//   build/dist/OpenZenLoader.exe        - GUI injector (OpenZen.dll embedded)
//
// Requires:
//   - JAVA_HOME pointing at a JDK 17 install (for jni.h / jvmti.h)
//   - CMake either on PATH, bundled with Visual Studio 2019/2022
//     ("C++ CMake tools for Windows" workload), or installed standalone.
//   - MSVC build tools (Visual Studio 2019+).
//
// The loader GUI is pure Win32 + GDI+ — no Qt, no vcpkg, no third-party
// downloads — so the native build needs nothing beyond the Windows SDK.
//
// Usage:
//   ./gradlew dll
//
def nativeDir = file('native')
def nativeBuildDir = file("$nativeDir/build")

ext.findCmake = {
    // 1. cmake already on PATH?
    try {
        def p = ['cmd', '/c', 'where', 'cmake'].execute()
        def out = new StringBuilder()
        p.consumeProcessOutput(out, new StringBuilder())
        p.waitForOrKill(2000)
        if (p.exitValue() == 0) {
            def first = out.toString().readLines().find { it?.trim() }
            if (first) return first.trim()
        }
    } catch (Exception ignored) {}

    // 2. Visual Studio bundled cmake via vswhere.
    def pf86 = System.getenv('ProgramFiles(x86)') ?: 'C:/Program Files (x86)'
    def vswhere = "${pf86}/Microsoft Visual Studio/Installer/vswhere.exe"
    if (file(vswhere).exists()) {
        try {
            def out = new StringBuilder()
            def p = [vswhere, '-latest', '-products', '*',
                     '-requires', 'Microsoft.VisualStudio.Component.VC.CMake.Project',
                     '-property', 'installationPath'].execute()
            p.consumeProcessOutput(out, new StringBuilder())
            p.waitForOrKill(5000)
            def vsPath = out.toString().trim()
            if (vsPath) {
                def cmakeExe = "${vsPath}/Common7/IDE/CommonExtensions/Microsoft/CMake/CMake/bin/cmake.exe"
                if (file(cmakeExe).exists()) return cmakeExe
            }
        } catch (Exception ignored) {}
    }

    // 3. Standalone CMake installations.
    def pf = System.getenv('ProgramFiles') ?: 'C:/Program Files'
    def lad = System.getenv('LOCALAPPDATA') ?: ''
    def candidates = [
            "${pf}/CMake/bin/cmake.exe",
            "${pf86}/CMake/bin/cmake.exe",
            "${lad}/Programs/CMake/bin/cmake.exe",
    ]
    for (path in candidates) {
        if (path && file(path).exists()) return path
    }
    return null
}

def cmakeMissingMessage =
        'CMake not found. Install one of:\n' +
        '  - Standalone CMake: https://cmake.org/download/ (add to PATH)\n' +
        '  - Visual Studio 2022 with "C++ CMake tools for Windows" workload\n' +
        'After installing, re-run ./gradlew dll'

ext.gitShortRevision = {
    // CI passes the resolved sha in OPENZEN_BUILD_REVISION so we don't have
    // to assume git is on PATH inside the runner image.
    def envRev = System.getenv('OPENZEN_BUILD_REVISION')
    if (envRev && !envRev.allWhitespace) return envRev.trim().take(7)
    try {
        def p = ['git', 'rev-parse', '--short=7', 'HEAD'].execute(null, project.rootDir)
        def out = new StringBuilder()
        p.consumeProcessOutput(out, new StringBuilder())
        p.waitForOrKill(2000)
        if (p.exitValue() == 0) {
            def v = out.toString().trim()
            if (v) return v
        }
    } catch (Exception ignored) {}
    return null
}

tasks.register('stageNativeJar', Copy) {
    group = 'openzen'
    description = 'Stage the freshly built mod jar at native/zen.jar so the DLL ' +
                  'resource compiler can embed it.'
    // obfuscateClasses (which dependsOn reobfJar, which dependsOn jar) rewrites
    // the jar in place, so depend on it to guarantee the DLL embeds the
    // obfuscated jar rather than racing the rename.
    dependsOn 'obfuscateClasses'
    from { tasks.jar.archiveFile }
    into nativeDir
    rename { 'zen.jar' }
}

tasks.register('configureNative', Exec) {
    group = 'openzen'
    description = 'Run CMake configure on the native sub-projects (DLL + Loader).'
    dependsOn 'stageNativeJar'
    workingDir nativeDir
    commandLine 'cmake', '-S', '.', '-B', 'build', '-A', 'x64'
    doFirst {
        def cmake = findCmake()
        if (!cmake) throw new GradleException(cmakeMissingMessage)
        def rev = gitShortRevision()
        logger.lifecycle("Using CMake : ${cmake}")
        logger.lifecycle("Build rev   : ${rev ?: '(unknown)'}")
        def args = [cmake, '-S', '.', '-B', 'build', '-A', 'x64']
        if (rev) args << "-DOPENZEN_BUILD_REVISION=${rev}"
        commandLine args
    }
}

tasks.register('buildNative', Exec) {
    group = 'openzen'
    description = 'Compile OpenZen.dll and OpenZenLoader.exe with CMake.'
    dependsOn 'configureNative'
    workingDir nativeDir
    commandLine 'cmake', '--build', 'build', '--config', 'Release'
    doFirst {
        def cmake = findCmake()
        if (!cmake) throw new GradleException(cmakeMissingMessage)
        // --parallel forwards a job count to the generator (MSBuild gets /m,
        // Ninja gets -j). MSBuild defaults to a single process otherwise.
        def jobs = Runtime.runtime.availableProcessors()
        logger.lifecycle("Parallel jobs: ${jobs}")
        commandLine cmake, '--build', 'build', '--config', 'Release',
                '--parallel', jobs.toString()
    }
}

tasks.register('packageDist') {
    group = 'openzen'
    description = 'Collect the Loader EXE into build/dist for distribution. ' +
                  'OpenZen.dll is embedded inside the EXE, so we only ship one file.'
    dependsOn 'buildNative'
    // Use an inline copy { } block inside doLast rather than the Copy task
    // type. Copy snapshots its source set at configuration time and reports
    // NO-SOURCE on a first clean build because the EXE that buildNative is
    // about to produce does not exist yet. doLast runs after buildNative,
    // by which point the file is definitely on disk.
    doLast {
        def src = file("$nativeBuildDir/loader/Release/OpenZenLoader.exe")
        if (!src.isFile()) {
            throw new GradleException(
                "Expected OpenZenLoader.exe at ${src} after buildNative; missing")
        }
        copy {
            from src
            into "$buildDir/dist"
        }
        logger.lifecycle("Packaged ${src.length()} bytes -> ${buildDir}/dist/${src.name}")
    }
}

ext.findUpx = {
    try {
        def p = ['cmd', '/c', 'where', 'upx'].execute()
        def out = new StringBuilder()
        p.consumeProcessOutput(out, new StringBuilder())
        p.waitForOrKill(2000)
        if (p.exitValue() == 0) {
            def first = out.toString().readLines().find { it?.trim() }
            if (first) return first.trim()
        }
    } catch (Exception ignored) {}
    return null
}

tasks.register('upxCompress') {
    group = 'openzen'
    description = 'Run UPX --best --lzma on the packaged OpenZenLoader.exe. ' +
                  'No-op (warning only) when upx is not on PATH so local builds ' +
                  'do not need it installed.'
    dependsOn 'packageDist'
    doLast {
        def exe = file("$buildDir/dist/OpenZenLoader.exe")
        if (!exe.isFile()) {
            throw new GradleException("packageDist did not produce ${exe}")
        }
        def upx = findUpx()
        if (!upx) {
            logger.warn("upx not on PATH; skipping compression. Install from " +
                    "https://upx.github.io/ to enable.")
            return
        }
        def before = exe.length()
        exec {
            commandLine upx, '--best', '--lzma', exe.absolutePath
        }
        def after = exe.length()
        logger.lifecycle(String.format(
                "UPX: %,d -> %,d bytes (%.1f%% of original)",
                before, after, after * 100.0 / before))
    }
}

tasks.register('dll') {
    group = 'openzen'
    description = 'Build the injectable DLL and GUI Loader (final dist artifacts).'
    dependsOn 'packageDist'
}

// Gradle's stock 'clean' only wipes the project build/ directory, so the
// CMake out-of-source build dir and the staged jar would survive a clean
// and silently feed stale bits into the next dll build. Wire a dedicated
// Delete task into 'clean' so ./gradlew clean really wipes everything.
tasks.register('cleanNative', Delete) {
    group = 'openzen'
    description = 'Remove native/build/ and the staged native/zen.jar.'
    delete nativeBuildDir
    delete file("$nativeDir/zen.jar")
}

tasks.named('clean').configure {
    dependsOn 'cleanNative'
}

// Release builds are cut by .github/workflows/build-loader.yml when the head commit
// message contains [Release]. Every build emits fresh random class names — see
// ext.obfuscateJar above and the "编译时类名混淆" section in the README.