// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:8.13.2'
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
        maven { url 'https://jitpack.io' }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

def loadLocalProperties() {
    def props = new Properties()
    def propsFile = rootProject.file("local.properties")
    if (propsFile.exists()) {
        propsFile.withInputStream { props.load(it) }
    }
    return props
}

def resolveSdkDir() {
    def props = loadLocalProperties()
    return props.getProperty("sdk.dir") ?: System.getenv("ANDROID_SDK_ROOT") ?: System.getenv("ANDROID_HOME")
}

def isWindows = System.getProperty("os.name").toLowerCase().contains("windows")
def npmCmd = isWindows ? "npm.cmd" : "npm"

def findWindowsNpm() {
    def candidates = []
    def pathEnv = System.getenv("PATH") ?: ""
    pathEnv.split(";").each { p ->
        if (!p) return
        def cmd = new File(p, "npm.cmd")
        if (cmd.exists()) candidates << cmd
        def exe = new File(p, "npm.exe")
        if (exe.exists()) candidates << exe
    }
    def nvmHome = System.getenv("NVM_HOME")
    def nvmSymlink = System.getenv("NVM_SYMLINK")
    if (nvmSymlink) {
        def cmd = new File(nvmSymlink, "npm.cmd")
        if (cmd.exists()) candidates << cmd
    }
    if (nvmHome) {
        def current = new File(nvmHome, "current")
        if (current.exists()) {
            def cmd = new File(current, "npm.cmd")
            if (cmd.exists()) candidates << cmd
        }
        def versions = new File(nvmHome)
        if (versions.exists()) {
            versions.listFiles()?.findAll { it.isDirectory() }?.each { v ->
                def cmd = new File(v, "npm.cmd")
                if (cmd.exists()) candidates << cmd
            }
        }
    }
    def appData = System.getenv("APPDATA")
    if (appData) {
        def cmd = new File(appData, "npm\\npm.cmd")
        if (cmd.exists()) candidates << cmd
    }
    def programFiles = System.getenv("ProgramFiles")
    if (programFiles) {
        def cmd = new File(programFiles, "nodejs\\npm.cmd")
        if (cmd.exists()) candidates << cmd
    }
    def localAppData = System.getenv("LOCALAPPDATA")
    if (localAppData) {
        def nvmLocal = new File(localAppData, "nvm")
        if (nvmLocal.exists()) {
            nvmLocal.listFiles()?.findAll { it.isDirectory() }?.each { v ->
                def cmd = new File(v, "npm.cmd")
                if (cmd.exists()) candidates << cmd
            }
        }
    }
    return candidates.isEmpty() ? null : candidates.first().absolutePath
}

def findWindowsNode() {
    def candidates = []
    def pathEnv = System.getenv("PATH") ?: ""
    pathEnv.split(";").each { p ->
        if (!p) return
        def exe = new File(p, "node.exe")
        if (exe.exists()) candidates << exe
    }
    def nvmHome = System.getenv("NVM_HOME")
    def nvmSymlink = System.getenv("NVM_SYMLINK")
    if (nvmSymlink) {
        def exe = new File(nvmSymlink, "node.exe")
        if (exe.exists()) candidates << exe
    }
    if (nvmHome) {
        def current = new File(nvmHome, "current")
        if (current.exists()) {
            def exe = new File(current, "node.exe")
            if (exe.exists()) candidates << exe
        }
        def versions = new File(nvmHome)
        if (versions.exists()) {
            versions.listFiles()?.findAll { it.isDirectory() }?.each { v ->
                def exe = new File(v, "node.exe")
                if (exe.exists()) candidates << exe
            }
        }
    }
    def programFiles = System.getenv("ProgramFiles")
    if (programFiles) {
        def exe = new File(programFiles, "nodejs\\node.exe")
        if (exe.exists()) candidates << exe
    }
    def localAppData = System.getenv("LOCALAPPDATA")
    if (localAppData) {
        def nvmLocal = new File(localAppData, "nvm")
        if (nvmLocal.exists()) {
            nvmLocal.listFiles()?.findAll { it.isDirectory() }?.each { v ->
                def exe = new File(v, "node.exe")
                if (exe.exists()) candidates << exe
            }
        }
    }
    return candidates.isEmpty() ? null : candidates.first().absolutePath
}

def backendDir = file("${rootDir}/backend")
def backendNodeModulesDir = new File(backendDir, "node_modules")
def npmPathProp = providers.gradleProperty("npmPath")
    .orElse(providers.environmentVariable("NPM_PATH"))

def resolvedWindowsNpm = null
def resolvedWindowsNode = null
if (isWindows) {
    resolvedWindowsNpm = npmPathProp.orNull?.toString() ?: findWindowsNpm()
    if (!resolvedWindowsNpm) {
        throw new GradleException("npm not found. Set -PnpmPath=... or ensure npm is visible to cmd.exe. If using nvm, try your NVM_HOME version's npm.cmd.")
    }
    resolvedWindowsNode = findWindowsNode()
    if (!resolvedWindowsNode) {
        throw new GradleException("node.exe not found. Ensure Node.js is installed and visible to cmd.exe.")
    }
}

tasks.register("installBackendDeps", Exec) {
    workingDir backendDir
    onlyIf { !backendNodeModulesDir.exists() }
    if (isWindows) {
        commandLine "cmd", "/c", resolvedWindowsNpm, "install"
    } else {
        commandLine "sh", "-c", "${npmCmd} install"
    }
}

tasks.register("startBackend") {
    dependsOn("installBackendDeps")
    doLast {
        def command = isWindows
            ? [resolvedWindowsNode, "--no-deprecation", "server.js"]
            : ["sh", "-c", "${npmCmd} start"]

        def process = new ProcessBuilder(command)
            .directory(backendDir)
            .start()

        def stopProcess = {
            if (!process.isAlive()) {
                return
            }
            if (isWindows) {
                new ProcessBuilder("cmd", "/c", "taskkill", "/PID", process.pid().toString(), "/T", "/F")
                    .start()
                    .waitFor()
            } else {
                process.destroy()
                process.waitFor(5, java.util.concurrent.TimeUnit.SECONDS)
                if (process.isAlive()) {
                    process.destroyForcibly()
                }
            }
        }

        def pumpStream = { input, output ->
            Thread.start {
                input.withReader("UTF-8") { reader ->
                    String line
                    while ((line = reader.readLine()) != null) {
                        output.println(line)
                    }
                }
            }
        }

        def outThread = pumpStream(process.inputStream, System.out)
        def errThread = pumpStream(process.errorStream, System.err)

        def shutdownHook = new Thread({
            stopProcess()
        }, "stop-backend-on-gradle-exit")

        Runtime.getRuntime().addShutdownHook(shutdownHook)
        try {
            def exitCode = process.waitFor()
            outThread.join(1000)
            errThread.join(1000)
            if (exitCode != 0) {
                throw new GradleException("Backend process exited with code ${exitCode}")
            }
        } finally {
            stopProcess()
            try {
                Runtime.getRuntime().removeShutdownHook(shutdownHook)
            } catch (IllegalStateException ignored) {
                // Ignore; JVM is already shutting down and hook execution has begun.
            }
        }
    }
}

tasks.register("runBackendDebug") {
    dependsOn(":app:installDebug", "startBackend")
    doLast {
        def sdkDir = resolveSdkDir()
        if (!sdkDir) {
            throw new GradleException("Missing sdk.dir in local.properties and ANDROID_SDK_ROOT/ANDROID_HOME is not set")
        }
        def adb = "${sdkDir}/platform-tools/adb" + (isWindows ? ".exe" : "")
        exec {
            commandLine adb, "shell", "am", "start", "-n", "com.dark98.santoku/.MainActivity"
        }
    }
}