# 构建「遥控诊断」APK（aapt2 + javac + d8 + zipalign + apksigner，不需要 Gradle）
# 用法: powershell -File diag\build_diag_apk.ps1
#
# 复用主程序的 Json.java / DiscoveryCore.java（纯 Java，无 Android 依赖），
# 这样诊断用的自动发现逻辑和主程序是**同一份代码**，不会出现"诊断能通、
# 主程序不通"的假象。
$ErrorActionPreference = "Continue"

$diag     = $PSScriptRoot                            # LanRemote/diag
$root     = Split-Path -Parent $diag                 # LanRemote
$tc       = Join-Path $root "..\starklink\toolchain"
$jdk      = Join-Path $tc "jdk17"
$sdk      = Join-Path $tc "android-sdk"
$bt       = Join-Path $sdk "build-tools\34.0.0"
$androidJar = Join-Path $sdk "platforms\android-34\android.jar"
$keystore = Join-Path $tc "debug.keystore"

$javac    = Join-Path $jdk "bin\javac.exe"
$jar      = Join-Path $jdk "bin\jar.exe"
$aapt2    = Join-Path $bt "aapt2.exe"
$zipalign = Join-Path $bt "zipalign.exe"
$apksigner= Join-Path $bt "apksigner.bat"
$d8       = Join-Path $bt "d8.bat"

$work     = Join-Path $diag "build"
$outDir   = Join-Path $root "dist"
$apkName  = "LanRemote-Diag-1.1.0.apk"

function Step($text) { Write-Host "`n=== $text ===" -ForegroundColor Cyan }

foreach ($tool in @($javac, $aapt2, $d8, $zipalign, $apksigner)) {
    if (-not (Test-Path $tool)) { throw "缺少工具: $tool" }
}

$env:JAVA_HOME = $jdk
$env:PATH = "$(Join-Path $jdk 'bin');$env:PATH"

if (Test-Path $work) { Remove-Item -Recurse -Force $work }
New-Item -ItemType Directory -Force -Path $work | Out-Null
New-Item -ItemType Directory -Force -Path $outDir | Out-Null

Step "1/6 aapt2 compile 资源"
$compiled = Join-Path $work "res.zip"
& $aapt2 compile --dir (Join-Path $diag "res") -o $compiled
if ($LASTEXITCODE -ne 0) { throw "aapt2 compile 失败" }

Step "2/6 aapt2 link"
$genDir = Join-Path $work "gen"
New-Item -ItemType Directory -Force -Path $genDir | Out-Null
$unsigned = Join-Path $work "app-unsigned.apk"
& $aapt2 link `
    -o $unsigned `
    -I $androidJar `
    --manifest (Join-Path $diag "AndroidManifest.xml") `
    -R $compiled `
    --java $genDir `
    --min-sdk-version 24 `
    --target-sdk-version 34 `
    --version-code 2 `
    --version-name "1.1.0" `
    --auto-add-overlay
if ($LASTEXITCODE -ne 0) { throw "aapt2 link 失败" }

Step "3/6 javac 编译 Java 源码"
$classesDir = Join-Path $work "classes"
New-Item -ItemType Directory -Force -Path $classesDir | Out-Null

$javaSources = @()
$javaSources += Get-ChildItem -Recurse -Filter *.java -Path (Join-Path $diag "src") |
    ForEach-Object { $_.FullName }
# 复用主程序的纯 Java 代码
foreach ($shared in @("Json.java", "B64.java", "DiscoveryCore.java", "Discovery.java")) {
    $javaSources += (Join-Path $root "android\src\com\lanremote\watch\$shared")
}
$javaSources += Get-ChildItem -Recurse -Filter R.java -Path $genDir -ErrorAction SilentlyContinue |
    ForEach-Object { $_.FullName }
if ($javaSources.Count -eq 0) { throw "没有找到 Java 源文件" }
Write-Host "源文件 $($javaSources.Count) 个"

& $javac -source 8 -target 8 -nowarn -Xlint:none -encoding UTF-8 `
    -bootclasspath $androidJar `
    -d $classesDir `
    $javaSources 2>&1 | Out-String | Write-Host
if ($LASTEXITCODE -ne 0) { throw "javac 编译失败" }

Step "4/6 d8 转换为 classes.dex"
$classesJar = Join-Path $work "classes.jar"
& $jar cf $classesJar -C $classesDir .
if ($LASTEXITCODE -ne 0) { throw "打包 classes.jar 失败" }

$dexDir = Join-Path $work "dex"
New-Item -ItemType Directory -Force -Path $dexDir | Out-Null
& $d8 --lib $androidJar --min-api 24 --output $dexDir $classesJar 2>&1 | Out-String | Write-Host
if ($LASTEXITCODE -ne 0) { throw "d8 失败" }
$dex = Join-Path $dexDir "classes.dex"
Write-Host ("classes.dex 大小 {0:N1} KB" -f ((Get-Item $dex).Length / 1KB))

Step "5/6 组装 APK"
& python (Join-Path $root "_build\pack_apk.py") $unsigned $dex
if ($LASTEXITCODE -ne 0) { throw "写入 classes.dex 失败" }

$aligned = Join-Path $work "app-aligned.apk"
& $zipalign -f 4 $unsigned $aligned
if ($LASTEXITCODE -ne 0) { throw "zipalign 失败" }

Step "6/6 apksigner 签名"
$final = Join-Path $outDir $apkName
if (Test-Path $final) { Remove-Item $final -Force }
& $apksigner sign `
    --ks $keystore `
    --ks-pass pass:android `
    --key-pass pass:android `
    --ks-key-alias androiddebugkey `
    --v1-signing-enabled true `
    --v2-signing-enabled true `
    --out $final `
    $aligned
if ($LASTEXITCODE -ne 0) { throw "签名失败" }

Step "验证签名"
& $apksigner verify --print-certs $final
if ($LASTEXITCODE -ne 0) { throw "签名校验失败" }

Step "构建完成"
Write-Host ("APK: {0}" -f $final) -ForegroundColor Green
Write-Host ("大小: {0:N2} MB" -f ((Get-Item $final).Length / 1MB)) -ForegroundColor Green