# 90CN.dll one-click build script.
#
#   1. locate MSBuild (Build Tools / VS 2019 / VS 2022)
#   2. build Release|Win32 from client-patch/90CN.vcxproj
#   3. write the self-integrity CRC32 into the fresh DLL (patch_dll_crc.py)
#   4. print the size + SHA-256 that client_build_id.go must carry
#
# Usage (from anywhere):
#   powershell -ExecutionPolicy Bypass -File build_90cn.ps1
#   powershell -ExecutionPolicy Bypass -File build_90cn.ps1 -SkipCrc
#
# The output DLL lands in client-patch\Release\90CN.dll and is copied to
# ..\out\90CN.dll for convenience.

param(
    [switch]$SkipCrc,
    [string]$Configuration = "Release",
    [string]$Platform = "Win32"
)

$ErrorActionPreference = "Stop"
$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$projectDir = Split-Path -Parent $here
$vcxproj = Join-Path $projectDir "90CN.vcxproj"

function Find-MSBuild {
    $vswhere = "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe"
    if (Test-Path $vswhere) {
        $path = & $vswhere -latest -products * -requires Microsoft.Component.MSBuild `
            -find "MSBuild\**\Bin\MSBuild.exe" | Select-Object -First 1
        if ($path) { return $path }
    }
    $candidates = @(
        "C:\VS\BuildTools\MSBuild\Current\Bin\MSBuild.exe",
        "${env:ProgramFiles}\Microsoft Visual Studio\2022\BuildTools\MSBuild\Current\Bin\MSBuild.exe",
        "${env:ProgramFiles}\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin\MSBuild.exe",
        "${env:ProgramFiles(x86)}\Microsoft Visual Studio\2019\BuildTools\MSBuild\Current\Bin\MSBuild.exe",
        "${env:ProgramFiles(x86)}\Microsoft Visual Studio\2019\Community\MSBuild\Current\Bin\MSBuild.exe"
    )
    foreach ($c in $candidates) { if (Test-Path $c) { return $c } }
    return $null
}

if (-not (Test-Path $vcxproj)) { throw "vcxproj not found: $vcxproj" }

$msbuild = Find-MSBuild
if (-not $msbuild) {
    throw @"
MSBuild not found.

Install the free "Build Tools for Visual Studio" and tick:
  - 使用 C++ 的桌面开发 (Desktop development with C++)
  - MSVC v142 - VS 2019 C++ x64/x86 生成工具
  - Windows 10 SDK

Download: https://aka.ms/vs/17/release/vs_BuildTools.exe
"@
}

Write-Host "[1/4] MSBuild : $msbuild"
Write-Host "[2/4] building $Configuration|$Platform ..."

& $msbuild $vcxproj /nologo /v:minimal /m `
    /p:Configuration=$Configuration /p:Platform=$Platform
if ($LASTEXITCODE -ne 0) { throw "build failed (exit $LASTEXITCODE)" }

$dll = Join-Path $projectDir "$Configuration\90CN.dll"
if (-not (Test-Path $dll)) { throw "build succeeded but $dll is missing" }

if (-not $SkipCrc) {
    Write-Host "[3/4] patching self-integrity CRC ..."
    $python = (Get-Command python -ErrorAction SilentlyContinue).Source
    if (-not $python) { $python = (Get-Command py -ErrorAction SilentlyContinue).Source }
    if (-not $python) { throw "python not found; run with -SkipCrc or install Python" }
    & $python (Join-Path $here "patch_dll_crc.py") patch $dll
    if ($LASTEXITCODE -ne 0) { throw "CRC patch/verify failed" }
} else {
    Write-Host "[3/4] CRC patch skipped (-SkipCrc)"
}

$outDir = Join-Path (Split-Path -Parent $projectDir) "out"
New-Item -ItemType Directory -Force -Path $outDir | Out-Null
Copy-Item $dll (Join-Path $outDir "90CN.dll") -Force

$size = (Get-Item $dll).Length
$sha = (Get-FileHash $dll -Algorithm SHA256).Hash

Write-Host "[4/4] done"
Write-Host ""
Write-Host "  dll   : $dll"
Write-Host "  size  : $size"
Write-Host "  sha256: $sha"
Write-Host ""
Write-Host "Update server/internal/services/dnfbridge/client_build_id.go with:"
Write-Host "  boundDllBytes  = int64($size)"
Write-Host "  boundDllSHA256 = `"$sha`""