[CmdletBinding()]
param(
    [ValidateSet('Debug', 'Release')]
    [string]$Configuration = 'Release'
)

$ErrorActionPreference = 'Stop'

$projectDir = $PSScriptRoot
. (Join-Path $projectDir '..\QemuA6Ude\common.ps1')
$msvcRoot = Find-Qa6MsvcRoot
$vsInstall = (Resolve-Path (Join-Path $msvcRoot '..\..\..\..')).Path
$vsDevCmd = Join-Path $vsInstall 'Common7\Tools\VsDevCmd.bat'
$cl = Join-Path $msvcRoot 'bin\Hostx64\x64\cl.exe'
$outputDir = Join-Path $projectDir "build\$Configuration\x64"
$exePath = Join-Path $outputDir 'QemuA6UsbBridge.exe'

if (-not (Test-Path -LiteralPath $vsDevCmd -PathType Leaf)) {
    throw "Visual Studio environment not found: $vsDevCmd"
}

New-Item -ItemType Directory -Force -Path $outputDir | Out-Null

$environmentCommand = 'call "{0}" -arch=x64 -host_arch=x64 >nul && set' -f $vsDevCmd
$environmentLines = & cmd.exe /d /s /c $environmentCommand
if ($LASTEXITCODE -ne 0) {
    throw 'Unable to load the x64 MSVC environment.'
}
foreach ($line in $environmentLines) {
    $separator = $line.IndexOf('=')
    if ($separator -gt 0) {
        $name = $line.Substring(0, $separator)
        $value = $line.Substring($separator + 1)
        Set-Item -Path "Env:$name" -Value $value
    }
}

$arguments = @('/nologo', '/W4', '/D_CRT_SECURE_NO_WARNINGS', '/MT')
if ($Configuration -eq 'Release') {
    $arguments += @('/O2')
} else {
    $arguments += @('/Od', '/Zi')
}
$arguments += @(
    "/Fo:$outputDir\bridge.obj",
    (Join-Path $projectDir 'bridge.c'),
    "/Fe:$exePath",
    '/link', 'ws2_32.lib'
)

& $cl @arguments
if ($LASTEXITCODE -ne 0) {
    throw "USB bridge build failed ($LASTEXITCODE)."
}

Write-Host "Bridge built: $exePath"