$ErrorActionPreference = 'Stop'
$gcc = 'C:\msys64\mingw64\bin'
if (-not (Test-Path (Join-Path $gcc 'gcc.exe'))) {
  throw "gcc not found at $gcc"
}
$msvcCl = 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30133\bin\Hostx64\x64'
if (-not (Test-Path (Join-Path $msvcCl 'cl.exe'))) {
  throw "cl.exe not found at $msvcCl"
}
$env:PATH = "$gcc;$msvcCl;" + $env:PATH
$env:CGO_ENABLED = '1'

# SDRplay
$env:CGO_CFLAGS = '-IC:\PROGRA~1\SDRplay\API\inc'
$env:CGO_LDFLAGS = '-LC:\PROGRA~1\SDRplay\API\x64 -lsdrplay_api'

# CUDA (cuFFT)
# Prefer C:\CUDA if present (no spaces)
$cudaInc = 'C:\CUDA\include'
$cudaLib = 'C:\CUDA\lib\x64'
$cudaBin = 'C:\CUDA\bin'

if (-not (Test-Path $cudaInc)) {
  $cudaInc = 'C:\PROGRA~1\NVIDIA GPU Computing Toolkit\CUDA\v13.2\include'
  $cudaLib = 'C:\PROGRA~1\NVIDIA GPU Computing Toolkit\CUDA\v13.2\lib\x64'
  $cudaBin = 'C:\PROGRA~1\NVIDIA GPU Computing Toolkit\CUDA\v13.2\bin'
}
if (Test-Path $cudaInc) {
  $env:CGO_CFLAGS = "$env:CGO_CFLAGS -I$cudaInc"
}
if (Test-Path $cudaBin) {
  $env:PATH = "$cudaBin;" + $env:PATH
}

$cudaMingw = Join-Path $PSScriptRoot 'cuda-mingw'
if (Test-Path $cudaMingw) {
  # Use MinGW import libs to avoid MSVC .lib linking issues
  $env:CGO_LDFLAGS = "$env:CGO_LDFLAGS -L$cudaMingw"
} elseif (Test-Path $cudaLib) {
  # Fallback to CUDA lib path (requires compatible toolchain)
  $env:CGO_LDFLAGS = "$env:CGO_LDFLAGS -L$cudaLib -lcufft -lcudart"
}

Write-Host "Building with SDRplay + cuFFT support..." -ForegroundColor Cyan
Write-Host "WARNING: this path still performs final Go linking through MinGW GCC." -ForegroundColor Yellow
Write-Host "If CUDA kernel artifacts are MSVC-built, final link may fail due to mixed toolchains." -ForegroundColor Yellow
Write-Host "Use build-cuda-windows.ps1 for CUDA artifact prep; use this script for the current MinGW-oriented app build path." -ForegroundColor Yellow

$gccHost = Join-Path $gcc 'g++.exe'
if (!(Test-Path $gccHost)) {
  throw "g++.exe not found at $gccHost"
}

# Kernel build currently relies on nvcc + MSVC host compiler availability.
powershell -ExecutionPolicy Bypass -File tools\build-gpudemod-kernel.ps1
if ($LASTEXITCODE -ne 0) { throw "kernel build failed" }

go build -tags "sdrplay,cufft" ./cmd/sdrd

if ($LASTEXITCODE -ne 0) { throw "build failed" }

Write-Host "Done." -ForegroundColor Green