#Requires -Version 7.2
<#
.SYNOPSIS
    Builds the Vulcast Vertical OBS plugin DLL.
    CMake handles all dependency downloads and OBS builds automatically.
    Re-run to rebuild only (deps are cached by cmake).
#>
$ErrorActionPreference = 'Stop'
$ProgressPreference = 'SilentlyContinue'

$WORK = "$env:TEMP\vulcast-build"
$SRC = "$WORK\vulcast-vertical"

Write-Host "=== Vulcast Vertical Build Script ===" -ForegroundColor Cyan
Write-Host ""

# ---------- Build Tools ----------
function Find-MSVC {
    $vsWhere = "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe"
    if (Test-Path $vsWhere) {
        $p = & $vsWhere -latest -property installationPath 2>$null
        if ($p) { return $p }
    }
    foreach ($v in '2022','2019') {
        foreach ($ed in 'BuildTools','Community','Professional','Enterprise') {
            foreach ($base in "${env:ProgramFiles(x86)}","${env:ProgramFiles}") {
                $p = "$base\Microsoft Visual Studio\$v\$ed"
                if (Test-Path "$p\VC\Auxiliary\Build\vcvarsall.bat") { return $p }
            }
        }
    }
    return $null
}

$vsPath = Find-MSVC
if (-not $vsPath) {
    Write-Host "Installing VS 2022 Build Tools (~3GB, 5-15 min)..." -ForegroundColor Yellow
    $installer = "$env:TEMP\vs_buildtools.exe"
    if (-not (Test-Path $installer)) {
        Invoke-WebRequest -Uri 'https://aka.ms/vs/17/release/vs_BuildTools.exe' -OutFile $installer
    }
    $proc = Start-Process -FilePath $installer -ArgumentList @(
        '--quiet','--wait','--norestart',
        '--add','Microsoft.VisualStudio.Workload.VCTools',
        '--add','Microsoft.VisualStudio.Component.VC.Tools.x86.x64',
        '--add','Microsoft.VisualStudio.Component.Windows11SDK.22621',
        '--includeRecommended'
    ) -Wait -PassThru
    if ($proc.ExitCode -ne 0 -and $proc.ExitCode -ne 3010) {
        Write-Error "Install failed. Get it from https://visualstudio.microsoft.com/downloads/"
        exit 1
    }
    $vsPath = Find-MSVC
    if (-not $vsPath) {
        Write-Error "Installed but not found. Restart terminal and run again."
        exit 1
    }
    Write-Host "[OK] Installed: $vsPath`n" -ForegroundColor Green
} else {
    Write-Host "[OK] Build Tools: $vsPath`n" -ForegroundColor Green
}

$vcvars = Get-ChildItem -Path $vsPath -Recurse -Filter 'vcvarsall.bat' -ErrorAction SilentlyContinue |
    Select-Object -First 1 -ExpandProperty FullName
if (-not $vcvars) { Write-Error "vcvarsall.bat not found"; exit 1 }

Write-Host "Setting up MSVC x64..." -ForegroundColor Yellow
cmd /c "`"$vcvars`" x64 >nul 2>&1 && set" | ForEach-Object {
    if ($_ -match '^([^=]+)=(.*)$') {
        [System.Environment]::SetEnvironmentVariable($Matches[1], $Matches[2])
    }
}
if (Get-Command cl.exe -ErrorAction SilentlyContinue) { Write-Host "[OK] cl.exe ready`n" -ForegroundColor Green }

# ---------- Download source (skip if exists) ----------
New-Item -ItemType Directory -Path $WORK -Force | Out-Null
if (-not (Test-Path "$SRC\CMakeLists.txt")) {
    Write-Host "Downloading source..." -ForegroundColor Yellow
    Invoke-WebRequest -Uri 'https://vulcast.xyz/dl/vulcast-vertical-source.zip' -OutFile "$WORK\source.zip"
    Expand-Archive -Path "$WORK\source.zip" -DestinationPath $WORK -Force
    Write-Host ""
}

# ---------- Build (cmake handles all deps automatically) ----------
Write-Host "Configuring plugin (cmake downloads OBS + deps on first run)..." -ForegroundColor Yellow
Push-Location $SRC

cmake -S . -B build `
    -G "Visual Studio 17 2022" -A x64 `
    -DBUILD_OUT_OF_TREE=On `
    -DCMAKE_BUILD_TYPE=Release 2>&1 | Write-Host

Write-Host "`nBuilding..." -ForegroundColor Yellow
cmake --build build --config Release -- /m /noLogo 2>&1 | Write-Host
Pop-Location

# ---------- Done ----------
$dll = Get-ChildItem -Path "$SRC\build" -Recurse -Filter "vulcast-vertical.dll" -ErrorAction SilentlyContinue | Select-Object -First 1
if ($dll) {
    $dest = "$env:USERPROFILE\Desktop\vulcast-vertical.dll"
    Copy-Item $dll.FullName $dest -Force
    Write-Host "`n=== BUILD SUCCESSFUL ===" -ForegroundColor Green
    Write-Host "DLL: $dest" -ForegroundColor Green
    Write-Host "`nInstall: copy to `"C:\Program Files\obs-studio\obs-plugins\64bit\`" and restart OBS."
} else {
    Write-Error "DLL not found. Check output above."
}