#requires -Version 5.1
# Build C++ Engine to WebAssembly (WASM) and deploy to Frontend public folder.

$ErrorActionPreference = 'Stop'

$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$ProjectRoot = (Resolve-Path (Join-Path $ScriptDir "..")).Path

# --- Resolve EMSDK ---
$emsdk = $env:EMSDK
if (-not $emsdk) {
    $candidates = @(
        "C:\Users\$env:USERNAME\emsdk",
        "C:\emsdk",
        "C:\src\emsdk",
        "C:\Users\furqa\emsdk"
    )
    foreach ($cand in $candidates) {
        if (Test-Path $cand) {
            $emsdk = $cand
            break
        }
    }
    
    if (-not $emsdk) {
        Write-Error "EMSDK environment variable was not set and could not be found at standard locations. Please set the EMSDK environment variable."
        exit 1
    }
    $env:EMSDK = $emsdk
    Write-Host "EMSDK defaulted to: $emsdk" -ForegroundColor Yellow
}

# Load EMSDK environment variables in PowerShell context
$envScript = Join-Path $emsdk "emsdk_env.ps1"
if (-not (Test-Path $envScript)) {
    Write-Error "Could not find emsdk_env.ps1 at $emsdk"
    exit 1
}

Write-Host "Loading Emscripten environment variables..." -ForegroundColor Cyan
. $envScript

# Configure WASM preset
Write-Host "Configuring CMake WASM preset..." -ForegroundColor Cyan
cmake --preset wasm
if ($LASTEXITCODE -ne 0) {
    Write-Error "CMake configuration failed."
    exit $LASTEXITCODE
}

# Build WASM preset
Write-Host "Building WASM targets..." -ForegroundColor Cyan
cmake --build --preset wasm
if ($LASTEXITCODE -ne 0) {
    Write-Error "WASM build failed."
    exit $LASTEXITCODE
}

# Run WASM smoke tests
Write-Host "Running WASM smoke tests..." -ForegroundColor Cyan
node wasm/pdfengine.test.mjs
if ($LASTEXITCODE -ne 0) {
    Write-Error "WASM smoke tests failed."
    exit $LASTEXITCODE
}

# Copy built targets to frontend public folder
$WasmBinDir = Join-Path $ProjectRoot "out\build\wasm\bin"
$FrontendPublic = Join-Path $ProjectRoot "frontend\public"

if (-not (Test-Path $FrontendPublic)) {
    Write-Warning "Frontend public folder not found at $FrontendPublic. Skipping copy."
} else {
    Write-Host "Copying WASM build artifacts to frontend public folder..." -ForegroundColor Cyan
    Copy-Item -Path (Join-Path $WasmBinDir "pdfengine.mjs") -Destination (Join-Path $FrontendPublic "pdfengine.mjs") -Force
    Copy-Item -Path (Join-Path $WasmBinDir "pdfengine.wasm") -Destination (Join-Path $FrontendPublic "pdfengine.wasm") -Force
    Write-Host "Successfully copied WASM files to $FrontendPublic" -ForegroundColor Green
}

Write-Host "Success! WASM built and deployed." -ForegroundColor Green