<#
.SYNOPSIS
  Fetches the Microsoft WebView2 SDK (headers + x64 loader libs) into
  native/third_party/webview2/, without needing NuGet or vcpkg installed.

  The SDK is downloaded directly from nuget.org (same package vcpkg/NuGet
  would fetch), unpacked, and only the pieces the CMake build needs are
  copied out. Safe to re-run — skips work if already present unless -Force
  is passed.
#>
param(
    [string]$Version = "1.0.4078.44",
    [switch]$Force
)

$ErrorActionPreference = "Stop"

$root = Join-Path $PSScriptRoot "webview2"
$includeDir = Join-Path $root "include"
$libDir = Join-Path $root "lib\x64"
$marker = Join-Path $includeDir "WebView2.h"

if ((Test-Path $marker) -and -not $Force) {
    Write-Host "WebView2 SDK already present at $root (use -Force to re-fetch)."
    exit 0
}

$tempDir = Join-Path ([System.IO.Path]::GetTempPath()) ("webview2-fetch-" + [guid]::NewGuid())
New-Item -ItemType Directory -Path $tempDir -Force | Out-Null
$zipPath = Join-Path $tempDir "webview2.zip"
$extractPath = Join-Path $tempDir "pkg"

try {
    $url = "https://www.nuget.org/api/v2/package/Microsoft.Web.WebView2/$Version"
    Write-Host "Downloading Microsoft.Web.WebView2 $Version from nuget.org..."
    Invoke-WebRequest -Uri $url -OutFile $zipPath -UseBasicParsing

    Write-Host "Extracting..."
    Expand-Archive -Path $zipPath -DestinationPath $extractPath -Force

    New-Item -ItemType Directory -Path $includeDir -Force | Out-Null
    New-Item -ItemType Directory -Path $libDir -Force | Out-Null

    Copy-Item (Join-Path $extractPath "build\native\include\*.h") $includeDir -Force
    Copy-Item (Join-Path $extractPath "build\native\x64\WebView2LoaderStatic.lib") $libDir -Force
    Copy-Item (Join-Path $extractPath "build\native\x64\WebView2Loader.dll.lib") $libDir -Force
    Copy-Item (Join-Path $extractPath "build\native\x64\WebView2Loader.dll") $libDir -Force

    Write-Host "WebView2 SDK $Version installed to $root"
}
finally {
    Remove-Item -Recurse -Force $tempDir -ErrorAction SilentlyContinue
}