# Requires Elevated PowerShell Session
if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    throw "This script must be executed in a PowerShell session running as Administrator."
}

$ErrorActionPreference = 'Stop'
$tempDir = Join-Path $env:TEMP "WT_Install_$([Guid]::NewGuid().Guid)"
New-Item -ItemType Directory -Path $tempDir -Force | Out-Null

try {
    # Fetch latest stable non-prerelease release from GitHub API
    Write-Host "Querying GitHub API for the latest non-prerelease Terminal release..." -ForegroundColor Cyan
    $releaseUrl = "https://api.github.com/repos/microsoft/terminal/releases/latest"
    $release = Invoke-RestMethod -Uri $releaseUrl -Headers @{ "User-Agent" = "PowerShell" }
    $asset = $release.assets | Where-Object { $_.name -like "*PreinstallKit.zip" } | Select-Object -First 1

    # Use dynamically fetched URL or fallback to the specified release URL
    $downloadUrl = if ($asset) { 
        $asset.browser_download_url 
    } else { 
        "https://github.com/microsoft/terminal/releases/download/v1.24.11911.0/Microsoft.WindowsTerminal_1.24.11911.0_8wekyb3d8bbwe.msixbundle_Windows10_PreinstallKit.zip" 
    }

    # Download and extract the PreinstallKit archive
    $zipPath = Join-Path $tempDir "PreinstallKit.zip"
    $extractPath = Join-Path $tempDir "Extracted"

    Write-Host "Downloading preinstallation kit..." -ForegroundColor Cyan
    Invoke-WebRequest -Uri $downloadUrl -OutFile $zipPath -UseBasicParsing
    Expand-Archive -Path $zipPath -DestinationPath $extractPath -Force

    # Locate package files from extracted archive
    $bundle  = (Get-ChildItem -Path $extractPath -Filter "*.msixbundle" -Recurse).FullName
    $license = (Get-ChildItem -Path $extractPath -Filter "*License*.xml" -Recurse).FullName
    $deps    = (Get-ChildItem -Path $extractPath -Filter "Microsoft.UI.Xaml*.appx" -Recurse).FullName

    # Provision package system-wide for all users
    Write-Host "Provisioning Windows Terminal across all user profiles..." -ForegroundColor Cyan
    $params = @{
        Online                = $true
        PackagePath           = $bundle
        LicensePath           = $license
        DependencyPackagePath = $deps
    }
    Add-AppxProvisionedPackage @params | Out-Null
    Write-Host "Successfully installed Windows Terminal system-wide!" -ForegroundColor Green

} finally {
    # Clean up temporary downloaded files
    Remove-Item -Path $tempDir -Recurse -Force -ErrorAction SilentlyContinue
}