$ErrorActionPreference = "Stop"

$StagingRendezvousUrl = if ($env:TUCDESK_RENDEZVOUS_URL) { $env:TUCDESK_RENDEZVOUS_URL } else { "https://rendezvous-stag.tucdesk.app" }
$env:TUCDESK_RENDEZVOUS_URL = $StagingRendezvousUrl
[Environment]::SetEnvironmentVariable("TUCDESK_RENDEZVOUS_URL", $StagingRendezvousUrl, "User")
$HostedDownloadBaseUrl = if ($env:TUCDESK_DOWNLOAD_BASE_URL) { $env:TUCDESK_DOWNLOAD_BASE_URL } else { "https://get-stag.tucdesk.app/downloads" }
$env:TUCDESK_DOWNLOAD_BASE_URL = $HostedDownloadBaseUrl
[Environment]::SetEnvironmentVariable("TUCDESK_DOWNLOAD_BASE_URL", $HostedDownloadBaseUrl, "User")
$DownloadBaseUrl = if ($env:TUCDESK_DOWNLOAD_BASE_URL) { $env:TUCDESK_DOWNLOAD_BASE_URL } else { "" }
$Repo = if ($env:TUCDESK_GITHUB_REPO) { $env:TUCDESK_GITHUB_REPO } else { "portmytech/TucDesk-original" }
$Version = if ($env:TUCDESK_VERSION) { $env:TUCDESK_VERSION } else { "latest" }
$InstallRoot = if ($env:TUCDESK_INSTALL_DIR) { $env:TUCDESK_INSTALL_DIR } else { Join-Path $env:LOCALAPPDATA "TucDesk\bin" }
$ZipName = "tucdesk-windows-amd64.zip"

New-Item -ItemType Directory -Force -Path $InstallRoot | Out-Null

$useHostedDownloads = $DownloadBaseUrl -and $Version -eq "latest" -and -not $env:TUCDESK_GITHUB_REPO

$downloadUrl = if ($useHostedDownloads) {
  "$DownloadBaseUrl/tucdesk-windows-amd64.zip"
} elseif ($Version -eq "latest") {
  "https://github.com/$Repo/releases/latest/download/$ZipName"
} else {
  "https://github.com/$Repo/releases/download/$Version/$ZipName"
}

$tmpRoot = Join-Path $env:TEMP ("tucdesk-install-" + [Guid]::NewGuid().ToString("N"))
$zipPath = Join-Path $tmpRoot $ZipName
$extractDir = Join-Path $tmpRoot "extract"
$targetExe = Join-Path $InstallRoot "tucdesk.exe"

New-Item -ItemType Directory -Force -Path $tmpRoot | Out-Null
New-Item -ItemType Directory -Force -Path $extractDir | Out-Null

Write-Host "Downloading TucDesk from $downloadUrl"
Invoke-WebRequest -Uri $downloadUrl -OutFile $zipPath
Expand-Archive -Path $zipPath -DestinationPath $extractDir -Force

$sourceExe = Get-ChildItem -Path $extractDir -Filter "tucdesk.exe" -Recurse | Select-Object -First 1
if (-not $sourceExe) {
  throw "tucdesk.exe not found in downloaded archive."
}

Copy-Item $sourceExe.FullName $targetExe -Force

if (($env:PATH -split ';') -notcontains $InstallRoot) {
  $newPath = "$InstallRoot;$env:PATH"
  [Environment]::SetEnvironmentVariable("Path", $newPath, "User")
  $env:PATH = $newPath
}

Write-Host ""
Write-Host "TucDesk installed to $targetExe"
Write-Host "Open a new shell or run:"
Write-Host "  `"$targetExe`""