# EnvKit installer for Windows 10/11 (x64).
#
#   irm https://envkit.net/install.ps1 | iex
#
# Downloads the latest EnvKit-Setup-<version>.exe from GitHub Releases and runs
# it silently (per-machine install, so Windows shows one UAC prompt). Re-running
# upgrades an existing install; your sites, databases and settings are kept.
#
# The installer is told it came from this script (/SOURCE=script-ps1) so EnvKit
# can count installs per channel. An optional website campaign code rides along
# from $env:ENVKIT_CAMPAIGN (lowercase letters, digits, - and _; max 64):
#
#   $env:ENVKIT_CAMPAIGN = 'hn'; irm https://envkit.net/install.ps1 | iex
#
# macOS: curl -fsSL https://envkit.net/install.sh | sh

$ErrorActionPreference = 'Stop'
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

$Repo = 'Env-Kit/envkit-releases'
$Api = "https://api.github.com/repos/$Repo/releases/latest"
$Releases = "https://github.com/$Repo/releases"

# Anything that is not a plain code is ignored rather than passed on.
$InstallerArgs = '/S /SOURCE=script-ps1'
if ($env:ENVKIT_CAMPAIGN -and $env:ENVKIT_CAMPAIGN -cmatch '^[a-z0-9][a-z0-9_-]{0,63}$') {
  $InstallerArgs += " /CAMPAIGN=$($env:ENVKIT_CAMPAIGN)"
}

function Fail($msg) {
  Write-Host "envkit: $msg" -ForegroundColor Red
  exit 1
}

if (-not [Environment]::Is64BitOperatingSystem) {
  Fail "EnvKit needs 64-bit Windows 10/11. See $Releases"
}

Write-Host 'Looking up the latest EnvKit release...'
try {
  $release = Invoke-RestMethod -Uri $Api -Headers @{ Accept = 'application/vnd.github+json'; 'User-Agent' = 'envkit-install' }
} catch {
  Fail "Could not reach the GitHub API. See $Releases"
}

$asset = $release.assets | Where-Object { $_.name -like '*.exe' } | Select-Object -First 1
if (-not $asset) { Fail "No Windows installer found in the latest release. See $Releases" }

$version = $release.tag_name
$tmp = Join-Path ([IO.Path]::GetTempPath()) "envkit-install-$([Guid]::NewGuid().ToString('N').Substring(0, 8))"
New-Item -ItemType Directory -Path $tmp -Force | Out-Null
$exe = Join-Path $tmp $asset.name

try {
  Write-Host "Downloading EnvKit $version..."
  $prev = $ProgressPreference
  $ProgressPreference = 'SilentlyContinue'
  Invoke-WebRequest -Uri $asset.browser_download_url -OutFile $exe -UseBasicParsing
  $ProgressPreference = $prev

  # Close a running copy so the installer can replace its files.
  Get-Process -Name 'EnvKit' -ErrorAction SilentlyContinue | ForEach-Object {
    Write-Host 'Closing the running EnvKit...'
    $_.CloseMainWindow() | Out-Null
    if (-not $_.WaitForExit(5000)) { $_ | Stop-Process -Force }
  }

  Write-Host 'Running the installer (Windows will ask for permission)...'
  # NSIS silent install; per-machine install needs elevation.
  $proc = Start-Process -FilePath $exe -ArgumentList $InstallerArgs -Verb RunAs -Wait -PassThru
  if ($proc.ExitCode -ne 0) { Fail "Installer exited with code $($proc.ExitCode)." }
} finally {
  Remove-Item -Recurse -Force $tmp -ErrorAction SilentlyContinue
}

$installed = @(
  (Join-Path $env:ProgramFiles 'EnvKit\EnvKit.exe'),
  (Join-Path $env:LOCALAPPDATA 'Programs\EnvKit\EnvKit.exe')
) | Where-Object { Test-Path $_ } | Select-Object -First 1

Write-Host "EnvKit $version installed." -ForegroundColor Green
if ($installed) {
  Write-Host 'Launching...'
  Start-Process -FilePath $installed
} else {
  Write-Host 'Open EnvKit from the Start menu to get started.'
}