# Installs CLIDE on Windows.
#
#   irm https://downloads.clide.tools/install.ps1 | iex
#
# What it does: reads latest/latest.json, downloads the Windows installer, checks its SHA-256,
# and runs it. CLIDE installs for this user only; no administrator rights are needed.
#
# Why a script: CLIDE is free during the beta and not signed by Microsoft. A file a browser
# downloads is marked as from the internet, and SmartScreen then warns before it runs. A file
# PowerShell downloads is not marked, so the installer runs without the warning.
$ErrorActionPreference = 'Stop'
$ProgressPreference = 'SilentlyContinue'

$downloads = if ($env:CLIDE_DOWNLOADS) { $env:CLIDE_DOWNLOADS } else { 'https://downloads.clide.tools' }
$platform = 'win-x64'  # Windows on ARM runs the x64 build.

function Fail($message) {
  Write-Host "CLIDE install: $message" -ForegroundColor Red
  exit 1
}

try {
  $latest = Invoke-RestMethod -Uri "$downloads/latest/latest.json?$([DateTimeOffset]::UtcNow.ToUnixTimeSeconds())" -UseBasicParsing
} catch {
  Fail "could not reach $downloads"
}
$build = $latest.installers.$platform
if (-not $build) { Fail "no CLIDE build for Windows yet" }
# Each installer says which release it is from: platforms are published one at a time.
$version = if ($build.version) { $build.version } else { $latest.version }

# The terms: CLIDE asks people to agree to them when it first opens.
Write-Host "CLIDE is beta software, provided as is, with no warranty. You use it at your own risk."
Write-Host "By installing or using it, you agree to its Terms of Use (https://clide.tools/terms.html)"
Write-Host "and Privacy Policy (https://clide.tools/privacy.html)."
Write-Host ""

$work = Join-Path ([IO.Path]::GetTempPath()) ("clide-" + [Guid]::NewGuid())
New-Item -ItemType Directory -Path $work | Out-Null
try {
  $zip = Join-Path $work $build.file
  Write-Host "Downloading CLIDE $version..."
  Invoke-WebRequest -Uri "$downloads/latest/$($build.file)" -OutFile $zip -UseBasicParsing

  $got = (Get-FileHash -Algorithm SHA256 -Path $zip).Hash.ToLower()
  if ($got -ne $build.sha256) { Fail "the download's checksum does not match ($got, expected $($build.sha256)). Nothing was installed." }

  Expand-Archive -Path $zip -DestinationPath $work -Force
  $setup = Get-ChildItem -Path $work -Recurse -Filter '*Setup*.exe' | Select-Object -First 1
  if (-not $setup) { Fail "no installer in the download" }

  Get-Process -Name 'CLIDE', 'launcher' -ErrorAction SilentlyContinue |
    Where-Object { $_.Path -like '*tools.clide*' } |
    ForEach-Object { Write-Host 'Closing CLIDE to replace it...'; $_.CloseMainWindow() | Out-Null; Start-Sleep -Seconds 2 }

  Write-Host "Installing CLIDE $version..."
  Start-Process -FilePath $setup.FullName -WorkingDirectory $setup.DirectoryName -Wait
  Write-Host "Installed CLIDE $version. Find it in the Start menu."
} finally {
  Remove-Item -Recurse -Force $work -ErrorAction SilentlyContinue
}