# Install or update the SBC Spotify upload helper, a browser extension for Chrome or Edge.
# Run in PowerShell (no admin needed):
#
#   irm https://www.spekebaptistchurch.org.uk/tools/spotify-upload-helper/install.ps1 | iex
#
# It downloads the helper from the church website, checks the download against the checksum the
# website publishes, and puts it in a folder of its own. Chrome and Edge only let you add an
# extension that isn't from their store by hand, so the first time you finish with "Load
# unpacked"; after that, running this again updates the folder in place.
$ErrorActionPreference = 'Stop'
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12  # Windows PowerShell 5.1

$site = 'https://www.spekebaptistchurch.org.uk/'
$folder = Join-Path $env:LOCALAPPDATA 'SBC\spotify-upload-helper'

Write-Host 'Checking the latest version on the church website...'
$info = (Invoke-RestMethod ($site + 'podcast-upload.json')).helper
if (-not $info.zip) { throw 'The website has no download for the helper at the moment. Try again later.' }

$zip = Join-Path ([IO.Path]::GetTempPath()) 'spotify-upload-helper.zip'
Invoke-WebRequest ($site.TrimEnd('/') + $info.zip) -OutFile $zip -UseBasicParsing
$hash = (Get-FileHash $zip -Algorithm SHA256).Hash.ToLower()
if ($hash -ne $info.sha256) {
  Remove-Item $zip
  throw "The download doesn't match the checksum the website published, so it was not installed. Try again later."
}

$firstTime = -not (Test-Path (Join-Path $folder 'manifest.json'))
if (Test-Path $folder) { Get-ChildItem $folder -Force | Remove-Item -Recurse -Force }  # clear old files
New-Item -ItemType Directory -Force $folder | Out-Null
Expand-Archive $zip -DestinationPath $folder -Force
Remove-Item $zip

$copied = ''
try { Set-Clipboard $folder; $copied = ' (the folder path is copied)' } catch { }
Write-Host ''
Write-Host "Installed version $($info.version) in $folder$copied." -ForegroundColor Green
Write-Host ''
if ($firstTime) {
  Write-Host 'To finish, in Chrome or Edge:'
  Write-Host '  1. Go to chrome://extensions (in Edge: edge://extensions).'
  Write-Host '  2. Turn on "Developer mode".'
  Write-Host "  3. Click `"Load unpacked`" and choose $folder (press Ctrl+V to paste the path)."
  Write-Host '  4. Click the Extensions button (the puzzle piece) and pin "SBC Spotify upload helper".'
} else {
  Write-Host 'To finish, go to chrome://extensions (or edge://extensions) and click the reload arrow on'
  Write-Host '"SBC Spotify upload helper", or restart the browser.'
}