# cgshare one-line installer for Windows
#   irm https://tokensale.pc.am/install.ps1 | iex
#
# Downloads the official MSI from tokensale.pc.am, verifies its SHA-256,
# installs it (per-user, no admin rights needed) and launches cgshare.
# Nothing else is downloaded or executed.
$ErrorActionPreference = 'Stop'

$BaseUrl   = 'https://tokensale.pc.am/download'
$MsiName   = 'cgshare-Setup-1.2.3.msi'
$Version   = '1.2.3'
$Installer = Join-Path $env:LOCALAPPDATA 'Programs\cgshare\cgshare.exe'

Write-Host 'cgshare installer' -ForegroundColor Cyan
if (-not [Environment]::Is64BitOperatingSystem) {
    throw 'cgshare needs 64-bit Windows 10 or 11.'
}

# Already on this version? Just launch it.
$installed = Get-ChildItem 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall',
                             'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall' `
             -ErrorAction SilentlyContinue |
    Where-Object { $_.GetValue('DisplayName') -eq 'cgshare' } |
    ForEach-Object { $_.GetValue('DisplayVersion') } |
    Where-Object { $_ -eq $Version }
if ((Test-Path $Installer) -and $installed) {
    Write-Host "cgshare $Version is already installed - launching it." -ForegroundColor Green
    Start-Process $Installer
    return
}
Get-Process cgshare -ErrorAction SilentlyContinue | Stop-Process -Force

$tmp = Join-Path $env:TEMP $MsiName
Write-Host "Downloading $MsiName ..."
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
Invoke-WebRequest "$BaseUrl/$MsiName" -OutFile $tmp

Write-Host 'Verifying download ...'
$hashContent = (Invoke-WebRequest "$BaseUrl/$MsiName.sha256").Content
if ($hashContent -is [byte[]]) { $hashContent = [Text.Encoding]::ASCII.GetString($hashContent) }
$expected = $hashContent.Trim().Split(' ')[0].ToLower()
$actual = (Get-FileHash $tmp -Algorithm SHA256).Hash.ToLower()
if ($actual -ne $expected) {
    Remove-Item $tmp -Force -ErrorAction SilentlyContinue
    throw "SHA-256 mismatch (expected $expected, got $actual). Download discarded."
}
Write-Host 'Verified OK.'

Write-Host 'Installing (a progress window may appear) ...'
$proc = Start-Process msiexec.exe -ArgumentList @('/i', $tmp, '/passive', '/norestart') -Wait -PassThru
if ($proc.ExitCode -notin 0, 1641, 3010) {
    throw "Installer failed with exit code $($proc.ExitCode). Try the manual download: https://tokensale.pc.am/#download"
}
Remove-Item $tmp -Force -ErrorAction SilentlyContinue

if (Test-Path $Installer) {
    Write-Host 'Done - launching cgshare.' -ForegroundColor Green
    Write-Host 'Next: paste your connection bundle (cgshare1...) into the app and enrol this PC.'
    Start-Process $Installer
} else {
    Write-Host 'Installed. Find "cgshare" in your Start Menu.' -ForegroundColor Green
}