# PURE Donor installer for Windows: https://purepure.app/deltag
# Usage (PowerShell): irm https://fleet.purepure.app/deltag/install.ps1 | iex
# Without the browser lane (pages that need JavaScript; less disk and memory):
#   $env:PURE_DONOR_BROWSER=0; irm https://fleet.purepure.app/deltag/install.ps1 | iex
# Everything goes in %LOCALAPPDATA%\PURE-Donor plus one start-up file; no
# administrator rights are needed. One script block: nothing leaks into the
# session, and a download cut short runs nothing.
& {
$ErrorActionPreference = "Stop"
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
$Master = if ($env:PURE_WORK_MASTER_URL) { $env:PURE_WORK_MASTER_URL } else { "https://fleet.purepure.app" }
$HomeDir = if ($env:PURE_DONOR_HOME) { $env:PURE_DONOR_HOME } else { Join-Path $env:LOCALAPPDATA "PURE-Donor" }
$UvVersion = "0.13.5"
$Admin = ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole(
    [Security.Principal.WindowsBuiltInRole]::Administrator)
if ($Admin -and $env:PURE_DONOR_ALLOW_ADMIN -ne "1") {
    Write-Host "Luk dette vindue og åbn PowerShell igen som almindelig bruger (ikke 'Kør som administrator')."
    return
}
$Web = New-Object System.Net.WebClient
try { [void]$Web.DownloadString("$Master/deltag/manifest.json") } catch {
    Write-Host "PURE Donor åbner snart. Se $Master/deltag"; return
}
if ($env:PROCESSOR_ARCHITECTURE -eq "ARM64") {
    $Asset = "aarch64-pc-windows-msvc"; $Sum = "09f47edf90726084a70f9426f6e3ca4f46e9bf7cbf23b1716ec64d60b055fae3"
} else {
    $Asset = "x86_64-pc-windows-msvc"; $Sum = "a38b8d1902b7cfbc76b423ba1bb456f623f42064cdc72628b6075b89afd1019a"
}
New-Item -ItemType Directory -Force -Path (Join-Path $HomeDir "bin"), (Join-Path $HomeDir "downloads") | Out-Null
# WebClient writes no Mark-of-the-Web and handles any profile path.
$Zip = Join-Path $HomeDir "downloads\uv.zip"
Write-Host "==> Henter installationsværktøjet uv $UvVersion"
$Web.DownloadFile("https://github.com/astral-sh/uv/releases/download/$UvVersion/uv-$Asset.zip", $Zip)
if ((Get-FileHash -Algorithm SHA256 $Zip).Hash.ToLower() -ne $Sum) {
    Remove-Item $Zip -Force; throw "Værktøjet kunne ikke verificeres; intet er installeret"
}
Expand-Archive -Force $Zip (Join-Path $HomeDir "downloads\uv")
Move-Item -Force (Join-Path $HomeDir "downloads\uv\uv.exe") (Join-Path $HomeDir "bin\uv.exe")
Remove-Item -Recurse -Force $Zip, (Join-Path $HomeDir "downloads\uv")
$Uv = Join-Path $HomeDir "bin\uv.exe"
# Process environment for this install only; restored in `finally`, so the
# PowerShell window is as it was.
$Names = "UV_PYTHON_INSTALL_DIR", "UV_CACHE_DIR", "UV_MANAGED_PYTHON", "UV_NO_CONFIG",
         "PURE_DONOR_HOME", "PURE_WORK_MASTER_URL"
$Saved = @{}
foreach ($Name in $Names) { $Saved[$Name] = [Environment]::GetEnvironmentVariable($Name, "Process") }
try {
# Python, uv's cache and nothing else outside the donor folder (no registry entry).
$env:UV_PYTHON_INSTALL_DIR = Join-Path $HomeDir "python"
$env:UV_CACHE_DIR = Join-Path $HomeDir "cache"
$env:UV_MANAGED_PYTHON = "1"
$env:UV_NO_CONFIG = "1"
Write-Host "==> Henter Python 3.12"
& $Uv python install --quiet --no-bin --no-registry 3.12
if ($LASTEXITCODE -ne 0) { throw "Python kunne ikke installeres" }
$Python = (& $Uv python find 3.12).Trim()
Write-Host "==> Henter PURE Donor"
$Web.DownloadFile("$Master/deltag/launcher.py", (Join-Path $HomeDir "launcher.py"))
$env:PURE_DONOR_HOME = $HomeDir
$env:PURE_WORK_MASTER_URL = $Master
$Extra = @()
if ($env:PURE_DONOR_BROWSER -eq "0") { $Extra += "--no-browser" }
& $Python (Join-Path $HomeDir "launcher.py") install @Extra
} finally {
    foreach ($Name in $Names) { [Environment]::SetEnvironmentVariable($Name, $Saved[$Name], "Process") }
}
}