# GoatCMS installer for Windows
# Auto-detects CPU architecture, downloads the matching binary, installs it,
# and adds the install directory to the system PATH.
#
# Usage (one-liner):
#   iwr -useb https://goatcms.com/dist/install.ps1 | iex
#
# Usage (with parameters):
#   .\install.ps1 -Version 0.0.1 -InstallDir "C:\Tools\GoatCMS"
[CmdletBinding()]
param(
    [string]$Version    = "latest",
    [string]$InstallDir = "$env:ProgramFiles\GoatCMS"
)

$ErrorActionPreference = "Stop"

# --- Detect architecture ------------------------------------------------
$archRaw = $env:PROCESSOR_ARCHITECTURE
if ($env:PROCESSOR_ARCHITEW6432) { $archRaw = $env:PROCESSOR_ARCHITEW6432 }

switch ($archRaw.ToUpper()) {
    "AMD64" { $arch = "amd64" }
    "ARM64" { $arch = "arm64" }
    default { throw "Unsupported architecture: $archRaw" }
}

# --- Resolve base URL ---------------------------------------------------
if ($Version -eq "latest") {
    $base = "https://goatcms.com/dist/latest"
} else {
    $base = "https://goatcms.com/dist/$Version"
}

Write-Host "Detected: OS=windows ARCH=$arch"
Write-Host "Installing from $base -> $InstallDir"

# --- Download -----------------------------------------------------------
$tmp = Join-Path $env:TEMP "goat-install"
New-Item -ItemType Directory -Force -Path $tmp | Out-Null

if ($Version -eq "latest") {
    $url = "$base/bin/goat_windows_${arch}.exe"
    $bin = Join-Path $tmp "goat.exe"
    Invoke-WebRequest -Uri $url -OutFile $bin
} else {
    $url = "$base/archives/goat_${Version}_windows_${arch}.zip"
    $zip = Join-Path $tmp "goat.zip"
    Invoke-WebRequest -Uri $url -OutFile $zip
    Expand-Archive -Path $zip -DestinationPath $tmp -Force
    $found = Get-ChildItem -Path $tmp -Recurse -Filter "goat.exe" | Select-Object -First 1
    if (-not $found) { throw "goat.exe not found in archive" }
    $bin = $found.FullName
}

# --- Install ------------------------------------------------------------
New-Item -ItemType Directory -Force -Path $InstallDir | Out-Null
$dest = Join-Path $InstallDir "goat.exe"
Copy-Item -Path $bin -Destination $dest -Force

# --- Add to system PATH -------------------------------------------------
$machinePath = [Environment]::GetEnvironmentVariable("Path", "Machine")
if ($machinePath -notlike "*$InstallDir*") {
    [Environment]::SetEnvironmentVariable("Path", "$machinePath;$InstallDir", "Machine")
    Write-Host "Added $InstallDir to system PATH"
}
$env:Path += ";$InstallDir"

# --- Verify -------------------------------------------------------------
Write-Host "Done. Verifying:"
& $dest version

Write-Host ""
Write-Host "Open a new terminal to use 'goat' from anywhere."