# Restore frontend node_modules from an offline dependency archive.
param(
    [Parameter(Mandatory = $true)]
    [string]$Archive
)

$ErrorActionPreference = "Stop"
$Root = Split-Path $PSScriptRoot -Parent
$Frontend = Join-Path $Root "frontend-web"

if (-not (Test-Path $Archive)) {
    throw "Archive not found: $Archive"
}

Write-Host "Restoring frontend dependencies to $Frontend ..."

# Back up existing node_modules if present
$backup = Join-Path $Frontend "node_modules.bak"
if (Test-Path (Join-Path $Frontend "node_modules")) {
    if (Test-Path $backup) { Remove-Item $backup -Recurse -Force }
    Rename-Item (Join-Path $Frontend "node_modules") "node_modules.bak"
    Write-Host "  Existing node_modules backed up to node_modules.bak"
}

tar -xzf $Archive -C $Frontend

# Quick sanity check
$required = @(
    "node_modules\.pnpm",
    "node_modules\react\package.json",
    "node_modules\vite\package.json"
)
foreach ($rel in $required) {
    if (-not (Test-Path (Join-Path $Frontend $rel))) {
        throw "Restore incomplete — missing $rel"
    }
}

Write-Host ""
Write-Host "Restore complete. You can now run:"
Write-Host "  cd frontend-web"
Write-Host "  pnpm dev"