param(
    [switch]$Strict,
    [switch]$Help
)

$ErrorActionPreference = 'Stop'
$ScriptName = Split-Path -Leaf $PSCommandPath

if ($Help) {
    @'
Usage: win-tool-check.ps1 [-Strict] [-Help]

Read-only Windows workstation checks for PenWebTools helpers.
'@
    exit 0
}

function Write-Section {
    param([string]$Name)
    Write-Host ""
    Write-Host "== $Name =="
}

function Test-Command {
    param([string]$Name)
    $cmd = Get-Command $Name -ErrorAction SilentlyContinue
    if ($cmd) {
        Write-Host ("OK      {0,-12} {1}" -f $Name, $cmd.Source)
        return $true
    }
    Write-Host ("MISSING {0,-12}" -f $Name)
    return $false
}

Write-Section 'PowerShell'
Write-Host "Version: $($PSVersionTable.PSVersion)"
Write-Host "Edition: $($PSVersionTable.PSEdition)"
Write-Host "Host: $($Host.Name)"
Write-Host "ExecutionPolicy CurrentUser: $(Get-ExecutionPolicy -Scope CurrentUser)"
Write-Host "ExecutionPolicy Process: $(Get-ExecutionPolicy -Scope Process)"

Write-Section 'Profiles'
$profiles = @(
    $PROFILE.CurrentUserCurrentHost,
    $PROFILE.CurrentUserAllHosts
) | Select-Object -Unique
foreach ($path in $profiles) {
    $exists = Test-Path -LiteralPath $path
    $state = if ($exists) { 'exists' } else { 'missing' }
    Write-Host "$state $path"
    if ($exists) {
        $hasBlock = Select-String -LiteralPath $path -SimpleMatch '# >>> penwebtools-powershell-prompt' -Quiet
        Write-Host "  penwebtools prompt block: $hasBlock"
    }
}

Write-Section 'Commands'
$requiredOk = $true
foreach ($name in @('powershell', 'curl', 'git', 'ssh', 'winget', 'wsl', 'pwsh')) {
    if (-not (Test-Command $name)) {
        if ($name -eq 'powershell') { $requiredOk = $false }
    }
}

Write-Section 'Windows'
Write-Host "OS: $([System.Environment]::OSVersion.VersionString)"
Write-Host "User: $([System.Environment]::UserName)"
Write-Host "Is64BitOS: $([System.Environment]::Is64BitOperatingSystem)"

if ($Strict -and -not $requiredOk) {
    Write-Host "[$ScriptName] Strict check failed."
    exit 1
}