param(
    [string]$Version = "1.0.1"
)

$ErrorActionPreference = "Stop"
$root = Split-Path -Parent $MyInvocation.MyCommand.Path
$filesRoot = Join-Path $root "files"
$deleteFile = Join-Path $root "delete.txt"
$outFile = Join-Path $root "manifest.json"

if (!(Test-Path $filesRoot)) {
    New-Item -ItemType Directory -Path $filesRoot | Out-Null
}

$items = @()
Get-ChildItem -Path $filesRoot -File -Recurse | Sort-Object FullName | ForEach-Object {
    $relative = $_.FullName.Substring($filesRoot.Length).TrimStart('\','/') -replace '\','/'
    $hash = (Get-FileHash -Algorithm SHA256 -Path $_.FullName).Hash.ToLowerInvariant()

    $items += [ordered]@{
        Path   = $relative
        Url    = "files/$relative"
        Sha256 = $hash
        Size   = $_.Length
    }
}

# delete.txt e opcional. Um caminho relativo do CLIENTE por linha.
# Linhas vazias e linhas iniciadas por # sao ignoradas.
$deletes = @()
if (Test-Path $deleteFile) {
    foreach ($rawLine in (Get-Content -Path $deleteFile)) {
        $entry = $rawLine.Trim()
        if ([string]::IsNullOrWhiteSpace($entry)) { continue }
        if ($entry.StartsWith("#")) { continue }

        $entry = $entry -replace '\\','/'
        $entry = $entry.TrimStart('/')

        if ($entry -match '(^|/)\.\.(/|$)') {
            throw "Caminho inseguro em delete.txt: $entry"
        }

        $sameAsCurrentFile = $false
        foreach ($f in $items) {
            if ([string]::Equals([string]$f.Path, $entry, [System.StringComparison]::OrdinalIgnoreCase)) {
                $sameAsCurrentFile = $true
                break
            }
        }

        if ($sameAsCurrentFile) {
            Write-Host "IGNORADO no Delete (arquivo existe em files): $entry" -ForegroundColor Yellow
        }
        elseif ($deletes -notcontains $entry) {
            $deletes += $entry
        }
    }
}

$manifest = [ordered]@{
    Version = $Version
    Files   = $items
    Delete  = $deletes
}

$manifest | ConvertTo-Json -Depth 6 | Set-Content -Path $outFile -Encoding UTF8
Write-Host "Manifesto criado: $outFile" -ForegroundColor Green
Write-Host "Versao: $Version | Arquivos: $($items.Count) | Exclusoes: $($deletes.Count)" -ForegroundColor Cyan