param (
    [switch]$SkipBuild = $false
)

$ErrorActionPreference = "Stop"

# Repository-Wurzelverzeichnis ermitteln
$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$ProjectRoot = Split-Path -Parent $ScriptDir
Set-Location $ProjectRoot

# Toolchain-Pfade sicherstellen (Zig + Cargo Bin)
$ZigDir = "C:\Users\pansih\AppData\Local\Microsoft\WinGet\Packages\zig.zig_Microsoft.Winget.Source_8wekyb3d8bbwe\zig-x86_64-windows-0.16.0"
$env:PATH = "$ZigDir;C:\Users\pansih\.cargo\bin;C:\Windows\System32;" + $env:PATH

# Version aus Cargo.toml auslesen
$CargoToml = Get-Content (Join-Path $ProjectRoot "Cargo.toml") -Raw
if ($CargoToml -match 'version\s*=\s*"([^"]+)"') {
    $Version = $matches[1]
} else {
    Write-Error "Konnte Versionsnummer nicht aus Cargo.toml ermitteln."
    exit 1
}

Write-Host "============================================================" -ForegroundColor Cyan
Write-Host " Sanctum Linux Release Packaging v$Version (x86_64 musl)" -ForegroundColor Cyan
Write-Host "============================================================" -ForegroundColor Cyan

# 1. Linux Release-Binary bauen
$Target = "x86_64-unknown-linux-musl"
$BinaryPath = Join-Path $ProjectRoot "target\$Target\release\sanctum"

if (-not $SkipBuild -or -not (Test-Path $BinaryPath)) {
    Write-Host "`n[1/3] Kompiliere statisches Linux-Binary via cargo-zigbuild..." -ForegroundColor Yellow
    cargo-zigbuild.exe zigbuild --target $Target --release
    if ($LASTEXITCODE -ne 0) {
        Write-Error "Linux-Build fehlgeschlagen!"
        exit $LASTEXITCODE
    }
    Write-Host "[OK] Linux-Binary erfolgreich gebaut." -ForegroundColor Green
} else {
    Write-Host "`n[1/3] Build uebersprungen (-SkipBuild)." -ForegroundColor DarkYellow
}

# 2. Release-Verzeichnisstruktur vorbereiten
Write-Host "`n[2/3] Erstelle Linux-Distributionspaket..." -ForegroundColor Yellow

$DistDir = Join-Path $ProjectRoot "dist"
if (-not (Test-Path $DistDir)) {
    New-Item -ItemType Directory -Path $DistDir -Force | Out-Null
}

$PackageName = "sanctum-v$Version-linux-x86_64"
$StagingDir = Join-Path $DistDir $PackageName
$TarGzFile = Join-Path $DistDir "$PackageName.tar.gz"

if (Test-Path $StagingDir) {
    Remove-Item $StagingDir -Recurse -Force
}
New-Item -ItemType Directory -Path $StagingDir -Force | Out-Null

# Dateien kopieren
Copy-Item $BinaryPath -Destination (Join-Path $StagingDir "sanctum") -Force
Copy-Item (Join-Path $ProjectRoot "README.md") -Destination $StagingDir -Force
Copy-Item (Join-Path $ProjectRoot "LICENSE") -Destination $StagingDir -Force
Copy-Item (Join-Path $ProjectRoot "CHANGELOG.md") -Destination $StagingDir -Force
Copy-Item (Join-Path $ProjectRoot "INSTALL.md") -Destination $StagingDir -Force
Copy-Item (Join-Path $ProjectRoot "QUICKSTART.md") -Destination $StagingDir -Force
Copy-Item (Join-Path $ProjectRoot "LEGAL.md") -Destination $StagingDir -Force
Copy-Item (Join-Path $ProjectRoot "THIRD_PARTY_LICENSES.md") -Destination $StagingDir -Force

# .tar.gz Archiv erstellen mit Windows nativem bsdtar
if (Test-Path $TarGzFile) {
    Remove-Item $TarGzFile -Force
}

tar.exe -czf $TarGzFile -C $DistDir $PackageName
if ($LASTEXITCODE -ne 0) {
    Write-Error "Fehler beim Erstellen des tar.gz-Archivs!"
    exit $LASTEXITCODE
}

# Staging-Verzeichnis bereinigen
Remove-Item $StagingDir -Recurse -Force

Write-Host "[OK] Archiv erstellt: $TarGzFile" -ForegroundColor Green

# 3. SHA-256 Pruefsummen berechnen und aktualisieren
Write-Host "`n[3/3] Aktualisiere SHA-256 Pruefsummen..." -ForegroundColor Yellow

$ChecksumFile = Join-Path $DistDir "SHA256SUMS.txt"
$TarHash = (Get-FileHash -Path $TarGzFile -Algorithm SHA256).Hash.ToLower()
$ElfHash = (Get-FileHash -Path $BinaryPath -Algorithm SHA256).Hash.ToLower()

# Existierende Pruefsummen lesen und um Linux-Assets ergaenzen/aktualisieren
$ExistingLines = if (Test-Path $ChecksumFile) {
    Get-Content $ChecksumFile | Where-Object { $_ -notmatch "$PackageName\.tar\.gz" -and $_ -notmatch "\s+sanctum$" }
} else {
    @()
}

$AllLines = @()
$AllLines += $ExistingLines
$AllLines += "$TarHash  $PackageName.tar.gz"
$AllLines += "$ElfHash  sanctum"

$AllLines | Set-Content -Path $ChecksumFile -Encoding utf8

$TarSizeMB = [math]::Round((Get-Item $TarGzFile).Length / 1MB, 2)
$ElfSizeMB = [math]::Round((Get-Item $BinaryPath).Length / 1MB, 2)

Write-Host "`n============================================================" -ForegroundColor Green
Write-Host " Sanctum Linux Release v$Version erfolgreich gepackt!" -ForegroundColor Green
Write-Host "============================================================" -ForegroundColor Green
Write-Host "  Archiv:        $TarGzFile ($TarSizeMB MB)"
Write-Host "  TAR SHA-256:   $TarHash"
Write-Host "  ELF SHA-256:   $ElfHash"
Write-Host "  Checksum-File: $ChecksumFile"
Write-Host "`nBereit fuer Gitea Release."