<?php

namespace App\Services;

use App\Models\SandboxRoute;

class SandboxService
{
    /**
     * Enable (or create) a sandbox route.
     */
    public function enable(string $type, ?string $target): SandboxRoute
    {
        return SandboxRoute::updateOrCreate(
            ['type' => $type, 'target' => $target],
            ['is_active' => true]
        );
    }

    /**
     * Disable a sandbox route by id.
     */
    public function disable(int $id): void
    {
        SandboxRoute::findOrFail($id)->update(['is_active' => false]);
    }

    /**
     * Delete a sandbox route by id.
     */
    public function delete(int $id): void
    {
        SandboxRoute::findOrFail($id)->delete();
    }

    /**
     * Write /etc/postfix/transport.sandbox and run postmap.
     * Returns ['ok' => bool, 'message' => string].
     */
    public function syncTransportFile(): array
    {
        $file = config('sandbox.transport_file', '/etc/postfix/transport.sandbox');

        $routes = SandboxRoute::where('is_active', true)
            ->orderBy('type')
            ->orderBy('target')
            ->get();

        $lines = [];
        $hasGlobal = false;

        foreach ($routes as $route) {
            if ($route->type === 'global') {
                $hasGlobal = true;
            } elseif ($route->type === 'domain') {
                $lines[] = $route->target . ' sandbox:';
            } elseif ($route->type === 'address') {
                $lines[] = $route->target . ' sandbox:';
            }
        }

        // Global catch-all goes at the end
        if ($hasGlobal) {
            $lines[] = '* sandbox:';
        }

        $content = implode("\n", $lines);
        if ($lines) {
            $content .= "\n";
        }

        try {
            file_put_contents($file, $content);
        } catch (\Throwable $e) {
            return ['ok' => false, 'message' => 'Fehler beim Schreiben: ' . $e->getMessage()];
        }

        $out  = [];
        $code = 0;
        exec('postmap ' . escapeshellarg($file) . ' 2>&1', $out, $code);

        if ($code !== 0) {
            return ['ok' => false, 'message' => 'postmap Fehler: ' . implode(' ', $out)];
        }

        return ['ok' => true, 'message' => 'Transport-Datei synchronisiert (' . count($lines) . ' Einträge).'];
    }
}