<?php

namespace App\Http\Middleware;

use App\Models\Central\Company;
use App\Tenancy\TenantManager;
use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

/**
 * Reads the request Host, extracts the tenant slug (subdomain of CENTRAL_DOMAIN),
 * loads the matching Company and stores it in the TenantManager singleton.
 *
 * Examples (CENTRAL_DOMAIN=service.mir.md):
 *   psauto.service.mir.md       → slug="psauto"
 *   service.mir.md              → no tenant (central context)
 *   www.service.mir.md          → reserved → 404
 */
class ResolveTenant
{
    /** Subdomains that are NEVER treated as tenant slugs. */
    public const RESERVED = [
        'www', 'api', 'app', 'admin', 'mail', 'mailpit',
        'git', 'gitea', 'coolify', 's3', 's3-admin',
        'ws', 'reverb', 'pulse', 'horizon',
    ];

    public function handle(Request $request, Closure $next, ?string $required = null)
    {
        $host = $request->getHost();
        $central = config('tenancy.central_domains', []);
        $centralPrimary = config('app.central_domain') ?: $central[0] ?? 'service.mir.md';

        // No subdomain → central context.
        if (in_array($host, $central, true)) {
            // Tenant panel must never run on the central host.
            if (str_starts_with($request->path(), 'app')) {
                throw new NotFoundHttpException('Tenant routes are not available on the central domain.');
            }
            return $next($request);
        }

        $slug = null;
        if (str_ends_with($host, ".{$centralPrimary}")) {
            $slug = substr($host, 0, -strlen(".{$centralPrimary}"));
        }

        if (! $slug || in_array($slug, self::RESERVED, true) || str_contains($slug, '.')) {
            // Reserved or multi-level subdomain → not a tenant. 404.
            throw new NotFoundHttpException("Unknown subdomain: {$host}");
        }

        $company = Company::where('slug', $slug)->first();

        if (! $company) {
            throw new NotFoundHttpException("Tenant '{$slug}' not found.");
        }

        app(TenantManager::class)->setCurrent($company);
        $request->attributes->set('tenant', $company);

        // Tell Spatie Permission to scope roles to this company.
        if (function_exists('app')) {
            app(\Spatie\Permission\PermissionRegistrar::class)
                ->setPermissionsTeamId($company->id);
        }

        if ($required === 'required' && ! app(TenantManager::class)->isResolved()) {
            throw new NotFoundHttpException();
        }

        return $next($request);
    }
}
