<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

class TenantScope
{
    /**
     * Handle an incoming request.
     * Set the global tenant_id so that queries are scoped to the current tenant.
     */
    public function handle(Request $request, Closure $next): Response
    {
        $tenantId = session('tenant_id');

        if ($tenantId) {
            // Set the global tenant context for scoped queries
            app()->instance('tenant_id', $tenantId);
        }

        return $next($request);
    }

    /**
     * Run a callback without the tenant scope.
     * Useful for super-admin operations that span all tenants.
     */
    public static function withoutTenantScope(callable $callback): mixed
    {
        $previousTenantId = app('tenant_id');

        // Clear the tenant context
        app()->instance('tenant_id', null);

        try {
            return $callback();
        } finally {
            // Restore the previous tenant context
            app()->instance('tenant_id', $previousTenantId);
        }
    }

    /**
     * Get the current tenant ID.
     */
    public static function getCurrentTenantId(): ?int
    {
        return app('tenant_id');
    }

    /**
     * Check if a tenant scope is currently active.
     */
    public static function hasTenantScope(): bool
    {
        return app('tenant_id') !== null;
    }
}