<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

class EnsureIndiaMobile
{
    public function handle(Request $request, Closure $next): Response
    {
        if ($request->has('mobile')) {
            $mobile = $request->input('mobile');

            // Remove +91 prefix if present, then validate 10-digit format
            $normalized = preg_replace('/^\+91/', '', $mobile);
            
            // Validate India mobile format (10 digits starting with 6-9)
            if (!preg_match('/^[6-9]\d{9}$/', $normalized)) {
                return back()->withErrors([
                    'mobile' => 'Please enter a valid 10-digit mobile number starting with 6-9.',
                ])->withInput();
            }

            // Normalize mobile (store only 10 digits, no +91 prefix)
            $request->merge(['mobile' => $normalized]);
        }

        return $next($request);
    }
}