<?php

namespace App\Http\Controllers;

use App\Models\LDCNetworks;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use lfkeitel\phptotp\Base32;
use lfkeitel\phptotp\Totp;

class LDCNetworkController extends Controller
{
    public function index(Request $request) {
        $networks = LDCNetworks::all();
        return view('ldc-networks.index', ['networks' => $networks]);
    }

    public function add(Request $request) {
        return view('ldc-networks.add');
    }

    public function edit(Request $request) {
        $network_id = $request->id;
        $network = LDCNetworks::findOrFail($network_id);
        return view('ldc-networks.edit', ['network' => $network]);
    }

    public function update(Request $request) {
        $network_id = $request->id;
        $network = LDCNetworks::findOrFail($network_id);
        $this->makeChanges($request, $network);
        return redirect()->route('ldc-networks.edit', ['id' => $network->id])->with('status', 'Sauvegardée !');
    }

    public function store(Request $request) {
        $network = new LDCNetworks();
        $this->makeChanges($request, $network);
        return redirect()->route('ldc-networks.edit', ['id' => $network->id])->with('status', 'Sauvegardée !');
    }

    public function delete(Request $request) {
        $network_id = $request->id;
        $network = LDCNetworks::findOrFail($network_id);

        return view('ldc-networks.delete', ['network' => $network]);
    }

    public function forceDelete(Request $request)
    {
        $network_id = $request->id;
        $otp = $request->otp;

        $lastCode = (new Totp())->GenerateToken(Base32::decode(Auth::user()->totp_secret), Carbon::now()->subSeconds(30)->timestamp);
        $code = (new Totp())->GenerateToken(Base32::decode(Auth::user()->totp_secret));

        if ($otp === $code || $otp === $lastCode) {
            $network = LDCNetworks::findOrFail($network_id);
            $network->delete();
            return redirect()->route('ldc-networks.index')->with('status', 'IP supprimée !');
        }else{
            return redirect()->route('ldc-networks.edit', ['id' => $network_id])->with('error', 'Code de vérification invalide.');
        }
    }

    private function makeChanges($request, $network) {
        $cidr = $request->cidr;
        $range = $this->cidrToRange($cidr);

        $network->cidr = $cidr;
        $network->first_ip = $range[0];
        $network->last_ip = $range[1];
        $network->save();
    }

    private function cidrToRange($cidr) {
        $range = array();
        $cidr = explode('/', $cidr);
        $range[0] = long2ip((ip2long($cidr[0])) & ((-1 << (32 - (int)$cidr[1]))));
        $range[1] = long2ip((ip2long($range[0])) + pow(2, (32 - (int)$cidr[1])) - 1);
        return $range;
    }
}