<?php

namespace App\Http\Controllers\Authentication;

use App\Http\Controllers\Controller;
use App\Models\Barang;
use App\Models\Notifikasi;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use App\Models\User;
use Carbon\Carbon;
use Illuminate\Support\Facades\Hash;

class AuthController extends Controller
{
    /**
     * Handle user authentication.
     *
     * @param  Request  $request
     * @return \Illuminate\Http\JsonResponse|\Illuminate\Contracts\View\View
     */
    public function login(Request $request)
    {
        $data = ['title' => 'Login'];

        if (!$request->ajax() && $request->getMethod() === 'GET') {
            return view('page.auth.index', compact('data'));
        }

        $credentials = $request->only('email', 'password');

        $user = User::where('email', $credentials['email'])->first();

        if (!$user) {
            return response()->json(['message' => 'Email tidak ada di database!'], 200);
        }

        if (!Hash::check($credentials['password'], $user->password)) {
            return response()->json(['message' => 'Password salah!'], 200);
        }

        if (Auth::attempt($credentials)) {
            $this->checkForExpiredItems();
            $this->checkForAlmostExpiredItems();
            
            return response()->json([
                'message' => 'Berhasil Login!',
                'redirect' => route('dashboard')
            ], 200);
        } 

        return response()->json(['message' => 'Gagal Login!'], 200);
    }

    private function checkForExpiredItems()
    {
        $expiredItems = Barang::where('kadaluarsa', '<', now()->toDateString())->get();
        $users = User::all();

        foreach ($expiredItems as $item) {
            foreach ($users as $user) {
                $notificationExists = Notifikasi::where('user_id', $user->id)
                    ->where('barang_id', $item->id)
                    ->where('message', "Barang {$item->nama} sudah kadaluarsa.")
                    ->exists();

                if (!$notificationExists) {
                    Notifikasi::create([
                        'user_id' => $user->id,
                        'barang_id' => $item->id,
                        'message' => "Barang {$item->nama} sudah kadaluarsa.",
                        'created_at' => now(),
                        'updated_at' => now()
                    ]);
                }
            }
        }
    }

    private function checkForAlmostExpiredItems()
    {
        $almostExpiredItems = Barang::where('kadaluarsa', '>=', now()->toDateString())
            ->where('kadaluarsa', '<=', now()->addWeek()->toDateString())
            ->get();
        $users = User::all();

        foreach ($almostExpiredItems as $item) {
            foreach ($users as $user) {
                $daysLeft = now()->diffInDays(Carbon::parse($item->kadaluarsa), false);
                $message = $daysLeft > 0 
                    ? "Barang {$item->nama} akan kadaluarsa dalam {$daysLeft} hari." 
                    : "Barang {$item->nama} akan kadaluarsa hari ini.";

                $notificationExists = Notifikasi::where('user_id', $user->id)
                    ->where('barang_id', $item->id)
                    ->where('message', $message)
                    ->exists();

                if (!$notificationExists) {
                    Notifikasi::create([
                        'user_id' => $user->id,
                        'barang_id' => $item->id,
                        'message' => $message,
                    ]);
                }
            }
        }
    }

    /**
     * Handle user logout.
     *
     * @return \Illuminate\Http\JsonResponse
     */
    public function logout()
    {
        Auth::logout();

        return response()->json(['message' => 'Berhasil Logout!', 'redirect' => route('login')], 200);
    }
}