<?php

declare(strict_types=1);

namespace App\Controllers;

use App\Core\Controller;
use App\Core\Http\Request;
use App\Core\Http\Response;
use App\Core\Auth;
use App\Models\User;

class AuthController extends Controller
{
    public function loginForm(Request $request, Response $response): string|Response
    {
        if (Auth::check()) {
            return $this->redirect('/');
        }

        $users = User::all();

        return $this->render('auth/login', [
            'title' => 'Login - CanteenHub',
            'users' => $users,
        ], 'layouts/main');
    }

    public function login(Request $request, Response $response): Response
    {
        $identifier = trim((string)$request->post('identifier', ''));
        $password = (string)$request->post('password', '');

        if (empty($identifier) || empty($password)) {
            return $this->redirect('/login', null, 'Please provide your username/email and password.');
        }

        if (Auth::attempt($identifier, $password)) {
            $user = Auth::user();
            return $this->redirect('/', "Welcome back, {$user['name']}!");
        }

        return $this->redirect('/login', null, 'Invalid username or password.');
    }

    public function quickLogin(Request $request, Response $response): Response
    {
        $userId = (int)$request->post('user_id');
        $user = User::find($userId);

        if ($user) {
            Auth::login($user);
            return $this->redirect('/', "Logged in as {$user['name']}!");
        }

        return $this->redirect('/login', null, 'User not found.');
    }

    public function registerForm(Request $request, Response $response): string|Response
    {
        if (Auth::check()) {
            return $this->redirect('/');
        }

        return $this->render('auth/register', [
            'title' => 'Register Account - CanteenHub',
        ], 'layouts/main');
    }

    public function register(Request $request, Response $response): Response
    {
        $name = trim((string)$request->post('name', ''));
        $username = trim((string)$request->post('username', ''));
        $email = trim((string)$request->post('email', ''));
        $password = (string)$request->post('password', '');

        if (empty($name) || empty($username) || empty($email) || strlen($password) < 4) {
            return $this->redirect('/register', null, 'Please fill in all fields (password must be at least 4 characters).');
        }

        if (User::findByIdentifier($username) || User::findByIdentifier($email)) {
            return $this->redirect('/register', null, 'Username or Email is already registered.');
        }

        try {
            $userId = User::create($name, $username, $email, $password);
            $user = User::find($userId);
            Auth::login($user);

            return $this->redirect('/', "Account registered! Welcome to CanteenHub, {$name}!");
        } catch (\Throwable $e) {
            return $this->redirect('/register', null, 'Registration error: ' . $e->getMessage());
        }
    }

    public function logout(Request $request, Response $response): Response
    {
        Auth::logout();
        return $this->redirect('/login', 'You have been logged out.');
    }
}