<?php

namespace App\Http\Controllers\Web\Auth;

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

class LoginController extends Controller
{
    /**
     * Show the login form, or registration form if no users exist.
     */
    public function showLoginForm()
    {
        if (Auth::check()) {
            return redirect()->route('dashboard');
        }

        // If database is empty, allow creating the first admin
        $hasUsers = User::exists();
        return view('auth.login', compact('hasUsers'));
    }

    /**
     * Handle authentication attempt.
     */
    public function login(Request $request)
    {
        $request->validate([
            'email' => 'required|string',
            'password' => 'required|string',
        ]);

        if (Auth::attempt($request->only('email', 'password'), $request->filled('remember'))) {
            $request->session()->regenerate();
            return redirect()->intended(route('dashboard'));
        }

        return back()->withErrors([
            'email' => 'Thông tin đăng nhập không chính xác.',
        ])->onlyInput('email');
    }

    /**
     * Handle first-time registration of the administrator.
     */
    public function registerAdmin(Request $request)
    {
        if (User::exists()) {
            return redirect()->route('login')->withErrors(['register' => 'Tài khoản quản trị đã tồn tại.']);
        }

        $request->validate([
            'name' => 'required|string|max:255',
            'email' => 'required|string|max:255|unique:users,email',
            'password' => 'required|string|min:8|confirmed',
        ]);

        $user = User::create([
            'name' => $request->name,
            'email' => $request->email,
            'password' => Hash::make($request->password),
        ]);

        Auth::login($user);

        return redirect()->route('dashboard')->with('success', 'Đăng ký tài khoản quản trị thành công!');
    }

    /**
     * Log the user out.
     */
    public function logout(Request $request)
    {
        Auth::logout();
        $request->session()->invalidate();
        $request->session()->regenerateToken();

        return redirect()->route('login');
    }
}