<?php

namespace App\Http\Requests\Auth;

use Illuminate\Auth\Events\Lockout;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\RateLimiter;
use Illuminate\Support\Str;
use Illuminate\Validation\ValidationException;

/**
 * Валидация и обработка попытки входа (меры ИАФ.1, ИАФ.6, УПД.6).
 *
 * Реализует блокировку после N неудачных попыток на T минут согласно
 * config/security.php → lockout.
 */
class LoginRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    /**
     * @return array<string, mixed>
     */
    public function rules(): array
    {
        return [
            'email' => ['required', 'string', 'email'],
            'password' => ['required', 'string'],
        ];
    }

    /**
     * Попытка аутентификации с проверкой ограничения скорости и блокировки.
     */
    public function authenticate(): void
    {
        $this->ensureIsNotRateLimited();

        if (! Auth::attempt($this->only('email', 'password'), $this->boolean('remember'))) {
            RateLimiter::hit($this->throttleKey(), $this->decaySeconds());

            throw ValidationException::withMessages([
                'email' => __('auth.failed'),
            ]);
        }

        RateLimiter::clear($this->throttleKey());
    }

    /**
     * Проверка лимита неудачных попыток (ИАФ.6).
     */
    public function ensureIsNotRateLimited(): void
    {
        $maxAttempts = (int) config('security.lockout.max_attempts');

        if (! RateLimiter::tooManyAttempts($this->throttleKey(), $maxAttempts)) {
            return;
        }

        event(new Lockout($this));

        $seconds = RateLimiter::availableIn($this->throttleKey());

        throw ValidationException::withMessages([
            'email' => __('auth.throttle', [
                'seconds' => $seconds,
                'minutes' => ceil($seconds / 60),
            ]),
        ]);
    }

    public function throttleKey(): string
    {
        return Str::transliterate(Str::lower($this->string('email')).'|'.$this->ip());
    }

    private function decaySeconds(): int
    {
        return (int) config('security.lockout.decay_minutes') * 60;
    }
}