<?php
declare(strict_types=1);

namespace Cf7stg;

final class Settings_Page
{
    private const PAGE_SLUG = 'cf7stg-settings';
    private const NONCE = 'cf7stg_settings_nonce';

    public function register(): void
    {
        add_action('admin_menu', [$this, 'add_menu']);
        add_action('admin_post_cf7stg_save', [$this, 'handle_save']);
        add_action('admin_post_cf7stg_test', [$this, 'handle_test']);
        add_action('admin_post_cf7stg_retro', [$this, 'handle_retro']);
        add_action('admin_post_cf7stg_retry_failed', [$this, 'handle_retry_failed']);
        add_action('admin_post_cf7stg_purge_sent', [$this, 'handle_purge_sent']);
        add_action('admin_post_cf7stg_save_drop', [$this, 'handle_save_drop']);
        add_action('admin_post_cf7stg_reset_drop_counters', [$this, 'handle_reset_drop_counters']);
    }

    public function add_menu(): void
    {
        add_options_page(
            'CF7 Spam → Telegram',
            'CF7 Spam → TG',
            'manage_options',
            self::PAGE_SLUG,
            [$this, 'render']
        );
    }

    public function render(): void
    {
        if (!current_user_can('manage_options')) return;
        $page_slug = self::PAGE_SLUG;
        $nonce = self::NONCE;
        include CF7STG_PLUGIN_DIR . 'admin/views/settings.php';
    }

    public function handle_save(): void
    {
        $this->guard('cf7stg_save');
        if (!Settings::is_bot_token_constant()) {
            $token = (string)($_POST['bot_token'] ?? '');
            if ($token !== '') Settings::set_bot_token($token);
        }
        if (!Settings::is_chat_id_constant()) {
            Settings::set_chat_id(sanitize_text_field((string)($_POST['chat_id'] ?? '')));
        }
        Settings::set_site_title(sanitize_text_field((string)($_POST['site_title'] ?? '')));
        $this->redirect_back(['saved' => 1]);
    }

    public function handle_test(): void
    {
        $this->guard('cf7stg_test');
        try {
            TelegramClient::send_message(
                Settings::get_chat_id(),
                '✅ Тестовое сообщение из плагина CF7 Spam → Telegram ('
                    . esc_html(Settings::get_site_title()) . ')'
            );
            Settings::set_last_test(['ok' => true, 'at' => current_time('mysql'), 'err' => '']);
            $this->redirect_back(['test' => 'ok']);
        } catch (TelegramException $e) {
            Settings::set_last_test(['ok' => false, 'at' => current_time('mysql'), 'err' => $e->getMessage()]);
            $this->redirect_back(['test' => 'err']);
        }
    }

    public function handle_retro(): void
    {
        $this->guard('cf7stg_retro');
        $count = max(1, min(RetroImporter::MAX_COUNT, (int)($_POST['retro_count'] ?? 10)));
        $days  = max(0, (int)($_POST['retro_days'] ?? 0));
        $repeat = !empty($_POST['retro_repeat']);
        $result = RetroImporter::import($count, $days, $repeat);
        $this->redirect_back(['retro_added' => (int)$result['added'], 'retro_skipped' => (int)$result['skipped']]);
    }

    public function handle_retry_failed(): void
    {
        $this->guard('cf7stg_retry_failed');
        $n = Queue::retry_all_failed();
        $this->redirect_back(['retried' => $n]);
    }

    public function handle_purge_sent(): void
    {
        $this->guard('cf7stg_purge_sent');
        $n = Queue::purge_sent();
        $this->redirect_back(['purged' => $n]);
    }

    public function handle_save_drop(): void
    {
        $this->guard('cf7stg_save_drop');
        Settings::set_dry_run_drop(!empty($_POST['dry_run_drop']));
        Settings::set_hard_drop_enabled(!empty($_POST['hard_drop_enabled']));
        $threshold = (int)($_POST['drop_score_threshold'] ?? -5);
        Settings::set_drop_score_threshold($threshold);
        $this->redirect_back(['drop_saved' => 1]);
    }

    public function handle_reset_drop_counters(): void
    {
        $this->guard('cf7stg_reset_drop_counters');
        Settings::reset_drop_counters();
        $this->redirect_back(['drop_reset' => 1]);
    }

    private function guard(string $action): void
    {
        if (!current_user_can('manage_options')) wp_die('forbidden');
        check_admin_referer($action, self::NONCE);
    }

    private function redirect_back(array $extra = []): void
    {
        $url = add_query_arg(array_merge(['page' => self::PAGE_SLUG], $extra), admin_url('options-general.php'));
        wp_safe_redirect($url);
        exit;
    }
}